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In vitro investigation of the impact of remaining tooth structure on the tensile failure loads of overdenture copings

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In vitro investigation of the impact of remaining tooth structure on the tensile failure loads of overdenture copings

dc.contributor.author	Fotiou, Anna	es
dc.contributor.author	Kamalakidis, Savvas N.	es
dc.contributor.author	Pissiotis, Argirios	es
dc.contributor.author	Michalakis, Konstatinos X.	es
dc.date.accessioned	2020-02-04T13:25:52Z
dc.date.available	2020-02-04T13:25:52Z
dc.date.issued	2019	es
dc.identifier.uri	https://hdl.handle.net/10550/72874
dc.description.abstract	The purpose of this in vitro study was to evaluate the impact of the remaining tooth structure on the retention of overdenture cast metal copings. A freshly extracted intact mandibular human canine (length 25 mm) was selected and endodontically treated. An incisal reduction of 4 mm with no ferrule preparation was performed and a post space of 12 mm was created. By using polyvinyl siloxane duplication material and autopolymerizing polymethylmethacrylate resin, ten resin teeth analogs (control group) were obtained. A second set of ten resin teeth analogs (group 1) was created by preparing on the original natural tooth a 360o ferrule design of 1 mm in height and by using the same procedural technique. The canine was further reduced by an additional 1 mm, resulting in a ferrule of 2 mm in height, measured from the initial incisal reduction, thus a third set of ten resin teeth analogs (group 2) was created. For every tooth analog in all groups a dome-shaped metal coping was cast and luted with a glass ionomer cement. All specimens were subjected to tensile load testing until decementation occurred. The specimens in the control group exhibited a mean failure load of 87.21 ± 18.26 N, while the 1 mm ferrule group recorded a higher mean failure load of 125.43 ± 8.79 N and the 2 mm ferrule group recorded the highest mean failure load of 146.12 ± 23.38 N. One-way ANOVA revealed significant differences (F= 28.04, p<0.001) in the tensile failure loads between all of the groups being tested. The metal copings with a 2 mm ferrule design exhibited the highest retention values, followed by the 1 mm ferrule and the no ferrule design, with the differences among them being statistically significant.	es
dc.source	Fotiou, Anna ; Kamalakidis, Savvas N. ; Pissiotis, Argirios ; Michalakis, Konstatinos X.. In vitro investigation of the impact of remaining tooth structure on the tensile failure loads of overdenture copings. En: Journal of Clinical and Experimental Dentistry, 11 11 2019: 1006-1011	es
dc.title	In vitro investigation of the impact of remaining tooth structure on the tensile failure loads of overdenture copings	es
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::CIENCIAS MÉDICAS	es
dc.identifier.doi	10.4317/jced.56228	es
dc.type.hasVersion	VoR	es_ES