Implant for knee replacement

Patent metadata

Field	Value
Publication number	US-9301845-B2
Application number	US-45410906-A
Country	US
Kind code	B2
Filing date	Jun 15, 2006
Priority date	Jun 15, 2005
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

The present invention provides a system and method for gender specific medical treatment. The medical treatment system can include gender specific medical devices which are designed to account for the anatomical and physiological differences in the male and female genders. The medical treatment system can also include a medical device identification system which differentiates use for male and female patients. The medical device identification system includes a container adapted to receive a medical device and a gender specifier. The gender specifier is used to identify the gender the medical device in designed for. The gender specifier can be in text form, symbolic form, or color coded.

First claim

What is claimed is:

1. A method for providing prosthetic implants for a surgical procedure, the method comprising:
providing a first femoral component of a knee joint implant for the surgical procedure, the first femoral component designed, configured, and dimensioned for female anatomy, the first femoral component including a trochlear groove portion, a trochlear groove angle, a bearing surface having a maximum medial-lateral dimension, and a bone contacting surface having a maximum anterior-posterior dimension; and
providing a second femoral component of a knee joint implant for the surgical procedure, the second femoral component not specifically designed, configured, and dimensioned for female anatomy, the second femoral component including a trochlear groove portion, a trochlear groove angle, a bearing surface having a maximum medial-lateral dimension, and a bone contacting surface having a maximum anterior-posterior dimension,
wherein the maximum anterior-posterior dimension of the bone contacting surface of the first femoral component is the same as the maximum anterior-posterior dimension of the bone contacting surface of the second femoral component to enable the bone contacting surface of the first femoral component and the bone contacting surface of the second femoral component to be positioned on one prepared femur,
wherein the prepared femur comprises a distal portion of the femur that is cut to provide at least three implant contacting surfaces,
wherein the maximum medial-lateral dimension of the bearing surface of the first femoral component is smaller than the maximum medial-lateral dimension of the bearing surface of the second femoral component,
wherein the trochlear groove portion of the second femoral component is wider than the trochlear groove portion of the first femoral component, and
wherein the trochlear groove angle of the first femoral component is larger than the trochlear groove angle of the second femoral component.

2. The method of claim 1 , wherein the surgical procedure is a total knee replacement and each of the first and second femoral components is configured and dimensioned to replace at least a portion of the lateral and medial condyles of the knee.

3. The method of claim 2 , wherein the first femoral component includes an anterior flange having an anterior flange width and the second femoral component includes an anterior flange having an anterior flange width and wherein the anterior flange width of the second femoral component is wider than the anterior flange width of the first femoral component.

4. The method of claim 3 , wherein the first femoral component includes a lateral condyle portion and the second femoral component includes a lateral condyle portion and wherein the lateral condyle portion of the second femoral component is wider than the lateral condyle portion of the first femoral component.

5. The method of claim 4 , wherein the lateral condyle portion of the second femoral component is thicker than the lateral condyle portion of the first femoral component.

6. The method of claim 1 , wherein a bearing surface area of the second femoral component is greater than a bearing surface area of the first femoral component.

7. The method of claim 1 , wherein a modulus of elasticity of material of the first femoral component is greater than a modulus of elasticity of material of the second femoral component.

8. The method of claim 1 , wherein the first and second femoral components are not modular.

9. The method of claim 1 , further comprising:
providing a tibial component;
providing a cushioning material configured to couple to the tibial component and to correspond to the bearing surface of at least one of the first and second femoral components; and
providing a patella component configured to correspond to at least one of the first and second femoral components.

10. The method of claim 1 , wherein the first and second femoral components are configured to be implanted with bone cement.

11. The method of claim 1 , wherein the first and second femoral components include an ingrowth surface.

12. A system of prosthetic implants for a total knee replacement surgical procedure, the system comprising:
a first femoral component of a knee joint implant for the surgical procedure, the first femoral component including a lateral condyle portion, a trochlear groove portion, a bone contacting portion, and a trochlear groove angle; and
a second femoral component of a knee joint implant for the surgical procedure, the second femoral component including a lateral condyle portion, a trochlear groove portion, a bone contacting portion, and a trochlear groove angle,
wherein the first and second femoral components are not modular,
wherein the trochlear groove angle of the first femoral component differs from the trochlear groove angle of the second femoral component,
wherein the lateral condyle portion of the second femoral component is wider than the lateral condyle portion of the first femoral component, and
wherein the trochlear groove portion of the first femoral component is smaller than the trochlear groove portion of the second femoral component,
wherein the first and second femoral components are configured for implantation on one prepared femur, such that the bone contacting surface of the first femoral component and the bone contacting surface of the second femoral component have the same maximum anterior-posterior dimensions.

13. The system of claim 12 , wherein the trochlear groove angle of the first femoral component and trochlear groove angle of the second femoral component differ by more than five percent.

14. The system of claim 13 , wherein the trochlear groove angle of the first femoral component is greater than the trochlear groove angle of the second femoral component.

15. The system of claim 12 , wherein the prepared femur further comprises a distal portion of the femur that is cut to provide at least three implant contacting surfaces.

16. The system of claim 12 , further comprising:
a tibial component;
a cushioning material configured to couple to the tibial component and to correspond to the bearing surface of at least one of the first and second femoral components; and
a patella component configured to correspond to at least one of the first and second femoral components.

17. The system of claim 12 , wherein the first and second femoral components are configured to be implanted with bone cement.

18. The system of claim 12 , wherein the first and second femoral components include an ingrowth surface.

19. A method for providing prosthetic implants for a total knee replacement surgical procedure, the method comprising:
providing a first femoral component of a knee joint implant for the surgical procedure, the first femoral component including a maximum medial-lateral dimension and an anterior flange having an anterior flange width and a bone contacting surface having a maximum anterior-posterior dimension; and
providing a second femoral component of a knee joint implant for the surgical procedure, the second femoral component including a maximum medial-lateral dimension and an anterior flange having an anterior flange width and a bone contacting surface having a maximum anterior-posterior dimension,
wherein the maximum medial-lateral dimension of the first femoral component is smaller than the maximum medial-lateral dimension of the second femoral component,
wherein at least a portion of the first femoral component has less material than the second femoral component,

Assignees

• Bonutti Peter M
• P Tech Llc

Inventors

• Bonutti Peter M

Classifications

• A61F2002/30092

  using shape memory or superelastic materials, e.g. nitinol · CPC title

• A61F2002/305

  Snap connection · CPC title

• A61F2002/30975

  made of two halves · CPC title

• A61F2/0077

  Special surfaces of prostheses, e.g. for improving ingrowth (A61F2/30767 takes precedence) · CPC title

• A61F2/32

  for the hip · CPC title