Drinias Vassilis, Granström Gösta, Tjellström Anders
Department of Otolaryngology, Head and Neck Surgery, The Sahlgrenska Academy, Göteborg University, Göteborg, Sweden.
Clin Implant Dent Relat Res. 2007 Jun;9(2):94-9. doi: 10.1111/j.1708-8208.2007.00047.x.
The implant failure rate in temporal bone has been reported to be about 5 to 10% over a 10-year period. A number of our elderly patients have shown increased failure rates over a long time period, which is the reason for the present study.
The aim of the present study was to find out if age is correlated with implant failure and to measure blood flow in implant sites.
The long-time survival of 131 osseointegrated implants installed in the temporal bones of 81 patients was correlated with the age of the patient at the time of installation. The blood flow in 37 fixture installation sites in 22 patients was recorded by means of laser Doppler flowmetry.
The mean implant failure rate in the study group was 9.8% after a mean follow-up time of 7.6 years. There was a significant increase of implant failure in patients above 60 years of age. There was further a trend that implants used for the bone-anchored hearing aid were lost to a higher proportion than implants used for bone-anchored episthesis. There was also a trend that female patients lost fewer implants than males. Blood flow in the temporal bone correlated well with the age of the patient in that the highest values were recorded from the youngest patients.
Increasing age affects failures of osseointegrated implants in the temporal bone. Blood flow is higher in the child's temporal bone, a factor that can be of importance to understand why age influences implant survival.
据报道，颞骨植入物在10年期间的失败率约为5%至10%。我们的一些老年患者在较长时间内显示出较高的失败率，这就是本研究的原因。
本研究的目的是确定年龄是否与植入物失败相关，并测量植入部位的血流。
将81例患者颞骨中植入的131枚骨整合植入物的长期存活率与植入时患者的年龄相关联。通过激光多普勒血流仪记录22例患者37个种植体植入部位的血流情况。
研究组平均随访7.6年后，植入物平均失败率为9.8%。60岁以上患者的植入物失败率显著增加。此外，用于骨锚式助听器的植入物丢失比例高于用于骨锚式赝复体的植入物，存在这样一种趋势。还有一种趋势是女性患者丢失的植入物比男性少。颞骨血流与患者年龄密切相关，最年轻患者的血流值最高。
年龄增长会影响颞骨骨整合植入物的失败情况。儿童颞骨的血流较高，这一因素对于理解年龄为何影响植入物存活可能具有重要意义。
