Department of Clinical Odontostomatology, University of Padova, Institute of Clinical Dentistry, Padova, Italy.
J Prosthodont. 2012 Jun;21(4):265-9. doi: 10.1111/j.1532-849X.2011.00825.x. Epub 2012 Feb 19.
PURPOSE: The purpose of this prospective clinical study was to determine the success rate of single-unit posterior fixed dental prostheses (FDPs) with zirconia copings generated with two CAD/CAM systems, compared to porcelain-fused-to-metal (PFM) single-unit posterior FDPs after 5 years of function. MATERIALS AND METHODS: From 2005 to 2006, 60 patients who needed a single-unit FDP on a first molar in the mandibular jaw (left or right) in a private office setting were included in this study. The 60 first mandibular molars were randomly divided into three groups (n = 20): in the control group (group C), 20 PFM FDPs were included. In the other two groups CAD/CAM technology was used for the fabrication of the zirconium-oxide copings: 20 single-unit posterior FDPs with zirconia copings were generated with the Procera system (group P, Nobel Biocare); 20 single-unit posterior FDPs with zirconia copings were generated with the Lava system (group L, 3M ESPE). For the ANOVA follow-up data, the clinical life table method was applied. The statistical analysis was performed using two nonparametric tests, the log-rank test for k-groups and the Fisher exact test. RESULTS: No statistically significant difference in the clinical outcome of zirconia-ceramic FDPs of both groups (P and L) evaluated together and metal-ceramic posterior single FDPs was found at 5 years of function; however, clinical data showed that technical problems, such as extended fracture of the veneering ceramic, tended to occur more frequently in the zirconia-ceramic FDP groups. The difference in the frequency of failure was statistically significant only in the comparison of groups C and P. CONCLUSIONS: Even if no statistically significant difference in the clinical outcome of zirconia-ceramic FDPs of both groups (P and L) considered together and metal-ceramic posterior single FDPs was found at 5 years of function, clinical data showed that the two zirconia-ceramic FDP groups tended to have more frequent clinical problems: for this reason all the clinical and technical variables related to the use of zirconia-ceramic FDPs generated with CAD/CAM systems should be carefully considered prior to all treatment procedures.
目的：本前瞻性临床研究的目的是比较两种 CAD/CAM 系统制作的氧化锆全瓷覆盖体单冠与金属烤瓷熔附全冠在后牙区修复 5 年的成功率。 材料与方法：本研究共纳入 2005 年至 2006 年在私人诊室就诊的 60 名下颌第一磨牙（左侧或右侧）需要单冠修复的患者。60 颗下颌第一磨牙随机分为三组（每组 20 颗）：对照组（C 组），纳入 20 颗金属烤瓷熔附全冠；另外两组使用 CAD/CAM 技术制作氧化锆基底：20 颗氧化锆基底全瓷单冠由 Procera 系统（Nobel Biocare）制作（P 组）；20 颗氧化锆基底全瓷单冠由 Lava 系统（3M ESPE）制作（L 组）。对于方差分析随访数据，采用临床寿命表法。采用两种非参数检验，即 k 组对数秩检验和 Fisher 确切检验进行统计学分析。 结果：在 5 年的随访中，两组（P 组和 L 组）氧化锆全瓷单冠和金属烤瓷熔附全冠的临床结果无统计学差异，但临床数据显示，在氧化锆全瓷单冠组，技术问题如饰面陶瓷的扩展断裂更常发生。只有在 C 组和 P 组的比较中，失败频率的差异才有统计学意义。 结论：即使在 5 年的随访中，两组（P 组和 L 组）氧化锆全瓷单冠和金属烤瓷熔附全冠的临床结果无统计学差异，但临床数据显示，两种氧化锆全瓷单冠组更常出现临床问题：因此，在进行所有治疗程序之前，应仔细考虑与 CAD/CAM 系统制作的氧化锆全瓷单冠相关的所有临床和技术变量。
Int J Prosthodont. 2009
J Adv Prosthodont. 2021-10
Compend Contin Educ Dent. 2021-10
Dent Mater. 2020-1-27
Zotero 插件