研究目的
To evaluate and compare the morphological and histopathological changes in the enamel, dentin and pulp tissue of the teeth treated by Er:YAG laser and conventional burs.
研究成果
The Er:YAG laser is effective in the removal of dental hard tissue without damaging the pulp when coupled with ideal energy output. It is widely used in different dental fields. It needs time to be accepted by dentist and patients and further studies are required to explore its advantages.
研究不足
The study did not assess patient psychology between the study groups. The time with lasers can be reduced by increasing the energy densities, but the risk of pulpal damage may be increased.
1：Experimental Design and Method Selection:
The study involved preparing a conventional class I cavity in orthodontic patients using Er:YAG laser and conventional burs, followed by extraction and analysis of the teeth.
2：Sample Selection and Data Sources:
18 patients (40 extracted teeth) undergoing extraction of permanent teeth for orthodontic purpose were selected, excluding decayed, restored and malformed teeth.
3：List of Experimental Equipment and Materials:
Fidel Plus III Er:YAG laser, no. 12 diamond burs, SI‐47 straight fissure bur, scanning electron microscope (SEM), hard tissue microtome, Leica SP
4：Experimental Procedures and Operational Workflow:
16 Cavity preparation, tooth extraction, SEM analysis, ground section preparation, histopathological examination.
5：Data Analysis Methods:
Descriptive analysis and 1‐way ANOVA for time difference between groups.
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