Zyskind D, Zyskind K, Hirschfeld Z, Fuks A B
Department of Restorative Dentistry, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel.
Pediatr Dent. 1998 Jan-Feb;20(1):25-7.
The aim of the present study was to assess the microleakage of pit and fissure sealants in: 1) air-abraded molars with and without etching and 2) in preventive resin restorations (PRR) prepared with air abrasion or mechanically with a bur.
Forty molars with no or minimal occlusal caries were cleaned with pumice, washed, and assigned to four groups of 10 teeth each. In group A, the teeth were air-abraded and Helioseal was applied directly to the fissures without previous treatment. Group B was air-abraded and etched for 20 s prior to sealant application. In group C, caries was excavated with air abrasion, etched, and restored with Scotchbond Multipurpose, Z-100 and Helioseal. Group D was similar to C except that the fissures were prepared mechanically with a carbide bur at high speed.
Group A was significantly different in both Y1 and Y2 measurements from all the other groups. No differences were observed between all the other groups. Acid etching should be a precondition before sealant application. Air abrasion and mechanical preparation resulted in the same amount of microleakage following acid etch.
本研究的目的是评估窝沟封闭剂在以下情况中的微渗漏情况：1）经过和未经过酸蚀的气磨磨牙；2）用气磨或用牙钻机械制备的预防性树脂修复体（PRR）。
40颗无咬合龋或仅有轻微咬合龋的磨牙用浮石清洁、冲洗后，分为四组，每组10颗牙。A组牙齿用气磨处理，在未进行预处理的情况下直接将光固化窝沟封闭剂（Helioseal）应用于裂隙。B组先进行气磨，然后在应用封闭剂前酸蚀20秒。C组用气磨去除龋坏组织，酸蚀后用多功能粘结剂（Scotchbond Multipurpose）、Z-100和光固化窝沟封闭剂修复。D组与C组相似，只是裂隙用高速碳化钨牙钻机械制备。
A组在Y1和Y2测量中与所有其他组均有显著差异。其他所有组之间未观察到差异。酸蚀应作为应用封闭剂的前提条件。酸蚀后，气磨和机械制备导致的微渗漏量相同。
