Improved bonding of zirconia substructures to resin using a 鈥済laze-on鈥?technique

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• 作者：Peter Everson^a ; Owen Addison^b ; William M. Palin^c ; F.J. Trevor Burke^d ; ^{f.j.t.burke@bham.ac.uk}
• 关键词：Zirconia ; Bonding ; Ceramic ; Resin luting cement
• 刊名：Journal of Dentistry
• 出版年：2012
• 期刊代码：152_03005712
• 类别：med
• 出版时间：April, 2012
• 卷：40
• 期：4
• 页码：347-351
• 文件大小：1113 K

摘要

Objective

To investigate the influence of applying thin intermediary coatings of acid-etchable glasses on the shear bond strength between a methacrylate resin based cement and an yttria-stabilized zirconia dental ceramic substrate.

Methods

The upper and lower surfaces of 110 sintered yttria-stabilised tetragonal zirconia polycrystalline disc-shaped specimens were polished using sequential grades of Silicon Carbide, then air-abraded with 25 渭m diameter alumina particles. Specimens were randomly allocated to 11 groups (A-K) (n = 10), group A acting as control. The upper surface of Group A specimens was subjected to a tribochemical coating regime (CoJet, 3M ESPE). Five glazing ceramics were applied and fired according to the manufacturer's recommended firing regime. The glaze was etched with 10%HF acid and all specimens coated with a silane primer. Two differing storage regimes were employed (wet storage vs thermocycling). Shear bond strength testing specimens were created by cementing resin-based composite cylinders to the centre of the prepared ceramic surface using Rely-X Unicem (3M ESPE) resin based cement. Shear bond strength testing was performed and load at failure recorded.

Results

A factorial analysis of variance at a 95%significance level demonstrated that all glazing techniques resulted in a significant increase in the shear bond strength compared with using the resin based cement alone (P < 0.01), with the different glazing ceramics resulting in significant differences in mean shear bond strength (P = 0.008). The differences were a function of the storage state (wet storage vs thermocycling (P = 0.013)).

Conclusion

The glazing techniques used in the current investigation resulted in a significantly enhanced shear bond stress to the resin based cement when compared with the current 鈥榞old standard鈥?- tribochemical coating.