Purpose: to evaluate theeffectof two occlusalpreparation designsand threedifferent typesofceramicmaterials onthemarginalfitofbondedposteriorocclusalveneers.Statementof theproblem: Thinbondedposteriorocclusalveneersconstituteaconservativealternativeto traditionalmoreretentivecompletecoveragecrowns intreatmentofseverely worndentition. Materials and Methods: Sixty extracted humanmaxillary first molarswererandomly distributed into twoequalgroups,30 teeth foreachaccording to thepreparationdesignas following: Non-ferruleandFerrule (F). Eachofgroup (NFandF) weresubdivided into three subgroupsaccording to the typeofceramicmaterials:IPSe.max CAD (E),Lava™Ultimate CAD/CAM(L)andVITASUPRINITY® PC(S).Theocclusalveneerswerecementedover their respectiveteethwithresin cement TotalCem automix. Themarginalfitwasdeterminedby usingstereomicroscopewithdigitalcamerausingcomputersoftwarefortakingfourpointson eachaxialsurfaceofthe restoration so; therearesixteen readingspereachsample.Results: the meanvalueofverticalmarginalgapofLavaUltimaterecordedlowervalueinnoferuleand ferulegroup (28.4±3.9/34.95±4.02) respectively whichconsideredstatically significant differencefrom thantheothertwomaterials,followedbyIPSEmaxCadinferulegroup(49.7±5.6) then VITASUPRINITY in feruleandno ferule(50.8±7.43/51.9 ±3.70)respectively, then finallyIPSEmaxCad inno ferulegroup (52.4±5.5). Conclusion:Within the limitationof this study,itconcluded that, LavaUltimate occlusalveneers represent themoreadequate material to achievebettermarginaladaptabilityhowever,themarginalgapofthethreematerialswere within the clinicalacceptance range
(2017). A comparative study on the effect of different preparation designs and type of materials on the marginal fit of occlusal veneer. Al-Azhar Journal of Dental Science, 20(1), 15-20. doi: 10.21608/ajdsm.2020.107485
MLA
. "A comparative study on the effect of different preparation designs and type of materials on the marginal fit of occlusal veneer". Al-Azhar Journal of Dental Science, 20, 1, 2017, 15-20. doi: 10.21608/ajdsm.2020.107485
HARVARD
(2017). 'A comparative study on the effect of different preparation designs and type of materials on the marginal fit of occlusal veneer', Al-Azhar Journal of Dental Science, 20(1), pp. 15-20. doi: 10.21608/ajdsm.2020.107485
VANCOUVER
A comparative study on the effect of different preparation designs and type of materials on the marginal fit of occlusal veneer. Al-Azhar Journal of Dental Science, 2017; 20(1): 15-20. doi: 10.21608/ajdsm.2020.107485
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