The Asian size Exeter femoral stem fracture.

Abstract

The Exeter femoral stemwas in clinical use since 1970with good result [1]. The collarless, double tapered, polished design allows controlled subsidence of the femoral stem within the cement mantle. Adequate thickness of cement mantle is critical for the long-term success of Exeter femoral stem. However, the original design was aimed for Western population and stem oversizing was common in Asian population with small body build [2e4]. Smaller Asian size Exeter femoral stem was introduced to fit the Asian population. Smaller Asian size stems with 30 mm and 33mm offset have been made available since 1998. In view of the small size of the Asian stem, stem fracture is of concern. Herewe report a case of Asian size Exeter femoral stem fracture. Factors contributed to the stem fracture were discussed. Careful pre-operative planning and meticulous surgical technique should be employed when use of small stem. Biomechanical studies to define the weight limitation for the smaller Asian size Exeter femoral stem was recommended. The patient was informed that data concerning the case would be submitted for publication, and she consented.