全程数字化新型全锆冠在前牙修复中的应用2例报告

The application of newly developed self-glazed zirconia crowns with completely digital workflow in esthetic zone

目的:探讨全程数字化扫描、设计和制作不加饰瓷的新型全锆冠在前牙修复中的应用前景。方法:结合2例要求前牙修复的患者,1例常规牙体预备,分别采用不加饰瓷的全程数字化新型全锆冠和传统的数字化切割二氧化锆内冠加人工饰瓷方法制作全瓷冠,对比两种修复体在口内的修复效果差异。1例采用微创牙体预备,保存牙髓活力,全程数字化设计制作完成新型全锆冠,唇侧冠厚度仅为0.6 mm。结果:新型全锆冠可通过在唇侧上透明釉方式,或在冠唇侧厚度仅为0.6 mm情况下,获得较为自然的仿生美学效果。结论:新型数字化全锆冠在获得较为良好的美学效果的同时,能完成微创修复和咬合关系不良等一些复杂病例的修复。

Objective To evaluate the feasibility of the application of newly developed self-glazed zirconia crowns with-out veneering porcelain in the esthetic zone by following a completely digital workflow. Methods： To compare the esthetic outcomes of two patients who had been treated for esthetic restorations in the anterior maxilla. For one case, teeth were pre-pared with minimally invasive approach allowing for the preservation of dental pulp vitality. Monolithic self-glazed zirconia crowns with a thickness of only 0.4 mm in the labial side was prepared. For another case, teeth were prepared based on con-ventional preparing procedure. Two kinds of zirconia crowns were then prepared, namely monolithic self-glazed zirconia crowns without veneering porcelain and conventional laminate-structured zirconia crowns with veneering porcelain, respec-tively. Results： The monolithic self-glazed zirconia crowns with a thickness of only 0.6 mm in the labial side was prepared, as well as the self-glazed zirconia crowns were applying glaze on the labial surface if necessary, that can also achieve a more natural, authentic and biomimetic appearance. Conclusion： The self-glazed zirconia crowns prepared by following a completely digital workflow can obtain superior esthetic results while allowing the minimal invasive preparation and en-abling the treatment of the complicated cases with high aesthetic demands.