【摘要】 本文对8名中、重度牙周炎患者的48颗牙,分别行手工或超声波龈下刮治术,2个月后观察临床指标(PD、AL、BI)均有明显改善,且深袋的效果优于浅袋,但两种方法临床疗效无显著性差异。另外对6名重度牙周炎患者17颗无保留价值的牙,亦行手工或超声波刮治后立即拔除,以未刮治的离体牙作为对照,进行了根面残留牙石、菌斑面积及根面三维重建线扫描的图像分析。结果表明:手工和超声波刮治后,根面残留的牙石、菌斑均显著减少.但手工的除石效果及根面光滑度均优于超声波刮治。更多还原

【Abstract】 The objective of this study was to compare the effect of hand and ultrasonic in- strumentation in removing subgingival plaque and calculus. In experiment one, forty - eight teeth from patients were randomly assigned to be scaled with curettes or ultrasonic sealer. Probing depth, clinical attachment level and bleeding index were re-examined 2 months later. The results demonstrated that no significant differences between the two methods. In experiment two, seventeen teeth from six patient were also randomly scaled manually ultrasonic or uninstrumented as a control. All these teeth were extracted immediately after subgingival scaling. The proportion of tooth surfaces covered by residual plaque and calculus (relative to the total surface area of the side of the tooth) was analysed on each tooth using computerized graphic processing. The findings showed the proportional areas of residual plaque and calculus in teeth treated with both methods were remarkably lower than those in untreated control teeth. But the hand scaled root surface were much smoother than those treated with ultrasonic sealer.更多还原