AIM: To observe the effect of hybrid subgingival scaling (combining ultrasonic scaling with hand scaling) by SEM.
目的：超声龈下刮治结合手工刮治，用扫描电镜的方法观察效果。
Conclusions: Ultrasonic subgingival scaling is effective on the treatment of chronic periodontitis as well as hand instrumentation.
结论：超声龈下洁治和手工龈下刮治一样能够有效地治疗慢性牙周炎。
Conclusion Combination of topical application of a metronidazole 25% dental gel with subgingival scaling could be more effective in the treatment of deep periodontal pockets.
结论局部应用2 5%甲硝唑牙科用凝胶辅助龈下刮治治疗深牙周袋，可获得较好的临床效果。
Objective: To study the effect on the root surfaces and the work efficacy following ultrasonic subgingival scaling with different output power and different parts of work tip.
目的：研究不同功率下超声龈下工作尖的不同工作端对牙根面的影响及其工作效率。
After years of practice, it was confirmed that subgingival scaling was an effective non-surgical periodontal therapy. In early, subgingival sealing was practiced with manual sealing.
经过多年的实践证实龈下刮治是一种有效的牙周非手术治疗方法，早期的龈下刮治主要是用手工刮治器。
After years of practice, it was confirmed that subgingival scaling was an effective non-surgical periodontal therapy. In early, subgingival sealing was practiced with manual sealing.
经过多年的实践证实龈下刮治是一种有效的牙周非手术治疗方法，早期的龈下刮治主要是用手工刮治器。
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