Faculty of Dentistry Department of Oral and Maxillofacial Surgery, Erciyes University, Kayseri, Turkey.
Faculty of Dentistry Department of Oral Maxillofacial Radiology, Erciyes University, Kayseri, Turkey.
Int J Implant Dent. 2021 Feb 25;7(1):14. doi: 10.1186/s40729-021-00296-0.
The present study aimed at evaluating the effectiveness of fractal analysis on determining the osseointegration of dental implants.
In a single center, retrospective clinical trial, patients with dental implants in the mandibular premolar/molar region, ASA I-II and < 65-year-old patients were included. Orthopantomograph (OPG) were taken before implant surgery (t0), within a week of surgery (t1), and 1 (t2) and 2 (t3) months after surgery, respectively. Three regions of interest (ROIs) from mesial, distal, and apical sites of the implants were chosen and fractal analysis (FA) was conducted with the box-counting algorithm using White and Rudolph's method.
A total of 39 patients 19 women and 20 men, with a mean age of 52.2 years (52.3 and 52.1 years, respectively) were included. The mean, minimum and maximum values of mesial (roi1), distal (roi2), and apical (roi3) surfaces were compared. The fractal dimension (FD) values of t1 were significantly lower compared with t0 as they decreased during the first week. FD values gradually increased after the first week although never exceeded the FD values of t0. Also, difference between mean FD values of t0 and t3 were found statistically significant (p < 0.05).
FA is a promising and noninvasive method to predict osseointegration of a dental implant based on dental radiographs, and it can help shorten the total treatment time.
本研究旨在评估分形分析在确定牙种植体骨整合中的有效性。
在单中心回顾性临床试验中，纳入下颌前磨牙/磨牙区、ASA I-II级和<65 岁的患者。在植入物手术前（t0）、手术后一周内（t1）、手术后 1 个月（t2）和 2 个月（t3）分别拍摄口腔全景片（OPG）。选择种植体近中、远中和根尖三个感兴趣区域（ROI），并使用 White 和 Rudolph 方法的盒计数算法进行分形分析（FA）。
共纳入 39 名患者（19 名女性和 20 名男性），平均年龄为 52.2 岁（分别为 52.3 和 52.1 岁）。比较了近中（roi1）、远中（roi2）和根尖（roi3）表面的平均值、最小值和最大值。与 t0 相比，t1 的分形维数（FD）值明显较低，因为它们在第一周内降低。FD 值在第一周后逐渐增加，但从未超过 t0 的 FD 值。此外，t0 和 t3 之间的平均 FD 值差异具有统计学意义（p<0.05）。
FA 是一种有前途的、非侵入性的方法，可以根据牙科射线照片预测牙种植体的骨整合，它可以帮助缩短总治疗时间。
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