Dental Oral Biology and Craniofacial Research最新文献

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Instrument Separation Outside the Root Canal: Handling Methods and Difficulties 根管外器械分离的处理方法与难点

Dental Oral Biology and Craniofacial Research Pub Date : 2020-02-19 DOI: 10.31487/j.dobcr.2020.01.06

B. Chen, Haijiang Liu, Ming-jiang Yi, Ming Wu, Xiao-ping Wang, Zhifeng Song

引用次数: 0

The Efficacy of a Novel Temporary Crown System Marginal Seal and Structural Durability in Terms of Cyclic Loading - A Pilot Study 一种新型临时冠系统边缘密封和结构耐久性在循环载荷方面的有效性-一项试点研究

Dental Oral Biology and Craniofacial Research Pub Date : 2020-01-28 DOI: 10.31487/j.dobcr.2020.01.01

C. Richardson, J. Choi, J. N. Waddell, Lin Zhou, Liza Yelyzaveta Tykhonova, Maykon Dias

{"title":"The Efficacy of a Novel Temporary Crown System Marginal Seal and Structural Durability in Terms of Cyclic Loading - A Pilot Study","authors":"C. Richardson, J. Choi, J. N. Waddell, Lin Zhou, Liza Yelyzaveta Tykhonova, Maykon Dias","doi":"10.31487/j.dobcr.2020.01.01","DOIUrl":"https://doi.org/10.31487/j.dobcr.2020.01.01","url":null,"abstract":"Background and objectives: There has been a lack of studies regarding the marginal seal and structural\u0000durability of a novel temporary crown system (Hi-tempo) manufactured from a polylactic (PLA) based resin\u0000thermoplastic material especially in terms of cyclic loading. Therefore, the purpose of this pilot study was\u0000to investigate the efficiency of this novel temporary crown system’s (Hi-tempo) marginal seal and structural\u0000durability in terms of cyclic loading.\u0000Methods: A crown preparation was duplicated in bovine teeth (n =15) using a copy mill machine. The\u0000specimens were divided into three groups and temporary crowns were fabricated that consisted of: control\u0000group, Luxatemp (bis-acrylic), Hi-tempo crown, PLA based and Hi-tempo window type crown, PLA based\u0000with resin cusps. Marginal dimensional change was measured before and after cyclic loading with a 93.36\u0000N force, 0.63 HZ, for 45360 cycles (stimulating 21 days in vivo) in water pigmented with a red dye. The\u0000marginal change was statistically analysed and the surface roughness was analysed using scanning electron\u0000microscopy (SEM).\u0000Results: Statistical significance (p<0.05) was found in the marginal changes of the control versus the Hitempo window and the Hi-tempo groups. SEM analysis revealed that the control crowns, had a much\u0000rougher surface with micro-cracks compared to PLA based crowns which had homogenous surfaces. All\u0000the specimens showed leakage of the red dye into the internal fitting surfaces of the crowns.\u0000Conclusions: The novel system showed promising and comparable results in terms of structural durability\u0000and marginal seal compared to the conventional system.","PeriodicalId":72781,"journal":{"name":"Dental Oral Biology and Craniofacial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46734242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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