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目的比较采用两种数字印模方法制取印模后制作全瓷冠修复体的临床疗效。方法选取的研究对象为2013年9月至2014年7月于沈阳维康医院就诊的87例患者共146颗后牙,随机分为口内直接法组和口外间接法组,每组73颗患牙,分别采用口内直接法和口外间接法制取数字印模,CAD/CAM制作全瓷冠修复体,临床戴用后6个月、12个月后随访,采用改良的美国公共卫生署(USPHS)评价系统评价治疗效果。结果修复治疗后6个月、12个月时两组患牙成功率比较,差异无统计学意义(P>0.05)。结论口内直接法和口外间接法制取数字模型相比无显著差异,均是较为理想的印模制取方式。
Objective To compare the clinical effects of using two kinds of digital impression methods to make full ceramic crowns after impressions. METHODS: A total of 146 posterior teeth of 87 patients treated at Weikang Hospital in Shenyang from September 2013 to July 2014 were randomly divided into oral instillation group and oral indirect group, with 73 teeth in each group , Respectively. The digital impressions were made by the direct oral method and the indirect oral method. All-ceramic crowns were made by CAD / CAM. After 6 months and 12 months after clinical wear, the USPHS Systematic evaluation of the therapeutic effect. Results There was no significant difference in the success rate of teeth between the two groups at 6 months and 12 months after repair (P> 0.05). Conclusion There is no significant difference between the oral direct method and the indirect method of taking the digital model, which is an ideal method of impression preparation.