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The effect of different cooling rates and coping thicknesses on the failure load of zirconia-ceramic crowns after fatigue loading

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dc.contributor.author김선재-
dc.contributor.author김지환-
dc.contributor.author심준성-
dc.date.accessioned2018-07-20T08:11:44Z-
dc.date.available2018-07-20T08:11:44Z-
dc.date.issued2017-
dc.identifier.issn2005-7806-
dc.identifier.urihttps://ir.ymlib.yonsei.ac.kr/handle/22282913/160947-
dc.description.abstractPURPOSE: The purpose of this study was to evaluate the influence of different coping thicknesses and veneer ceramic cooling rates on the failure load of zirconia-ceramic crowns. MATERIALS AND METHODS: Zirconia copings of two different thicknesses (0.5 mm or 1.5 mm; n=20 each) were fabricated from scanning 40 identical abutment models using a dental computer-aided design and computer-aided manufacturing system. Zirconia-ceramic crowns were completed by veneering feldspathic ceramics under different cooling rates (conventional or slow, n=20 each), resulting in 4 different groups (CONV05, SLOW05, CONV15, SLOW15; n=10 per group). Each crown was cemented on the abutment. 300,000 cycles of a 50-N load and thermocycling were applied on the crown, and then, a monotonic load was applied on each crown until failure. The mean failure loads were evaluated with two-way analysis of variance (P=.05). RESULTS: No cohesive or adhesive failure was observed after fatigue loading with thermocycling. Among the 4 groups, SLOW15 group (slow cooling and 1.5 mm chipping thickness) resulted in a significantly greater mean failure load than the other groups (P<.001). Coping fractures were only observed in SLOW15 group. CONCLUSION: The failure load of zirconia-ceramic crowns was significantly influenced by cooling rate as well as coping thickness. Under conventional cooling conditions, the mean failure load was not influenced by the coping thickness; however, under slow cooling conditions, the mean failure load was significantly influenced by the coping thickness.-
dc.description.statementOfResponsibilityopen-
dc.languageEnglish-
dc.publisherKorean Academy of Prosthodontics-
dc.relation.isPartOfJOURNAL OF ADVANCED PROSTHODONTICS-
dc.rightsCC BY-NC-ND 2.0 KR-
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/2.0/kr/-
dc.titleThe effect of different cooling rates and coping thicknesses on the failure load of zirconia-ceramic crowns after fatigue loading-
dc.typeArticle-
dc.contributor.collegeCollege of Dentistry-
dc.contributor.departmentDept. of Prosthodontics-
dc.contributor.googleauthorYu Lung Tang-
dc.contributor.googleauthorJee-Hwan Kim-
dc.contributor.googleauthorJune-Sung Shim-
dc.contributor.googleauthorSunjai Kim-
dc.identifier.doi10.4047/jap.2017.9.3.152-
dc.contributor.localIdA00558-
dc.contributor.localIdA01006-
dc.contributor.localIdA02211-
dc.relation.journalcodeJ01223-
dc.identifier.eissn2005-7814-
dc.identifier.pmid28680545-
dc.subject.keywordCooling rate-
dc.subject.keywordCoping thickness-
dc.subject.keywordFailure-
dc.subject.keywordZirconia-
dc.contributor.alternativeNameKim, Sun Jai-
dc.contributor.alternativeNameKim, Jee Hwan-
dc.contributor.alternativeNameShim, June Sung-
dc.contributor.affiliatedAuthorKim, Sun Jai-
dc.contributor.affiliatedAuthorKim, Jee Hwan-
dc.contributor.affiliatedAuthorShim, June Sung-
dc.citation.volume9-
dc.citation.number3-
dc.citation.startPage152-
dc.citation.endPage158-
dc.identifier.bibliographicCitationJOURNAL OF ADVANCED PROSTHODONTICS, Vol.9(3) : 152-158, 2017-
dc.identifier.rimsid60841-
dc.type.rimsART-
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers

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