Fracture analysis of randomized implant-supported fixed dental prostheses.
Fracture analysis of randomized implant-supported fixed dental prostheses.
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DOI：
10.1016/j.jdent.2014.07.001
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发表时间：
2014-10
影响因子：
4.4
通讯作者：
Anusavice KJ
中科院分区：
文献类型：
--
作者：
Esquivel-Upshaw JF;Mehler A;Clark AE;Neal D;Anusavice KJ
后牙固定全瓷修复体的折断可由一个或多个因素引起，包括修复体设计、缺陷分布、咬合载荷的方向和大小、支持基础结构的性质(牙根/种植体)以及邻牙的存在。这项种植支持的全陶瓷固定牙修复体的临床研究，确定了牙齿存在于最远端固位体的位置；修复体沿非承重区或承重区的载荷；修复体中存在偏转接触或最大间隙接触；以及咬合力的大小对贴面陶瓷骨折的发生的影响。89颗种植体支持的FDP被随机分为两组，一组是三单元后牙金属陶瓷(Au-Pd-Ag合金和内嵌POM、Ivoclar、Vivadent)FDP，另一组是陶瓷-陶瓷(ZirCAD和ZirPress、Ivoclar、Vivadent)FDP。有两种种植体(Osseospeed，Dentsply)和定制基牙(Atlantis，Dentsply)支持这些FDP，这些FDP是用树脂粘固剂(RelyX Universal Cement)粘结的。拍摄基线照片，测量牙齿的最大牙尖周度(MI)和偏转功能。分别于术后6个月和1~3年进行随访。观察骨折，记录骨折的位置，并将图像与咬合接触的基线照片进行比较。骨折的发生与咬合力的大小、固位体最远端远端的牙齿以及承重区或非承重区的接触之间没有明显的关系。然而，仅在有心肌梗死接触的区域发生骨折的可能性明显更高。这项临床研究表明，由于牙周韧带的缺失，种植体支持的假体与天然牙齿支持的假体有必要进行不同的咬合评估。种植体支持的修复体应该比自然牙列支持的修复体具有最小的咬合和更轻的接触。
Fractures of posterior fixed dental all-ceramic prostheses can be caused by one or more factors including prosthesis design, flaw distribution, direction and magnitude of occlusal loading, and nature of supporting infrastructure (tooth root/implant), and presence of adjacent teeth. This clinical study of implant-supported, all-ceramic fixed dental prostheses, determined the effects of presence of a tooth distal to the most distal retainer; prosthesis loading either along the non-load bearing or load bearing areas; presence of excursive contacts or maximum intercuspation contacts in the prosthesis; and magnitude of bite force on the occurrence of veneer ceramic fracture. 89 implant-supported FDPs were randomized as either a three-unit posterior metal-ceramic (Au-Pd-Ag alloy and InLine POM, Ivoclar, Vivadent) FDP or a ceramic-ceramic (ZirCAD and ZirPress, Ivoclar, Vivadent) FDP. Two implants (Osseospeed, Dentsply) and custom abutments (Atlantis, Dentsply) supported these FDPs, which were cemented with resin cement (RelyX Universal Cement). Baseline photographs were made with markings of teeth from maximum intercuspation (MI) and excursive function. Patients were recalled at 6 months and 1 to 3 years. Fractures were observed, their locations recorded, and images compared with baseline photographs of occlusal contacts. No significant relationship exists between the occurrence of fracture and: the magnitude of bite force; a tooth distal to the most distal retainer; and contacts in load-bearing or non-load-bearing areas. However, there was a significantly higher likelihood of fracture in areas with MI contacts only. This clinical study demonstrates that there is a need to evaluate occlusion differently with implant-supported prostheses than with natural tooth supported prostheses because of the absence of a periodontal ligament. Implant supported prostheses should have minimal occlusion and lighter contacts than ones supported by natural dentition.
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影响因子：
4.4
作者：
Schmitter, M.;Mueller, D.;Rues, S.
通讯作者：
Rues, S.
影响因子：
5
作者：
Kosmac, T;Oblak, C;Marion, L
通讯作者：
Marion, L
影响因子：
5
作者：
Guazzato, M;Albakry, M;Swain, MV
通讯作者：
Swain, MV
影响因子：
2.9
作者：
Sequeros, OG;Garcia, VCG;Cartagena, AG
通讯作者：
Cartagena, AG
DOI：
10.1016/s0889-5406(05)81576-8
发表时间：
1991-05-01
影响因子：
3
作者：
ANDERSEN, KL;PEDERSEN, EH;MELSEN, B
通讯作者：
MELSEN, B