Zhu Q
School of Stomatology, Beijing Medical University.
Zhonghua Kou Qiang Yi Xue Za Zhi. 1991 Jul;26(4):195-8, 253.
341 mottled teeth were bleached with 4% and 18% hydrochloric acid; the mixture of 36% hydrochloric acid, 30% hydrogen peroxide and anesthetic ether; and 30% hydrogen peroxide warmed by infra-red ray lamp. The effects were evaluated clinically. The extracted mottled and normal teeth were treated with the methods mentioned above. The decolouration effects, the structural changes of tooth surface, and the remineralization were examined by scanning electronmicroscopy and polaroid microscopy. The results showed: all of the four methods had the decolouration effects; the decolouration effect was better in the teeth with higher mineralization and the pigmentation existed more superficially; complete decolouration was 94.8% and lightened cases were 5.2%. The mechanism of decolouration seemed to be the dissolution of tooth superficial layer containing pigment. The decalcified tooth surface might be recalcified by the treatment of recalcification solution, or by saliva itself.
用4%和18%的盐酸、36%的盐酸、30%的过氧化氢和麻醉乙醚的混合物以及用红外线灯加热的30%过氧化氢对341颗斑釉牙进行漂白，并进行临床效果评估。对拔除的斑釉牙和正常牙用上述方法进行处理，通过扫描电子显微镜和宝丽来显微镜检查脱色效果、牙齿表面的结构变化及再矿化情况。结果显示：四种方法均有脱色效果；矿化程度较高且色素沉着较浅的牙齿脱色效果较好；完全脱色率为94.8%，变淡率为5.2%。脱色机制似乎是含色素的牙齿表层溶解。脱钙的牙齿表面可通过再钙化溶液处理或唾液自身作用而重新钙化。
