关键词: 固定矫治, 喷砂, 菌斑性龈炎, 牙周状况

Abstract:

Objective    To observe the effectiveness of glycine powder air-polishing and sodium bicarbonate air-polishing with orthodontic appliances on periodontal health. Methods    The trial was conducted as a split-mouth designed study including 33 patients who with dental plaque-induced gingivial disease needed fixed orthodontics were randomly divided into two groups：the treatment group（glycine powder air-polishing）and the control group（sodium bicarbonate air-polishing）. The patients were reexamined at baseline，one week after treatment，and the following parameters were recorded：probing pocket depth（PD），bleeding index（BI），gingival index（GI），plaque index（PLI）. The time needed for treatment，the number of teeth with gum immediately bleeding after treatment and the patients’ satisfaction levels. Results    The treatment group resulted in significant reductions of BI（P < 0.05）， GI（P < 0.05）and PLI（P < 0.05）. The control group resulted in significant reductions of BI（P < 0.05），GI（P < 0.05）and PLI（P < 0.05）. The differences in the number of teeth with gum immediately bleeding after treatment（P < 0.05）and the satisfaction investigation（P < 0.05）between the two groups were statistically significant. Conclusion    Two methods can effectively improve periodontal health，but glycine powder air polishing offers greater patient satisfaction and almost on damage to the gums during the course of therapy.

Key words: fixed orthodontics, air-polishing, dental plaque-induced gingivitis, periodontal health