Abstract：
A conservative approach to restoration assists in preserving the remaining tooth structure of extensively destroyed vital teeth. This case report describes a single-appointment chairside technique for placement of ceramic restorations in posterior teeth. A patient presented for treatment of her mandibular right first molar, which had a fractured resin-based composite restoration. Due to the presence of vital pulp, extent of the restoration, and presence of caries in the tooth, the following treatment plan was proposed: placement of a lithium disilicate glass-ceramic onlay fabricated with a computer-aided design/computer-aided manufacturing workflow. After the dentist removed the restoration and performed selective caries removal, structural analysis guided the reduction of the buccal cusps. Immediate dentin sealing was performed with a 2-step self-etching adhesive system, and a 1-mm-thick layer of flowable resin-based composite was placed as a resin coating. A digital impression was obtained, the onlay restoration was designed, and a lithium disilicate block was milled and subsequently crystallized. When the onlay was completed, the tooth preparation was sandblasted, selectively etched, and coated with a universal adhesive. The intaglio surface of the onlay was cleaned and primed, the onlay was bonded with dual-cure resin cement, and occlusal adjustments were completed. Follow-up examinations at 1 and 4 months revealed the clinical success of the case. From start to finish, it takes approximately 2.5 hours to produce a single-appointment chairside restoration. The technique used in this case offers a fast-paced workflow that is comfortable and practical for the patient and provides a predictable clinical outcome without the need for a temporary restoration.
摘要：
保守的修复方法有助于保留被广泛破坏的重要牙齿的剩余牙齿结构。此病例报告描述了一种用于在后牙中放置陶瓷修复体的单预约椅旁技术。一名患者接受下颌右第一磨牙的治疗，具有断裂的树脂基复合修复体。由于重要纸浆的存在，恢复的程度，牙齿上有龋齿，提出了以下治疗方案:放置采用计算机辅助设计/计算机辅助制造工作流程制造的二硅酸锂玻璃陶瓷覆盖物。在牙医移除修复物并进行选择性龋齿去除后，结构分析指导颊尖的减少。立即使用2步自蚀粘合剂系统进行牙本质密封，放置1mm厚的可流动树脂基复合材料层作为树脂涂层。获得了数字印模，镶嵌修复是设计的，研磨二硅酸锂块,随后结晶。当onlay完成时，牙齿准备是喷砂的，选择性蚀刻，并涂有通用粘合剂。清洁并涂上底漆的凹版表面，上嵌体是用双重固化树脂水泥粘结的，并完成了咬合调整。在1个月和4个月的随访检查显示该病例的临床成功。从开始到结束，制作一次预约的椅子旁修复大约需要2.5小时。在这种情况下使用的技术提供了快节奏的工作流程，对于患者来说是舒适和实用的，并且提供了可预测的临床结果，而无需临时修复。
