论文信息 - A Case Report of Broken Kotz Modular System due to Metal Fatigue

A Case Report of Broken Kotz Modular System due to Metal Fatigue

We report a case of broken Kotz modular system due to metal fatigue. A 25 year-old woman suffered left knee dislocation 9 years after total knee arthroplasty with Kotz modular femur and tibia reconstruction (KMFTR) system for osteosarcoma of the left proximal tibia. Roentgenograms showed breakage of the housing part in the proximal tibial component. At revision surgery of the component, bearing bushes had worn off and the housing part had severed into several blocks. Electromicroscopic studies showed many irregular cracks in the severed anterior face. These findings demonstrated that breakage in the housing part of the prosthesis was due to metal fatigue.

[1] M. Malawer,et al. Prosthetic survival and clinical results with use of large-segment replacements in the treatment of high-grade bone sarcomas. , 1995, The Journal of bone and joint surgery. American volume.

[2] D. Campanacci,et al. Prosthetic reconstruction of the proximal femur after resection for bone tumors. , 1995, The Journal of arthroplasty.

[3] J. V. van Horn,et al. Kotz modular femur and tibia replacement. 28 tumor cases followed for 3 (1-8) years. , 1994, Acta orthopaedica Scandinavica.

[4] D. Campanacci,et al. Modular uncemented prosthetic reconstruction after resection of tumours of the distal femur. , 1994, The Journal of bone and joint surgery. British volume.

[5] P. Ruggieri,et al. Modular Kotz prosthesis: the Rizzoli experience , 1987 .