Abstract
We treated severe bone defects and severe ligamentous instability of the knee by a modular system in total knee arthroplasty.
The patients were 4 men and 4 women. The primary diagnoses were osteoarthritis of the knee (4 knees), revision total knee arthroplasty (2 knees), steroid arthroplasty (1 knee), and osteoarthritis of the knee with medial condylar fracture of the femur (1 knee). Seven knees were repaired by Deltafit 7000 (Stryker) and one knee was repaired by Intercondylar knee (Manson).
The advantages of modular system in total knee arthroplasty were acquisition of the stability of the knee joint and reduction of rehabilitation hours. The disadvantages were the long duration times of the operation, due to its complicated methods, the appearance of the stress shielding, and the detrimental effects on the bone marrow.
Using the modular system in total knee arthroplasty might be most appropriate for knees with severe ligamentous instability and bone defects, and for osteoarthritic knees with intra-articular fractures or osteotomy.
