The posterior cruciate condylar total knee prosthesis
AB - Between May 1975 and December 1979, 113 patients had 153 arthroplasties using a total condylar knee prosthesis. Thirty patients (forty-two knees) died, and one (two knees) was lost to follow-up. Thirty-eight of these forty-four knees had been followed for more than two years, and none had a revision. The remaining eighty-two patients (109 knees) were followed for an average of nine years (range, seven to 11.5 years). At the time of the latest examination, ten had had a revision for various rasons. For the ninety-nine knees that had the original prosthesis, the findings were compared with those of an evaluation that had been done four years postoperatively. The average over-all knee score was found to have decreased between the four-year and the latest follow-up evaluation, primarily because of a 7-point decrease in the score for function. The rate of infection was 0.6 per cent. The knees that had had patellar resurfacing had better over-all scores and better scores for pain than those that had not. This was particularly true in the patients who had osteoarthritis. The results of arthroplasty using a total condylar prosthesis appeared to be consistent and durable. Although there was a decrease in the quality of the functional result with increasing age, the patients reported consistent relief of pain.
Insall Burstein prosthesis : for total knee replacement
This paper reports a case of fatigue fracture of the femoral component in a cruciate-retaining cemented total knee arthroplasty (TKA). A 64-year-old man had undergone a primary TKA for osteoarthritis 10 years previously at another institution using the PFC-Sigma prosthesis. The patient recovered fully and was back to his regular activities. He presented with a history of sudden onset pain and locking of the left knee since the preceding three months. There was no history of trauma, and the patient was mobilizing with difficulty using crutches. Radiographs revealed fracture of the posterior condyle of the femoral prosthesis. Revision surgery was performed as an elective procedure revealing the broken prosthesis. The TC3RP-PFC revision prosthesis was used with a medial parapatellar approach. The patient recovered fully without any squeal. Mechanical failure of the knee arthroplasty prosthesis is rare, and nontraumatic fracture of the femoral metallic component has not been reported before.
Survivorship analysis, based on endpoints such as prosthesis removal for any cause or radiologic loosening (complete radiolucent line thicker than 1 mm, tilt, or subsidence of the component), showed a cumulative success rate of 96.2% at 13 years.
Figure C shows an example of an Walldius hinge total knee prosthesis
We conclude that the condylar constrained total knee prosthesis provides an acceptable solution for revision and complex primary total knee replacements at an intermediate follow-up term of 5 years.
Total Knee Arthroplasty 27447 | eORIF
In a KD prosthesis, the lengthening of the thigh and consequent shortening of the shank are related to the design characteristics of the knee joint. The selection of a knee joint for patients with KD is primarily based on –stability control during standing and walking and secondarily on cosmetic aspects . The exact extent of lengthening of the thigh and shortening of the shank in different types of knee joints and their anchors is, however, not known. In this study, an experimental setup was created to determine these characteristics in 18 commercially available KD knee joints and in a condylar knee joint constructed especially for cosmetic purposes (RIM-knee).
Unicompartmental Knee Arthroplasty 27446 | eORIF
Of the 16 knees that were revision total knee arthroplasties, 8 had a previous infected total knee arthroplasty, and 17 knees had severe deformities requiring, the use of the condylar constrained prosthesis.
HSS Hip & Knee Surgeon Dr. Jose A. Rodriguez
Our patient had a near-normal anatomic static alignment of the total knee prosthesis and was also not overweight and not obese. He was though very active and still in a full time job. Mariconda et al.  reported on acute breakage of the polyethylene tibial insert in a genesis total knee replacement with flexion of the total knee replacement leading to the development of a downward force on the polyethylene insert and shear force possibly causing the fracture.