Method and apparatus for less invasive knee resection

• US 7,837,690 B2
• Filed: 01/15/2003
• Issued: 11/23/2010
• Est. Priority Date: 01/15/2003
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Metzger, Robert
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/345,102
• Publication Number:
  US 20040138670A1
• Time in Patent Office: 2,869 Days
• Field of Search: 606/86, 606/87, 606/88, 606/89, 606/79, 606/82, 606/86.R, 835/83, 836/13
• US Class Current: 606/87
• CPC Class Codes: A61B 17/02 for holding wounds open; Tractors specula A61B1/32 ; drainage appliances for wounds A61M27/00
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia

Abstract

Various tools and portions are used to perform a resection of a portion of the anatomy for preparation of the implants of a prosthetic. Various saw blades having selected geometries and shapes can be used to assist in the resection of an anatomy to provide for implantation of a prosthetic. In addition, a cutting block assembly is provided wherein a cutting block is translatably mounted on a rail. The rail is fixed relative a portion of the anatomy. Therefore, once the rail is fixed, the cutting block can move to a selected position and held there without moving the rail.

Claims

1. A guide block assembly for use in assisting resecting a boney structure, the assembly comprising:

a track member to be fixed relative to the boney structure including;

a fixation section to fix said track member relative to the boney structure; and

a track translation section having a first end and a second end and a first dimension therebetween; and

a cutting block including;

at least two guiding sections each including a surface adapted to guide a cutting member; and

a guide translation section operable to engage said track translation section;

wherein said track translation section and said guide translation section operably interact to allow said cutting block to translate relative to said track member so that at least a portion of said cutting block is operable to translate a translation dimension greater than the first dimension and past at least one of the first end or the second end;

wherein said cutting member includes an elongated saw having a neck portion and a cutting head;

wherein said neck portion is operably engaged in one of said at least two guiding sections to guide said cutting head during use; and

wherein said neck portion is narrower than said cutting head such that the cutting member generally defines a “

T-Shape”

.

2. The guide block assembly of claim 1, wherein the track translation section includes a longitudinal length that defines an entire path of the cutting block;

wherein the cutting block is operable to be selectively positioned in a first position to make a first cut and operable to be selectively positioned in a second position to make a second cut while the track member remains in a single position, wherein the first position and the second position allow at least a portion of the at least two guiding sections to extend beyond the track translation section.

3. The guide block assembly of claim 2, wherein at least one of the first position, the second position, or combinations thereof positions at least one of the two guiding sections beyond a boundary of the track member.

4. The guide block assembly of claim 1, wherein said fixation section includes a member extending from said track member adapted to be inserted into the boney structure.

5. The guide block assembly of claim 1, wherein said track translation section includes at least one of a male dovetail, a male “

T”

, or combinations thereof extending from said track member.

6. The guide block assembly of claim 1 wherein the at least two guiding sections of the cutting block have a second longitudinal dimension;

wherein the translation dimension is greater than a sum of the first dimension and the second dimension.

7. The guide block assembly of claim 1, wherein said guiding section defines a bore extending through said cutting block and displaced a distance away from said track member, wherein the guiding section and the track member are not coplanar, such that said cutting member is guided away from said track member to resect the boney structure.

8. The guide block assembly of claim 1, wherein:

said track translation section is selected from one of a slot or a rail;

said guide translation section is selected from the other of said slot or said rail.

9. The guide block assembly of claim 1, further comprising:

a locking member;

wherein said track member further includes locking portions operable to be selectively engaged by said locking member;

wherein said cutting block is fixed relative to said track member when said locking member is engaged in at least one of said locking portions.

10. The guide block assembly of claim 1, wherein said track translation section is selected to be either formed integrally with said track member, formed integrally with said cutting block, operably affixed to said track member, or operably affixed to said cutting block and

wherein said guide translation section is selected to be either formed integrally with said track member, formed integrally with said cutting block, operably affixed to said track member, or operably affixed to said cutting block.

11. The guide block assembly of claim 1, wherein said guiding section defines a second dimension, wherein the interaction of the track translation section and said guide translation section allows the guiding section to traverse a dimension greater than with the first dimension or the second dimension.

12. The guide block assembly of claim 1, wherein the first dimension is a complete longitudinal length of the track translation section.

13. The guide block assembly of claim 1, wherein the two guiding sections are positioned at an angle relative to one another that is greater or less than 90 degrees.

14. The guide block assembly of claim 1,

wherein the track translation section defines only a single elongated member having a first longitudinal edge and a second longitudinal edge;

wherein the cutting block includes a first block edge extending beyond the first longitudinal edge and a second block edge extending beyond the second longitudinal edge;

wherein a first guiding section of the at least two guiding sections is displaced a distance from both of the first longitudinal edge and the second longitudinal edge and a second guiding section of the at least two guiding sections is displaced a distance from both of the first longitudinal edge and the second longitudinal edge.

15. A guide block assembly for use in assisting a resection of a boney structure, the assembly comprising:

a track member to be held relative to the boney structure having a track translation section having a total length;

a cutting block defining a guide section to guide a cutting member; and

a guide translation section to engage said track translation section;

wherein the guide section defines a slot that includes a first surface and a second surface operable to bound the cutting member;

wherein said track translation section and said guide translation section interact to allow said cutting block to translate relative to said track member so that the guide section is operable to traverse a length greater than the total length.

16. The assembly of claim 15, wherein the cutting block is selectively moveable between a first position to make a first cut and a second position to make a second cut while the track member remains in a single position.

17. The assembly of claim 15, further comprising:

a fixation member to selectively fix said track member to the boney structure.

18. The assembly of claim 15, wherein said cutting block defines an outer edge and said guide section has a fixed surface that defines an angle relative to said outer edge.

19. The assembly of claim 15, wherein said guide section is operable to form an anterior chamfer cut and a posterior chamfer cut on the boney structure.

20. The assembly of claim 15, wherein said cutting block is moveable relative to the track member with the cutting member.

21. The assembly of claim 15, wherein the track member includes a terminal end;

wherein at least a portion of the guide section is operable to pass the terminal end of the track translation section extending the total length.

22. The assembly of claim 15, wherein the guide section includes a guide surface that defines a guide area that defines a dimension greater than the total length.

23. The guide block assembly of claim 15, wherein the track translation section includes a translation axis that defines a path that extends a total length of the track member;

wherein the cutting block defines a guide surface;

wherein the cutting block is operable to move along the path so that the guide surface extends further than the total length.

24. The assembly of claim 15, wherein the first surface and the second surface define an area through which the cutting member is operable to pass before the cutting member engages the boney surface.

25. The assembly of claim 15, wherein the cutting member includes a cutting head portion defining a total cutting surface of the cutting member having a first width greater than a second width of a portion extending from the cutting head;

wherein the cutting member generally defines a “

T-shaped”

cutting member.

26. A guide block assembly for use in assisting a resection of a boney structure, the assembly comprising:

a track member to be held relative to the boney structure having a track translation section;

a cutting block moveable relative to the track member defining a first guide section extending along a first axis and a second guide section extending along a second axis at a non-zero angle relative to the first axis to guide a cutting member wherein the first guide section, the second guide section, or combinations thereof is defined by a slot; and

a guide translation section to engage said track translation section;

wherein at least one of the first guide section, the second guide section, or combinations thereof is operable to extend a distance beyond the track translation section.

27. The assembly of claim 26, further comprising:

a guide surface that is defined by no more than a single edge of said cutting block.

28. The assembly of claim 26, wherein said cutting block is dimensioned smaller than said track member.

29. The assembly of claim 26, wherein said guide section includes a slot defined through said cutting block.

30. The guide block assembly of claim 26, wherein the track member has a total distance defined by two ends of the track member and at least a portion of the cutting block is operable to translate a distance greater than the total distance.

31. The guide block assembly of claim 30, wherein the two ends are terminal ends of the track member.

32. The guide block assembly of claim 26, wherein the first guide section and the second guide section are angled so that the first axis and the second axis intersect on only one side of the track member.

33. The assembly of claim 26, wherein the non-zero angle is an angle less than 90 degrees or greater than 90 degrees.

34. A cutting member guide assembly for use in assisting in a resection of a boney structure with a cutting member, the assembly comprising:

a track member defined by a first end and a second end to be held relative to the boney structure having a track translation section having a first dimension along a longitudinal axis of the track member and extending from the first end to the second end;

a cutting block defining an internal guide section to guide a cutting member at a fixed non-zero angle relative to an outer edge of the cutting block; and

a guide translation section to engage said track translation section;

wherein said track translation section and said guide translation section interact to allow said cutting block to translate relative to said track member so that the guide section is operable to traverse a dimension greater than the first dimension.

35. The assembly of claim 34, wherein the first dimension is a linear dimension.

36. The assembly of claim 34, wherein the guide section is defined by at least a first surface and a second surface substantially defining a slot through which the cutting member is operable to pass.

37. The assembly of claim 34, wherein the cutting member includes a cutting head portion defining a total cutting surface of the cutting member having a first width greater than a second width of a portion extending from the cutting head;

wherein the cutting member generally defines a “

T-shaped”

cutting member.

38. The assembly of claim 34, wherein the track translation section defines only a single substantially straight path of translation;

wherein the guide translation section substantially restricts a movement of the cutting block along the path;

wherein the guide section defines a slot operable to allow the cutting member to pass through the slot to engage the boney structure substantially only along the path.

39. A guide block assembly for use in assisting resecting a boney structure, the assembly comprising:

a track member to be fixed relative to the boney structure including;

a fixation section to fix said track member relative to the boney structure; and

a track translation section having a first end and a second end and a first dimension therebetween; and

a cutting block including;

at least two guiding sections each including a surface adapted to guide a cutting member wherein the two guiding sections are positioned at an angle relative to one another that is greater or less than 90 degrees; and

a guide translation section operable to engage said track translation section;

wherein said track translation section and said guide translation section operably interact to allow said cutting block to translate relative to said track member so that at least a portion of said cutting block is operable to translate a translation dimension greater than the first dimension and past at least one of the first end or the second end.

40. A guide block assembly for use in assisting a resection of a boney structure, the assembly comprising:

a track member to be held relative to the boney structure having a track translation section;

a cutting block moveable relative to the track member defining a first guide section extending along a first axis and a second guide section extending along a second axis at a non-zero angle relative to the first axis to guide a cutting member, wherein the non-zero angle is an angle less than 90 degrees or greater than 90 degrees; and

a guide translation section to engage said track translation section;

wherein at least one of the first guide section, the second guide section, or combinations thereof is operable to extend a distance beyond the track translation section.