Patient-specific instrumentation for patellar resurfacing surgery and method
First Claim
1. A patient-specific jig for patellar resurfacing surgery comprising:
- a first jig portion defining at least one patient-specific contact surface negatively corresponding to a posterior surface of an anatomically patient-specific patella for complementary contact, and at least one drill guide in the first jig portion positioned relative to the at least one patient-specific contact surface to be configured to guide a tool defining an attachment bore in the posterior surface for a single-peg patellar implant, and another drill guide configured to secure a pin for securing the jig during resurfacing, the another drill guide being offset relative to the at least one drill guide and configured for a pin to be offset relative to the attachment bore in the patella; and
a second jig portion having a part projecting from only a portion of a periphery of the first jig portion, the part defining at least one cut guide positioned relative to the at least one patient-specific contact surface to be configured to guide a tool in resurfacing the patella to form a planned resurfacing plane for supporting the patellar implant.
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Accused Products
Abstract
A system for creating a patient-specific jig model for patellar resurfacing surgery comprises a patellar implant positioning module for obtaining a planned position of a patellar implant on a model of the patella, the model being anatomically patient-specific. A patella resurfacing calculator module calculates a position and/or orientation of a resurfacing plane and attachment bore in the patella as a function of the planned position of the patellar implant. A jig model generator module for generates and outputs a virtual jig model using the resurfacing plane and attachment bore of the patella and the model of the patella, the jig model comprising at least one patient-specific contact surface corresponding to a surface of the patella for complementary contact, at least one drill guide positioned relative to the at least one patient-specific contact surface to be configured to guide a tool defining the attachment bore for the patellar implant, and at least one cut guide positioned relative to the at least one patient-specific contact surface to be configured to guide a tool in resurfacing the patella to form the planned resurfacing plane.
303 Citations
12 Claims
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1. A patient-specific jig for patellar resurfacing surgery comprising:
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a first jig portion defining at least one patient-specific contact surface negatively corresponding to a posterior surface of an anatomically patient-specific patella for complementary contact, and at least one drill guide in the first jig portion positioned relative to the at least one patient-specific contact surface to be configured to guide a tool defining an attachment bore in the posterior surface for a single-peg patellar implant, and another drill guide configured to secure a pin for securing the jig during resurfacing, the another drill guide being offset relative to the at least one drill guide and configured for a pin to be offset relative to the attachment bore in the patella; and a second jig portion having a part projecting from only a portion of a periphery of the first jig portion, the part defining at least one cut guide positioned relative to the at least one patient-specific contact surface to be configured to guide a tool in resurfacing the patella to form a planned resurfacing plane for supporting the patellar implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification