Results of a Second-Generation Constrained Condylar Prosthesis in Primary Total Knee Arthroplasty

Abstract This is a prospective study of the results of a second-generation modular constrained condylar knee (CCK) prosthesis in primary total knee arthroplasty. Of 418 consecutive total knee arthroplasties performed by 1 surgeon, a second-generation modular CCK prosthesis was indicated for intraope...

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Bibliographic Details
Published in:The Journal of arthroplasty 2011-12, Vol.26 (8), p.1228-1231
Main Authors: Lachiewicz, Paul F., MD, Soileau, Elizabeth S., BSN
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Arthritis, Rheumatoid - surgery
Arthropathy, Neurogenic - surgery
Arthroplasty, Replacement, Knee - instrumentation
constrained condylar
Female
Follow-Up Studies
Humans
Joint Deformities, Acquired - surgery
Joint Instability - surgery
Knee Joint - surgery
Knee Prosthesis
Male
Middle Aged
Orthopedics
Osteoarthritis, Knee - surgery
Prospective Studies
Prosthesis Design
total knee arthroplasty
Treatment Outcome
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Summary:Abstract This is a prospective study of the results of a second-generation modular constrained condylar knee (CCK) prosthesis in primary total knee arthroplasty. Of 418 consecutive total knee arthroplasties performed by 1 surgeon, a second-generation modular CCK prosthesis was indicated for intraoperative stability in 30 knees (7.2%). Three knees were lost to follow-up, and 27 knees had a mean follow-up time of 5.4 years (range, 2-11.5 years). All tibial components had a cemented 35-mm stem extension, and 26 femoral components had a 100-mm uncemented stem extension. The indication for use of the CCK components was most commonly severe valgus deformity and incompetent medial collateral ligament. There were no revisions for loosening, patella problems, or tibial post fracture. A lateral retinacular release of the patella was performed in 6 knees (22%). An asymptomatic, minimally displaced patella fracture was noted in 2 knees (7.4%). Constrained condylar knees are used infrequently now but are successful for the treatment of the unstable primary knee that cannot be balanced. These results may be design specific.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2011.05.010