Ganesh R, Aruna S, Joyson M
Department of Pediatric Dentistry, College of Dental Surgery, Saveetha University, Chennai - 600 077, Tamilnadu, India.
J Indian Soc Pedod Prev Dent. 2013 Jan-Mar;31(1):17-21. doi: 10.4103/0970-4388.112394.
Everyone wants whiter teeth to make them feel younger and to provide beautiful smiles with the accompanying increase in self-esteem. Bleaching is an established, simple, cost-effective and conservative method for improving the color of the discolored teeth.
The aim of this in vitro study was to compare the bleaching efficacy of 10% carbamide peroxide, 10% hydrogen peroxide and 2g sodium perborate as bleaching agents on the artificially discolored human primary maxillary central incisors.
Forty extracted human primary central incisors with intact crowns were selected for the study. Pulpectomy was performed and each tooth was artificially stained with 2 ml of fresh human blood and centrifuged. --The teeth were randomly divided into four experimental groups of 10 teeth each and the baseline color evaluation was performed. 0.04 ml of the bleaching agent is syringed into the access cavity of the tooth and, in the control group, 0.04 ml of distilled water was syringed into the access cavity and it was sealed with IRM and placed at 37°C in an incubator throughout the experiment. The color of the bleached teeth was determined at 0, 7 and 14 days. The data obtained were analyzed using ANOVA and Turkey's test.
There was statistical significance (P = 0.00) among the carbamide peroxide, sodium perborate, hydrogen peroxide and control groups after 7 and 14 days and a significance of P = 0.013 among the carbamide peroxide, sodium perborate and hydrogen peroxide after two bleaching sessions (day 14) was seen.
The bleaching efficacy of 10% hydrogen peroxide gel was more effective than 10% carbamide peroxide and sodium perborate in bleaching the artificially discolored primary teeth.
每个人都希望牙齿更洁白，以使自己感觉更年轻，并展现出美丽的笑容，同时自尊心也会随之增强。牙齿漂白是一种既定的、简单、经济高效且保守的改善变色牙齿颜色的方法。
本体外研究的目的是比较10%过氧化脲、10%过氧化氢和2克过硼酸钠作为漂白剂对人工染色的人上颌乳中切牙的漂白效果。
选取40颗冠部完整的拔除人乳中切牙用于研究。进行牙髓摘除术，每颗牙齿用2毫升新鲜人血人工染色并离心。将牙齿随机分为四个实验组，每组10颗，进行基线颜色评估。将0.04毫升漂白剂注入牙齿的髓腔，在对照组中，将0.04毫升蒸馏水注入髓腔，并用IRM密封，在整个实验过程中置于37°C的培养箱中。在第0、7和14天测定漂白后牙齿的颜色。使用方差分析和土耳其检验对获得的数据进行分析。
7天和14天后，过氧化脲、过硼酸钠、过氧化氢组与对照组之间存在统计学意义（P = 0.00），在两次漂白疗程（第14天）后，过氧化脲、过硼酸钠和过氧化氢组之间的P值为0.013，具有统计学意义。
10%过氧化氢凝胶在漂白人工染色的乳牙方面比10%过氧化脲和过硼酸钠更有效。
