WO2017142142A1 - Anchor for ligament surgery - Google Patents

Anchor for ligament surgery Download PDF

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Publication number
WO2017142142A1
WO2017142142A1 PCT/KR2016/008198 KR2016008198W WO2017142142A1 WO 2017142142 A1 WO2017142142 A1 WO 2017142142A1 KR 2016008198 W KR2016008198 W KR 2016008198W WO 2017142142 A1 WO2017142142 A1 WO 2017142142A1
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WO
WIPO (PCT)
Prior art keywords
hole
anchor
suture
end part
bone
Prior art date
Application number
PCT/KR2016/008198
Other languages
French (fr)
Inventor
Kyung Hak Kim
Ki Nam Seo
Yong Ju Kim
Original Assignee
Seohancare Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seohancare Co., Ltd. filed Critical Seohancare Co., Ltd.
Publication of WO2017142142A1 publication Critical patent/WO2017142142A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8645—Headless screws, e.g. ligament interference screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/869—Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00933—Material properties bone or bone-like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0414—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors having a suture-receiving opening, e.g. lateral opening
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0445—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors cannulated, e.g. with a longitudinal through-hole for passage of an instrument
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0817—Structure of the anchor
    • A61F2002/0841—Longitudinal channel for insertion tool running through the whole tendon anchor, e.g. for accommodating bone drill, guidewire
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0847—Mode of fixation of anchor to tendon or ligament

Definitions

  • the present invention relates generally to an anchor for ligament surgery.
  • a ligament is a tough fibrous tissue that connects bones to other bones, and since a ligament is normally located in a joint to keep the joint stable or to limit the mobility of the joint, the ligament may be damaged, namely, it may be distorted, twisted, torn, or disconnected.
  • the disconnection of the ligament usually occurs at a part where a ligament and a bone are connected to each other, and to reconstruct a damaged ligament, it is necessary to reattach the ligament to the bone.
  • a widely-known method of fixing a ligament to a bone is to use a suture and an anchor. According to ligament reconstruction using the suture and the anchor, after the anchor is fixed to a bone, the suture connected to the anchor is connected to a ligament, and thereby the ligament is fixed to the bone.
  • the anchor is inserted into the guide hole. Accordingly, since the guide hole is formed using the surgical drill bit, the surgical drill bit is removed, and then the anchor is inserted into the guide hole, it is difficult to find the guide hole when inserting the anchor.
  • the present invention has been made keeping in mind the above problems occurring in the related art, and the present invention is intended to propose an anchor for ligament surgery, in which the anchor simplifies the process of surgery, and is efficiently inserted into an affected part that requires a surgical operation.
  • an anchor for ligament surgery applied to arthroscopic surgery including: a lower end part provided with a first through hole axially formed through the lower end part; a body part positioned on an upper end of the lower end part and provided with a second through hole axially formed through the body part, the second through hole communicating with the first through hole; and an upper end part positioned on an upper end of the body part and provided with a third through hole axially formed through the upper end part, the third through hole communicating with the second through hole, wherein a surgical drill bit provided with a pointed part on a free end thereof is removably inserted into the first through hole, the second through hole, and the third through hole.
  • a bone substitute may be charged in the first through hole and the second through hole.
  • the body part may comprise an exposure hole formed in a direction perpendicular to an axial direction of the second through hole such that an inside of the second through hole communicates with an outside of the body part, thereby exposing the bone substitute charged in the second through hole to the outside of the body part.
  • the first through hole may be provided with internal threads on an inner circumferential surface thereof.
  • the surgical drill bit may be provided with external threads on a portion of an outer circumferential surface thereof that contacts with the inner circumferential surface of the first through hole when the surgical drill bit is inserted into the first through hole, the second through hole, and the third through hole, so that the external threads are engaged with the internal threads of the first through hole.
  • a material of the lower end part, the body part, and the upper end part may include PEEK.
  • a diameter of the upper end part may be larger than a diameter of the lower end part.
  • the upper end part may be provided with two suture holes formed in directions perpendicular to an axial direction of the third through hole such that the suture holes are opposed to each other, and a suture may pass through the two suture holes.
  • height and width of each of the suture holes may have preset dimensions that are set to allow the suture to move in the suture holes.
  • the anchor for ligament surgery may be applied to a rotator cuff surgery.
  • the anchor allows a surgical drill bit to be removably inserted into a first through hole, a second through hole, and a third through hole, and while the surgical drill bit is inserted into the anchor, the anchor is inserted into a bone, thereby allowing an efficient insertion into the bone, and simplifying the process of surgery.
  • the anchor according to the present invention does not require a step of finding a guide hole as in the related art, thereby significantly increasing efficiency of a surgery.
  • the anchor includes the first through hole and the second through hole in which a bone substitute is charged, thereby allowing rigidity to be obtained against an external force applied by a restored bone even after the surgical drill bit is removed from the first through hole, the second through hole, and a third through hole.
  • an anchor for ligament surgery in which the anchor allows the bone substitute charged in the first through hole and the second through hole to adhere to a peripheral bone via an exposure hole so as to be combined with the peripheral bone, thereby increasing a combining force with the bone.
  • an anchor for ligament surgery in which the anchor includes internal threads on an inner circumferential surface of the first through hole, and the surgical drill bit having external threads with which the internal threads are engaged, thereby making engagement and disengagement with the surgical drill bit efficient.
  • the anchor includes a lower end part, a body part, and an upper end part that are made of materials including polyetherethereketone (PEEK), thereby preventing metallosis and osteolysis, and realizing biocompatibility.
  • PEEK polyetherethereketone
  • the anchor includes the upper end part having a width larger than a width of the lower end part to be press-fitted into a bone, thereby increasing the combining force with the bone.
  • an anchor for ligament surgery in which the anchor allows a width and height of suture holes through which a suture passes to be preset so as to enable movement of the suture, and thus allows the suture to move during combination of the suture with a ligament, thereby enabling the suture to be efficiently combined with the ligament.
  • FIG. 1 is a perspective view of an anchor for ligament surgery slantingly shown from an upper side of the anchor according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the anchor for ligament surgery equipped with a surgical drill bit, the anchor being taken along line III ⁇ III of FIG. 1 according to the embodiment of the present invention;
  • FIG. 3 is a cross-sectional view of the anchor for ligament surgery inserted into a bone according to the embodiment of the present invention.
  • FIG. 4 is a side view of the anchor for ligament surgery according to the embodiment of the present invention.
  • the member When a member is referred to as being located "on" another member throughout the specification, the member may be in contact with the other member, and intervening members may be present therebetween.
  • a north-directed side may be the upper side
  • a north-directed part may be the upper end
  • south-directed side may be the lower side
  • a south-directed part may be the lower end.
  • the present invention relates to an anchor for ligament surgery.
  • the anchor 1 for ligament surgery according to the embodiment of the present invention (referred to simply as “the anchor for ligament surgery” hereinbelow) will be described in detail hereinbelow.
  • FIG. 1 is a perspective view of an anchor for ligament surgery slantingly shown from an upper side of the anchor;
  • FIG. 2 is a cross-sectional view of the anchor for ligament surgery equipped with a surgical drill bit, the anchor being taken along line III ⁇ III of FIG. 1;
  • FIG. 3 is a cross-sectional view of the anchor for ligament surgery inserted into a bone; and
  • FIG. 4 is a side view of the anchor for ligament surgery.
  • the anchor 1 is applied to arthroscopic surgery.
  • the arthroscopic surgery refers to a surgery performed using an instrument called an arthroscope, and includes surgeries related to a torn rotator cuff, a cartilaginous plate, a cruciate ligament, and an articular cartilage.
  • the anchor 1 can be applied to the arthroscopic surgery, and particularly, can be applied to the arthroscopic surgery related to the rotator cuff.
  • the anchor 1 for ligament surgery includes: a lower end part 11 provided with a first through hole 111 axially formed through the lower end part 11; a body part 13 positioned on an upper end of the lower end part 11 and provided with a second through hole 131 axially formed through the body part, the second through hole 131 communicating with the first through hole 111; and an upper end part 15 positioned on an upper end of the body part 13 and provided with a third through hole 151 axially formed through the upper end part, the third through hole 151 communicating with the second through hole 131.
  • the anchor 1 may be inserted into the bone 91, 92.
  • the insertion of the anchor 1 into the bone 91, 92 may be performed in the following way.
  • the surgical drill bit 5 is removably inserted into the first through hole 111, the second through hole 131, and the third through hole 151.
  • the surgical drill bit may be an awl, or a drill bit, etc., each of which has a pointed part at a free end thereof.
  • the surgical drill bit 5 while the surgical drill bit 5 is inserted into the anchor 1, the surgical drill bit 5 is inserted through epidermis into a bone of a human body, and thereby the anchor 1 into which the surgical drill bit 5 is inserted can be inserted into the bone.
  • the anchor 1 reaches predetermined positions to be inserted into the bone 91, 92, the surgical drill bit 5 can be removed from the anchor 1.
  • the surgical drill bit 5 is inserted into the anchor 1
  • the surgical drill bit 5 is inserted into the bone 91, 92
  • the process of surgery can be simplified, and the anchor 1 can be efficiently inserted into the bone 91, 92.
  • the first through hole 111 of the lower end part 11 may be provided with internal threads on an inner circumferential surface thereof.
  • the surgical drill bit 5 that is removably inserted into the first through hole 111, the second through hole 131, and the third through hole 151 may be provided with external threads on a portion of an outer circumferential surface thereof that contacts with the inner circumferential surface of the first through hole 111 when the surgical drill bit is inserted into the first through hole 111, the second through hole 131, and the third through hole 151, so that the external threads are engaged with the internal threads of the first through hole 111.
  • the surgical drill bit 5 can be efficiently inserted into and removed from the anchor 1 by engagement of the internal threads of the first through hole 111 with the external threads of the surgical drill bit 5.
  • the surgical drill bit 5 provided with the external threads being engaged with the internal threads of the first through hole 111 may be included in the anchor 1.
  • a width of the upper end part 15 may be larger than a width of the lower end part 11. This signifies that the width of the upper end part 15 is larger than a maximum width of the lower end part 11. Accordingly, when the anchor 1 is inserted into the bone 91, 92, the anchor can be press-fitted, and thus a combining force between the anchor 1 and the bone 91, 92 can be increased.
  • the upper end part 15 of the anchor 1 may include a suture hole 153.
  • the suture hole 153 may include two suture holes formed in directions perpendicular to an axial direction of the third through hole 151.
  • the two suture holes 153 may be opposed to each other.
  • the suture 7 may pass through the two suture holes 153.
  • the suture 7 may pass through the suture holes 153, and be combined with the suture holes 153. This is how the suture 7 may be combined with the anchor 1.
  • the anchor 1 can be inserted into the bone 91, 92 by the surgical drill bit 5. After the insertion of the anchor 1 into the bone 91, 92 is completed, the suture 7 can be combined with an injured ligament. Accordingly, the ligament combined with the suture 7 can be fixed to the bone 91, 92.
  • height and width of each of the suture holes 153 may have preset dimensions.
  • the preset dimensions of the height (referring to FIG. 3, a length of north-south direction) and the width (referring to FIG. 3, a length of east-west direction) refers to dimensions that allow the suture 7 to move in the suture holes 153.
  • the height and width of each of the suture holes 153 may be larger than a diameter of the suture 7.
  • the suture 7 in the suture hole 153 cannot move in each of the height and width directions of the suture hole 153 in the suture hole 153.
  • the suture hole 153 has height and width larger than the diameter of the suture 7, the suture hole 153 enables the suture 7 to move therein. Accordingly, during combination of the suture 7 with the ligament, movement of the suture 7 is efficient, and thus the suture and the ligament can be efficiently combined with each other.
  • a material of the anchor 1 includes polyetherethereketone (PEEK).
  • PEEK polyetherethereketone
  • the material of the lower end part 11, the body part 13, and the upper end part 15 includes PEEK.
  • PEEK is a thermoplastic resin that has high resistance to high temperature, impact, and wear, and is a new material that can be used for living tissues. Since PEEK is well known to those skilled in the art, a detailed description thereof will be omitted.
  • the anchor for ligament surgery of the related art was made of a material including titanium (Ti) to secure rigidity. Accordingly, the anchor of the related art caused metallosis and osteolysis.
  • the anchor 1 of the present invention is made of a material including PEEK, the anchor 1 can prevent metallosis and osteolysis, and realize biocompatibility.
  • a bone substitute 8 may be charged in the first through hole 111 and the second through hole 131.
  • the bone substitute 8 may be charged in the first through hole 111 and the second through hole 131.
  • the bone substitute 8 is charged in the inside of the anchor 1, thereby securing rigidity of the anchor 1.
  • the anchor 1 inserted into the bone 91, 92 may be damaged by an external force applied by a restored bone.
  • the anchor 1 allows the bone substitute 8 to be charged in the first through hole 111 and the second through hole 131, thereby securing the rigidity of the anchor 1.
  • the bone substitute 8 is preferred to be charged even in the third through hole 151 when necessary.
  • the body part 13 may include an exposure hole 133 formed in a direction perpendicular to an axial direction of the second through hole 131 such that an inside of the second through hole 131 communicates with an outside of the body part 13, thereby exposing the bone substitute 8 charged in the second through hole 131 to the outside of the body part.
  • the bone substitute 8 charged in the anchor 1 may be combined with the bone 91, 92 adjacent to the anchor 1 through the exposure hole 133. Accordingly, the combining force of the anchor 1 with the bone can be increased.
  • the bone substitute 8 may be hydroxyapatite.
  • Hydroxyapatite is ceramic having the same main components as a bone of human body, and is used for artificial bones and tooth roots. Additionally, hydroxyapatite is good in biocompatibility and thus can be integrated with tissues. Furthermore, hydroxyapatite is advantageous in that it has high adhesiveness to a bone.
  • the anchor 1 includes hydroxyapatite as the bone substitute 8, thereby increasing the combining force of the anchor 1 with the bone 91, 92, and increasing self-healing of the bone 91, 92.
  • the bone substitute 8 is not limited to hydroxyapatite, and may include at least one of an autogenous bone, a xenogenic bone, and an allogenic bone. Additionally, other artificial bones except for hydroxyapatite may be included as the bone substitute 8.
  • the body part 13 of the anchor 1 may be provided with a screw part 135 on an outer circumferential surface thereof.
  • the screw part 135 may be screwed to the bone 91, 92 adjacent to the anchor 1. Accordingly, the combining force of the anchor 1 with the bone 91, 92 can be increased.

Abstract

There is provided an anchor for ligament surgery including: a lower end part provided with a first through hole axially formed through the lower end part; a body part positioned on an upper end of the lower end part and provided with a second through hole axially formed through the body part, the second through hole communicating with the first through hole; and an upper end part positioned on an upper end of the body part and provided with a third through hole axially formed through the upper end part, the third through hole communicating with the second through hole, wherein a surgical drill bit provided with a pointed part on a free end thereof is removably inserted into the first through hole, the second through hole, and the third through hole.

Description

ANCHOR FOR LIGAMENT SURGERY
The present invention relates generally to an anchor for ligament surgery.
In general, a ligament is a tough fibrous tissue that connects bones to other bones, and since a ligament is normally located in a joint to keep the joint stable or to limit the mobility of the joint, the ligament may be damaged, namely, it may be distorted, twisted, torn, or disconnected.
The disconnection of the ligament usually occurs at a part where a ligament and a bone are connected to each other, and to reconstruct a damaged ligament, it is necessary to reattach the ligament to the bone. A widely-known method of fixing a ligament to a bone is to use a suture and an anchor. According to ligament reconstruction using the suture and the anchor, after the anchor is fixed to a bone, the suture connected to the anchor is connected to a ligament, and thereby the ligament is fixed to the bone.
In the related art, to insert the anchor into a bone, after a guide hole into which the anchor is inserted is formed in the bone using a surgical drill bit, the anchor is inserted into the guide hole. Accordingly, since the guide hole is formed using the surgical drill bit, the surgical drill bit is removed, and then the anchor is inserted into the guide hole, it is difficult to find the guide hole when inserting the anchor.
Accordingly, the present invention has been made keeping in mind the above problems occurring in the related art, and the present invention is intended to propose an anchor for ligament surgery, in which the anchor simplifies the process of surgery, and is efficiently inserted into an affected part that requires a surgical operation.
In order to achieve the above object, according to one aspect of the present invention, there is provided an anchor for ligament surgery applied to arthroscopic surgery, the anchor including: a lower end part provided with a first through hole axially formed through the lower end part; a body part positioned on an upper end of the lower end part and provided with a second through hole axially formed through the body part, the second through hole communicating with the first through hole; and an upper end part positioned on an upper end of the body part and provided with a third through hole axially formed through the upper end part, the third through hole communicating with the second through hole, wherein a surgical drill bit provided with a pointed part on a free end thereof is removably inserted into the first through hole, the second through hole, and the third through hole.
According to an embodiment of the present invention, a bone substitute may be charged in the first through hole and the second through hole.
According to the embodiment of the present invention, the body part may comprise an exposure hole formed in a direction perpendicular to an axial direction of the second through hole such that an inside of the second through hole communicates with an outside of the body part, thereby exposing the bone substitute charged in the second through hole to the outside of the body part.
According to the embodiment of the present invention, the first through hole may be provided with internal threads on an inner circumferential surface thereof.
According to the embodiment of the present invention, the surgical drill bit may be provided with external threads on a portion of an outer circumferential surface thereof that contacts with the inner circumferential surface of the first through hole when the surgical drill bit is inserted into the first through hole, the second through hole, and the third through hole, so that the external threads are engaged with the internal threads of the first through hole.
According to the embodiment of the present invention, a material of the lower end part, the body part, and the upper end part may include PEEK.
According to the embodiment of the present invention, a diameter of the upper end part may be larger than a diameter of the lower end part.
According to the embodiment of the present invention, the upper end part may be provided with two suture holes formed in directions perpendicular to an axial direction of the third through hole such that the suture holes are opposed to each other, and a suture may pass through the two suture holes.
According to the embodiment of the present invention, height and width of each of the suture holes may have preset dimensions that are set to allow the suture to move in the suture holes.
According to the embodiment of the present invention, the anchor for ligament surgery may be applied to a rotator cuff surgery.
According to the present invention having the above-described characteristics, it is possible to realize an anchor for ligament surgery, in which the anchor allows a surgical drill bit to be removably inserted into a first through hole, a second through hole, and a third through hole, and while the surgical drill bit is inserted into the anchor, the anchor is inserted into a bone, thereby allowing an efficient insertion into the bone, and simplifying the process of surgery. Particularly, the anchor according to the present invention does not require a step of finding a guide hole as in the related art, thereby significantly increasing efficiency of a surgery.
In addition, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor includes the first through hole and the second through hole in which a bone substitute is charged, thereby allowing rigidity to be obtained against an external force applied by a restored bone even after the surgical drill bit is removed from the first through hole, the second through hole, and a third through hole.
Furthermore, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor allows the bone substitute charged in the first through hole and the second through hole to adhere to a peripheral bone via an exposure hole so as to be combined with the peripheral bone, thereby increasing a combining force with the bone.
Additionally, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor includes internal threads on an inner circumferential surface of the first through hole, and the surgical drill bit having external threads with which the internal threads are engaged, thereby making engagement and disengagement with the surgical drill bit efficient.
In addition, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor includes a lower end part, a body part, and an upper end part that are made of materials including polyetherethereketone (PEEK), thereby preventing metallosis and osteolysis, and realizing biocompatibility.
Furthermore, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor includes the upper end part having a width larger than a width of the lower end part to be press-fitted into a bone, thereby increasing the combining force with the bone.
Additionally, according to the present invention, it is possible to realize an anchor for ligament surgery, in which the anchor allows a width and height of suture holes through which a suture passes to be preset so as to enable movement of the suture, and thus allows the suture to move during combination of the suture with a ligament, thereby enabling the suture to be efficiently combined with the ligament.
FIG. 1 is a perspective view of an anchor for ligament surgery slantingly shown from an upper side of the anchor according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the anchor for ligament surgery equipped with a surgical drill bit, the anchor being taken along line Ⅲ―Ⅲ of FIG. 1 according to the embodiment of the present invention;
FIG. 3 is a cross-sectional view of the anchor for ligament surgery inserted into a bone according to the embodiment of the present invention; and
FIG. 4 is a side view of the anchor for ligament surgery according to the embodiment of the present invention.
Reference will now be made in greater detail to an exemplary embodiment of the present invention, an example of which is illustrated in the accompanying drawings such that those skilled in the art can efficiently perform the embodiment of the present invention. However, the present invention is not limited to the embodiment thereof, but may be variously realized. Further, parts unrelated to descriptions of the present invention are omitted in the drawings so as to elucidate the present invention, and throughout the drawings, the same reference numerals will refer to the same or like parts.
It will be understood that when a part is referred to as being "coupled" to another part throughout the specification of the present invention, it may be directly coupled to the other part, or it may be "electrically coupled" to the other part with intervening elements present therebetween.
When a member is referred to as being located "on" another member throughout the specification, the member may be in contact with the other member, and intervening members may be present therebetween.
The statement that a part "includes" an element throughout the specification specifies that the part may further include, unless otherwise stated, other elements, not excluding other elements. Terms of degree, such as "about", "substantially", and the like are used herein in the sense of "at", or "nearly at", when given the manufacturing, design, and material tolerances inherent in the stated circumstances, and are used to prevent the unscrupulous infringer from unfairly taking advantage of the invention disclosure where exact or absolute figures are stated as an aid to understanding the invention. Terms of degree such as "a step of doing something" or "a step of something" used throughout the specification do not signify "a step for something".
For reference, terms (for example, an upper side, an upper end, a lower side, and a lower end) related to directions or positions in descriptions concerning the embodiment of the present invention are preset based on the state of arrangement of each of components shown in drawings. For example, referring to FIGS. 1 to 4, a north-directed side may be the upper side, a north-directed part may be the upper end, south-directed side may be the lower side, and a south-directed part may be the lower end.
The present invention relates to an anchor for ligament surgery.
The anchor 1 for ligament surgery according to the embodiment of the present invention (referred to simply as "the anchor for ligament surgery" hereinbelow) will be described in detail hereinbelow.
FIG. 1 is a perspective view of an anchor for ligament surgery slantingly shown from an upper side of the anchor; FIG. 2 is a cross-sectional view of the anchor for ligament surgery equipped with a surgical drill bit, the anchor being taken along line Ⅲ―Ⅲ of FIG. 1; FIG. 3 is a cross-sectional view of the anchor for ligament surgery inserted into a bone; and FIG. 4 is a side view of the anchor for ligament surgery.
The anchor 1 is applied to arthroscopic surgery. Here, the arthroscopic surgery refers to a surgery performed using an instrument called an arthroscope, and includes surgeries related to a torn rotator cuff, a cartilaginous plate, a cruciate ligament, and an articular cartilage. The anchor 1 can be applied to the arthroscopic surgery, and particularly, can be applied to the arthroscopic surgery related to the rotator cuff.
Hereinbelow, the anchor for ligament surgery applied to a ligament reconstruction surgery will be described in detail. In other words, hereinbelow, detailed descriptions will be made concerning the anchor for ligament surgery that allows a ligament to be reconstructed in such a manner that after the anchor 1 is inserted into a bone, a suture combined with the anchor is combined with the ligament.
Referring FIGS. 1 and 2, the anchor 1 for ligament surgery includes: a lower end part 11 provided with a first through hole 111 axially formed through the lower end part 11; a body part 13 positioned on an upper end of the lower end part 11 and provided with a second through hole 131 axially formed through the body part, the second through hole 131 communicating with the first through hole 111; and an upper end part 15 positioned on an upper end of the body part 13 and provided with a third through hole 151 axially formed through the upper end part, the third through hole 151 communicating with the second through hole 131.
Referring to FIG. 3, the anchor 1 may be inserted into the bone 91, 92. The insertion of the anchor 1 into the bone 91, 92 may be performed in the following way.
Referring to FIG. 2, the surgical drill bit 5 is removably inserted into the first through hole 111, the second through hole 131, and the third through hole 151. Here, the surgical drill bit may be an awl, or a drill bit, etc., each of which has a pointed part at a free end thereof.
Accordingly, as shown in FIG. 2, while the surgical drill bit 5 is inserted into the anchor 1, the surgical drill bit 5 is inserted through epidermis into a bone of a human body, and thereby the anchor 1 into which the surgical drill bit 5 is inserted can be inserted into the bone. When the anchor 1 reaches predetermined positions to be inserted into the bone 91, 92, the surgical drill bit 5 can be removed from the anchor 1.
In the related art, after a guide hole into which an anchor for ligament surgery is inserted is formed in a bone using a surgical drill bit, the anchor is inserted into the guide hole. Accordingly, since the guide hole is formed using the surgical drill bit, the surgical drill bit is removed, and then the anchor is inserted into the guide hole, it is difficult to find the guide hole when inserting the anchor.
However, according to the present invention, since while the surgical drill bit 5 is inserted into the anchor 1, the surgical drill bit 5 is inserted into the bone 91, 92, the process of surgery can be simplified, and the anchor 1 can be efficiently inserted into the bone 91, 92.
In addition, as shown in FIGS. 1 and 2, the first through hole 111 of the lower end part 11 may be provided with internal threads on an inner circumferential surface thereof.
Additionally, referring to FIG. 2, the surgical drill bit 5 that is removably inserted into the first through hole 111, the second through hole 131, and the third through hole 151 may be provided with external threads on a portion of an outer circumferential surface thereof that contacts with the inner circumferential surface of the first through hole 111 when the surgical drill bit is inserted into the first through hole 111, the second through hole 131, and the third through hole 151, so that the external threads are engaged with the internal threads of the first through hole 111.
The surgical drill bit 5 can be efficiently inserted into and removed from the anchor 1 by engagement of the internal threads of the first through hole 111 with the external threads of the surgical drill bit 5.
The surgical drill bit 5 provided with the external threads being engaged with the internal threads of the first through hole 111 may be included in the anchor 1.
In addition, referring to FIGS. 1 to 4, in the anchor 1 for ligament surgery, a width of the upper end part 15 may be larger than a width of the lower end part 11. This signifies that the width of the upper end part 15 is larger than a maximum width of the lower end part 11. Accordingly, when the anchor 1 is inserted into the bone 91, 92, the anchor can be press-fitted, and thus a combining force between the anchor 1 and the bone 91, 92 can be increased.
Furthermore, referring to FIGS. 1 and 3, the upper end part 15 of the anchor 1 may include a suture hole 153. As shown in FIG. 1, the suture hole 153 may include two suture holes formed in directions perpendicular to an axial direction of the third through hole 151. The two suture holes 153 may be opposed to each other.
As shown in FIG. 3, the suture 7 may pass through the two suture holes 153.
The suture 7 may pass through the suture holes 153, and be combined with the suture holes 153. This is how the suture 7 may be combined with the anchor 1.
For example, while the suture 7 is combined with the suture hole 153, the anchor 1 can be inserted into the bone 91, 92 by the surgical drill bit 5. After the insertion of the anchor 1 into the bone 91, 92 is completed, the suture 7 can be combined with an injured ligament. Accordingly, the ligament combined with the suture 7 can be fixed to the bone 91, 92.
In addition, height and width of each of the suture holes 153 may have preset dimensions. The preset dimensions of the height (referring to FIG. 3, a length of north-south direction) and the width (referring to FIG. 3, a length of east-west direction) refers to dimensions that allow the suture 7 to move in the suture holes 153. For example, as shown in FIG. 3, the height and width of each of the suture holes 153 may be larger than a diameter of the suture 7.
When the height and width of the suture hole 153 are equal to height and width of the suture 7, the suture 7 in the suture hole 153 cannot move in each of the height and width directions of the suture hole 153 in the suture hole 153. However, since the suture hole 153 has height and width larger than the diameter of the suture 7, the suture hole 153 enables the suture 7 to move therein. Accordingly, during combination of the suture 7 with the ligament, movement of the suture 7 is efficient, and thus the suture and the ligament can be efficiently combined with each other.
Furthermore, a material of the anchor 1 includes polyetherethereketone (PEEK). In other words, the material of the lower end part 11, the body part 13, and the upper end part 15 includes PEEK. PEEK is a thermoplastic resin that has high resistance to high temperature, impact, and wear, and is a new material that can be used for living tissues. Since PEEK is well known to those skilled in the art, a detailed description thereof will be omitted.
The anchor for ligament surgery of the related art was made of a material including titanium (Ti) to secure rigidity. Accordingly, the anchor of the related art caused metallosis and osteolysis. However, since the anchor 1 of the present invention is made of a material including PEEK, the anchor 1 can prevent metallosis and osteolysis, and realize biocompatibility.
Additionally, referring to FIG. 3, a bone substitute 8 may be charged in the first through hole 111 and the second through hole 131.
After the anchor 1 is inserted into the bone 91, 92, and the surgical drill bit 5 is removed from the anchor 1, the bone substitute 8 may be charged in the first through hole 111 and the second through hole 131. The bone substitute 8 is charged in the inside of the anchor 1, thereby securing rigidity of the anchor 1.
When the bone substitute 8 is not charged in the first through hole 111 and the second through hole 131 after removal of the surgical drill bit 5, the anchor 1 inserted into the bone 91, 92 may be damaged by an external force applied by a restored bone. However, after the removal of the surgical drill bit 5, the anchor 1 allows the bone substitute 8 to be charged in the first through hole 111 and the second through hole 131, thereby securing the rigidity of the anchor 1. For reference, to secure rigidity of the upper end part 15 of the anchor 1, the bone substitute 8 is preferred to be charged even in the third through hole 151 when necessary.
In addition, referring to FIGS. 1 and 2, the body part 13 may include an exposure hole 133 formed in a direction perpendicular to an axial direction of the second through hole 131 such that an inside of the second through hole 131 communicates with an outside of the body part 13, thereby exposing the bone substitute 8 charged in the second through hole 131 to the outside of the body part.
The bone substitute 8 charged in the anchor 1 may be combined with the bone 91, 92 adjacent to the anchor 1 through the exposure hole 133. Accordingly, the combining force of the anchor 1 with the bone can be increased.
For example, the bone substitute 8 may be hydroxyapatite. Hydroxyapatite is ceramic having the same main components as a bone of human body, and is used for artificial bones and tooth roots. Additionally, hydroxyapatite is good in biocompatibility and thus can be integrated with tissues. Furthermore, hydroxyapatite is advantageous in that it has high adhesiveness to a bone. The anchor 1 includes hydroxyapatite as the bone substitute 8, thereby increasing the combining force of the anchor 1 with the bone 91, 92, and increasing self-healing of the bone 91, 92.
However, the bone substitute 8 is not limited to hydroxyapatite, and may include at least one of an autogenous bone, a xenogenic bone, and an allogenic bone. Additionally, other artificial bones except for hydroxyapatite may be included as the bone substitute 8.
In addition, the body part 13 of the anchor 1 may be provided with a screw part 135 on an outer circumferential surface thereof. The screw part 135 may be screwed to the bone 91, 92 adjacent to the anchor 1. Accordingly, the combining force of the anchor 1 with the bone 91, 92 can be increased.
Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the present invention as disclosed in the accompanying claims. Thus, it is to be understood that the embodiment described above is for illustrative purposes, but is not intended to limit the present invention thereto. For example, each of components described in an integrated way may be separately described, and vice versa.
The present invention is intended to cover not only the exemplary embodiment, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit and scope of the present invention as defined by the appended claims.

Claims (8)

  1. An anchor for ligament surgery applied to arthroscopic surgery, the anchor comprising:
    a lower end part provided with a first through hole axially formed through the lower end part;
    a body part positioned on an upper end of the lower end part and provided with a second through hole axially formed through the body part, the second through hole communicating with the first through hole; and
    an upper end part positioned on an upper end of the body part and provided with a third through hole axially formed through the upper end part, the third through hole communicating with the second through hole,
    wherein a surgical drill bit provided with a pointed part on a free end thereof is removably inserted into the first through hole, the second through hole, and the third through hole.
  2. The anchor of claim 1, wherein a bone substitute is charged in the first through hole and the second through hole.
  3. The anchor of claim 2, wherein the body part comprises an exposure hole formed in a direction perpendicular to an axial direction of the second through hole such that an inside of the second through hole communicates with an outside of the body part, thereby exposing the bone substitute charged in the second through hole to the outside of the body part.
  4. The anchor of claim 1, wherein the first through hole is provided with internal threads on an inner circumferential surface thereof.
  5. The anchor of claim 4, wherein the surgical drill bit is provided with external threads on a portion of an outer circumferential surface thereof that contacts with the inner circumferential surface of the first through hole when the surgical drill bit is inserted into the first through hole, the second through hole, and the third through hole, so that the external threads are engaged with the internal threads of the first through hole.
  6. The anchor of claim 1, wherein a diameter of the upper end part is larger than a diameter of the lower end part.
  7. The anchor of claim 1, wherein the upper end part is provided with two suture holes formed in directions perpendicular to an axial direction of the third through hole such that the suture holes are opposed to each other, and
    a suture passes through the two suture holes.
  8. The anchor of claim 7, wherein height and width of each of the suture holes have preset dimensions that are set to allow the suture to move in the suture holes.
PCT/KR2016/008198 2016-02-15 2016-07-27 Anchor for ligament surgery WO2017142142A1 (en)

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