دورية أكاديمية
Effect of cavity preparation design and ceramic type on the stress distribution, strain and fracture resistance of CAD/CAM onlays in molars.
| العنوان: | Effect of cavity preparation design and ceramic type on the stress distribution, strain and fracture resistance of CAD/CAM onlays in molars. |
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| المؤلفون: | Vianna ALSV; Departamento de Prótese e Materiais Odontológicos, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil., Prado CJD; Departamento de Prótese e Materiais Odontológicos, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil., Bicalho AA; Escola Técnica de Saúde, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil., Pereira RADS; Departamento de Dentística e Materiais Odontológicos, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil., Neves FDD; Departamento de Oclusão, Prótese Fixa e Materiais Odontológicos, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil., Soares CJ; Departamento de Dentística e Materiais Odontológicos, Faculdade de Odontologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brasil. |
| المصدر: | Journal of applied oral science : revista FOB [J Appl Oral Sci] 2018; Vol. 26, pp. e20180004. Date of Electronic Publication: 2018 Aug 20. |
| نوع المنشور: | Evaluation Study; Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Faculdade de Odontologia de Bauru, USP Country of Publication: Brazil NLM ID: 101189774 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1678-7765 (Electronic) Linking ISSN: 16787757 NLM ISO Abbreviation: J Appl Oral Sci Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Bauru, SP : Faculdade de Odontologia de Bauru, USP, [2003]- |
| مواضيع طبية MeSH: | Computer-Aided Design* , Tooth Fractures*, Aluminum Silicates/*chemistry , Ceramics/*chemistry , Dental Cavity Preparation/*methods , Dental Porcelain/*chemistry , Inlays/*methods, Acrylic Resins/chemistry ; Analysis of Variance ; Composite Resins/chemistry ; Dental Restoration Failure ; Dental Stress Analysis ; Elastic Modulus ; Finite Element Analysis ; Humans ; Materials Testing ; Molar ; Polyurethanes/chemistry ; Reference Values ; Reproducibility of Results ; Statistics, Nonparametric |
| مستخلص: | Objective This study aimed to evaluate the effect of the cavity preparation and ceramic type on the stress distribution, tooth strain, fracture resistance and fracture mode of human molar teeth restored with onlays. Material and Methods Forty-eight molars were divided into four groups (n=12) with assorted combinations of two study factors: BL- conventional onlay preparation with boxes made from leucite ceramic (IPS-Empress CAD, Ivoclar Vivadent); NBL- conservative onlay preparation without boxes made from leucite ceramic; BD- conventional onlay preparation with boxes made from lithium disilicate glass ceramic (IPS e.max CAD, Ivoclar Vivadent); NBL- conservative onlay preparation with boxes made from lithium disilicate glass ceramic cuspal deformation (µS) was measured at 100 N and at maximum fracture load using strain gauge. Fracture resistance (N) was measured using a compression test, and the fracture mode was recorded. Finite element analysis was used to evaluate the stress distribution by modified von Mises stress criteria. The tooth strain and fracture resistance data were analyzed using the Tukey test and two-way ANOVA, and the fracture mode was analyzed by the chi-square test (α=0.05). Results The leucite ceramic resulted in higher tooth deformation at 100 N and lower tooth deformation at the maximum fracture load than the lithium disilicate ceramic (P<0.001). The lithium disilicate ceramic exhibited higher fracture resistance than the leucite ceramic (P<0.001). The conservative onlay resulted in higher fracture strength for lithium disilicate ceramic. Finite element analysis results showed the conventional cavity preparation resulted in higher stress concentration in the ceramic restoration and remaining tooth than the conservative onlay preparation. The conservative onlays exhibited increased fracture resistance, reduced stress concentration and more favorable fracture modes. Conclusion Molars restored with lithium disilicate CAD-CAM ceramic onlays exhibited higher fracture resistance than molars restored with leucite CAD-CAM ceramic onlays. |
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| المشرفين على المادة: | 0 (Acrylic Resins) 0 (Aluminum Silicates) 0 (Composite Resins) 0 (IPS e.max CAD LT) 0 (IPS-Empress ceramic) 0 (Polyurethanes) 0 (Vivadent) 0 (lithia disilicate) 12001-21-7 (Dental Porcelain) 1302-34-7 (leucite) |
| تواريخ الأحداث: | Date Created: 20180823 Date Completed: 20180906 Latest Revision: 20191210 |
| رمز التحديث: | 20240628 |
| مُعرف محوري في PubMed: | PMC6110459 |
| DOI: | 10.1590/1678-7757-2018-0004 |
| PMID: | 30133672 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1678-7765 |
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| DOI: | 10.1590/1678-7757-2018-0004 |