Shear bond strength of metal brackets compared with a new ceramic bracket

Ødegaard, Jan; Segner, Dietmar

doi:10.1016/0889-5406(88)90028-5

Cited by 136 publications

(55 citation statements)

References 10 publications

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“…9 A greater risk of damage to the tooth surface occurs in cases of adhesive failure between resin and enamel. [9][10][11] This happens especially with the use of ceramic brackets, [12][13][14] but enamel fracture may also occur with metal brackets. 6,7 There are several important differences between in vitro and in vivo studies dealing with modes of bracket failure.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Bracket base remnants after orthodontic debonding

Zanarini

Gracco

Lattuca

et al. 2013

The Angle Orthodontist

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“…According to Odegaard and Segner, 23 the ceramic brackets showed superior SBS when compared with the metal brackets. Moreover, the failure site for the metal brackets mainly occurred in the bracket-adhesive interface, while the bond failure with the ceramic brackets occurred primarily in the enamel-adhesive interface.…”

Section: Discussionmentioning

confidence: 99%

Immediate and Delayed Effects of Diode Laser on Debonding of Ceramic Brackets: An in vitro Study

Anand

Prabhakar

et al. 2016

The Journal of Contemporary Dental Practice

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Aim:The aim of the study is to evaluate the immediate and delayed effects of diode laser on debonding of ceramic brackets. Materials and methods:A total of 60 human extracted premolar teeth were randomly assigned to three different treatment groups. All teeth were bonded with adhesive precoated (APC) ceramic brackets (3M Unitek). A total of 20 teeth were debonded without lasing (group 1), 20 immediately after lasing (group 2), and 20 1 hour after lasing (group 3). For the lasing groups (groups 2 and 3), access cavity was prepared on the occlusal surface to a 2 mm diameter. A transbond plus self-etching primer (3M Unitek, Monrovia, CA, USA) and APC PLUS clarity advanced brackets (3M, Unitek, Monrovia, CA, USA) were used. The shear bond strength (SBS) and adhesive remnant index (ARI) were measured. The internal pulpal wall temperature was noted for the laser groups. Results:The mean SBS was 15.4, 11.57, and 11.79 MPa for groups 1 to 3 respectively. Post hoc test showed significant difference (p < 0.001) between the control group and the lased groups. For groups 2 and 3, the rise in temperature was at an average of 1.4 and 1.3°C respectively. Conclusion:The SBS of APC brackets decreased by 33.3% on application of diode laser without increasing the internal pulp chamber wall temperature significantly. Shear bond strength remains more or less the same whether debonding is done immediately after lasing or 1 hour after lasing. Diode lasers increased the ARI scores and thus decreased the risk of enamel fracture.

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“…Bennett et al in 1984, 4 compared three techniques of bond removal and they concluded that the techniques of applying force to the outer wings of bracket at the resin bracket interface was the best as compared to the technique which removed bracket at enamel resin interface. Odegaard and Segner 1988 6 said that orthodontists want to remove the appliance at the end of treatment without exerting excessive forces. An extensive study was done by Oliver and Pal 7 to evaluate the changes in slot size and interwing distance due to conventional debonding techniques.…”

Section: Discussionmentioning

confidence: 99%