前牙氧化锆全瓷翼板粘接桥的短期临床观察

目的 探索应用计算机辅助设计和计算机辅助制造（CAD/CAM）氧化锆全瓷翼板粘接桥修复单颌1～2颗前牙缺失的方法,观察其短期的临床修复效果。方法 实验流程为：收集临床资料,明确纳入标准;设计方案;牙体预备;技工室制作;试戴及粘接;随访。结果 共制作氧化锆全瓷翼板粘接桥5件,其中,单翼板式粘接桥2件,双翼板式粘接桥3件,平均观察6个月。在复诊检查结果中,5件氧化锆全瓷翼板粘接桥无变色、折裂、松动、脱落等情况发生,修复体边缘密和性良好,基牙无边缘着色、继发龋等发生,5件修复体均被评定为A级。结论对于单颌1～2颗前牙缺失的患者,采用CAD/CAM氧化锆全瓷翼板粘接桥修复可以取得较好的短期临床修复效果,但其粘接强度能否满足临床要求尚需进一步的观察。

Short-term clinical observation of anterior zirconia all-ceramic resin-bonded bridges

Objective A new restorative method for the restoration of one to two missing anterior teeth was explored using zirconia all-ceramic resin-bonded bridges fabricated through computer-aided design and computer-aided manufacturing（CAD/CAM）. The short-term clinical performance of the bridges was evaluated. Methods Clinical data were collected, and inclusion, as well as exclusion, criteria were determined. A restoration plan was designed. Tooth preparation and laboratory production were performed. Try-in and bonding were conducted. The performance of the bridges was evaluated during follow-up. Results A total of five anterior zirconia all-ceramic resin-bonded bridges were fabricated through CAD/CAM. The bridges included two zirconia all-ceramic resin-bonded bridges with single-retainer design and three zirconia all-ceramic resin-bonded bridges with two-retainer design. The mean observation time was six months. During follow-up, no discoloration, fracture, loosening, and shedding were detected in the zirconia all-ceramic resin-bonded bridges. All abutments had good marginal integrity, and no marginal discoloration or secondary caries was observed. Five restorations were rated as A grade. Conclusion Zirconia all-ceramic resin-bonded bridges fabricated through CAD/CAM exhibited short-term good restoration effects for patients with one or two missing anterior teeth. However, whether the bonding strength of these bridges could meet the clinical requirement requires further investigation.