Kış Hatice Cansu, Güleryüz Gürbulak Ayşegül
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Nuh Naci Yazgan University, Kayseri, Turkey.
Department of Prosthetic Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
Int J Implant Dent. 2020 Apr 1;6(1):13. doi: 10.1186/s40729-020-00209-7.
This study aimed to evaluate the microstructural changes in the peri-implant bone in patients with short implants in terms of implant survival status by using fractal analysis measurements.
Dental panoramic radiographs (DPRs) of 67 patients were examined and included in this study. Fractal analysis and measurement of the crown-implant ratio were performed with ImageJ. The fractal analysis measurement was performed on the DPRs obtained at preoperative (FD0) and in the follow-up periods (after 2 ± 2 weeks (FD1), 2 months ± 2 weeks (FD2), 6 months ± 2 weeks (FD3), and 12 months + (FD4)). A p value < 0.05 was considered statistically significant. Power analyses were conducted for the test results that did not reject null hypothesis. A significant difference was found in the FD1 and FD2 values between the implant survival groups (p < 0.001 and p = 0.023, respectively). The mean FD1 and FD2 values of the success group were significantly higher than those of the failure group.
Fractal analysis is a useful method to measure the trabecular microstructure of bone in non-standardized dental radiographs. The present study has a low power to reject the null hypothesis because of the low number of cases of implant failure. Therefore, further study with a large sample size is warranted. In clinical practice, the survival of implants may be predicted by analyzing fractal dimension of the surrounding trabecular bone of the implants.
本研究旨在通过分形分析测量，根据种植体存活状态评估短种植体患者种植体周围骨的微观结构变化。
对67例患者的牙科全景X线片（DPR）进行了检查并纳入本研究。使用ImageJ进行分形分析和冠种植体比率测量。在术前（FD0）以及随访期（2±2周后（FD1）、2个月±2周（FD2）、6个月±2周（FD3）和12个月及以后（FD4））获得的DPR上进行分形分析测量。p值<0.05被认为具有统计学意义。对未拒绝原假设的测试结果进行功效分析。在种植体存活组之间，FD1和FD2值存在显著差异（分别为p<0.001和p = 0.023）。成功组的平均FD1和FD2值显著高于失败组。
分形分析是测量非标准化牙科X线片中骨小梁微观结构的有用方法。由于种植体失败病例数较少，本研究拒绝原假设的功效较低。因此，有必要进行更大样本量的进一步研究。在临床实践中，可通过分析种植体周围骨小梁的分形维数来预测种植体的存活情况。
