Department of Prosthodontics, Beijing Stomatological Hospital and School of Stomatology, Capital Medical University.
Department of Stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Peking Union Medical College Hospital.
Dent Mater J. 2023 Sep 29;42(5):669-675. doi: 10.4012/dmj.2022-259. Epub 2023 Jul 15.
Erbium:yttrium-aluminum-garnet (Er:YAG) laser debonding is a promising removal method in prosthodontics. This study aimed to assess Er:YAG laser energy transmission through novel zirconia ceramics. Five types of ceramic samples: lithium disilicate ceramic (LDC), self-glazed zirconia (SGZ), 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), 4Y-TZP and 5Y-TZP with 5 thicknesses (0.5, 1.0, 1.5, 2.0, 2.5 mm) and 2 shades (A1, A3), 50 specimens total, were made. Fourier transformation infrared absorption spectra were obtained for each ceramic type, and Er:YAG laser energy transmission tests were conducted for each specimen. The novel zirconia ceramic (SGZ, 4Y-TZP, 5Y-TZP) transmission ranged from 40%-60%. The transmitted laser energy decreased with increasing ceramic thickness, and the differences between different shades were significant (p<0.05). The novel zirconias had a higher translucency than 3Y-TZP at any given thickness and shade, and when the thickness was >1.5 mm, the novel zirconias had a higher translucency than LDC.
钇铝石榴石（Er:YAG）激光去粘接是一种很有前途的修复学去除方法。本研究旨在评估 Er:YAG 激光能量透过新型氧化锆陶瓷的传输情况。五种陶瓷样本：锂硅玻璃陶瓷（LDC）、自上釉氧化锆（SGZ）、3 摩尔氧化钇稳定四方氧化锆多晶（3Y-TZP）、4Y-TZP 和 5Y-TZP，每种材料各有 5 种厚度（0.5、1.0、1.5、2.0、2.5mm）和 2 种遮色瓷（A1、A3），总计 50 个样本。对每种陶瓷类型都进行了傅里叶变换红外吸收光谱分析，并对每个样本进行了 Er:YAG 激光能量传输测试。新型氧化锆陶瓷（SGZ、4Y-TZP、5Y-TZP）的透光率范围为 40%-60%。透过的激光能量随陶瓷厚度的增加而降低，不同遮色瓷之间的差异具有统计学意义（p<0.05）。在任何给定的厚度和遮色瓷下，新型氧化锆的透光率都高于 3Y-TZP，当厚度>1.5mm 时，新型氧化锆的透光率高于 LDC。
