Agger M S, Hörsted-Bindslev P, Hovgaard O
Department of Dental Pathology, Operative Dentistry, and Endodontics, Royal Dental College, Faculty of Health Sciences, University of Aarhus, Vennelyst Boulevard 9, DK 8000 Aarhus C, Denmark.
Quintessence Int. 2001 May;32(5):407-11.
The purpose of this study was to evaluate the abrasiveness of a new air polisher on root surfaces.
Fifty extracted human teeth were air polished for 5 seconds.
All root surfaces showed a circular defect visible with the naked eye. Scanning electron microscope examination showed smooth crater walls and a few open dentin tubules, but most seemed to be obliterated. Laser profilometry of the exposed areas revealed defects with an average depth of 484 microns, whereas the unexposed root surfaces showed irregularities with an average depth of 323 microns. The depths of the abraded areas were evaluated in relation to the values for the unexposed surfaces, and an average depth of 161 microns was found. The difference between the exposed and unexposed surfaces was statistically significant.
The present study indicates that the air polisher has a strong abrading effect on exposed root surfaces and should therefore be used with caution on patients with gingival retractions.
本研究旨在评估一种新型空气磨光机对牙根表面的磨损性。
五十颗拔除的人牙进行了5秒钟的空气磨光。
所有牙根表面均可见肉眼可见的圆形缺损。扫描电子显微镜检查显示坑壁光滑，有一些开放的牙本质小管，但大多数似乎已被封闭。对暴露区域的激光轮廓测量显示缺损平均深度为484微米，而未暴露的牙根表面显示不规则，平均深度为323微米。根据未暴露表面的值评估磨损区域的深度，发现平均深度为161微米。暴露和未暴露表面之间的差异具有统计学意义。
本研究表明，空气磨光机对暴露的牙根表面有很强的磨损作用，因此对牙龈退缩患者使用时应谨慎。
