Title: Observation of changes in dental tissues of root caries prepared by Er,Cr: YSGG laser
Abstract: Objective To observe the morphological changes in dental tissues of root caries and dentin embolism rate by scanning electron microscope( SEM) after using two different methods for caries removal. Methods Twenty extracted elderly people teeth with similar size of moderate carious lesions were enrolled in the study. They were divided into two groups: high speed drill group and Er,Cr: YSGG laser group. After treatment,the teeth samples were investigated by SEM at different magnification,the morphological changes in the tissues and the working time were registered and compared. Results The time of traditional high-speed drill group was of no significant difference compared with Er,Cr: YSGG laser group( P 0. 05). By using SEM,the surface of smear layer was thicker and only a little dentinal tubules orifices were open by high-speed drill,the dentin embolization rate was 91. 1%. The teeth surfaces prepared with Er,Cr: YSGG laser remained little smear layer and dentinal tubules orifices were clearly exposed. The surfaces were highly retentive and dentin tubule embolism rate was 13. 3%. The difference between two groups was statistically significant( P 0. 05). Conclusions The teeth surfaces prepared with Er,Cr: YSGG laser remained little smear layer and dentinal tubules orifices could be clearly exposed. The surfaces are highly retentive. Er,Cr: YSGG laser is an effective treatment.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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