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The Chinese Journal of Dental Research

Edited by Xu Chen MA

Official journal of the Chinese Stomatological Association

ISSN (print) 1462-6446 • ISSN (online) 1867-5646

Publication:

Winter 2013
Volume 16 , Issue 2

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Effects of Different Surface Treatments on Ceramic Repairs with Composite

Huang, Bi Rong / Wang, Xiao Yan / Gao, Xue Jun

Pages: 111-117
PMID: 24436946

Objective: To compare different surface treatments of lithium disilicate-based ceramic on bond strengths to composite. Methods: Lithium disilicate-based ceramic microbars (1 mm 1 mm 6 mm) were produced and abraded using diamond (D) or CoJet sandblasting (C), etched using phosphoric acid (P) or hydrofluoric acid (H) and silanised (S). A total of 12 surface treatments were adopted: D, DP, DH, DS, DPS, DHS, C, CP, CH, CS, CPS and CHS. An adhesive resin (XP Bond) was then applied and a composite build-up was placed. All specimens were thermocycled 5,000 times and submitted to microtensile bond strength test (μTBS). Results were analysed using one-way analysis of variance and the Dunnett T3 test. Stereomicroscope and scanning electron microscopy were used to determine the failure modes.
Results: Surface roughening, acid etching and silanisation all have a significant influence on the ceramic-composite bond durability. Groups DH (30.7 6.5 MPa), DHS (32.0 8.2 MPa), CH (27.2 4.5 MPa) and CHS (29.2 5.5 MPa) showed the highest μTBS statistically. Groups DS (11.5 3.0 MPa) and DPS (9.7 2.2 MPa) had higher μTBS than groups D (4.5 2.9 MPa) and DP (5.2 3.0 MPa), while groups C (1.7 0.7 MPa), CS (1.7 0.9 MPa), CP (1.7 0.6 MPa) and CPS (1.7 1.1 MPa) showed the lowest μTBS.
Conclusion: Hydrofluoric acid etching was effective in improving the bond strength of composite to lithium disilicate-based ceramic, regardless of the method of surface roughening and silanisation.

Keywords: Ceramic repair, diamond, hydrofluoric acid, microtensile, silane

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