The relationship between base dimensions, force to failure, and shear bond strengths of bondable molar tubes

Abstract

Objectives: To compare forces versus failure and shear bond strengths, and to explore their association with the base dimensions of four currently available bondable molar tubes. Materials and Methods: Tubes were bonded to hydroxyapatite discs using a conventional lightcured adhesive and were tested to shear failure with the Instron Universal testing machine. Results were analyzed using the Kruskal-Wallis test and regression and survival analyses. Results: No statistical difference was observed between the four groups globally in terms of force to failure (P 5 .059) and bond strength (P 5 .179). However, regression analysis showed that each 1 mm 2 increase in base surface area required an additional force of 3.11 N to debond the tube. Survival analysis showed that the tube with the greatest base dimensions had the best survival with increasing force to failure. Conclusions: Although a relationship was demonstrated between force to failure and base surface area, it was not a simple one. No statistically significant relationship was found between bond strength and base surface area. (Angle Orthod. 2012;82:536-540.)

Influence of fluoride releasing light cured resin coat on enamel mineralization and survival of metallic brackets in orthodontic patients: A 12-months

“…Success of such a technique depends on the bond strength between enamel and bracket. The bond strength is potentially affected by many factors including; etchant type and time, adhesive composition, mode of curing, bracket type, and base design [3][4][5] . Several primers and adhesives of different composition and curing modes have been developed with the purpose of enhancing the bond strength and reducing the failure rates of the brackets [6][7][8] .…”

The effect of saliva and blood contamination on the bond characteristics of metal bracket bonded by light cured cyanoacrylate adhesive

“…The bond strength is potentially affected by many factors including; etchant type and time, adhesive composition and mode of curing and bracket type and base design. [3][4][5][6][7] The ideal adhesive system should provide bond strength high enough to withstand forces of orthodontic appliances as well as masticatory forces. On the other hand, debonding should be done easily without any deleterious effects on the enamel such as fractures or cracking.…”

“…On the other hand, debonding should be done easily without any deleterious effects on the enamel such as fractures or cracking. 5 Reynolds suggested a range of 6-8 MPa for clinically successful bonding. 8 The bonding procedures could be done in different situations that have negative deleterious effects on the bond strength and hence increase the faulier rate of the bonded brackets.…”

Influence of Prolonged Continuous Orthodontic Force on the Shear Bond Strength of Metallic Brackets Bonded With Various Adhesive Systems

“…[9][10][11] similarly, factors related to the oral environment such as masticatory forces, thermal changes, forces from orthodontic archwires and saliva contamination influenced the bond strength. [12][13][14] However, the majority of studies about bond strength were focused on its evaluation in first 24 hours after bonding and few studies were concerned about the loading effect on the brackets before testing the bond strength. The effect of applying 120 grams of force 30 minutes after bonding and continued for 24 hours was evaluated in a previous study.…”