The aim of this study was to evaluate the clinical and radiological outcome of the treatment of osteonecrosis of the femoral head by implantation of an osteonecrosis intervention rod. In this retrospective study the follow-up of 19 patients with 23 osteonecrotic femoral heads treated with implantation of an osteonecrosis intervention implant was assessed. From 19 patients with 23 necrotic femoral heads, there were 13 cases in which a total hip replacement was necessary. This implies a survival rate of 44% after implantation of an osteonecrosis intervention rod after a mean follow-up of 1.45 years. The outcome after core decompression combined with the insertion of a tantalum osteonecrosis intervention implant did not show superior results compared to core decompression alone. This is in contrast to existing studies. In addition, this study showed that in cases of total hip replacement, no problems appeared during explantation of the tantalum rod.

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Object Most upper cervical spine injuries are able to heal conservatively by halo vest application. The acceptance of the halo is different among patients due to the weight of the apparatus and the limited mobility it causes. Additionally, the fracture healing rate in older patients seems to be inferior to that in younger patients, which would make an operative stabilization procedure more appropriate for the elderly. Furthermore, the risk of complications is assumed to be higher in older people. The purpose of this retrospective study was to find out if there are differences in the clinical and radiological results and in complication rates between 2 patient groups with upper cervical spine injuries and halo vest treatment with special interest of their age group. Methods A total of 29 patients with upper cervical spine injuries were treated by halo vest application. The clinical and radiological results and the complication and revision surgery rates were identified. Patients were divided into 2 groups (18 patients were < 65 years and 11 were > 65 years), and the results were evaluated to examine whether there were any differences. Results The clinical and radiological results and the complication rate were not statistically significantly different between the 2 patient groups; however, there was a tendency for a longer time interval for fracture healing and more complications in the elderly people. Conclusions If the conditions for conservative treatment of upper cervical spine injuries with halo fixation are right, the clinical and radiological results are good and almost similar in patients regardless of their age, although there is a tendency for more complications in older people.