Intermediate-term clinical and radiographic results of Synatomic and AGC knee prostheses.

This study compared two total knee prostheses to determine whether the clinical and radiographic outcomes were different, focusing primarily on the patellofemoral articulation. The study group was comprised of 75 Synatomic (short-stemmed, anatomic VF type) and 79 AGC 2000 (universal, nonanatomic) prostheses. Patients underwent follow-up for an average of 63 and 50 months, respectively. At latest follow-up, the mean knee joint score was 84.4 in the Synatomic and 86.5 in the AGC group. Mean knee function scores were 63.5 and 63.4, respectively. No statistically significant difference was noted between the two prostheses.

Survival of Lubinus straight (IP) and curved (SP) total hip prostheses in 543 patients after 4-13 years.

The clinical outcome and survival of 543 total hip arthroplasties with Lubinus cemented total hip prostheses after a mean of 7.9 years are reported. Clinical evaluation revealed no significant differences between patients with a straight stem and those with a curved anatomic stem. Loosening was statistically associated with young age, male sex, heavy weight, diagnosis other than osteoarthritis and year of operation. Survivorship analysis of the Lubinus IP implant at 8 years revealed a 95% chance of survival. The survival of the SP implant was 96%. After this time point the curve for SP implants began to fall at a faster rate than that for IP implants.

The clinical and radiological outcome of the rotating hinged knee prostheses in the long-term.

BACKGROUND AND AIMS: Opinions about hinged knee prostheses vary a lot in different studies. We wanted to examine our series in order to gain long-term information about this kind of knee prosthesis. MATERIAL AND METHODS: Forty-eight (18 Kinematic Hinge and 30 Link Endo Model) rotating hinged knee prostheses were implanted in the Hospital of Invalid Foundation. All knees were retrospectively followed up for an average of 66.3 months and examined for clinical or radiological factors indicating the overall outcome. RESULTS: In the latest review there were 10 patients (20.8%) regarded as having unsatisfactory and 35 patients (79.2%) satisfactory results. Eighty-four per cent of the patients were subjectively satisfied with the operation, mostly because of the painless result. CONCLUSIONS: Taking into account the very poor initial status of these patients, we recommend the rotating hinged prostheses still to be used in severely instable knees awaiting revision.

A five to seven years follow-up of 102 cementless Synatomic knee arthroplasties.

One hundred and two cementless Synatomic total knee prostheses were implanted in our hospital between January 1987 and October 1989. All knees were retrospectively followed up for five to seven years and examined for both pre- and postoperative clinical or radiological factors indicating aseptic loosening. The overall survival of the implants was 88.6%. The mean preoperative tibiofemoral angle of 178.5 degrees was found to be corrected immediately postoperatively to 183.4 and at the latest review to 182.3 degrees, with a slight shift towards varus which in the case of femoral component further increased during follow-up (P < 0.05). No correlation was found between tibiofemoral alignment and overall joint survival. Improvement of the preoperative marked (over 12 degrees) tibiofemoral valgus alignment correlated to clinical failure (P < 0.05). No such correlation was observed in pronounced varus knees (P = 0.897). A clear correlation was observed between the clinical outcome and the knee joint (P < 0.05) and function (P < 0.05) scores. Especially pain correlated closely with survival.

Clinical results and survival of cementless revisions after 49 to 93 months.

The results of 93 unselected consecutive cementless revision hip arthroplasties are reported. The patients' average age was 67 years, and the average follow-up was 62 months. The preoperative modified Merle d'Aubigne hip score averaged 9.7 (range 4-17) and the latest postoperative score was 13.7 (range 9-18). Twenty-five hips were rerevised and two await rerevision. Survivals of acetabular and femoral components at five years were 77 and 76% correspondingly. Radiographic examinations revealed migration in three acetabular components and seven femoral components (not yet rerevised). The results of the revisions with threaded acetabular components and with femoral components with madreporic or macrotextured surface were especially poor.

Clinical outcome and survival of Link RS total hip prosthesis.

We report the clinical outcome and survival of 100 total hip arthroplasties with Link RS cementless hip prostheses after a mean of 63 months (51 to 93). The average preoperative Merle d'Aubigné hip score was 9.4 points and the average score at the latest follow-up was 15.3 points. Thirteen prostheses have been revised and seven await revision. Survivorship analysis based on intention to revise showed only 68% survival at seven years (95% CI 53% to 81%). The survivals of femoral and acetabular components verified to be loose at surgery were 78% and 89% respectively at seven years. A number of other patients have pain and it seems likely that there will be substantial reduction in these survival figures in the future.

Long-term results of Smillie pin fixation of osteochondritis dissecans in the femoral condyles.

The purpose of this study was to determine the extent of secondary osteoarthritis after fixation of an osteochondritis dissecans fragment in the knee using Smillie pins as well as to assess the final outcome of the procedure. Eighteen patients treated for osteochondritis dissecans of the knee 10-34 years previously were re-evaluated clinically and radiologically. Moderate secondary osteoarthritis was noted in 35% of the patients, and clinically unsatisfactory result was seen in 44%. The remaining patients showed good or excellent clinical and radiological results at the follow-up.