Amid Reza, Kadkhodazadeh Mahdi, Mojahedi Seyed Massoud, Gilvari Sarshari Maedeh, Zamani Zeinab
Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran.
Department of Laser, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
J Lasers Med Sci. 2021 Nov 6;12:e67. doi: 10.34172/jlms.2021.67. eCollection 2021.
Peri-implantitis is a common complication of dental implant treatment. A cause-and-effect relationship has been previously documented between microbial plaque and peri-implantitis and implant failure. A difference has been reported in the disinfection efficacy of erbium laser irradiation and air-flow abrasion for contaminated titanium surfaces. Also, the surface changes caused by lasers and air-flow abrasion have not been well studied. Thus, the purpose of this study was to compare the surface changes of contaminated titanium discs following decontamination by erbium-doped yttrium aluminum garnet (Er:YAG) laser irradiation and air-flow abrasion. Twenty-eight intact, sandblasted, and acid-etched (SLA) titanium discs were used. Twenty-four titanium discs were contaminated with . Then, they were decontaminated by using Er:YAG laser irradiation and air-flow abrasion. Four discs remained intact. The mean and standard deviation of the contact angle and the weight percentage of aluminum, titanium, oxygen, carbon, phosphorus, and calcium were measured. Qualitative changes in surface topography of titanium discs were assessed by scanning electron microscopy (SEM). The mean weight percentage of carbon in the air-flow abrasion group (4.98%) experienced a significant reduction compared with the contaminated (positive control) group (=0.035). The contact angles were 46.54° and 38.67° in the laser and air-flow abrasion groups respectively, which were significantly lower than the value in the positive control group (75.15°) ( ≤0.001). SEM micrographs showed no significant change in the surface area in either technique. Air-flow abrasion was more successful in improving the surface characteristics of titanium discs with no alteration in surface topography or elements, compared with Er:YAG laser irradiation. Further studies regarding the safety of the Er:YAG laser for the decontamination of titanium surfaces are recommended.
种植体周围炎是牙种植治疗中常见的并发症。先前已有文献记载微生物菌斑与种植体周围炎及种植体失败之间存在因果关系。据报道，铒激光照射和气流研磨对污染钛表面的消毒效果存在差异。此外，激光和气流研磨引起的表面变化尚未得到充分研究。因此，本研究的目的是比较掺铒钇铝石榴石（Er:YAG）激光照射和气流研磨去污后污染钛盘的表面变化。使用了28个完整的、经过喷砂和酸蚀（SLA）处理的钛盘。24个钛盘被[此处原文缺失污染物质相关内容]污染。然后，它们通过Er:YAG激光照射和气流研磨进行去污处理。4个盘保持完整。测量了接触角的平均值和标准差以及铝、钛、氧、碳、磷和钙的重量百分比。通过扫描电子显微镜（SEM）评估钛盘表面形貌的定性变化。气流研磨组中碳的平均重量百分比（4.98%）与污染（阳性对照）组相比有显著降低（P = 0.035）。激光组和气流研磨组的接触角分别为46.54°和38.67°，均显著低于阳性对照组的值（75.15°）（P≤0.001）。SEM显微照片显示两种技术在表面积方面均无显著变化。与Er:YAG激光照射相比，气流研磨在改善钛盘表面特性方面更成功，且表面形貌和元素均无改变。建议进一步研究Er:YAG激光对钛表面去污的安全性。
