固定矫治错患者牙周维护中龈下微生物的变化

目的 探讨固定矫治中0.12％氯已定溶液漱口对龈下微生物的影响。方法 选择龈炎明显的48例10-17岁固定矫治患者,经龈上洁治后随机分为生理盐水漱口(对照组)、口腔卫生宣教加生理盐水漱口(NS组)、口腔卫生宣教加0.12％氯已定漱口(CH组)3组,镜下比较洁治前及洁治后1周、1个月和3个月时龈下微生物(球菌、杆菌、螺旋体)比例的变化。结果 对照组和NS组的球菌比例先升后降,螺旋体的比例变化相反;CH组4次的检测结果,球菌比例呈升高状态,螺旋体呈下降趋势。对照组和CH组洁治后3个月检测,球菌和杆菌比例变化的差异有显著性(P<0.05)。结论 用0.12％氯已定溶液漱口对龈下微生物的变化有良性影响,有助于正畸患者牙周健康的维护。

The changes of subgingival microbials during periodontal maintenance in patients with gingivitic and wearing fixed orthodontic appliances

Objective To investigate the microbiological changes of subgingival microbials in patients with gingivitis and wearing fixed orthodontic appliances. Methods 48 subjects ( 10 to 17 years old) with gingivitis, and wearing fixed orthodontic appliances, were divided randomly into three groups (placebo, NS and CH). Placebo group had normal saline mouthrinse; only and no oral hygiene instruction (OHI). The NS group had OHI and normal saline mouthrinse; The CH group had OHI and 0. 12% chlorhexidine gluconate mouthrinse. Bacterial examinations were carried out on baseline, one week, one month and three months after scaling. The bacterial examination was carried out. The percentage of coccus, bacillus and spirochete was calculated. Results In placebo group and NS group , the percentage of coccus increased up to the third examination then dropped down. The spirochete's percentage changed inversely. CH group maintained an increasing trend in coccus' percentage and decreasing trend in spirochete' s percentage. The percentage changes of coccus and bacilus between placebo group and CH group are statistically significant (P < 0. 05). Conclusions During the three-month examination, the CH group had better microbiologic change than the other two groups.