Cemented and cementless total Hip replacement. critical analysis and comparison of clinical and radiological results of 182 cases operated in Al Razi Hospital, Kuwait

In this study we present the results of a series of cemented Exeter and cementless Zweymuller implants. Subject and Methods: Eighty-seven cemented and 95 cementless hip replacements for different hip pathologies were followed for an average period of 36 months for cementless and 60 months for cemented cases. Clinical results were calculated using the Merle d'Aubigne score. The orientation of the prosthetic components and the fixation of the cup and stem were analyzed. The clinical and radiological results were compared using statistical methods. In the average period of 36 months in cementless and 60 months in cemented hip replacements the clinical results improved significantly when compared with the preoperative score [p < 0.05]. Sixty-seven cemented acetabular cups [77.1%] were in the desired position [30-50°] and 20 cemented cups [22.9%] were outside this range. Seventy-six cups [80%] were in the desired degree of abduction and 19 [20%] were outside this range. All cups except 1 were anteverted or neutral. Of the femoral stems, 173 were in the neutral position, 5 in the valgus and 4 in the varus position. Cemented cups were more commonly loose and cemented and cementless stems did equally well. No significant differences in rate of complications were found. Cementless acetabular implants had better clinical results and a lower loosening rate at 3 years of follow-up compared to cemented implants at 5 years of follow-up. The cemented femoral implants were equally stable compared to the cementless ones

Radioanatomical measurements of the medullary cavity of the humerus in Kuwait: ethnic differences and clinical implications for fracture fixation

To compare the difference in diameter of the medullary cavity of the humerus in Arab and South Asian patients in Kuwait. Subjects and 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. 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]. 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