Houshmand Behzad, Rezaei Esfahroodi Zeinab, Behnamghader Aliasghar, Mohammadreza Sadegh, Azizi Aytan, Ramezani Kave
Department of Periodontics, Faculty of Dentistry,Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Research Department of Nano-Technology and Advanced Materials, Karaj, Iran.
J Adv Periodontol Implant Dent. 2023 Sep 11;15(2):117-122. doi: 10.34172/japid.2023.015. eCollection 2023.
The success rate of dental implants diminishes over time; the lack of osseointegration and infection are the major causes of most implant failures. One of the effective methods to improve the surface properties is to irradiate ultraviolet (UV) light. This study investigated the effect of UV photofunctionalization on the ultrasuperficial properties of sandblasted, large-grit, acid-etched (SLA) titanium discs.
In this in vitro study, 24 sandblasted and acid-etched titanium discs, with a lifespan of more than four weeks, were categorized into three groups (n=8): control, ultraviolet C (UVC), and ultraviolet B (UVB). Then, they were exposed to a UV light source for 48 hours at a 1-cm distance. In addition to measuring the contact angle between the liquid and the disc surface in each of the three groups, the atomic concentrations of carbon, oxygen, and nitrogen atoms were measured at three different sites on each disc. One-way ANOVA and post hoc Tukey tests were used to analyze data.
The mean concentration of carbon atoms significantly differed in the control, UVC, and UVB groups (<0.001). The mean concentrations of nitrogen atoms differed significantly between the three groups (<0.001). However, the mean concentrations of oxygen atoms were not significantly different between the three groups. In examining the contact angle, wettability was higher in the UVC group than in the UVB group and higher in the UBV group than in the control group.
Photofunctionalization with UV light significantly decreased carbon and nitrogen concentrations on the surface of titanium implants, indicating that the implant's superficial hydrocarbons were eliminated. It was observed that UVC photofunctionalization was more effective than UVB photofunctionalization in reducing superficial contamination and improving wettability.
牙种植体的成功率会随着时间而降低；骨结合不足和感染是大多数种植失败的主要原因。改善表面性能的有效方法之一是照射紫外线（UV）。本研究调查了紫外线光功能化对喷砂、大颗粒、酸蚀（SLA）钛盘超表面性能的影响。
在这项体外研究中，将24个使用寿命超过四周的喷砂和酸蚀钛盘分为三组（n = 8）：对照组、紫外线C（UVC）组和紫外线B（UVB）组。然后，将它们在距离紫外线光源1厘米处暴露48小时。除了测量三组中每组液体与盘表面之间的接触角外，还在每个盘的三个不同位置测量碳、氧和氮原子的原子浓度。使用单因素方差分析和事后Tukey检验来分析数据。
对照组、UVC组和UVB组中碳原子的平均浓度存在显著差异（<0.001）。三组之间氮原子的平均浓度存在显著差异（<0.001）。然而，三组之间氧原子的平均浓度没有显著差异。在检查接触角时，UVC组的润湿性高于UVB组，UVB组高于对照组。
紫外线光功能化显著降低了钛种植体表面的碳和氮浓度，表明种植体表面的碳氢化合物被消除。观察到UVC光功能化在减少表面污染和改善润湿性方面比UVB光功能化更有效。
