METHODS:30 crowns and fixed partial dentures with chronic periodontits were random ly assigned to receiving either 20 g/L minocyeline gel treatment or ultrasonic s caling treatment.

• 方法:将30个由人工冠和固定义齿引起的慢性牙周炎患牙随机分为超声龈上洁治组和派丽奥组并在基线和治疗后1周、12周时检查患牙的临床指标。