Koulaouzidou E, Lambrianidis T, Beltes P, Lyroudia K, Papadopoulos C
Department of Dental Pathology and Therapeutics, Aristotle University of Thessaloniki, Greece.
Endod Dent Traumatol. 1996 Jun;12(3):146-50. doi: 10.1111/j.1600-9657.1996.tb00114.x.
Intracoronal bleaching of nonvital, teeth with 30% hydrogen peroxide is occasionally associated with external cervical root resorption. The exact mechanism by which bleaching induced root resorption occurs is not yet fully understood. The relationship of cementum to the enamel at the cementoenamel junction may have clinical significance. Seventeen single rooted human mandibular premolars extracted atraumatically for orthodontic reasons were used. The radicular hydrogen peroxide penetration in each tooth was measured in vitro by an indirect colorimetric method. Thereafter, the teeth were examined with a scanning electron microscope to determine the type of the cementoenamel junction. It was found that the radicular penetration of 30% hydrogen peroxide was related to the type of cementoenamel junction.
使用30%过氧化氢对非活髓牙进行冠内漂白偶尔会伴有外部颈缘牙根吸收。漂白诱导牙根吸收发生的确切机制尚未完全明确。在牙骨质釉质界处牙骨质与釉质的关系可能具有临床意义。使用了17颗因正畸原因而无创伤拔除的单根人下颌前磨牙。通过间接比色法在体外测量每颗牙齿的牙根过氧化氢渗透情况。此后，用扫描电子显微镜检查牙齿以确定牙骨质釉质界的类型。结果发现，30%过氧化氢的牙根渗透与牙骨质釉质界的类型有关。
