Influence of surface treatment on the resin-bonding of zirconia
Küçük Resim Yok
Tarih
2015
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Objective. To compare the effect of various surface treatments on the bonding of luting resin cements to zirconia under four-point bending. Methods. Bar specimens (n = 200) (2 mm x 5 mm x 25 mm) were prepared from zirconia blocks (VITA In-Ceram YZ, Vita Zahnfabrik) with the cementation surface (2 mm x 5 mm) of groups of 40 treated in one of five ways: airborne particle abrasion with 50 mu m Al2O3 (GB), zirconia primer (Z-Prime Plus, Bisco) (Z), glaze ceramic (Crystall.Glaze spray, Ivoclar Vivadent) + hydrofluoric acid (GHF), fusion glass-ceramic (Crystall.Connect, Ivoclar Vivadent) (CC), or left untreated as control (C). Within each treatment, bars were cleaned ultrasonically for 15 min in ethanol and then deionized water before bonding in pairs with one of two luting resins: Panavia F 2.0, (Kuraray) (P); RelyX U-200 (3 M/Espe) (R), to form 10 test specimens for each treatment and lute combination. Mechanical tests were performed and bond strengths (MPa) were subject, after log transformation, to analysis of variance, Shapiro-Wilk and Holm-Sidak tests; also log-linear contingency analysis of failure mode distribution; all with alpha=0.05. Fracture surfaces were examined under light and scanning electron microscopy. Results. While the effect of surface treatment was significant (p = 1.27 x 10(-9)), there was no detected effect due to resin (p = 0.829). All treatments except CC (30.1 MPa x/divided by+1.44)* were significantly better than the untreated control (24.8 MPa x/divided by 1.35) (p = 3.28 x 10(-9)). While the effect of GB - which gave the highest mean strength (50.5 MPa x/divided by 1.29) - was not distinguishable from that of GHF (39.9 MPa x/divided by 1.29) (p = 0.082), it was significantly better than treatment with either CC or Z (33.1 MPa x/divided by 1.48) (p < 0.05). (*After log transformation for analysis and back; asymmetric error bounds as s.d. in log values.). Significance. The novel test method design, which has good discriminatory power, confirmed the value of gritblasting as a simple and effective treatment with low operator hazard. It gave the highest bond strengths regardless of the cement type. Glaze layer application followed by hydrofluoric acid-etching on zirconia before cementation might be viable for adhesive zirconia cementation, but represents a much greater hazard as well as having problems with thickness control. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Zirconia surface treatment, Adhesive cementation, Four-point bending test
Kaynak
Dental Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
31
Sayı
6
