牙周炎基础治疗后牙槽骨变化的动态观察

为动态观察牙周炎基础治疗后牙槽骨的变化，作者利用数字减影技术对９例牙周炎患者的１０４个齿槽骨邻面位点进行了追踪观察。结果表明：不同个体的牙槽骨对治疗的反应分３种类型；牙槽骨骨量增加的最早时间为治疗后２个月；骨量增加幅度最大为治疗后９～１２个月；骨量有呈指数增加的趋势。

A longitudinal study of alveolar bone repair following non surgical treatment in periodontitis

The purpose of this study was to monitor post-treatment alveolar bone repair using digital subtraction radiography (DSR). 104 interproximal bone crestal sites were selected from 52 premolars in 9 periodontitis patients (6 male, 3 female, aged 29-63 years). Acrylic stents were used to ensure serial radiographs which were taken at initial visit, 2 weeks, and 1, 2, 3, 6, 9, 12 month(s) after scaling and root planning. Results showed: in some of the observed sites, small amount of bone increase was detected as early as two weeks after the non-surgical therapy. Statistically significant bone gain (P < 0.001) occurred at second month and peaked at 12 months after instrumentation. The increment of bone gain displayed an exponential curve. Three different patterns of alveolar bone reaction to treatment appeared among different patients. This study demonstrates that DSR is a sensitive and quantitative method in the monitor of bone fill after periodontal treatment.