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Journal of Oral Laser Applications

Year 2003
Volume 3 , Issue 4

Pages: 235 - 242

A Scanning Electron Microscopic Comparison of Different Caries Removal Techniques for Root Caries Treatment

Katleen I. M. Delmé/Roeland J. G. De Moor

Purpose: This in vitro study aimed to evaluate the different surface characteristics of dentin cavity walls created after preparation with five different caries removal techniques: hand excavation, slow-speed bur excavation, air abrasion, Carisolv gel, and Er:YAG laser ablation. Materials and Methods: Fifty extracted human teeth (premolars and molars) with root caries were used. Ten cavities were prepared using each excavation method. SEM observations were made of each treatment type. Results: Each excavation technique produced a different and characteristic dentin surface. The hand-excavated, bur-excavated and air-abraded dentin surfaces remained covered with a residual, rather unevenly distributed and packed smear layer, with the characteristic tracks resulting from scraping, bur movement, or the stream of pressurized air bearing abrasive particles. The use of Carisolv gel resulted in the creation of a flaky surface (packed smear layer and remnants of debris) with the presence of partly occluded dentinal tubules. The use of Er:YAG laser resulted in an irregular, crater-like but clean surface with very little smear layer. Vaporization of intertubular dentin was greater than of peritubular dentin. A limited dentin melting effect was observed in three of the ten samples. Conclusion: Distinct differences in appearance were found among the samples treated with the different caries excavation methods.


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