Objective: To compare the difference in diameter of the medullary cavity of the humerus in Arab and South Asian patients in Kuwait. Subjects and Methods: In 46 patients (29 Arab, 17 South Asian) treated at Al-Razi Hospital, Kuwait, for diaphyseal fracture of the humerus, the medullary cavity of the humerus on the radiographs of the uninjured (contralateral side) was examined. Bone density was also measured. Statistical significance was calculated by parametric and nonparametric test using SPSS package. Results: South Asians had a significantly narrower medullary cavity (p < 0.05) and higher cortical indices (p < 0.05) than Arabs, and also a narrower external diameter of the humerus at levels 5 and 6 (p < 0.05). Conclusion: In cases of fracture of the humerus, radiographic measurements of the diameter of the medullary cavity of the uninjured side were essential in selecting the appropriate fixation device.

Objective: To present initial experience of the first 71 cases of cementless total hip replacement in Al Razi Hospital. Subject and Methods: Between 1996 and 2004, total hip replacement was performed in 71 patients (40 male, 31 female, average age 40.7 years, range 17–74) using Zweymüller cementless prosthesis. The patients were followed clinically and radiologically over an average period of 36 months (range 6–84). The results were assessed according to Merle d’Aubigne clinical score. Radiological assessment included position of the implant, behavior of the prosthesis/bone interface and signs of osteointegration. Results: Average clinical score during the 3 years’ follow-up period was 17.8 points. Most of the implants were in optimal positions. No significant radiological modifications of the implant-bone interface were observed. Conclusion: Zweymüller total hip prosthesis gives excellent clinical and radiological results in short-term follow-up.