Introduction and Objectives: The success rate of bone allografts in the medium term when used in cancer surgery is 63% to 90% according to the different series. Our aim was to analyze the results and the complication rate seen in bone allografts as used in our center.

Materials and Methods: We collected follow-up data from 35 patients who received 37 allografts. The variables analyzed include diagnosis, age, bone and side affected, type of allograft, complications, additional surgery, time of follow-up, and allograft and patient survival.

Results: Mean age at surgery: 10.6 years. 48.64% were osteosarcomas, 48.64% were Ewing sarcomas, 2.7% were other diagnoses. 52.94% were strut grafts, 29.41% were osteoarticular, 2.94% were composite, 2.94% were arthrodesis and 11.76% were other types. Of these, 88.88% suffered some type of complication and 81. 48% required additional surgery. We achieved allograft survival in 85.29% of cases with a mean follow-up of 55.45 months. Most frequent complications were non-union (25%), postoperative metastasis (25%) length discrepancy (25%), followed by degenerative arthritis (24%) graft resorption and infection (16.6%)

Discussion and Conclusions: Allografts are a reconstructive option with good results in the medium term. In spite of the high complication rate, additional surgeries applying rescue procedures have made it possible to obtain allograft survival similar to that seen in published series.

Introduction and Objectives: There is more experience with the use of cemented models of knee prosthesis. However, non-cemented models are proving to have equivalent survival. Our aim was to analyze our experience of long term survival of non-cemented total knee replacement prosthesis.

Materials and Methods: We included the patients operated in our unit between 1989 and 1996. In all cases the same implant was used (LCS Total Knee Replacement, Depuy, Warsaw, IN). We included a total of 129 knees (117 patients). The variables we studied were: Age, sex, follow-up time, KSS score, implant survival and reasons for revision.

Results: Follow-up was 14.5 years and mean age was 78.7 years. A total of 60 knees did not complete the study correctly. For the 69 knees that remained in the study, the results were: 11 TKR (16%) were reoperated: 2 due to dissociation-dislocation of the patellar component, 3 due to wear or rupture of the tibial polyethylene, 6 were revised due to aseptic loosening. There were no cases of infection. The mean KSS score was 90.29.

Discussion and Conclusions: In our experience, the use of non-cemented TKR prosthesis:

Provides an excellent clinical and functional result, assessed by KSS.

If we include all reoperations, survival free of reintervention was 84%.