Methods 40 patients with no absence of tooth are treated with ultrasonic scaling. Then, Ash propel polish was used on the left side tooth or the right side tooth Randomly.

• 方法:临床随机选择40例无牙缺失的牙周病患者进行超声波洁治,洁治后随机对同一病例左侧或右侧牙齿进行喷砂抛光,观察DI、PI和SBI的变化,对超声波洁治后使用喷砂抛光的临床效果进行评价。