Orthodontic bracket bonding to glazed full-contour zirconia
곽지영, 정효경, Choi Il-Kyung, 권태엽,
소속 상세정보
곽지영 ( Kwak Ji-Young ) - Kyungpook National University Graduate School Department of Medical & Biological Engineering
정효경 ( Jung Hyo-Kyung ) - Daegu Health College Department of Dental Laboratory Technology
( Choi Il-Kyung ) - Kyungpook National University Graduate School Department of Medical & Biological Engineering
권태엽 ( Kwon Tae-Yub ) - Kyungpook National University School of Dentistry Department of Dental Biomaterials
KMID : 1034420160410020106
Abstract
Objectives: This study evaluated the effects of different surface conditioning methods on the bond strength of orthodontic brackets to glazed full-zirconia surfaces.
Materials and Methods: Glazed zirconia (except for the control, Zirkonzahn Prettau) disc surfaces were pre-treated: PO (control), polishing; BR, bur roughening; PP, cleaning with a prophy cup and pumice; HF, hydrofluoric acid etching; AA, air abrasion with aluminum oxide; CJ, CoJet-Sand. The surfaces were examined using profilometry, scanning electron microscopy, and electron dispersive spectroscopy. A zirconia primer (Z-Prime Plus, Z) or a silane primer (Monobond-S, S) was then applied to the surfaces, yielding 7 groups (PO-Z, BR-Z, PP-S, HF-S, AA-S, AA-Z, and CJ-S). Metal bracket-bonded specimens were stored in water for 24 hr at 37℃, and thermocycled for 1,000 cycles. Their bond strengths were measured using the wire loop method (n = 10).
Results: Except for BR, the surface pre-treatments failed to expose the zirconia substructure. A significant difference in bond strengths was found between AA-Z (4.60 ± 1.08 MPa) and all other groups (13.38 ± 2.57 - 15.78 ± 2.39 MPa, p < 0.05). For AA-Z, most of the adhesive remained on the bracket.
Conclusions: For bracket bonding to glazed zirconia, a simple application of silane to the cleaned surface is recommended. A zirconia primer should be used only when the zirconia substructure is definitely exposed.
키워드
Adhesive; Bonding; Orthodontic brackets; Zirconia
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