Instrument assembly for lateral implant

• US 7,179,259 B1
• Filed: 06/04/2004
• Issued: 02/20/2007
• Est. Priority Date: 06/04/2004
• Status: Expired due to Fees

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Gibbs, Philip M
• Primary Examiner(s): Robert; Eduardo C.
• Assistant Examiner(s): SHAFFER, RICHARD R
• Application Number:
  US10/862,171
• Time in Patent Office: 991 Days
• Field of Search: 606/62, 606/64, 606 96- 99, 606/104, 623/22.12
• US Class Current: 606/64
• CPC Class Codes: A61B 17/1725 for applying transverse screws or pins through intramedullary nails or pins
• CPC Class Codes: A61B 17/1753 for fixing pins through femoral hip prostheses
• CPC Class Codes: A61B 17/742 having one or more longitudinal elements oriented along or parallel to the axis of the neck
• CPC Class Codes: A61B 17/744 the longitudinal elements coupled to an intramedullary nail
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61F 2/30739 Devices connected to the proximal part of an endoprosthetic femoral shaft for reinforcing or replacing the trochanters, e.g. the greater trochanter proximal parts of endoprosthetic femoral shafts A61F2/367; non-prosthetic trochanteric devices A61B17/74
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3676 Distal or diaphyseal parts of shafts
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30492 using a locking pin
• CPC Class Codes: A61F 2002/30507 : using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30708 : Means for distinguishing between left-sided and right-sided devices, Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3079 : Stepped or enlarged apertures, e.g. having discrete diameter changes
• CPC Class Codes: A61F 2002/30795 : Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/30803 : inclined obliquely
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/365 : Connections of heads to necks
• CPC Class Codes: A61F 2002/3652 : Connections of necks to shafts
• CPC Class Codes: A61F 2002/3674 : Connections of proximal parts to distal parts
• CPC Class Codes: A61F 2002/368 : with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
• CPC Class Codes: A61F 2002/3694 : with longitudinal bores
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2002/4662 : for measuring penetration depth
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2250/0084 : Means for distinguishing between left-sided and right-sided devices; Sets comprising both left-sided and right-sided prosthetic parts
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

An instrument assembly for inserting a lateral fastener into a lateral bore of a stem body implanted into a bone. The instrument assembly includes an outrigger having an alignment tube extending laterally from the stem body, wherein the outrigger can be coupled with the stem body such that the alignment tube extends coaxially with the lateral bore.

Claims

1. An assembly comprising:

a modular hip implant assembly for a hip joint including at least one stem body implantable into a femoral bone, the stem body having a longitudinal axis and a lateral bore at an angle to the longitudinal axis at a proximal end of the stem body;

at least one lateral fastener for insertion into the lateral bore;

an implantable support plate configured for attachment to a lateral surface of the femur with the at least one lateral fastener;

an instrument assembly for fastening the lateral fastener into the lateral bore of the stem body, the instrument assembly comprising;

an outrigger including a leg and a C-shaped arm defining a plane at an angle relative to the leg, the C-shaped arm having first, second and third portions, the first portion extending at an angle from a proximal end of the leg, the second portion extending between the first and third portions, the first portion substantially parallel to the third portion, the third portion couplable to the a proximal end of the stem body, such that the lea is substantially parallel to the longitudinal axis of the stem body, and the first, second and third portions define a lateral opening that is substantially parallel to the longitudinal axis of the stem body and configured to allow the abductor muscles of the femoral bone to pass therethrough between the implantable support plate and the femoral bone; and

an alignment tube extending from the leg such that the alignment tube is substantially coaxial with the lateral bore of the stem body.

2. The assembly of claim 1, wherein the outrigger is configured for selective use with an anterior incision on the left hip and a posterior incision on the right hip.

3. The assembly of claim 1, wherein the outrigger is configured for selective use with an anterior incision on the right hip and a posterior incision on the left hip.

4. The assembly of claim 1, further comprising a sleeve extending coaxially from the alignment tube between the leg and the support plate, the sleeve oriented transversely to the support plate, wherein the sleeve is configured to compress the support plate against soft tissue adjacent to a lateral side of the femur of the hip joint.

5. The assembly of claim 4, further comprising a removable depth rod receivable in the sleeve for sizing the lateral fastener.

6. The assembly of claim 5, further comprising a scale couplable to the depth rod.

7. The assembly of claim 6, further comprising at least one removable retainer rod for holding the support plate.

8. The assembly of claim 7, further comprising a cannulated drill.

9. The assembly of claim 1, wherein the first and second portions are perpendicular to the leg.

10. The assembly of claim 1, wherein the plane defined by the C-shaped arm is perpendicular to the leg.

11. The assembly of claim 1, wherein the support plate includes soft tissue fixation anchors.

12. The assembly of claim 1, wherein the support plate includes an opening for receiving the lateral fastener therethrough.

13. An assembly comprising:

a modular hip implant assembly for a hip joint including at least one stem body implantable into a femoral bone, the stem body having a longitudinal axis and a lateral bore at an angle to the longitudinal axis at a proximal end of the stem body;

at least one lateral fastener for insertion into the lateral bore;

an implantable support plate configured for attachment to a lateral surface of the femur with the at least one lateral fastener;

an instrument assembly for fastening the lateral fastener into the lateral bore of the stem body, the instrument assembly comprising;

an outrigger including a leg and a C-shaped arm defining a plane at an angle relative to the leg, the C-shaped arm having first, second and third portions, the first portion extending from a proximal end of the leg substantially perpendicular to the leg, the second portion extending between the first and third portions and at an angle relative to the first portion, the third portion couplable to the a proximal end of the stem body, such that the leg is substantially parallel to the longitudinal axis of the stem body and the third portion is substantially perpendicular to the leg, and the first, second and third portions define a lateral opening that is substantially parallel to the longitudinal axis of the stem body and configured to allow the abductor muscles of the femoral bone to pass therethrough between the implantable support plate and the femoral bone; and

an alignment tube extending from the leg, such that the alignment tube is substantially coaxial with the lateral bore of the stem body.

14. The assembly of claim 13, wherein the support plate includes an opening for receiving the lateral fastener therethrough.

15. An assembly comprising:

a modular hip implant assembly for a hip joint including at least one stem body implantable into a femoral bone, the stem body having a longitudinal axis and a lateral bore at an angle to the longitudinal axis at a proximal end of the stem body;

at least one lateral fastener insertable into the lateral bore of the stem body;

an implantable support plate having an opening and configured for attachment to a lateral surface of the femur with the at least one lateral fastener, the at least one fastener passing through the opening, the implantable support plate including anchors for soft tissue attachment;

an instrument assembly for fastening the lateral fastener into the lateral bore of the stem body, the instrument assembly comprising;

an outrigger including a leg and a substantially planar arm at an angle relative to the leg, the planar arm having first, second and third portions defining a C-shape, the first portion extending from a proximal end of the leg substantially perpendicular to the leg, the second portion extending between the first and third portions and at an angle relative to the first portion, the third portion substantially perpendicular to the leg and couplable to the a proximal end of the stem body, such that the leg is substantially parallel to the longitudinal axis of the stem body, and the first, second and third portions define an opening that is substantially parallel to the longitudinal axis of the stem body and laterally spaced away from stem body, the opening configured to allow the abductor muscles of the femoral bone to pass therethrough between the implantable support plate and the femoral bone; and

an alignment tube extending from the leg, such that the alignment tube is substantially coaxial with the lateral bore of the stem body.

16. The assembly kit of claim 15, wherein the alignment tube is an integral portion of the leg.