Debonding Case Study

1805 Words8 Pages
COMPARISON OF SHEAR BOND STRENGTH, ADHESIVE REMNANT INDEX OF METAL AND CERAMIC BRACKETS BY USING EUCALYPTUS GEL AS A CHEMICAL SOLVENT: IN VITRO STUDY INTRODUCTION: Once orthodontic therapies with fixed appliances are completed, the bonded brackets and residual adhesive must be removed. Ideally, the debonding procedure would lead to restitution of the tooth enamel, or at least, the enamel surface could be restored, as closely as possible, to its original state.However, when the bracket debonding process is inadequate, the enamel is injured, which results cracks and fractures in the enamel surface. This condition leads tooth sensitivity, and it increases the risk of caries and pulp inflammation. Therefore, it is important to evaluate an appropriate…show more content…
Enhancing the bonding forces is always considered important in the development of orthodontic adhesives. However, at the end of orthodontic treatment, the superior forces may lead to problems during debonding. To meet patient’s expectations in clinical practice, we expected to achieve a decrease in the bonding forces of adhesive resins without the use of any additional equipment or device but by simply applying chemical reagents to reduce patient’s discomfort during the debonding procedure.2 The concern for enamel damage is especially critical when debonding ceramic brackets. Several complications have been encountered during debonding of these brackets, such as enamel tear outs, fractures, cracks and bracket failure due to high bonding resistance and their high elastic modulus in comparison to metal brackets as well as their low flexibility and higher fragility. Previous studies reported different methods for removing brackets, such as mechanical methods; chemical solvents; ultrasonic scalars; and lasers. Among these methods, the mechanical removal methods are most widely used in clinical practice. Successful debonding process relies on maintaining an intact enamel structure without producing iatrogenic…show more content…
Removal of adhesive remnant and rebonding brackets without repeated etching does not provide adequate shear bond strength.6 Chien et al in 2014 studied “Effect of the gel form of eucalyptol on the shear bonding forces of orthodontic brackets” studied on two types of brakcets metal and ceramic and two kinds of gels forms were used lubrajel and carbopol 941 and concluded that the most efficient way to reduce shear bonding forces between a metal orthodontic bracket and a tooth surface during a debonding procedure may be to use eucalyptol mixed with Carbopol for 15 minutes.2 Chien et al in 2016 studied “An investigation of the effects of chemical reagents on shear bonding forces of orthodontic metal brackets” studied on 50 extracted premolar using eucalyptus oil immersion for 10 minutes and concluded that After the brackets are immersed in eucalyptus oil for 10 minutes, the bonding forces were reduced and consequently lead to the minimum force required for debonding.3

More about Debonding Case Study

Open Document