STUDY OF MARGINAL lNTEGRITY AND SHEAR. BOND STRENGTH OF A RESIN MODIFIED GLASS IONOMER RESTORATIVE MATERIAL

Abstract

This study was carried out to compare

1 as. I I I I I I I I betweerr three

I esthetic restorative materials (Z 100 composite, photac-t:il and I Geristore) with regard to their microleakage, marginal integf.ity and I shear bond strength to dentin. I I I ! Materials and Methods I I I • Thirty extracted human premolar teeth were used\ for

microleakage testing. I

• Thirty extracted human premolar teeth were used for mJrginal I integrity testing.

• Thirty extracted human molar teeth were used for shear ;bond I strength testing. , . I I I For microleakage and marginal integrity tests a clal:jS V I preparation was made on the buccal surface of the premolar teeth 1 I mm above the cervical line. Cavities were divided into tHree I subgroups of ten teeth, each filled with one of the three materials. I

\ I Thermocycling of all teeth was done. Dye penetration method I was used to assess microleakage as teeth were immersed in' 1% 1 basic fuchsin dye for 24 hour then teeth were cut longitudinally b.nd I examined by microscope. 1 I