Cam Seramik Endokronların Biyomekaniksel Özelliklerinin Preklinik ve Klinik Olarak Değerlendirilmesi

Abstract

Evaluation of biomechanicalproperties of glass-ceramicendocrownsclinicallyandpre-clinically. Hacettepe University Institute of Health Sciences, Ph.D. Thesis in Prosthodontics, Ankara, 2012.Inendodonticallytreatedteeth, traditionaltreatmentapproach is post-coreandcrownrestorations. Accordingtoevaluation of clinicalstudies, theretentionlossandfracture of post, androotfracturesarepossiblecomplications. Endocrownrestorationsarerestorationsthatareadhesivelybondedtotoothtissuewithoutrootsupportand has centralretensioncavityincludingpulpchamber. Thepurpose of thisstudy is toevaluatethesuccess of endocrownrestorations in endodonticallytreatedteethwithclinicalandpre-clinicalstudies. Inthisstudy, thebiomechanicalproperties of endocrownrestorationsmadebetweenOctober 2008 andDecember 2010wereevaluatedretrospectively. The data of 24 patientsand 29 endocrownswereevaluatedfor 30 months on average (20-46months). Accordingtoevaluation, twofracturedrestorationsandonedecementedrestorationwereobserved. Thevalues of periodontalpockets, plaqueindex, bleedingindex, amount of gingivalrecession, level of mobilityanddegree of furcationinvolvementweremeasuredbeforetherestorationtreatmentand in final controlappointmentsandthe data werestatisticallyevaluated. Onlythegingivalindexshowedstatisticallysignificantlowervalues (p<0.05). Periapicalradiographsweretaken in sixmonthsintervalswithparalleltechnique in ordertoevaluatecariesandmarginal fit of crowns. Ultimately, cariesandmarginaldiscrepancywere not seen in any of theteethobserved. Inthelastcontrolappointment, patientsatisfactionwasevaluatedusingvisual analog scale (VAS)in terms of estheticsandfunction. Patientsscored 8.8 foresthetics, 9.3 forfunction. Furthermore, endodonticallytreatedfirstlowermolarteethwithfourdifferentcavitiesweremodeledandresultingstresswerestudiedusing 3-D finite element analysiswhensubjectedtoobliqueandverticalloading.Furthermore, endodonticallytreatedfirstmolarteethwith 4 differentcavitiesweremodeledandresutingstresswerestudiedusing 3-D finite element analysiswhensubjectedtoobliqueandverticalloading. Endocrownrestorationsshowedsimilarstressloadsanddistributions.