TY - JOUR ID - TI - Comparison of marginal adaptation between all ceramic crown and full cast crown with two different luting cement (In Vitro study) AU - Dr. Salma Issa Alabudi B.D.S., M.Sc. د. سلمى عيسى AU - Dr. Jinan Qassim د. جنان قاسم AU - Dr. Shimaa Obied د. شيماء عبد PY - 2016 VL - 13 IS - 1 SP - 19 EP - 24 JO - MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان SN - 26188500 18138500 AB - The purpose of this study was to determine and evaluate the micro leakage and fit ofall ceramic crown and full cast metal crown using two different luting agent. Twentyfour recently caries free wisdom teeth were used .The teeth were cleaned and checked with magnifying lens.Noticed any cracks or caries . Specimens remained in distilled water at roomtemperature . Each specimen were centrally inserted in cylinder 20mm height and 20mminternal diameter containing self curing acrylic resin . Preparation were completed at thedentin level of the cement -enamel junction with a chamfer finish line 1.2mm all roundtooth . The height of preparation was 7mm with a convergence angle of six degree usingdiamond bur ( Germany, No 878, 2012) . Prepared teeth were divided in two maingroups ( n=6) .Group A: All ceramic crown(12-Specimens) . Subdivided in two subgroup.A1:- ( 6) Specimens used the zinc-phosphate cement. A2:- (6) Specimens used resincement . Group B :- Full cast crown (12-Specimens). Subdivided in tow subgroupGroup B1 :-( 6 ) Specimens used zinc-phosphate cement Group B2:- (6 ) Specimensused resin cement .After 24hr of storage in distilled water at 37c , all the specimens immersed in 0.5%basic fuchcin dye for 24hr.Fallowing removal from the solution , each tooth wasvertically sectioned bucco-lingually with water-cooled diamond disc . Stereomicroscopeat 40 magnification was to study the extent of microleakge, which was indicated by thedye pentration recorded at both metal-cement(MC) and tooth-cement ( TC) interface .Microleakge was done according to the index proposed by Tjan etel[1] .The data of all 4 groups was analyzed with one-way analysis of variance withstudent T-test was used to compare the microleakage scores within the groups at both theinterface. The data obtained in this study show statistically significant difference inmicroleakage level between group A and B and between subgroup of specimens.The conclusion of this study , resin cement recorded less micro leakage in both allceramic crown, and metal cast crown Than zinc – phosphate cement , because The self curing nature with low curing rate, give rapid and superior adhesion to both dentin andrestoration and better mechanical properties

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