Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China.
BMC Oral Health. 2022 Jun 16;22(1):236. doi: 10.1186/s12903-022-02273-4.
Computer aided design/computer aided manufacturing (CAD/CAM) zirconia post-cores is one of the options of post crown restoration materials due to their esthetic properties and superior mechanical strength. However, the clinical effect on aesthetics and strength properties is unclear due to the lack of results of their long-term follow-up.
This retrospective clinical study aims to analyze the survival rate, clinical manifestations, and failure factors after CAD/CAM zirconia post-core restoration.
Clinical and radiographic examinations were performed on 342 patients with 400 teeth for 3-6 years postsurgical follow-up examination. The patients were all received CAD/CAM zirconia post-cores and all-ceramic crowns at the Department of Prosthodontics in the public hospital. The retrospective outcomes were conducted after zirconia post restoration, including survival rate by Kaplan-Meier analysis and findings of manifestations and failure factors. The effects of gender and dental position on survival rate were analyzed by Cox-Mantel Test.
This study retrospectively evaluated 261 teeth from 229 patients with a 35% drop-out rate. The survival rate was 96.0%, and the success rate was 92.4%. According to the tooth position classification, the survival rate was 100% for 101 anterior teeth, 95.4% for 69 premolars, and 88.3% for 91 molars. According to gender, the survival rate of the male group was 92.3%, while that of the female group was 98.0%, with a significant difference (P < 0.01). The complications included crown fracture (1.9%) periapical inflammation (1.9%), crown debonding (1.1%), percussion abnormal (1.9%) and root fracture (0.8%).
Within the limitations of this retrospective study, it can be concluded that CAD/CAM zirconia post-cores are clinically promising. Compared with the posterior teeth, CAD/CAM zirconia post-cores are more suitable for anterior teeth.
计算机辅助设计/计算机辅助制造（CAD/CAM）氧化锆桩核是后牙冠修复材料的选择之一，因其具有美学特性和卓越的机械强度。然而，由于缺乏长期随访结果，其在美学和强度性能方面的临床效果尚不清楚。
本回顾性临床研究旨在分析 CAD/CAM 氧化锆桩核修复后的生存率、临床表现和失败因素。
对 342 名患者的 400 颗牙齿进行了临床和影像学检查，随访时间为手术后 3-6 年。所有患者均在公立医院修复科接受 CAD/CAM 氧化锆桩核和全瓷冠修复。对氧化锆桩修复后的回顾性结果进行了分析，包括 Kaplan-Meier 分析的生存率以及临床表现和失败因素的发现。采用Cox-Mantel 检验分析性别和牙位对生存率的影响。
本研究回顾性评估了 229 名患者的 261 颗牙齿，失访率为 35%。生存率为 96.0%，成功率为 92.4%。根据牙齿位置分类，前牙的生存率为 100%（101 颗），前磨牙为 95.4%（69 颗），磨牙为 88.3%（91 颗）。根据性别，男性组的生存率为 92.3%，女性组为 98.0%，差异有统计学意义（P<0.01）。并发症包括冠折（1.9%）、根尖周炎（1.9%）、冠脱落（1.1%）、叩诊异常（1.9%）和根折（0.8%）。
在本回顾性研究的限制范围内，可以得出结论，CAD/CAM 氧化锆桩核具有临床应用前景。与后牙相比，CAD/CAM 氧化锆桩核更适合前牙。
