Tensile bond strength of Er, Cr: YSGG laser-irradiated human dentin to composite inlays with two resin cements.
The purpose of this study was to investigate the tensile bond strength of composite inlays to human dentin with two different cavity preparation tools (bur versus Er, Cr: YSGG laser) and with two different bonding procedures (total-etch: Variolink II versus self-etch: Maxcem). The specimens were divided into four groups: bur-cut/Variolink II, bur-cut/Maxcem, laser-ablated/Variolink II, and laser-ablated/Maxcem. The following characteristics were then investigated: morphological change, dentin-resin cement interface, surface roughness, and tensile bond strength. Results demonstrated that the tensile bond strengths of the four groups were 19.11 +/- 5.88 MPa, 8.54 +/- 2.38 MPa, 13.72 +/- 3.43 MPa, and 12.11 +/- 3.71 MPa, respectively. We concluded that Variolink II provided higher tensile bond strength to composite inlays than Maxcem. On the other hand, the bond strength of Variolink II with dentin cavity prepared by Er, Cr: YSGG laser was statistically lower than that prepared by bur.
Tseng
Wan-Yu
WY
Graduate Institute of Clinical Dentistry, College of Medicine, National Taiwan University and National Taiwan University Hospital, No. 1, Chang-Te Street, Taipei 10016, Taiwan.
Chen
Min-Huey
MH
Lu
Hui-Hsin
HH
Lin
Chii-Wann
CW
Hsieh
Tseng-Ting
TT
Chen
Chun-Hao
CH
Lai
Juin-Yih
JY
Lee
Bor-Shiunn
BS
D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D000328:Adult; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000295:instrumentation; D003799:Dental Stress Analysis; D003804:Dentin / Q000648:ultrastructure; D003806:Dentin Permeability; D006801:Humans; D007284:Inlays; D053844:Lasers, Solid-State; D019279:Resin Cements; D013499:Surface Properties; D013718:Tensile Strength
D003188:Composite Resins; C515955:Maxcem; D019279:Resin Cements; C103502:Variolink