Knee arthroplasty systems and methods

• US 10,512,471 B2
• Filed: 06/15/2017
• Issued: 12/24/2019
• Est. Priority Date: 03/02/2017
• Status: Active Grant

• Current Assignee: Optimotion Implants LLC
• Original Assignee: Optimotion Implants LLC
• Inventors: nguyen, Vuong binh, Justin, Daniel F., Koka, Dinesh V.
• Primary Examiner(s): Boles, Sameh R
• Application Number:
  US15/624,488
• Publication Number:
  US 20180250022A1
• Time in Patent Office: 922 Days
• 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 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/461 of knees
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30448 using adhesives
• CPC Class Codes: A61F 2002/30451 soldered or brazed or welded
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30818 : castellated or crenellated
• CPC Class Codes: A61F 2002/3084 : Nanostructures
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30845 : with cutting edges
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/3092 : having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30968 : Sintering
• CPC Class Codes: A61F 2002/3097 : using laser
• CPC Class Codes: A61F 2002/30985 : using three dimensional printing [3DP]
• 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
• CPC Class Codes: A61F 2310/00059 : Chromium or Cr-based alloys
• CPC Class Codes: A61F 2310/00383 : Gelatin
• CPC Class Codes: B22F 10/00 : Additive manufacturing of workpieces or articles from metallic powder apparatus or devices therefor B22F12/00
• CPC Class Codes: B22F 10/28 : Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• CPC Class Codes: B22F 2207/17 : density or porosity gradients
• CPC Class Codes: B22F 2998/10 : Processes characterised by the sequence of their steps
• CPC Class Codes: B22F 2999/00 : Aspects linked to processes or compositions used in powder metallurgy
• CPC Class Codes: B22F 3/11 : Making porous workpieces or articles
• CPC Class Codes: B22F 5/00 : Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• CPC Class Codes: B22F 7/062 : involving the connection or repairing of preformed parts
• CPC Class Codes: B22F 7/08 : with one or more parts not made from powder B22F7/062 takes precedence
• CPC Class Codes: B33Y 10/00 : Processes of additive manufacturing
• CPC Class Codes: B33Y 80/00 : Products made by additive manufacturing
• CPC Class Codes: Y02P 10/25 : Process efficiency

Abstract

A knee arthroplasty system may have a femoral joint prosthesis with a femoral bone engagement surface with an anterior portion, a posterior portion, and a distal portion that connects the anterior portion to the posterior portion. A first femoral anchoring member may protrude from the distal portion, and may be connected to the anterior portion with a primary femoral web. A tibial resection guide may have a base member and a guide member with a slot that guides a cutting blade to resect the tibial plateau. The guide member may slide along an arcuate path relative to the base member.

Claims

1. A tibial resection guide configured to facilitate resection of a tibia to prepare the tibia for attachment of a tibial prosthesis, the tibial resection guide comprising:

an anchoring assembly that secures the tibial resection guide to the tibia;

a base member;

a positioning assembly extending between the anchoring assembly and the base member to adjustably position the base member proximate a tibial plateau of the tibia; and

a guide member comprising a slot sized to receive a cutting blade configured to resect the tibial plateau;

wherein the guide member is movably coupled to the base member such that the guide member is movable along an arcuate path, relative to the base member, around the tibial plateau, wherein;

the base member comprises a base member attachment feature;

the guide member comprises a guide member attachment feature; and

the guide member attachment feature has a shape complementary to that of the base member attachment feature such that the guide member attachment feature and the base member attachment feature cooperate to slidably couple the guide member to the base member.

2. The tibial resection guide of claim 1, wherein:

one of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped protrusion extending along a first arcuate pathway;

the other of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped recess extending along a second arcuate pathway; and

the dovetail-shaped recess slidably receives the dovetail-shaped protrusion.

3. The tibial resection guide of claim 1, wherein the guide member comprises a plurality of apertures through which bone pins can be inserted into the tibia to retain the guide member relative to the tibia.

4. The tibial resection guide of claim 1, wherein the base member comprises two base member attachment features positioned proximate two opposing ends of the base member, wherein the positioning assembly is attachable to either of the base member attachment features.

5. The tibial resection guide of claim 1, further comprising a locking member movably coupled to at least one of the base member and the guide member;

wherein;

the locking member is actuatable between a locked configuration and an unlocked configuration;

with the locking member in the locked configuration, the guide member is fixedly secured to the base member; and

with the locking member in the unlocked configuration, the guide member is movable along the arcuate path, relative to the base member.

6. The tibial resection guide of claim 5, wherein:

with the locking member in the unlocked configuration, the guide member is movable from a first position to a second position, relative to the base member;

the locking member is actuatable to the locked configuration with the guide member in the first position to lock the guide member in the first position; and

the locking member is also actuatable to the locked configuration with the guide member in the second position to lock the guide member in the second position.

7. The tibial resection guide of claim 6, wherein:

with the locking member in the unlocked configuration, the guide member is further movable to a third position, relative to the base member; and

the locking member is further actuatable to the locked configuration with the guide member in the third position to lock the guide member in the third position.

8. The tibial resection guide of claim 7, wherein:

the locking member comprises a first locking post and a second locking post, each of which comprises a tip;

the base member comprises a first locking hole that receives the first locking post and a second locking hole that receives the second locking post;

the guide member comprises a plurality of receiving features comprising at least a first receiving feature and a second receiving feature;

in the locked configuration, with the guide member in the first position, the tip of the first locking post is received in the first receiving feature to restrict relative motion between the base member and the guide member, and the tip of the second locking post is received in the second receiving feature to further restrict relative motion between the base member and the guide member;

in the locked configuration, with the guide member in the second position, the tip of the first locking post is received one of the plurality of receiving features that is not the first receiving feature to restrict relative motion between the base member and the guide member;

in the locked configuration, with the guide member in the third position, the tip of the second locking post is received in one of the plurality of receiving features that is not the second receiving feature to restrict relative motion between the base member and the guide member; and

in the unlocked configuration, the first locking post and the second locking post are each retracted such that the tips are withdrawn from the plurality of receiving features to enable relative motion between the base member and the guide member.

9. The tibial resection guide of claim 5, wherein:

the locking member comprises a plurality of locking posts, each of which comprises a tip;

the base member comprises a plurality of locking holes, each of which receives one of the locking posts;

the guide member comprises a plurality of receiving features;

in the locked configuration, the locking posts extend fully through the locking holes such that the tips are received in the receiving features to restrict relative motion between the base member and the guide member; and

in the unlocked configuration, the locking posts are retracted such that the tips are withdrawn from the receiving features to enable relative motion between the base member and the guide member.

10. A tibial resection guide configured to facilitate resection of a tibia to prepare the tibia for attachment of a tibial prosthesis, the tibial resection guide comprising:

an anchoring assembly that secures the tibial resection guide to the tibia;

a base member;

a positioning assembly extending between the anchoring assembly and the base member to adjustably position the base member proximate a tibial plateau of the tibia; and

a guide member comprising a slot sized to receive a cutting blade configured to resect the tibial plateau;

wherein the guide member is movably coupled to the base member such that the guide member is movable along an arcuate path, relative to the base member, around the tibial plateau, wherein the base member comprises two base member attachment features positioned proximate two opposing ends of the base member, wherein the positioning assembly is attachable to either of the base member attachment features.

11. The tibial resection guide of claim 10, wherein:

the base member comprises a base member attachment feature;

the guide member comprises a guide member attachment feature; and

the guide member attachment feature has a shape complementary to that of the base member attachment feature such that the guide member attachment feature and the base member attachment feature cooperate to slidably couple the guide member to the base member.

12. The tibial resection guide of claim 11, wherein:

one of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped protrusion extending along a first arcuate pathway;

the other of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped recess extending along a second arcuate pathway; and

the dovetail-shaped recess slidably receives the dovetail-shaped protrusion.

13. The tibial resection guide of claim 10, further comprising a locking member movably coupled to at least one of the base member and the guide member;

wherein;

the locking member is actuatable between a locked configuration and an unlocked configuration;

with the locking member in the locked configuration, the guide member is fixedly secured to the base member;

with the locking member in the unlocked configuration, the guide member is movable along the arcuate path, relative to the base member;

the locking member comprises a plurality of locking posts, each of which comprises a tip;

the base member comprises a plurality of locking holes, each of which receives one of the locking posts;

the guide member comprises a plurality of receiving features;

in the locked configuration, the locking posts extend fully through the locking holes such that the tips are received in the receiving features to restrict relative motion between the base member and the guide member; and

in the unlocked configuration, the locking posts are retracted such that the tips are withdrawn from the receiving features to enable relative motion between the base member and the guide member.

14. The tibial resection guide of claim 10, further comprising a locking member movably coupled to at least one of the base member and the guide member;

wherein;

the locking member is actuatable between a locked configuration and an unlocked configuration;

with the locking member in the locked configuration, the guide member is fixedly secured to the base member;

with the locking member in the unlocked configuration, the guide member is movable along the arcuate path, relative to the base member;

with the locking member in the unlocked configuration, the guide member is movable from a first position to a second position, relative to the base member;

the locking member is actuatable to the locked configuration with the guide member in the first position to lock the guide member in the first position; and

the locking member is also actuatable to the locked configuration with the guide member in the second position to lock the guide member in the second position.

15. The tibial resection guide of claim 14, wherein:

with the locking member in the unlocked configuration, the guide member is further movable to a third position, relative to the base member; and

the locking member is further actuatable to the locked configuration with the guide member in the third position to lock the guide member in the third position.

16. A tibial resection guide configured to facilitate resection of a tibia to prepare the tibia for attachment of a tibial prosthesis, the tibial resection guide comprising:

an anchoring assembly that secures the tibial resection guide to the tibia;

a base member;

a positioning assembly extending between the anchoring assembly and the base member to adjustably position the base member proximate a tibial plateau of the tibia; and

a guide member comprising a slot sized to receive a cutting blade configured to resect the tibial plateau;

wherein the guide member is movably coupled to the base member such that the guide member is movable along an arcuate path, relative to the base member, around the tibial plateau, further comprising a locking member movably coupled to at least one of the base member and the guide member;

wherein;

the locking member is actuatable between a locked configuration and an unlocked configuration;

with the locking member in the locked configuration, the guide member is fixedly secured to the base member; and

with the locking member in the unlocked configuration, the guide member is movable along the arcuate path, relative to the base member, wherein;

the locking member comprises a plurality of locking posts, each of which comprises a tip;

the base member comprises a plurality of locking holes, each of which receives one of the locking posts;

the guide member comprises a plurality of receiving features;

in the locked configuration, the locking posts extend fully through the locking holes such that the tips are received in the receiving features to restrict relative motion between the base member and the guide member; and

in the unlocked configuration, the locking posts are retracted such that the tips are withdrawn from the receiving features to enable relative motion between the base member and the guide member.

17. The tibial resection guide of claim 16, wherein:

the base member comprises a base member attachment feature;

the guide member comprises a guide member attachment feature; and

the guide member attachment feature has a shape complementary to that of the base member attachment feature such that the guide member attachment feature and the base member attachment feature cooperate to slidably couple the guide member to the base member.

18. The tibial resection guide of claim 17, wherein:

one of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped protrusion extending along a first arcuate pathway;

the other of the base member attachment feature and the guide member attachment feature comprises a dovetail-shaped recess extending along a second arcuate pathway; and

the dovetail-shaped recess slidably receives the dovetail-shaped protrusion.

19. The tibial resection guide of claim 16, wherein:

with the locking member in the unlocked configuration, the guide member is movable from a first position to a second position, relative to the base member;

the locking member is actuatable to the locked configuration with the guide member in the first position to lock the guide member in the first position; and

the locking member is also actuatable to the locked configuration with the guide member in the second position to lock the guide member in the second position.

20. The tibial resection guide of claim 19, wherein:

with the locking member in the unlocked configuration, the guide member is further movable to a third position, relative to the base member; and

the locking member is further actuatable to the locked configuration with the guide member in the third position to lock the guide member in the third position.