Analysis of complications following total knee replacement with a cemented condylar endoprosthesis.

Background. Advanced knee arthritis is indicated for total alloplastic and it is considered to be the method of choice. It allows on abolishing of intensive pain and correcting of efficiency of limb. Material and methods. Postoperative complications were analysed in 109 operated knees in 93 patients. Condylar knee endoprotheses of types AGC I, AGC II, and Scorpio were implanted between 1996 and 2004. 92 implants were crucial retaining and 17 posterior stabilized. The age of the patients ranged from 39 to 84 years (mean 67.1). The follow-up period was from 10 months to 8 years and 3 months (mean 5 years and 2 months). 84 knees were operated in women and 25 in men. The HSS scale was used for evaluation of results. Results and Conclusions. From among the most important complications affecting the ultimate outcome, there were 3 early infections (2.7%), one late infectious complication (0.9%), one sterile destabilization of both elements (0.9%), and 2 cases (1.8%) of increasing, significant restriction of the range of movement. In 91 cases the outcome was very good or good, in 11 cases satisfactory, and in 7 cases poor.

[Significance of primary stabilization of the acetabular part of hip endoprosthesis in revision arthroplasty with extensive bone defects]. / Znaczenie pierwotnej stabilizacji panewki endoprotezy przy rozleglych ubytkach w artroplastykach rewizyjnych biodra.

In this article author discuss medium term results of first or next secondary replacement of acetabular part of hip endoprosthesis--after filling up cavernous or segmental bone defects. There were analysed 104 operated hips 70 (67.3%) female and 34 (32.7%) male. Bilateral hip arthroplasty (in two sessions) was performed in 14 women and 5 men. The average age was 69.8 years. The mean time between the primary arthroplasty and the revision was 12.1 years. The follow up was 2-15 years, mean 5.4 years. Cemented acetabulum was used in 71 revisions (68.3%), self-threaded in 19 (18.3%) and pressed in 14 (13.5%). Destabilization and migration of acetabular part of prosthesis appeared in 14 events (13.5%). Radiolucency local zones on X-ray referred to possible pseudomembrane round the acetabular part without clinical manifestations were shown in 19 cases (18.3%). The study demonstrated that migration of acetabular part of hip prosthesis due to secondary stabilisation deficiency took place in hips were proper primary stabilisation was not achieved because of extensive bone defects.