In vitro evaluation of shear bond strength of orthodontic brackets bonded with different adhesives

Abstract

Background:There is necessary of dry operating field for bonding of orthodontic brackets. The presence of moisture can alter the bond strength. Hence, the aim of the present study was to evaluate the shear bond strength of orthodontic brackets with different adhesives.Materials and Methods:In this in vitro study, a total of 100 orthodontically extracted premolars with sound crown structure were divided into 4 equal groups of different primers. Bonding on the buccal surface of all teeth was done after acid etching with upper premolar brackets using different primers followed by light curing. Shear bond strength was evaluated with or without salivary contamination with both adhesives. A shear force for deboning the bracket was done with universal testing machine. The debonded specimens were examined at ×10 magnification to check site of bond failure and remaining adhesive on tooth using adhesive remnant index (ARI). The obtained data were statistically evaluated using SPSS 20 for Windows (SPSS Inc., Chicago, IL, USA) using ANOVA, Kolmogorov–Smirnov, and Levene's test at the statistical significance of P < 0.05.Results:Transbond Plus showed higher shear bond strength of 8.92 MPa under dry and 5.65 MPa with saliva contamination over Transbond XT of 7.24 MPa under dry and 2.43 MPa with saliva contamination, respectively. Higher ARI score was found without contamination in both adhesives.Conclusion:Transbond Plus hydrophilic resin had good shear bond strength under both dry and contamination condition compared to hydrophobic Transbond XT resin material.

The effect of incorporation Nano Cinnamon powder on the shear bond of the orthodontic composite (an in vitro study)

“…35,36 The applied force at fracture time was recorded in Newton then it was converted into megapascals (MPa) by dividing the debonding force by the surface area of the bracket. 37,38 The amount of the residual adhesive remained on the enamel surface was quantified by the adhesive remnant index (ARI). 39 After debonding, the teeth were examined under 10 × magnifications microscope.…”

Comparative evaluation and influence of new Optibond eXTRa self-etch Universal adhesive and conventional Transbond XT on shear bond strength of orthodontic brackets—An in vitro study

“…The demand for usage of various adhesives by dental practitioners has led to the emergence of newer universal self-etch adhesive systems (USEASs). [ 7 8 ] It has a less invasive pH (1.5<pH<3) and bonding employed with acidic functional monomers glycerol dimethacrylate dihydrogen phosphate (GPDM) and 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP), available in both self-etch and total-etch modes. When employed in a self-etch mode, USEASs may remarkably simplify the bonding procedure by decreasing the steps in bonding, number of eroded enamel rods, and eliminating the necessity for total acid etching.…”

Effect of the Incorporation of Chitosan and TiO2 Nanoparticles on the Shear Bond Strength of an Orthodontic Adhesive: An In Vitro Study

“…ARI is one of the most commonly used parameters for evaluating the quality of adhesion between the adhesive and the tooth and also between the adhesive and the bracket. 34 It is desirable that after debonding some adhesive is left on the tooth surface, thereby minimizing the damage of enamel surface during bracket removal procedures. The present study results showed that there were no significant differences concerning ARI at all the concentrations of chitosan NPs and TiO 2 NPs.…”