Abstract:

Objective　To observe the efficacy of CEREC 3D chair side computer-aided design and manufacturing (CAD/CAM) glass-ceramic high inlay in repairing large area defects of maxillary first premolars. Methods　A total of 72 patients with large maxillary first premolar defects admitted to Yantai Yantai Mountain Hospital from February 2017 to June 2019 were retrospectively selected, including 31 males and 41 females who were (38.57±7.21) years old. All the affected teeth were repaired by the CEREC 3D chair-side CAD/CAM technique one week after one-time root canal treatment, and were followed up for 24 months after the restoration. The repair effects 3, 6,12 and 24 months after reprir and their repair satisfaction 24 months after repair were analyzed. χ² test was applied. Results　Three months after the restoration, all the patients achieved grade A in terms of edge fit, restoration defect, porcelain fracture, restoration loss, color matching, connection relationship, and periodontal development. The proportions of the patients with grade B of different evaluation items 6, 12, and 24 months after restoration slightly increased, with no statistical difference in the repair effect between different times (χ²=0.383, P=0.702). Twenty-four months after the restoration, the satisfaction rates with the restoration color, restoration shape, surface smoothness, and inlay edge suitability were 86.11% (62/72), 98.61% (71/72), 88.89% (64/72), and 97.22% (70/72), respectively. Conclusion　CAD/CAM glass-ceramic inlay is an effective method for repairing large-area defects of maxillary first premolars after root canal treatment, and is worthy of clinical application.

Key words:

High inlay, Chairside computer-aided design and production, Maxillary first premolars, Large area defects, Restoration

摘要：

目的　观察计算机辅助设计与制造（CAD/CAM）玻璃瓷高嵌体修复上颌第一前磨牙大面积缺损的疗效。方法　回顾性分析2017年2月至2019年6月在烟台市烟台山医院收治的72例上颌第一前磨牙大面积缺损患者作为研究对象，其中男31例、女41例，年龄（38.57±7.21）岁。所有患牙均于一次性根管治疗1周后采用CAD/CAM技术行玻璃瓷高嵌体修复，修复完成后进行24个月随访。分析患者修复后3个月、6个月、12个月、24个月的修复效果及修复后24个月的满意度。统计学方法采用χ²检验。结果　修复后3个月，所有患者边缘密合度、修复体缺损、崩瓷、修复体脱落、颜色匹配度、领接关系及牙周发炎均达A级；修复后6个月、12个月、24个月患者不同评价条目B级占比略有上升，但不同时间患者修复效果比较，差异无统计学意义（χ²=0.383，P=0.702）。修复后24个月，上颌第一前磨牙大面积缺损患者的修复体颜色、修复体外形、表面光滑度及高嵌体边缘适合性满意度分别为86.11%（62/72）、98.61%（71/72）、88.89%（64/72）、97.22%（70/72）。结论　CAD/CAM玻璃瓷高嵌体为上颌第一前磨牙大面积缺损根管治疗后有效修复方法，值得在临床推广。

关键词:

高嵌体, 计算机辅助设计与制造, 上颌第一前磨牙, 大面积缺损, 修复