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Effect of deep margin elevation on fracture resistance of premolars restored with ceramic onlay: in vitro comparative study

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Effect of deep margin elevation on fracture resistance of premolars restored with ceramic onlay: in vitro comparative study

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dc.contributor.author Salah, Zahraa es
dc.contributor.author Sleibi, Ahmed es
dc.date.accessioned 2023-09-25T11:11:28Z
dc.date.available 2023-09-25T11:11:28Z
dc.date.issued 2023 es
dc.identifier.citation Salah, Z., & Sleibi, A. (2023). Effect of deep margin elevation on fracture resistance of premolars restored with ceramic onlay: In vitro comparative study. Journal of Clinical and Experimental Dentistry, 15(6), 446-453 es
dc.identifier.uri https://hdl.handle.net/10550/89568
dc.description.abstract This in vitro comparative study aimed to compare the influence of two levels of deep margin elevation (2 and 3 mm) with either bulk-fill flowable composite or short fiber-reinforced flowable composite on the fracture resistance of maxillary first premolars restored with ceramic onlays.Fifty sound-extracted maxillary first premolar teeth were selected to prepare mesio-occluso-distal cavities with standardized dimensions. The cervical margins were extended 2 mm below the cemento-enamel junction on both mesial and distal sides. These teeth were randomly divided into five groups: Group I: no box elevation (control group). Group II: 2 mm marginal elevation with bulk-fill flowable composite. Group III: 2 mm marginal elevation with short fiber-reinforced flowable composite. Group IV: 3 mm marginal elevation with bulk-fill flowable composite. Group V: 3 mm marginal elevation with short fiber-reinforced flowable composite. After cementation, all teeth were subjected to a fracture resistance test using the universal testing machine, and the mode of failure was analyzed using a digital microscope at 20x magnification.The result showed a non-significant difference in the fracture resistance between 2 and 3 mm marginal elevation (p>0.05) with respect to each restorative material used for deep margin elevation. However, the fracture resistance of teeth elevated with short fiber-reinforced flowable composite was significantly higher than those elevated with bulk-fill flowable composite at both levels 2 and 3 mm, p=0.041 and 0.038 respectively.The fracture resistance of premolars restored with a ceramic onlay was not influenced by the levels of deep margin elevation (2 or 3 mm). However, marginal elevation with short fiber-reinforced flowable composites provided higher fracture resistance than those elevated with bulk-fill flowable composites, and those without marginal elevation. es
dc.subject Fracture Resistance es
dc.subject Short fiber reinforced flowable composite es
dc.subject Bulk-fill flowable composite es
dc.subject Ceramic onlay es
dc.subject Cervical margin elevation es
dc.title Effect of deep margin elevation on fracture resistance of premolars restored with ceramic onlay: in vitro comparative study es
dc.type journal article es_ES
dc.subject.unesco UNESCO:CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.60384 es
dc.type.hasVersion VoR es_ES
dc.identifier.url http://www.medicinaoral.com/medoralfree01/aop/60384.pdf

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