Orthodontic bracket bonding without previous adhesive priming: A meta-regression analysis

Abstract

Objective: To determine the consensus among studies that adhesive resin application improves the bond strength of orthodontic brackets and the association of methodological variables on the influence of bond strength outcome. Materials and Methods: In vitro studies were selected to answer whether adhesive resin application increases the immediate shear bond strength of metal orthodontic brackets bonded with a photo-cured orthodontic adhesive. Studies included were those comparing a group having adhesive resin to a group without adhesive resin with the primary outcome measurement shear bond strength in MPa. A systematic electronic search was performed in PubMed and Scopus databases. Results: Nine studies were included in the analysis. Based on the pooled data and due to a high heterogeneity among studies (I 2 5 93.3), a meta-regression analysis was conducted. The analysis demonstrated that five experimental conditions explained 86.1% of heterogeneity and four of them had significantly affected in vitro shear bond testing. The shear bond strength of metal brackets was not significantly affected when bonded with adhesive resin, when compared to those without adhesive resin. Conclusions: The adhesive resin application can be set aside during metal bracket bonding to enamel regardless of the type of orthodontic adhesive used. (Angle Orthod. 2016;86:391-398.)

Influence of adhesive and bonding material on the bond strength of bracket to bovine tooth

“…These results are in line with previous study, which also found significant differences between the groups with and without adhesives 13 . However, a recent study showed that brackets fixed without adhesive presented a debonding rate after 12 months similar to that of brackets fixed with adhesive 15,16 . Other study showed that the penetration of the liquids into narrow capillaries, such as microporosities of etched enamel was influenced by properties of the liquid, such as viscosity and the surface free energy of the capillary wall 17 .…”

Effect of Yd:YAG laser irradiation on the shear bond strength of orthodontic metal brackets

“…The literature has shown that size and design of the bracket base affect the bond strength to the enamel. 4,5,14,20,23,[6][7][8][9][10][11][12][13] Altmann et al 4 showed that bracket base area is an important variable in SBS. Also, it is known that the bracket base curvature should adapt to the tooth surface, allowing small thickness of resin between the base and the enamel, otherwise it could result in a weak interface due to the inherent mechanical properties of the resin.…”

“…Also, it is known that the bracket base curvature should adapt to the tooth surface, allowing small thickness of resin between the base and the enamel, otherwise it could result in a weak interface due to the inherent mechanical properties of the resin. 4 Finite element analysis provided a clearer insight of the stress distribution and showed that the greater bracket base adaptation on the tooth surface, the distribution of forces along its surface will be more uniform. 24 In addition, laser parameters such as power, wavelength, frequency, scanning speed and original article Moreira FC, Jacob HB, Vaz LG, Guastaldi AC the exposure of the bracket surface area, can promote different outcomes for SBS.…”

“…Factors affecting the bracket bond strength on enamel have been extensively studied, including: specimen storage time, enamel conditioning procedures, masticatory forces, adhesive systems, and bracket-related factors (such as size, structure of the mesh, and material of the bracket base). 1,[4][5][6][7][8] Previous studies reported that the bond failure of the metal bracket to tooth enamel frequently occurs at the adhesive/bracket base interface. 2,3,5,[8][9][10][11][12] Bracket base design plays an important role in terms of the bond strength to the tooth enamel.…”

Effect of Rebonding on the Bond Strength of Orthodontic Tubes: A Comparison of Light Cure Adhesive and Resin-Modified Glass Ionomer Cement In Vitro

“…Composite adhesive systems can cause enamel loss up to 10  μ m [8]. Since metal brackets are opaque, light activation for 20 seconds may not be enough, while light activation for 40 seconds can increase the bond strength approximately by 9-10 MPa and create excessively firm bonding in some enamel areas [9]. The other problem with composite resin bonded orthodontic brackets and tubes is decalcification of the enamel and white spot lesions.…”