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目的 :探讨喷粉抛光技术对牙釉质和牙骨质表面组织结构的影响程度 .方法 :随机选择健康恒切牙、双尖牙和磨牙各 3颗 ,分别在每个牙冠和牙根各切取 5个标本 牙釉质和牙骨质标本各 45个 ,各分成五组 ,在相同的条件下对其进行喷粉抛光 ,各组喷粉时间分别为 0、5、10、30、60 s,应用卡尺测量喷粉抛光前后标本的厚度 ,然后在扫描电镜下观察其表面结构的变化 .结果 :在同一组的牙釉质或牙骨质标本的表面结构变化和磨损厚度没有明显差异 ;在牙釉质标本表面 ,即使喷粉时间达 60 s,其结构及磨损厚度变化也不明显 ;但牙骨质表面 ,喷粉时间仅 5 s,其表面结构就有实质性的变化 ,时间越长 ,磨损越严重 ,其磨损厚度呈直线性改变 .结论 :在牙周病的治疗和预防过程中 ,不仅要考虑到喷粉抛光技术的有效一面 ,同时也要注意到其磨损作用
OBJECTIVE: To investigate the effect of dusting and polish on the surface structure of enamel and cementum.Methods: Three healthy permanent incisors, bicuspid and molar were randomly selected, each of which was cut into 5 A total of 45 enamel and cementum specimens were divided into five groups, and were dusted and polished under the same conditions. The duster time of each group was 0, 5, 10, 30 and 60 s, respectively. The thickness of the specimens before and after spraying and polishing were measured, and the changes of the surface structure were observed under a scanning electron microscope.Results: There was no significant difference in the surface structure and wear thickness of the enamel or cementum specimens in the same group, , Even though the dusting time was up to 60 s, the structure and the thickness of wear did not change obviously. However, the surface of the cementum and dusting time were only 5 s, the surface structure had a substantial change, the longer the time, the more severe the wear, The wear thickness showed a linear change.Conclusion: In the periodontal disease treatment and prevention process, not only to consider the effective side of the dusting polishing technology, but also to pay attention to its wear and tear