$Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load$
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Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load

Abstract Objectives This study evaluated the effect of restoration occlusal design on the maximum fracture load and stress distribution of a feldspathic ceramic crown. Materials and Methods Twenty dentin analogues were used to simulate a full‐crown preparation. Next, 20 feldspathic crowns were mille...

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Autores principales:	Alexandre Luiz Souto Borges, João Paulo Mendes Tribst, Aline Lins deLima, Amanda Maria de Oliveira Dal Piva, Mutlu Özcan
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	CAD/CAM crown finite element analysis mandibular molar stress Dentistry RK1-715
Acceso en línea:	https://doaj.org/article/8c112d097cab45ecb156c6e58d4a6cf1
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spelling	oai:doaj.org-article:8c112d097cab45ecb156c6e58d4a6cf12021-12-02T12:59:21ZEffect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load2057-434710.1002/cre2.454https://doaj.org/article/8c112d097cab45ecb156c6e58d4a6cf12021-12-01T00:00:00Zhttps://doi.org/10.1002/cre2.454https://doaj.org/toc/2057-4347Abstract Objectives This study evaluated the effect of restoration occlusal design on the maximum fracture load and stress distribution of a feldspathic ceramic crown. Materials and Methods Twenty dentin analogues were used to simulate a full‐crown preparation. Next, 20 feldspathic crowns were milled according to the occlusal design parameter available in the CAD database (Young or Adult). The crowns were cemented with dual cure resin‐cement and loaded until fracture at 1 mm/min crosshead speed. Data were analyzed by using one‐way ANOVA and Tukey tests (p < 0.05). The same geometry and experimental setup was modeled and exported to the computer aided engineering software and tensile stress concentration was calculated using the finite element method with 300 N occlusal load simulation. Results The occlusal anatomy significantly influenced the load‐to‐fracture (p < 0.05). Adult design showed higher mean values (1149 ± 201 N) than Young design (454 ± 77 N). The maximum principal stress criteria showed similar stress pattern for both designs, however, the highest stress concentration was calculated for Young design (91 MPa) in the occlusal surface. Conclusions An anatomy design with reduced cusp angulation and less evident occlusal sulcus can reduce the stress concentration and increase the fracture load for feldspathic CAD/CAM posterior crowns.Alexandre Luiz Souto BorgesJoão Paulo Mendes TribstAline Lins deLimaAmanda Maria de Oliveira Dal PivaMutlu ÖzcanWileyarticleCAD/CAMcrownfinite element analysismandibular molarstressDentistryRK1-715ENClinical and Experimental Dental Research, Vol 7, Iss 6, Pp 1190-1196 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CAD/CAM crown finite element analysis mandibular molar stress Dentistry RK1-715
spellingShingle	CAD/CAM crown finite element analysis mandibular molar stress Dentistry RK1-715 Alexandre Luiz Souto Borges João Paulo Mendes Tribst Aline Lins deLima Amanda Maria de Oliveira Dal Piva Mutlu Özcan Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
description	Abstract Objectives This study evaluated the effect of restoration occlusal design on the maximum fracture load and stress distribution of a feldspathic ceramic crown. Materials and Methods Twenty dentin analogues were used to simulate a full‐crown preparation. Next, 20 feldspathic crowns were milled according to the occlusal design parameter available in the CAD database (Young or Adult). The crowns were cemented with dual cure resin‐cement and loaded until fracture at 1 mm/min crosshead speed. Data were analyzed by using one‐way ANOVA and Tukey tests (p < 0.05). The same geometry and experimental setup was modeled and exported to the computer aided engineering software and tensile stress concentration was calculated using the finite element method with 300 N occlusal load simulation. Results The occlusal anatomy significantly influenced the load‐to‐fracture (p < 0.05). Adult design showed higher mean values (1149 ± 201 N) than Young design (454 ± 77 N). The maximum principal stress criteria showed similar stress pattern for both designs, however, the highest stress concentration was calculated for Young design (91 MPa) in the occlusal surface. Conclusions An anatomy design with reduced cusp angulation and less evident occlusal sulcus can reduce the stress concentration and increase the fracture load for feldspathic CAD/CAM posterior crowns.
format	article
author	Alexandre Luiz Souto Borges João Paulo Mendes Tribst Aline Lins deLima Amanda Maria de Oliveira Dal Piva Mutlu Özcan
author_facet	Alexandre Luiz Souto Borges João Paulo Mendes Tribst Aline Lins deLima Amanda Maria de Oliveira Dal Piva Mutlu Özcan
author_sort	Alexandre Luiz Souto Borges
title	Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
title_short	Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
title_full	Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
title_fullStr	Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
title_full_unstemmed	Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load
title_sort	effect of occlusal anatomy of cad/cam feldspathic posterior crowns in the stress concentration and fracture load
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/8c112d097cab45ecb156c6e58d4a6cf1
work_keys_str_mv	AT alexandreluizsoutoborges effectofocclusalanatomyofcadcamfeldspathicposteriorcrownsinthestressconcentrationandfractureload AT joaopaulomendestribst effectofocclusalanatomyofcadcamfeldspathicposteriorcrownsinthestressconcentrationandfractureload AT alinelinsdelima effectofocclusalanatomyofcadcamfeldspathicposteriorcrownsinthestressconcentrationandfractureload AT amandamariadeoliveiradalpiva effectofocclusalanatomyofcadcamfeldspathicposteriorcrownsinthestressconcentrationandfractureload AT mutluozcan effectofocclusalanatomyofcadcamfeldspathicposteriorcrownsinthestressconcentrationandfractureload
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Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load

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