Chan D C, Lemke K C, Howell M L, Barghi N
University of Texas Health Science Center, San Antonio 78284-7890, USA.
Oper Dent. 1996 Mar-Apr;21(2):63-8.
The effect of microabrasion on human enamel has been well documented; however, no information is available on its effect on dentin or restorative materials. The purpose of this study was to evaluate the effect of the microabrasion technique on the surface roughness of restorative materials and enamel and dentin surfaces. Flat disks of amalgam, composite resin, porcelain, and glass ionomer were evaluated. Labial enamel of three maxillary incisors and three molars that were flattened buccally to expose dentin were also tested. The Prema microabrasion compound was applied to each sample with a 10:1 gear-reduction, slow-speed handpiece for 5 seconds, then rinsed for 10 seconds. Roughness was determined with a profilometer. This procedure was repeated 20 times for each sample. A polyvinylsiloxane impression of the surface was taken after 0, 5, 10, 15, and 20 applications and examined under a scanning electron microscope. Enamel surface roughness did not improve as previously reported, suggesting that changes in optical characteristics may not be as important as removal of enamel in obtaining esthetic results. Dentin and glass ionomer exhibited an increase in roughness, such that their presence contraindicates the technique. Amalgam was essentially polished. Porcelain was most resistant to the effects of microabrasion. Judicious use of the technique, especially when restorative materials are present, is advised.
微磨损对人牙釉质的影响已有充分记录；然而，关于其对牙本质或修复材料的影响尚无相关信息。本研究的目的是评估微磨损技术对修复材料以及牙釉质和牙本质表面粗糙度的影响。对银汞合金、复合树脂、瓷器和玻璃离子水门汀的扁平圆盘进行了评估。还测试了三颗上颌切牙和三颗磨牙的唇面牙釉质，这些牙齿的颊面被磨平以暴露牙本质。使用带有10:1减速装置的低速手机将Prema微磨损复合物施加到每个样品上5秒，然后冲洗10秒。用轮廓仪测定粗糙度。每个样品重复此过程20次。在进行0、5、10、15和20次处理后，获取表面的聚乙烯基硅氧烷印模，并在扫描电子显微镜下检查。牙釉质表面粗糙度并未如先前报道的那样改善，这表明在获得美学效果方面，光学特性的改变可能不如牙釉质的去除重要。牙本质和玻璃离子水门汀的粗糙度增加，因此它们的存在表明该技术并不适用。银汞合金基本上被抛光。瓷器对微磨损的影响最具抵抗力。建议谨慎使用该技术，尤其是在存在修复材料的情况下。
