Surface Analysis of Different Tooth Prepared Using Er,Cr:YSGG Laser,Er:YAG Laser and High Speed Diamond Burs.

• Main Authors: Riana Laitu Poma (Laitu Puapua Poma), 睦韻蘭
• Other Authors: Lin, Che-Tong
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/87562314192269647315

碩士 === 臺北醫學大學 === 牙醫學系碩博士班 === 98 === Objective: The surface roughness and wettability of teeth prepared with new erbium dental lasers is not clear. The purpose of this study is to characterize the surface roughness and its influence on wettability of the etched and non etched teeth prepared for complete crowns with high speed diamond burs, Er,Cr:YSGG (Erbium,Chromium:Yttrium,Scandium,Gallium,Garnet) and Er:YAG(Erbium:Yttrium,Aluminium,Garnet) lasers. Background Data: Erbium dental lasers, on the process of thermomechanical interaction with biological tissues, ablate dental hard tissues resulting in rough surfaces with almost complete removal of smear layer. Adequate surface roughness could improve surface wettability thus enhancing crown seating. Methods: Part 1: 24 extracted non carious molars were divided into three groups, Er,Cr:YSGG laser, Er:YAG laser and High speed diamond rotary. 4 from each group were prepared into dentin and the other 4 into enamel. 2 samples from each preparation of enamel and dentin were etched with 37% phosphoric acid. All samples were viewed under SEM. Part 2: 60 extracted non carious molars were sectioned in halves. 120 halves were equally divided into the three groups. 20 halves from each group were prepared into dentin, the other 20 into enamel. 10 samples from enamel and dentin samples were etched. Surface roughness for all samples was measured by the profilometer. Part 3: The contact angles for the same samples in Part 2 were measured. Results: Teeth prepared using high speed diamond burs revealed the smoothest surfaces with the smallest contact angle measured for the etched and non-etched samples compared to lasers prepared samples. Conclusion: Laser prepared teeth are rougher and showed more open tubules than those prepared with high speed diamonds. However it does not increase the wettability of the surface. Further research for bonding test is recommended.