title: Effect of Tuf-Coat on Feldspathic porcelain materials.
abstract: Ion exchange has been shown to increase the fracture strength of not only industrial glasses but also dental porcelains. Tuf-Coat, an ion exchange material, has been introduced as a simple method to strengthen dental porcelain restorations. Our experimental investigation aims to evaluate the effect of the ion exchange (Tuf-Coat) on the flexural strengths of specimens made with Vita VMK 68, Ceramco veneer, IPS and Matchmaker body porcelain. Eighty specimens were fabricated as discs 13 mm in diameter and 2 mm thick according to manufacturers' recommendations. Specimens were tested using a universal testing machine with a crosshead speed of 0.5 mm/min. by a method of biaxial flexural strength test. The results were evaluated using one-way variance analysis and 'Student's t' test to compare results at P < 0.05 level. Among the porcelains tested only Vita VMK 68 has been statistically affected by the ion exchange method Tuf-Coat.
authors.affiliation: Department of Fixed Prosthodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Seha Mirkelam
authors.forename: S
authors.initials: S
authors.lastname: Pamuk
authors.forename: M C
authors.initials: MC
authors.lastname: Balkaya
authors.forename: G
authors.initials: G
authors.lastname: Akgüngör
mesh_terms: D003722:Dental Alloys / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000379:methods; D006801:Humans; D007474:Ion Exchange; D008422:Materials Testing / Q000379:methods; D018583:Pliability; D019279:Resin Cements; D013696:Temperature; D013718:Tensile Strength
chemical_list: D003722:Dental Alloys; C092621:Ivoclar Universal Cement; D019279:Resin Cements; D003776:Dental Porcelain; C058233:Ceramco; C047040:Vita VMK 68