title: The effect of resin composite pins on the retention of class IV restorations.
abstract: Standardized Class IV cavity preparations were made in 48 human incisors. They were then divided into three groups of 16 teeth each. Group 1 was prepared with no internal retentive features. Groups 2 and 3 included an internal pin channel prepared with a #330 and a #329 bur, respectively. All specimens were restored with a micro-hybrid resin-based composite restorative material and a fifth generation dentin bonding system. Specimens were loaded to failure in an Instron Universal Testing Machine perpendicular to the long axis of the teeth. There was no evidence to suggest a difference in force required to dislodge the restoration among the three groups tested (p=0.185). Resin composite pins do not increase the retention of Class IV resin composite restorations.
authors.affiliation: Lackland AFB, Texas 78236-5551, USA.
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Muhlbauer
authors.forename: William J
authors.initials: WJ
authors.lastname: Dunn
authors.forename: Howard W
authors.initials: HW
authors.lastname: Roberts
authors.forename: David F
authors.initials: DF
authors.lastname: Murchison
mesh_terms: D000134:Acid Etching, Dental; D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D003737:Dental Cavity Preparation / Q000145:classification / Q000295:instrumentation; D003743:Dental Enamel / Q000648:ultrastructure; D003772:Dental Pins; D003775:Dental Polishing; D017268:Dental Prosthesis Retention; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000379:methods; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C451600:OptiBond Solo Plus; D019279:Resin Cements