title: [The effect of adhesive agents on the bonding strength of ceramic-composite. An in-vitro comparative study with 6 "porcelain primers" and a control group].
abstract: Orthodontic brackets were bonded to a total of 240 Biodent porcelain surfaces pretreated with a number of different porcelain primers. In a control group, 40 surfaces were pumiced, etched, rinsed and dried, and then bonded to similar brackets without the use of a primer. The test objects of group 1 (n = 140) and those of group 2 (n = 40) were tested for bond shearing strength in a material testing machine (Zwick 1441) after prior incubation in a corrosive fluid at a pH of 2.3 and a temperature of 37 degrees C for 24 hours and 21 days, respectively. The fracture sites were inspected and analysed. Incubation in corrosive fluid reduces the strength of the porcelain-composite bonding, the shearing strength and the number of fractures in the bonding decreasing. Damage to the porcelain was seen to occur after the use of Lee-Ortho-Prime and Bond-Por primers. All the primers tested can be used, although a bond shearing strength of less than 2 N/mm2 is at the lower limit of what can be accepted under the usual conditions of daily practice.
authors.affiliation: Poliklinik für Kieferorthopädie, Universität zu Köln.
authors.forename: S
authors.initials: S
authors.lastname: Pies
authors.forename: B
authors.initials: B
authors.lastname: Kahl
authors.forename: C W
authors.initials: CW
authors.lastname: Schwarze
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D008422:Materials Testing; D009967:Orthodontic Appliances
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D003776:Dental Porcelain
vernacular_title: Einfluss von Haftvermittlern auf die Verbundstärke Keramik--Composite. Eine In-vitro-Vergleichsstudie mit sechs "porcelain primern" und einer Vergleichsgruppe.