背景:托槽周围釉质脱矿是固定矫治常见并发症之一,青少年和成人固定矫治后牙釉质脱矿的发病特点尚未见报道.目的:调查青少年和成人固定矫治后托槽周围牙釉质脱矿的发病情况.方法:随机选取2005-01/2009-07 在兰州大学口腔医院进行正畸固定矫治的恒牙列患者140 例3 179 颗牙齿,包括青少年78 例和成人62 例,记录固定矫治前后牙齿唇颊面釉质脱矿的发病情况,进行统计学分析.结果与结论:①固定矫治中有122 例发生釉质脱矿,发病率为87.14%,青少年发病率高于成人,差异有显著性意义(P < 0.05).②固定矫治中发生釉质脱矿536 颗牙齿,发病率为16.86%.青少年组观察牙齿1 784 颗,发生釉质脱矿320 颗,发病率为17.94%.成人组观察牙齿1 395 颗,发生釉质脱矿216 颗,发病率为15.48%.③青少年组和成人组上颌牙齿的发病率均大于下颌,差异有显著性意义(P < 0.05).固定矫治后牙釉质脱矿好发于上颌切牙.由此可见,正畸固定矫治中托槽周围釉质脱矿发病率较高,临床上应采取一定措施进行防治.%BACKGROUND: Enamel decalcification around the brackets is one of the most common complications after fixed orthodontic treatment. There are no reports about the onset characteristics of enamel decalcification after fixed orthodontic treatment in teenagers and adults.rnOBJECTIVE: To investigate the incidence of enamel decalcification around the brackets after fixed orthodontic treatment in teenagers and adults.rnMETHODS: 140 patients who underwent fixed orthodontic treatment at School of Stomatology, Lanzhou University from 2005-01 to 2009-07 were chosen, including 78 teenagers and 62 adults. The incidence and severity of enamel decalcification were observed and evaluated before and after treatment.rnRESULTS AND CONCLUSION: ㏕he enamel decalcification was observed in 122 cases, and the incidence rate was 87.14%. The incidence rate of the teenager group was significantly higher than that of the adult group (P< 0.05). ?Totally 536 teeth had enamel decalcification, and the incidence was 16.86%. 320 of 1 784 teeth in the teenager group had enamel decalcification, and the incidence rate was 17.94%. 216 of 1 395 teeth in the adult group, and the incidence rate was 15.48%.㏕he incidence rates of maxillary teeth in teenagers and adults were both obviously higher than those of mandibular teeth (P < 0.05). The enamel decalcification often occurred in maxillary incisor teeth. It is indicated that the incidence rate of enamel decalcification after fixed orthodontic treatment is high, and clinical measures should be taken to prevent and cure it.
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