Forensic and reliability analyses of fixed dental prostheses.
Forensic and reliability analyses of fixed dental prostheses.
复制标题
固定义齿的法医学鉴定与可靠性分析。
DOI：
10.1002/jbm.b.34796
复制
发表时间：
2021-09
影响因子：
3.4
通讯作者：
Esquivel-Upshaw, Josephine F.
中科院分区：
文献类型：
--
作者：
Mecholsky, John J.;Hsu, Shu-Min;Jadaan, Osama;Griggs, Jason;Neal, Daniel;Clark, Arthur E.;Xia, Xinyi;Esquivel-Upshaw, Josephine F.
本文描述了在一项三单元桥的临床研究中，确定失败种植体支持的固定牙修复体(FDPs)失败原因的方案。本文给出了两种贴面材料(白榴石增强贴面和氟磷灰石微晶玻璃贴面)和Y-TZP氧化锆核贴面在不同应力速率下不同贴面成分的弯曲杆加载结果。根据这些结果，使用快速加载条件的强度来确定这些材料的断裂韧性。对相同材料的弯曲杆和选定的FDP进行的分维测量表明，杆件和FDP的分维值是相同的。这使得可以使用弯曲杆的断裂韧性值来确定FDP的强度。然后对临床获得的FDP复制品进行失效分析，以确定引发骨折的裂缝的大小。利用挠曲杆的信息和失效FDP的起裂裂纹大小，确定了FDP的强度。临床上的失败很可能是由于初始超载和初始裂纹后继续使用而导致的反复裂纹扩展的结果。
This article describes the protocol for determining the cause of failure for retrieved failed implant supported fixed dental prostheses (FDPs) in a clinical study of three-unit bridges. The results of loading of flexure bars of different veneer compositions at different stress rates were presented for two veneer materials (leucite reinforced and fluorapatite glass–ceramic veneers) and a Y-TZP core zirconia ceramic used in the clinical study. From these results, the strengths of the fast loading conditions were used to determine the fracture toughness of these materials. Fractal dimension measurements of the flexure bars and selected FDPs of the same materials demonstrated that the values were the same for both the bars and the FDPs. This allowed the use of fracture toughness values from the flexure bars to determine the strengths of the FDPs. The failure analysis of clinically obtained FDP replicates to determine the size of the fracture initiating cracks was then performed. Using the information from the flexure bars and the size of the fracture initiating cracks for the failed FDPs, the strengths of the FDPs were determined. The clinical failures were determined to be most likely the result of repeated crack growth due to initial overload and continuous use after initial cracking.
登录
查看更多内容
影响因子：
1.9
作者：
Lin, Chun-Li;Chang, Yen-Hsiang;Huang, Shao-Fu
通讯作者：
Huang, Shao-Fu
DOI：
10.6028/jres.115.024
发表时间：
2010-09
影响因子：
1.5
作者：
Quinn JB;Quinn GD;Sundar V
通讯作者：
Sundar V
DOI：
10.1111/j.1532-849x.2012.00913.x
发表时间：
2013-04
期刊：
Journal of prosthodontics : official journal of the American College of Prosthodontists
影响因子：
--
作者：
Esquivel-Upshaw J;Rose W;Oliveira E;Yang M;Clark AE;Anusavice K
通讯作者：
Anusavice K
影响因子：
14
作者：
De Aza, AH;Chevalier, J;Torrecillas, R
通讯作者：
Torrecillas, R
影响因子：
2.1
作者：
Saarva, Veronika Norstrom;Bjerkstig, Goran;Svanborg, Per
通讯作者：
Svanborg, Per