Clinical Trial on the Zirconia Femoral Component for the Gem Total Knee System
Overview
- Phase
- Phase 2
- Intervention
- Not specified
- Conditions
- Knee Osteoarthritis
- Sponsor
- Kinamed Incorporated
- Enrollment
- 4
- Primary Endpoint
- Knee Score at 2 Years Post Operation
- Status
- Completed
- Last Updated
- 12 years ago
Overview
Brief Summary
The aim of this study is to provide evidence that the safety and effectiveness of the ceramic femoral component of the Gem Total Knee System is similar to FDA approved implants used in total knee replacement surgery. The hypotheses to be tested are that the investigational and control groups are equivalent in terms of patient success rate and complication-free rate.
Detailed Description
Due to excellent biocompatibility and wear characteristics, ceramics have a long history of success in total hip arthroplasty (THA). Use of a ceramic-polyethylene wear couple in total knee arthroplasty (TKA) has shown promising laboratory and early clinical results. The use of ceramics in this study is intended to address long-term failure of TKA due to osteolysis associated with polyethylene wear debris.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Skeletally mature
- •Primary TKA for osteoarthritis or post-traumatic arthritis of the knee joint
- •Stable or reconstructable collateral and posterior cruciate ligaments
- •Correctable deformity
- •Intact quadriceps and hamstrings mechanisms
- •Patella bone thick enough (at least 15 mm) after resection
Exclusion Criteria
- •Previous TKA
- •Bilateral knee arthritis
- •Non-availability for follow-up
- •Mental incompetence or confinement
- •Patients being treated with other investigational devices for same disorder
- •Infection
- •Osteoporosis, acute renal failure, or other disorders known to affect bone quality
- •Charcot's or Paget's disease
- •Patient physical condition preventing use of appropriate size implant
- •Disease conditions affecting blood supply to knee
Outcomes
Primary Outcomes
Knee Score at 2 Years Post Operation
Time Frame: within 2 years
The criterion used to assess the outcome is a Knee Score (as defined by Knee Society Clinical Rating System) \> 80 points at two-years follow-up. This scoring system is defined in the following paper: Insall JN, Dorr LD, Scott RD, and Scott WN (1989). Rationale of the Knee Society clinical rating system. Clin Orthop(248): 13-4. The scale ranges from minimum of 0 (worst) to maximum of 100 (best). Knee Score \> 80 was used as a criterion to assess "success".