Evaluation of bond strength of molar orthodontic tubes subjected to reinforcement with flowable and bonding resins

Jardim, Alexandre Fausto Veiga; Azevedo, Monarko Nunes de; Souza, João Batista de; Freitas, Jairo Curado de; Estrela, Carlos

doi:10.1007/s00056-020-00235-5

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…At present, many studies assessed the artifacts derived from molar bands [ 10 , 11 , 12 ], but little data are available about their interaction with the magnetic field and whether they should be removed. Molar bands are used in the fixed orthodontic treatment, both with metallic and ceramic brackets [ 13 , 14 ]. Headgears, lingual arches, transpalatal bars or quad-helixes require molar bands to be used [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnetic Resonance Imaging at 1.5 T and 3 T on Temperature and Bond Strength of Orthodontic Bands with Welded Tubes: An In Vitro Study

et al. 2023

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Magnetic resonance imaging (MRI) is a widely used diagnostic technique. Patients wearing orthodontic devices are often requested to remove their appliances before an MRI exam, even when the exam involves anatomical areas far from the head, in order to prevent the heating and detachment of the appliances. The present report aims to evaluate changes in temperature and adhesive forces of molar bands after MRI at two different strength outputs. Sixty stainless steel molar bands were bonded on permanent human upper molars using two different cements: Unitek Multi-Cure Glass Ionomer Band Cement (3M Unitek, Monrovia, CA, USA) and Transbond Plus Light Cure Band Adhesive (3M Unitek). Appliances were subjected to MRI with two different strengths (1.5 Tesla and 3 Tesla). Tubes and band temperature was measured before and after MRI. Subsequently, the shear bond strength (SBS) test was calculated. Data underwent statistical analysis (p < 0.05). After MRI, molar bands exhibited significant heating, even though not clinically relevant, with a temperature increase ranging between 0.48 °C and 1.25 °C (p < 0.05). SBS did not show significant differences (p > 0.05). The present study suggests that, under MRI, the molar bands tested are safe; therefore, their removal could be not recommended for non-head and neck MRI exams. Removal would be necessary just in artifact risk areas.

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