Tensile bond strength of composite to air-abraded enamel.
OBJECTIVE
The purpose of this study was to test the tensile bond strength of composite resin to enamel surfaces treated with kinetic cavity preparation (KCP) and acid etching, respectively.


METHODS
Plane labial surfaces of 280 human maxillary central incisors were treated with either KCP by varying treatment conditions or phosphoric acid gel. Composite samples were bonded to the pretreated surfaces with a bonding resin. After 24 hours specimens were loaded in tension in an Instron testing machine until bond failure. A two-way analysis of variance was used to determine significant differences. The failure sites were qualitatively evaluated by SEM.


RESULTS
The determined tensile bond strengths and observed failure modes demonstrated that acid-etched enamel has a significantly higher bond strength to composite resin than KCP-treated enamel surfaces.


CONCLUSIONS
KCP-prepared enamel has to be acid etched before bonding to composite resin.
Jahn
K R
KR
Department of Operative and Preventive Dentistry and Endodontics, Humboldt-University Berlin (Charité), Föhrer Str. 15, D-13353 Berlin, Germany.
Geitel
B
B
Kostka
E
E
Wischnewski
R
R
Roulet
J F
JF
D000134:Acid Etching, Dental; D020906:Air Abrasion, Dental / Q000379:methods*; D003188:Composite Resins; D001840:Dental Bonding; D003743:Dental Enamel; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D019279:Resin Cements; D013718:Tensile Strength
D003188:Composite Resins; C092987:Optibond; D019279:Resin Cements