REVISION TOTAL KNEE ARTHROPLASTY USING THE MODERN CONSTRAINED CONDYLAR KNEE PROSTHESIS

Area of Science:

• Orthopedic surgery
• Biomedical engineering

Background:

• Revision total knee arthroplasty (TKA) addresses failures in primary TKA.
• Aseptic loosening is a common indication for revision TKA.
• The second-generation constrained condylar prosthesis is designed for complex knee revisions.

Purpose of the Study:

• To evaluate the clinical outcomes of the second-generation constrained condylar prosthesis in revision TKA.
• To assess the efficacy of this prosthesis in improving knee function and alignment.

Main Methods:

• Retrospective review of 41 revision TKA cases using the second-generation constrained condylar prosthesis.
• Data collected included patient demographics, diagnosis, reason for revision, and follow-up duration.
• Clinical outcomes assessed using Knee Society scores, range of motion, and radiological alignment.

Main Results:

• Significant improvements observed in Knee Society knee scores (43.8 to 82.9) and function scores (37.1 to 79.2).
• Mean range of motion increased from 95.6° to 105.6° post-surgery.
• Radiological femorotibial alignment improved from varus to a near-neutral valgus alignment (p<0.001).

Conclusions:

• The second-generation constrained condylar knee prosthesis provides reproducible clinical success in revision TKA.
• This prosthesis is effective in improving functional outcomes and achieving satisfactory alignment.
• The study supports the use of this implant in revision knee arthroplasty settings.