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Influence of Abutment Material on the Stress of Implant-supported all-ceramic Single Crown

Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 96-99页

作者：高少怀 DUAN Haiying 李智勇 Department of Prosthodontics School and Hospital of StomatologyWuhan UniversityWuhan 430079China Department of Stomatology Wuhan Central Hospital of China Construction Third Engineering Bureau Co.Ltd.Wuhan 430079China

In order to investigate the influence of abutment material on the stress of implant-supported all-ceramic single crown, a 3D finite element model of implant-supported mandibular first premolar was computed by COSMOS/M 2.85 software. Alumina, zirconia, and titanium were used as abutment materials respectively. Vertical 600 N and horizontal 225 N load was applied on the occlusal surface. The results show that the stress distribution of implant-supported single crown was similar for different abutment materials. Maximum stresses within the crown were higher when titanium abutment was used. Maximum stress of titanium abutment was lower than that of ceramic abutment. Within the screw and fixture, maximum stresses had no difference under vertical loading but higher as titanium abutment was used under horizontal loading. There was no difference of maximum stress within the bone when different abutment materials were used. The present findings indicate that the abutment material had no influence on the stress distribution of implant-supported all- ceramic single crown but maximum stress when the titanium abutment was lower than that of ceramic abutment.

关键词： finite element analysis dental implant stress all-ceramic abutment

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Influence of Different Luting Agents on the Stress Distributions of Implant-supported all-ceramic Single Crown

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1227-1230页

作者： GAO Shaohuai WANG Min DUAN Haiying LI Qing LI Zhiyong Department of Prosthodontics School and Hospital of StomatologyWuhan University Department of Implantology School and Hospital of StomatologyWuhan University Department of Stomatology Wuhan Central Hospital of China Construction Third Engineering Bureau Co. Ltd

The purpose of this study was to investigate the influence of different luting agents on the stress distribution within the crown, abutment and peri-implant bone of implant-supported all-ceramic single crown. A three-dimensional finite element model of an implant-supported single crown for the first premolar of mandible was created by COSMOS 2.85. Resin-modified glass ionomer and two different resin adhesives were used to cement the crown and abutment. Vertical 600 N and horizontal 225 N loads were applied to stimulate the condition of chewing. The stress distributions within the all-ceramic crown, abutment and peri-implant bone were analyzed. The experimental results show that the stress distributions of all-ceramic crown, abutment, implant and peri-implant bone were similar when different luting agents were used. The result of present study indicated that luting agents had no influence on the stress distributions of implant-supported all-ceramic single crown.

关键词： stress distributions dental implants luting agent all-ceramic

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维普期刊数据库

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Tooth wear against ceramic crowns in posterior region: a systematic literature review

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International Journal of Oral Science 2013年第4期5卷 183-190页

作者： Rim Hmaidouch Paul Weigl Department of Prosthodontics and Geriatric Dentistry Johann Wolfgang Goethe University

The objective of this systematic review was to assess tooth wear against ceramic crowns in posterior region in vitro and in vivo. An electronic PubMed search was conducted to identify studies on tooth wear against ceramic crowns in posterior region. The selected studies were analyzed in regard to type of crowns, natural antagonist, measuring protocol and outcome. From a yield of 1 000 titles, 43 articles were selected for full-text analysis; finally, no in vitro and only five in vivo studies met the inclusion criteria. As there is heterogeneity in design, used measuring method, ceramics and analysis-form, a meta-analysis was not possible. Results of these studies are very controversial which makes a scientifically valid comparison impossible. This review indicated that some all-ceramic crowns are as wear friendly as metal-ceramic crowns. Up to now, it has been impossible to associate tooth wear with any specific causal agent. The role of ceramic surface treatment that might be responsible for the changing in rate of tooth wear seems undetermined as yet through clinical trials. The literature reveals that studies on this topic are subject to a substantial amount of bias. Therefore, additional clinical studies, properly designed to diminish bias, are warranted.

关键词： all-ceramic crowns tooth wear

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