Altıer, MuhammedErol, FundaYıldırım, GulhanDALKILIÇ, EVRİM2020-10-302020-10-302018-07-01Altıer M., Erol F., Yıldırım G., DALKILIÇ E., -Fracture Resistance and Failure Modes of Lithium Disilicate or Composite Endocrowns-, NIGERIAN JOURNAL OF CLINICAL PRACTICE, cilt.21, ss.821-826, 2018http://hdl.handle.net/20.500.12645/27261https://www.njcponline.com/article.asp?issn=1119-3077;year=2018;volume=21;issue=7;spage=821;epage=826;aulast=AltierPurpose: The aim of this study was to determine the fracture strength of endocrowns made of lithium disilicate ceramic and two different indirect resin composites. Materials and Methods: Forty human mandibular molars were randomly separated into four groups (n = 10 in each group) -Group IN: control group, Group IPS: endocrowns made of lithium disilicate ceramic (IPS e. max CAD, IvoclarVivadent, Schaan, Liechtenstein); Group SL: Endocrowns made of Solidex microhybrid composite (Shofu, Ratingen, Germany); and Group GR: Endocrowns made of Grandia microhybrid composite (GC Europa, Leuven, Belgium). In all of the groups, dual-cure resin cement (Relyx Ultimate Clicker, 3M ESPE, St. Paul, MN, USA) was used to cement the endocrowns. All of the teeth were subjected to fracture by means of a universal testing machine (Instron), and compressive force was applied. The failure type and location after fracture were classified. The data were analyzed using one-way ANOVA, Tukey-s post hoc test, and Chi-square test (P 0.05). In Group SL, 80% of the specimens exhibited favorable fractures; also, 60% of the specimens exhibited favorable fracture in group GR, and only 10% of the specimens exhibited favorable fracture in group IPS. Conclusions: The lithium disilicate ceramic endocrowns exhibited higher fracture resistance than indirect composite groups. Both of the composite endocrowns showed more favorable failure than the lithium disilicate ceramic endocrowns.info:eu-repo/semantics/openAccessFracture ResistanceArticleWOS:0004390470000018505006980210.4103/njcp.njcp_175_1729984710