Comparison of Debonding Characteristics of the Conventional Metal and Self-Ligating Brackets to Enamel: An in Vitro Study

Abstract

Background: Brackets' debonding without any damage to the teeth is very important. Objectives: The aim of this study was to compare the debonding characteristics of the metal conventional and self-ligating brackets. Patients and Methods: 69 maxillary premolars were randomly assigned in 3 groups. Metal brackets of Damon, In Ovation and conventional systems were bonded to the teeth. The brackets were debonded with debonding pliers. Debonding strengths, adhesive remnant index, and enamel damage were evaluated. A Zwick model universal testing machine was used to measure debonding strengths. The debonding strength values were statistically analyzed by one-sided analysis of variance while the increase in the enamel crack numbers and length and the remained adhesive index were analyzed by chi-square test. Results: The means of the debonding strength in the brackets of in ovation, damon and conventional systems were 15.22, 11.4 and 8.67 MPa respectively. Significant differences were observed regarding debonding strength between three types of brackets (all: P < 0.001). After debonding of in ovation, damon and stainless steel brackets; the increased numbers of the enamel cracks were noted in 26.06%, 21.74% and 17.39% cases respectively. Also, the increased cracks lengths were demonstrated in 47.83%, 39.13%, and 30.43% cases. No significant differences were observed regarding the increase of the enamel cracks number and length and the amounts of residual adhesive on the teeth. Conclusions: The debonding characteristics of the metal self-ligating were comparable to the conventional brackets.

In vitro Analysis of Shear Bond Strength and Adhesive Remnant Index of Stainless Steel Brackets with Different Adhesive Systems to Enamel

“…The micromechanical bond which connects the adhesive agent to the acid-etched enamel causes loss of enamel at adhesiveenamel interface due to adhesive failure. 12 From the present study, the Transbond XT's mean shear bond strength was shown to be 15.33 MPa; the findings are similar to that of Pickett et al 13 and Arnold et al 14 study, which showed Transbond XT's mean shear bond strength to be 9.7 MPa. Scougall Vilchis et al 15 study, which compared the Transbond Plus with Transbond Plus and three other self-etching adhesives, showed that the Transbond XT's mean shear bond strength was highest of about 19.0 MPa compared with Transbond Plus (16.6 MPa) and other three adhesives.…”

Comparison Of Shear Bond Strength And Adhesive Remnant Index Between Different Adhesive Systems In Bonding and Rebonding of Orthodontic Brackets

“…10 The increase in bond strength causes the failure during the removal of the brackets; as desired, it will ensure that it is in the bracket -adhesive interface instead of in the adhesive or in the adhesive -enamel interface. 11 Many different adhesive systems are used in the literature for bonding orthodontic brackets. However, a study evaluating the bond strength of three different adhesive systems used in our study to orthodontic brackets has not been found in the literature.…”

Effectiveness of dental monitoring system in orthodontics: A systematic review

“…The reduction of in-office appointments showed that remote monitoring, such as DM, may constitute an advantage, especially for those recent orthodontic techniques that do not require such close follow-up. This is the case with self-ligating appliances (Soltani et al, 2015), where low friction brackets and light orthodontic forces allow lengthening of appointment intervals so that complete expression of the information contained in the wire is obtained (Impellizzeri et al, 2020). Other examples are orthodontic therapies carried out with aligners, that do not necessarily require a monthly interaction between patient and provider, unless an orthodontic emergency occurs.…”