人体牙髓对诊室牙齿漂白的反应。
Human pulp responses to in-office tooth bleaching.
作者信息
Costa Carlos Alberto de Souza, Riehl Heraldo, Kina João Fernando, Sacono Nancy Tomoko, Hebling Josimeri
机构信息
Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University, Araraquara, Brazil.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Apr;109(4):e59-64. doi: 10.1016/j.tripleo.2009.12.002.
OBJECTIVE
To evaluate and compare the responses of human incisor and premolar pulps after bleaching.
STUDY DESIGN
A bleaching agent with 38% hydrogen peroxide (H(2)O(2)) was applied on the buccal surface of 10 sound lower teeth (G1: 6 premolars; G2: 4 incisors) for 45 minutes. Three premolars and 3 incisors that received only rubber/pumice prophylaxis were used as control groups G3 and G4, respectively. Two days after the bleaching procedure, the teeth were extracted and processed for histologic evaluation.
RESULTS
Only in G2 (4 incisors) were any changes in the pulp detected. In the coronal pulp there was a large zone of coagulation necrosis. The radicular pulp showed mild inflammatory changes manifested as an accumulation of mononuclear cells around congested and dilated blood vessels. No pulpal damage was seen in either of the control groups (G3 and G4) or in group G1.
CONCLUSION
Bleaching with 38% H(2)O(2) for 45 minutes causes irreversible pulp damage in lower incisors but not in premolars.
目的
评估并比较漂白后人切牙和前磨牙牙髓的反应。
研究设计
将含38%过氧化氢（H₂O₂）的漂白剂涂于10颗健康下牙的颊面（G1组：6颗前磨牙；G2组：4颗切牙）45分钟。仅接受橡胶/浮石清洁预防的3颗前磨牙和3颗切牙分别作为G3组和G4组对照组。漂白操作两天后，拔除牙齿并进行组织学评估。
结果
仅在G2组（4颗切牙）检测到牙髓有任何变化。在冠髓有一大片凝固性坏死区域。根髓显示轻度炎症变化，表现为充血扩张血管周围单核细胞积聚。在对照组（G3组和G4组）或G1组均未观察到牙髓损伤。
结论
用38% H₂O₂漂白45分钟会导致下切牙牙髓发生不可逆损伤，但前磨牙不会。
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