Clinical prospective evaluation of zirconia-based three-unit posterior fixed dental prostheses: Up-to ten-year results.
Clinical prospective evaluation of zirconia-based three-unit posterior fixed dental prostheses: Up-to ten-year results.
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DOI：
10.1016/j.jdent.2016.01.014
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发表时间：
2016-04-01
影响因子：
4.4
通讯作者：
Bindl, Andreas
中科院分区：
文献类型：
--
作者：
Ioannidis, Alexis;Bindl, Andreas
目的：目前仅有少数研究评估全瓷FDP在后牙区域的临床长期行为。本前瞻性临床研究的目的是评价Y-TZP制作的后牙三单位义齿在使用10年后的临床表现。方法：55名患者在上颌或下颌后牙区接受59个三单位义齿。制备基牙，取全弓印模。制作了最终的铸件并对其进行了光学扫描。支架采用计算机辅助设计(CAD)和制造(CAM)技术制造。将Y-TZP支架贴面粘接到基牙上。应用修改后的美国公共卫生服务(USPHS)评级标准记录基线和随访检查(服务时间：>；=48个月)。累积生存率采用Kaplan-Meier法进行分析。结果：53例患者57个FDP参加了最后一次随访，其余患者的平均观察期为6.3+/-1.9年。生物并发症发生率为17.5%，技术性并发症发生率为28%。10年累计生存率达85.0%。3例失败，其中2例为基牙牙根折裂，1例为继发性龋病。结论：Y-TZP陶瓷贴面制作的三单元FDP是一种切削率高的治疗方法。然而，为了避免这种复杂性，现在的制造工艺被修改了。(C)爱思唯尔有限公司出版的2016年。
Objectives: Only a few studies exist, which assess the clinical long-term behavior of all-ceramic FDPs in the posterior region. The aim of the present prospective clinical study was to evaluate the clinical performance of posterior three-unit FDPs manufactured from Y-TZP after a service period up to 10 years.Methods: 55 patients received 59 three-unit FDPs in the posterior region of the maxilla or mandible. Abutment teeth were prepared and full-arch impressions were taken. Definitive casts were fabricated and optically scanned. Frameworks were fabricated with computer-aided design (CAD) and manufacturing (CAM) technology. Y-TZP frameworks were veneered and adhesively luted to the abutment teeth. Baseline and follow-up examinations (service time: >= 48 months) were recorded by applying modified United States Public Health Services (USPHS) rating criteria. Cumulative survival rate was analyzed with Kaplan-Meier. Percentage of biological and technical complication was calculated.Results: Fifty-three patients with 57 FDPs attended the last follow-up visit and a mean observation period of the remaining was 6.3 +/- 1.9 years was calculated. Biological complications occurred in 17.5%, technical complications in 28% of the FDPs. The 10-year cumulative survival rate amounted 85.0%. Three FDPs failed to survive, two due to a root fracture of the abutment tooth and one due to secondary caries.Conclusions: Three-unit FDPs made from Y-TZP, veneered with ceramic offer a treatment option with a high rate of chipping. However, the manufacturing processes nowadays are modified in order to avoid this complication. (C) 2016 Published by Elsevier Ltd.