Method of using a volar bone plate on a fracture
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/80
A61B-017/72
A61B-017/86
A61B-017/17
출원번호
US-0101786
(2013-12-10)
등록번호
US-9572609
(2017-02-21)
발명자
/ 주소
Orbay, Jorge L.
출원인 / 주소
Biomet C.V.
대리인 / 주소
Schwegman Lundberg & Woessner, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
165
초록
A volar fixation system includes a plate intended to be positioned against the volar side of the radial bone. The plate includes threaded holes for receiving fasteners which lock relative to the plate.
대표청구항▼
1. A method of stabilizing a fracture of a distal radius bone, the distal radius bone having subchondral bone that defines an articular surface with a concave curvature, the method comprising: a) providing or obtaining a rigid volar plate, the volar plate having a proximal body portion and a distal
1. A method of stabilizing a fracture of a distal radius bone, the distal radius bone having subchondral bone that defines an articular surface with a concave curvature, the method comprising: a) providing or obtaining a rigid volar plate, the volar plate having a proximal body portion and a distal head portion, each of the body portion and the head portion including a bone contacting first surface and an opposite second surface, the head portion angled upward with respect to a plane containing the body portion when the bone contacting first surface of the body portion is facing downward, the head portion including at least three first holes arranged in a generally medial to lateral direction, each of the at least three first holes defining a respective fixed central axis that is at a defined angle, each defined angle being at a different number of degrees from the other of the at least three first holes, wherein a first hole of the at least three first holes has a central axis that is oriented parallel to a line normal to a plane containing the head portion, a third hole of the at least three first holes has a central axis that is angled at 7 to 13 degrees relative to the central axis of the first of the at least three first holes, and a second hole of the at least three first holes has a central axis that is situated at an angle between an angle of the central axis of the first hole and an angle of the central axis of the third hole, and the body portion includes a plurality of second holes;b) positioning the bone contacting first surface of the body portion against the volar side of the radius bone;c) inserting at least one bone screw through at least one of the second holes and into the radius bone to secure the volar plate against the volar side of the radius bone;d) reducing the fracture;e) inserting each peg of a first plurality of pegs into a corresponding one of the at least three first holes in the head portion and into the volar side of the radius bone, each peg having a threaded head; andf) threadedly coupling the threaded head of each peg of the first plurality of pegs with the corresponding one of the at least three first holes of the head portion of the plate such that a shaft of each peg of the first plurality of pegs extends immediately below the subchondral bone of the radius bone and is axially fixed relative to the head portion of the plate, wherein the shaft of each peg of the first plurality of pegs extends divergently relative to the other pegs from the bone contacting first surface of the plate in both a medial-lateral direction and a proximal-distal direction, and wherein at least the at least three pegs and the head portion of the bone plate cooperate to form a stabilizing construct for the subchondral bone that conforms to the concave curvature of the articular surface. 2. The method according to claim 1, wherein: the second of the first holes is angled at 1 to 7 degrees relative to the first hole of the first holes. 3. The method according to claim 2, wherein: the first holes includes a fourth hole, the third hole located between the second hole and the fourth hole, and the fourth hole is angled at 10 to 20 degrees relative to the first hole of the first holes. 4. The method according to claim 1, further comprising: before inserting each peg of the first plurality of pegs, drilling into the radius bone to define bone holes for the shafts of each peg of the first plurality of pegs. 5. The method according to claim 4, wherein: the drilling is performed through a plurality of guide holes disposed in a guide plate situated above the second surface of the plate, each of the guide holes having a bore axis coaxial with a respective one of the fixed central axes. 6. The method according to claim 1, wherein: the volar plate includes four first holes. 7. A method of stabilizing a fracture of a distal radius bone, the distal radius bone having subchondral bone that defines an articular surface with a concave curvature, the method comprising: a) providing or obtaining a rigid volar plate, the volar plate having a proximal body portion and a distal head portion, each of the body portion and the head portion including a bone contacting first surface and an opposite second surface, the head portion angled upward with respect to a plane containing the body portion when the bone contacting first surface of the body portion is facing downward, the head portion including four first holes arranged in a generally medial to lateral direction, each of the four first holes defining a respective fixed central axis that is at a defined angle, each defined angle being at a different number of degrees from the other of the four first holes, wherein a first hole of the four first holes is oriented parallel to a line normal to a plane containing the head portion, a fourth hole of the four first holes is angled at 10 to 30 degrees relative to the first hole, and each of the second hole and third hole of is situated at an angle between an angle of the first hole and an angle of the fourth hole, and the body portion includes a plurality of second holes;b) positioning the bone contacting first surface of the body portion against the volar side of the radius bone;c) inserting at least one bone screw through the second holes and into the radius bone to secure the volar plate against the volar side of the radius bone;d) reducing the fracture;e) inserting each peg of a plurality of pegs through a corresponding one of the four first holes in the head portion and into the volar side of the radius bone, each peg having a threaded head; andf) threadedly coupling the threaded head of each peg of the plurality of pegs with the corresponding one of the four first holes in the head portion of the plate such that a shaft of each peg of the plurality of pegs extends immediately below the subchondral bone of the radius bone and is axially fixed relative to the head portion of the plate, wherein the shaft of each peg of the plurality of pegs extends divergently relative to the other pegs from the bone contacting first surface of the plate in both a medial-lateral direction and a proximal-distal direction, wherein at least the plurality of pegs and the bone plate and cooperate to form a stabilizing construct for the subchondral bone that conforms to the concave curvature of the articular surface. 8. The method according to claim 7, wherein: the second hole is angled at 1 to 7 degrees relative to the first hole. 9. The method according to claim 7, further comprising: before inserting the plurality of pegs, drilling into the radius bone to define bone holes for the shafts of the plurality of pegs. 10. The method according to claim 9, wherein: the drilling is performed through a plurality of guide holes disposed in a guide plate situated above the second surface of the plate, each of the guide holes having a bore axis coaxial with a respective one of the fixed central axes of the four first holes.
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