用30%过氧化氢冠内漂白可引起牙根外吸收,发生率为7%。由此可导致牙齿和牙槽嵴的广泛损伤,然而对此尚缺乏有效的治疗方法. 有学者试图以龈下刮治术使吸收停止,但由于复发及吸收组织颇具持久性,成功率很低,冠内置入氢氧化钙,仅个别病例的吸收缺损有钙化基质形成,因此也有 With 30% hydrogen peroxide crown bleaching can cause external root resorption, the incidence was 7%. Which can lead to extensive damage to the teeth and alveolar ridge, however, there is a lack of effective treatment for this.Some scholars tried to subside the curettage to stop the absorption, but due to recurrence and absorption of the organization quite persistent, the success rate is very low , Crown built into calcium hydroxide, only a few cases of absorption defect formation of calcified matrix, so there are