title: Microleakage of two new dentinal bonding systems.
abstract: Class V abrasion and erosion lesions restored with composite resin seem to be more susceptible to microleakage, because the gingival margin is usually placed in cementum and/or dentin. The purpose of this study was to evaluate the microleakage, in vitro, of two new dentinal bonding systems along with a positive and negative control. This study was accomplished using extracted human teeth and a calcium-45 radioisotope technique. The teeth were examined for microleakage at periods of 1 week, 6 months, and 1 year. The results at all time intervals indicated that the cavities restored with the new bonding agents and their respective composite resins leaked more than did the negative control, glass-ionomer cement.
authors: University of Mississippi, School of Dentistry, Jackson 39216.
authors: J G
authors: JG
authors: Fitchie
authors: G W
authors: GW
authors: Reeves
authors: A R
authors: AR
authors: Scarbrough
authors: J H
authors: JH
authors: Hembree
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements; D003763:Dental Leakage; D003804:Dentin; D005899:Glass Ionomer Cements; D005976:Glutaral; D006801:Humans; D008298:Maleates; D011109:Polymethacrylic Acids; D014072:Tooth Abrasion; D014077:Tooth Erosion
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; D008298:Maleates; D011109:Polymethacrylic Acids; C036885:prisma-fil; C040964:Ketac-Fil; C044372:Gluma; D005976:Glutaral