过氧化脲治疗四环素牙的远期疗效

目的评价10％过氧化睬凝胶漂白剂家庭漂白（In-home bleaching）治疗四环素牙的远期临床效果。方法用含10％过氧化脲的凝胶漂白剂。通过可由患者自行取戴的漂白托盘治疗四环素牙，观察其脱色效果及牙色复原等变化情况。结果306例四环素牙患者漂白总满意率为86．6％；随访6个月的201例中，有14．9％于6个月后出现不同程度的颜色复原。1～2年后，仍有较高的满意率。其中30例。每隔2年做1次巩固治疗。随访11年临床效果良好。结论10％过氧化脲凝胶漂白剂治疗四环素牙是有效的方法，着色度越轻治疗效果越好，着色度越重治疗效果越差。同时，漂白治疗具有一定的复原性，坚持巩固治疗。远期效果令人满意。

Efficacy of carbamide peroxide on tetracycline teeth

Objective To evaluate the long-dated therapeutic dfficacy of carbamide peroxide on tetracycline teeth. Methods 10% carbamide peroxide was prepared as a bleaching solution for the treatment of tetracyclineteeth. 306 patients were treated with aspecial bleaching salver containing the solution for 7-10 h in aperiod of 10-30 d. The color changes of the teeth were observed. Follow up data were obtained in 201 patients. Results Effective rate of bleaching was 86. 6% in patients with tetracycline teeth. After following up for 6 months in 201 patients, 14. 6% of them returned to the original color of teeth, but there was still a high-rate of satisfaction after 1-2 years follow up, in which 30 patients received repeated therapy every two years for 11 years with satisfactory results. Conclusion 10% carbamide peroxide in the treatment of tetracycline teeth is an effective method. The lighter in teeth color, the better the effect of bleaching. But the therapeutic efficacy is instableand a long dated satisfaction can be obtained with repeated treatment.