In vivo debonding strength and enamel damage in two orthodontic debonding methods

Brosh, Tamar; Kaufman, Assaf; Balabanovsky, Alex; Vardimon, Alexander D.

doi:10.1016/j.jbiomech.2004.05.025

Cited by 38 publications

(51 citation statements)

References 25 publications

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“…Light curing was performed for 20 seconds (10 seconds on the mesial side and 10 seconds on the distal side) using a light-emitting diode unit light (Ortholux, 3M Unitek). At the end of orthodontic treatment, a total of 1168 brackets were removed using the wings method, 21 which involves gently squeezing the mesial and distal wings with bracket-removal pliers (Ormco Corporation, Glendora, Calif). Because debonding is an operator-dependent procedure, the results may vary between operators; to avoid this limitation, all clinical procedures were carried out by only one operator.…”

Section: Methodsmentioning

confidence: 99%

Bracket base remnants after orthodontic debonding

Zanarini

Gracco

Lattuca

et al. 2013

The Angle Orthodontist

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Objective: To evaluate whether the debonding procedure leads to restitutio ad integrum of the enamel surface by investigating the presence of enamel within the bracket base remnants after debonding. Materials and Methods: Sixty patients who completed orthodontic treatment with fixed appliances were included. A total of 1068 brackets were microphotographed; the brackets presenting some remnants on the base (n 5 818) were selected and analyzed with ImageJ software to measure the remnant area. From this population a statistically significant sample (n 5 100) was observed under a scanning electron microscope to check for the presence of enamel within the remnants. Energy dispersive x-ray spectrometry was also performed to obtain quantitative data. Results: Statistically significant differences in the remnant percentage between arches were observed for incisor and canine brackets (P , .0001 and P 5 .022, respectively). From a morphologic analysis of the scanning electron micrographs the bracket bases were categorized in 3 groups: group A, bases presenting a thin enamel coat (83%); group B, bases showing sizable enamel fragments (7%); group C, bases with no morphologic evidence of enamel presence (10%). Calcium presence was noted on all evaluated brackets under energy dispersive x-ray spectrometry. No significant difference was observed in the Ca/Si ratio between group A (16.21%) and group B (18.77%), whereas the Ca/Si ratio in group C (5.40%) was significantly lower than that of the other groups (P , .323 and P 5 .0001, respectively). Conclusion: The objective of an atraumatic debonding is not achieved yet; in some cases the damage could be clinically relevant. (Angle Orthod. 2013;83:885-891.)

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Section: Methodsmentioning

confidence: 99%

Bracket base remnants after orthodontic debonding

Zanarini

Gracco

Lattuca

et al. 2013

The Angle Orthodontist

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“…It must also accommodate tooth movement control during orthodontic treatment. The bond strength should allow for bracket de-bonding without causing damage to the enamel surface (Pickett et al, 2001;Brosh et al, 2005;Chen et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Finite element sub-modeling analyses of damage to enamel at the incisor enamel/adhesive interface upon de-bonding for different orthodontic bracket bases

Lin¹,

Huang²,

Tsai

et al. 2011

Journal of Biomechanics

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“…Because in vitro bond strength cannot be correlated with clinical failure indexes, 9 and facing the necessity of creating a method to test the effects of the oral medium on the composite resins used in orthodontics, different devices have been developed to measure the bracket debonding force in vivo 10 12 Usually, strain gauges are bonded to the handle 10 or to the arm of the pliers 11 …”

Section: Introductionmentioning

confidence: 99%

Prototype to measure bracket debonding force in vivo

Tonus

Manfroi

Borges

et al. 2017

Dental Press J. Orthod.

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Introduction: Material biodegradation that occurs in the mouth may interfere in the bonding strength between the bracket and the enamel, causing lower bond strength values in vivo, in comparison with in vitro studies. Objective: To develop a prototype to measure bracket debonding force in vivo and to evaluate, in vitro, the bond strength obtained with the prototype.Methods: A original plier (3M Unitek) was modified by adding one strain gauge directly connected to its claw. An electronic circuit performed the reading of the strain gauge, and the software installed in a computer recorded the values of the bracket debonding force, in kgf. Orthodontic brackets were bonded to the facial surface of 30 bovine incisors with adhesive materials. In Group 1 (n = 15), debonding was carried out with the prototype, while tensile bond strength testing was performed in Group 2 (n = 15). A universal testing machine was used for the second group. The adhesive remnant index (ARI) was recorded.Results: According to Student’s t test (α = 0.05), Group 1 (2.96 MPa) and Group 2 (3.08 MPa) were not significantly different. ARI score of 3 was predominant in the two groups.Conclusion: The prototype proved to be reliable for obtaining in vivo bond strength values for orthodontic brackets.

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In vivo debonding strength and enamel damage in two orthodontic debonding methods

Cited by 38 publications

References 25 publications

Bracket base remnants after orthodontic debonding

Bracket base remnants after orthodontic debonding

Finite element sub-modeling analyses of damage to enamel at the incisor enamel/adhesive interface upon de-bonding for different orthodontic bracket bases

Prototype to measure bracket debonding force in vivo

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