Vargas-Belón Keyla, Chambilla-Torres Katya, Sánchez-Tito Marco
Private practice, Tacna, Peru.
Facultad de Ciencias de la Salud, Universidad Privada de Tacna, Tacna, Peru.
J Clin Exp Dent. 2022 Mar 1;14(3):e280-e284. doi: 10.4317/jced.59343. eCollection 2022 Mar.
To evaluate the marginal microleakage in single metal copings cemented with zinc phosphate, glass ionomer, and resin-modified ionomer.
An experimental in vitro study was carried out. The calculation of the sample was determined using the G*Power software; 15 premolars were considered per group. The teeth were carved considering a preparation with a chamfer-type shoulder with an angulation of 6°. Working models were obtained, where the metallic copings were made. Cementation was carried out with zinc phosphate (Prothoplast), glass ionomer (Ketac-Cem Easymix), and resin-modified ionomer (Relyx™ Luting 2) cements. The samples were immersed in 2% methylene blue solution for 24 hours. The microleakage measurement was carried out with a 40x stereo microscope at four measurement points (vestibular, lingual, mesial, and distal). In order to compare the microleakage values, the ANOVA test was carried out, followed by the Scheffé test. A significance level of 5% was adopted.
The zinc phosphate cement showed the highest values of marginal microfiltration (109.28 ± 51.27 µm) followed by the resin-modified ionomer cement (102.63 ± 45.07 µm) and the ionomer of glass (98.64 ± 39.18 µm), although these differences were not statistically significant (>0.05).
Zinc phosphate, glass ionomer, and resin-modified ionomer cements exhibited similar properties to prevent marginal microfiltration in unitary metal copings. Cementation, dental leakage, dental restoration failure.
评估用磷酸锌、玻璃离子体和树脂改性离子体粘结的单金属冠的边缘微渗漏情况。
进行了一项体外实验研究。使用G*Power软件确定样本量；每组考虑15颗前磨牙。制备牙齿时采用6°角的倒凹型肩台。制作工作模型，在其上制作金属冠。分别用磷酸锌（Prothoplast）、玻璃离子体（Ketac-Cem Easymix）和树脂改性离子体（Relyx™ Luting 2）粘结剂进行粘结。将样本浸入2%的亚甲蓝溶液中24小时。用40倍立体显微镜在四个测量点（唇侧、舌侧、近中、远中）进行微渗漏测量。为比较微渗漏值，进行方差分析，随后进行谢费检验。采用5%的显著性水平。
磷酸锌粘结剂的边缘微渗漏值最高（109.28±51.27µm），其次是树脂改性离子体粘结剂（102.63±45.07µm）和玻璃离子体（98.64±39.18µm），尽管这些差异无统计学意义（>0.05）。
磷酸锌、玻璃离子体和树脂改性离子体粘结剂在防止单一金属冠边缘微渗漏方面表现出相似的性能。粘结、牙齿渗漏、牙齿修复失败。
