Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil.
Department of Surgery and Integrated Clinic, Division of Periodontics, Group for the Research and Study of Laser in Dentistry, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil.
J Indian Prosthodont Soc. 2021 Apr-Jun;21(2):125-137. doi: 10.4103/jips.jips_590_20.
This systematic review with meta-analysis aimed to evaluate the effect of the laser treatment on bond strength between Y-TZP and the resin cement or with the veneering ceramic, and the effect on the alteration of the Y-TZP surface roughness.
Systematic review and meta analysis following PROSPERO guidelines.
A comprehensive review was performed up to September 2020 on four databases (PubMed/MEDLINE, Embase, Scopus, and Cochrane Library), using the combination of keywords: "laser AND zirconia AND surface treatment AND bond strength".
The meta-analysis was based on the Mantel-Haenszel and inverse variance methods. The continuous outcome was evaluated by mean difference and the corresponding 95% confidence intervals.
A total of 37 studies were identified for the inclusion of data, with only in vitro studies. The types of laser reported in the studies were: Er:YAG, Nd:YAG, Er,Cr:YSGG, CO2, Femtosecond, and Yb lasers. A random-effect model found statistically significant differences between lasers and control groups of Y-TZP (P < 0.00001; MD: 3.08; 95% CI: 2.58 to 3.58). Only the bond strength with the Er:YAG laser did not present statistical difference (P = 0.51; MD: 0.22; 95% CI: -0.44-0.88). In another analysis, a random-effect model found a statistically significant difference between the laser and control groups on surface roughness (P < 0.00001; MD: 0.96; 95% CI: 0.86 to 1.06).
Laser irradiation is capable to improve the Y-TZP surface roughness and the bond strength of zirconia with resin cement and veneering ceramics. However, there is a lack of laser protocol for the zirconia surface, a fact that makes a simple and direct comparison difficult.
本系统评价和荟萃分析旨在评估激光处理对 Y-TZP 与树脂水门汀或饰面陶瓷之间粘结强度的影响，以及对 Y-TZP 表面粗糙度变化的影响。
遵循 PROSPERO 指南的系统评价和荟萃分析。
截至 2020 年 9 月，在四个数据库（PubMed/MEDLINE、Embase、Scopus 和 Cochrane Library）上进行了全面检索，使用关键词组合：“激光 AND 氧化锆 AND 表面处理 AND 粘结强度”。
荟萃分析基于 Mantel-Haenszel 和逆方差方法。连续结果通过均数差和相应的 95%置信区间进行评估。
共确定了 37 项研究纳入数据，均为体外研究。研究中报道的激光类型有：Er:YAG、Nd:YAG、Er,Cr:YSGG、CO2、飞秒和 Yb 激光。随机效应模型发现激光与 Y-TZP 对照组之间存在统计学显著差异（P < 0.00001；MD：3.08；95%CI：2.58 至 3.58）。只有 Er:YAG 激光的粘结强度没有统计学差异（P = 0.51；MD：0.22；95%CI：-0.44 至 0.88）。在另一项分析中，随机效应模型发现激光与对照组在表面粗糙度方面存在统计学显著差异（P < 0.00001；MD：0.96；95%CI：0.86 至 1.06）。
激光辐照能够提高 Y-TZP 的表面粗糙度和氧化锆与树脂水门汀及饰面陶瓷的粘结强度。然而，对于氧化锆表面，缺乏激光处理方案，这使得难以进行简单直接的比较。
