Tensile bond strength of composite to air-abraded dentin.
This study evaluated the influence of air abrasive treatment of dentin surfaces on the tensile bond strength between dentin and two different composite-adhesive-systems Multi-Purpose/Z100 and OptiBond FL/Herculite XR). The crowns of 200 maxillary central incisors were embedded in resin and then ground to expose a dentin surface 5 mm in diameter. The surfaces were etched or abraded by using a KCP 1000 device with different treatment conditions. Adhesive systems were applied according to the manufacturer's instructions and composite cylinders were bonded to the conditioned dentinal surface using a split mold. Tensile bond strength values and failure modes were then determined. Tensile bond strength values of the acid-etched dentin-composite-interface were significantly higher than for the interface between air-abraded dentin and composite, independent of the composite-adhesive-system used. The light microscopic evaluation showed mainly adhesive and combined adhesive-cohesive fractures. Significantly more adhesive fractures could be observed between abraded dentin and composite than between etched dentin and composite.
Geitel
Birgit
B
Department of Operative and Preventive Dentistry and Endodontics, Humboldt-University, Berlin (Charité), Germany. birgit.geitel@charite.de
Wischnewski
Regine
R
Jahn
Klaus-Roland
KR
Barthel
R Claudia
RC
Zimmer
Stefan
S
Roulet
Jean-François
JF
D000134:Acid Etching, Dental; D000268:Adhesiveness; D000388:Air; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D012822:Silicon Dioxide; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D015040:Zirconium
D003188:Composite Resins; D017220:Dentin-Bonding Agents; C469607:OptiBond FL; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C083568:Z100 composite resin; C065770:Herculite XR; D012822:Silicon Dioxide; D015040:Zirconium