慢性牙周炎基础治疗后维护期疗效纵向观察及分析

Longitudinal effects of maintenance therapy on chronic periodontitis

目的观察慢性牙周炎患者基础治疗后维护期的疗效，并分析牙位和位点因素对牙周袋探诊深度变化的影响。方法对牙间基础治疗后进入维护期的22例慢性牙周炎患者进行9个月的纵向观察、每3个月给予口腔卫生宣教，龈上洁治、龈下刮治和根血平整。在基线（基础治疗完成后）和每次复查时记录牙周袋探诊深度、临床附着丧失和探诊出血情况。结果维护治疗期间，牙周袋探诊深度、临床附着丧失、探诊出血等临床指标均有进一步改善，牙周袋深度前牙减少（0．52±1．02）mm，后牙减少（0．37±1．26）mm，差异有统计学意义（P〈0．05）；邻面位点与非邻面位点相比，邻面位点的牙用袋深度减少更显著（P〈0．05）；6mm及以上的位点牙周袋深度减少（1．88±2．19）mm，4～5mm的位点牙周袋深度减少（1．12±1．32）mm，差异有统计学意义（P〈0．05）。结论慢性，牙周炎患者基础治疗后每3个月进行维护治疗，可使牙周临床指标进一步改善，牙位与位点因素均对牙周袋深度的变化有影响。

Objective To observe the longiludinal effects of maintenance therapy on chronic periodontitis, and inspect the relationship between probing depths （PD） and looth-or site-factors. Methods Twenty-two patients with chronic periodontitis were enrolled in a 9-month maintenance care program after non-surgical periodontal therapy. Oral hygiene instruetions together with supra- and sub-gingival scaling and root planing were carried out every 3 months. PD, clinical attachment level （CAL） , and bleeding on probing （BOP） were recorded at baseline and each re-examination points. Results The clinical paramelers were improved notably throughout the maintenance period. Non-molars demonstrated a grealer reduction of PD than molars. PD decreasing was more pronounced at approximal sites than non-approximal sties. Shes with PD≥6mm showed a greater PD reduction than sites with 4 -5 mm PD. Conclusion 3-month interval of maintenance therapy will improve the clinical parameters of chronic periodontitis after non-surgical treatment. Tooth- and sitefactors may influence the variation of PD.