Instrumentation for proximal femoral compaction broaching

• US 5,899,907 A
• Filed: 10/17/1996
• Issued: 05/04/1999
• Est. Priority Date: 06/27/1991
• Status: Expired due to Fees

• Current Assignee: Lanny L. Johnson
• Original Assignee: Lanny L. Johnson
• Inventors: Johnson, Lanny L.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Shai, Daphna
• Application Number:
  US08/734,383
• Time in Patent Office: 929 Days
• Field of Search: 606/79, 606/80, 606/81, 606/83, 606/84, 606/85, 606/86
• US Class Current: 606/86.00R
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/8635 Tips of screws
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/885 Tools for expanding or compacting bones or discs or cavities therein A61B17/8805, A61B17/7097 take precedence
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity

Abstract

Instrumentation for preparing a femur for implantation of a prothesis therein, the femur including a femoral shaft having a femoral canal therein defined by sidewalls, the prosthesis being constructed and arranged to be received within the femoral canal, the instrumentation including: at least one initial compactor instrument having a proximal portion and a distal broach portion, the broach portion being adapted to conform substantially to a proximal end of the femoral canal so as to compact bone in the sidewalls thereof without intentionally removing bone from the femoral canal; a second type of compactor instrument having a proximal portion and a distal broach portion, the secondary compactor instrument portion being constructed and arranged to conform substantially to the shape of the prosthesis so as to further compact bone in the sidewalls of the proximal end of the femoral canal such that the compacted sidewalls conform substantially to the shape of the prosthesis; and a final type of compactor instrument having a proximal portion and an elongated distal broach portion, the elongated broach portion being adapted to extend into the femoral canal and compact bone in sidewalls of the femoral canal at a location distal to previously compacted sidewalls of the proximal end of the femoral canal.

Claims

1. A bone compaction instrumentation kit for compacting bone along a sidewall of a canal formed within a femoral shaft of a femur, the instrumentation kit comprising:

at least one initial compaction instrument having a proximal portion and a distal broach portion, said broach portion having an exterior compacting surface which, when the broach portion is inserted within the canal, compacts bone along the sidewall without intentionally removing bone from the canal;

at least one second compaction instrument having a proximal portion and a distal broach portion, said broach portion being differently sized and contoured relative to the first compaction instrument and having an exterior compacting surface which, when inserted within the canal, further compacts bone along the sidewall, and

at least one third compaction instrument having a proximal portion and a distal broach portion, said broach portion being differently sized and contoured relative to the first and second compaction instruments and having an exterior compacting surface which, when inserted into the canal further compacts bone along the sidewall.

2. A bone compaction instrumentation kit according to claim 1, wherein the broach portion of said initial compaction instrument has a length of approximately 70 mm, a maximum height of approximately 25 mm and a width in the range of approximately 2 to 4 mm.

3. A bone compaction instrumentation kit according to claim 1, wherein the broach portion of said second compaction instrument has a maximum height of approximately 25 mm and a width which tapers from approximately 10 mm to approximately 5 mm towards a distal end thereof.

4. A bone compaction instrumentation kit according to claim 1, wherein the broach portion of said third compaction instrument has a maximum height of approximately 25 mm, a width of approximately 10 mm and a length of approximately 70 mm, and wherein the broach portion of said third compaction instrument has an elongated portion with a length of approximately 90 mm, a height of approximately 9 mm and a width which tapers from approximately 10 mm at one end thereof to approximately 5 mm at a distal end thereof.

5. A bone compaction instrumentation kit according to claim 1, wherein said proximal portion of each compaction instrument includes a head formed so as to be impacted to drive the compaction instrument into the femoral canal.

6. A bone compaction instrumentation kit according to claim 1, wherein each compaction instrument is made of stainless steel.

7. A bone compaction instrumentation kit according to claim 1, wherein at least one of said initial compaction instrument, said second compaction instrument and said third compaction instrument comprises a plurality of instruments of different width.

8. A bone compaction instrumentation kit for compacting bone along substantially an entire internal wall of a cavity formed within the bone in preparation for receiving a medical device within the cavity, the instrumentation kit comprising:

a first compaction instrument having a proximal portion and a distal portion, said distal portion being configured and sized relative to the dimensions of said cavity whereby an exterior compacting surface of the instrument compacts bone along said internal wall when the distal portion of the first instrument is inserted within the cavity; and

at least two additional compaction instruments each having a proximal and a distal portion, said distal portion of the additional compaction instruments being differently sized and contoured relative to one another, and relative to the first compaction instrument, and having exterior compacting surfaces whereby after compaction of bone on the internal wall of the cavity by said first compaction instrument, insertion of successively larger distal portions of the respective additional compaction instruments into the cavity so as to bring the exterior compacting surfaces of the additional compaction instruments into engagement with said internal wall further compacts bone along said internal wall.

9. A bone compaction instrumentation kit according to claim 8, wherein said proximal portion of each compaction instrument includes a head formed so as to be impacted to drive the respective compaction instrument into the cavity.

10. A bone compaction instrumentation kit according to claim 8 or 9, wherein each compaction instrument is made of stainless steel.