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Your search keyword '"Matteo Zanarini"' showing total 3 results
Start Over Author "Matteo Zanarini" Topic debonding
3 results on '"Matteo Zanarini"'

1. The use of the laser confocal scanning microscopy to measure resin remnants on customized lingual bracket

Author

Can Kuskonmaz, Alberto De Stefani, Gilberto Artioli, Matteo Zanarini, Giulio Alessandri Bonetti, Giovanni Bruno, and Antonio Gracco

Subjects
Lingual orthodontics, debonding, ARI, confocal microscope, Dentistry, RK1-715
Abstract

Abstract Background The study aimed to evaluate the permanence of resin and enamel remains on lingual brackets at the end of orthodontic treatment and after the debonding procedure. The evaluation of resin remnants on customized lingual brackets bases has never done before in other studies because they are curved, and traditional techniques are not applicable. Methods The sample consisted of 100 lingual brackets (25 incisors, 25 canines, 25 premolars, 25 molars) scanned with a confocal laser microscope (OLS4000). We measured the brackets' surface and the area of resin remnants with the software of the microscope. Median and quartiles were presented to describe the data. ARI calculation was indirect for each tooth, measuring the resin remnants to the total surface of the bracket. The Kruskal-Wallis test and Fisher test were applied respectively to compare the percentages of remnants and the frequencies of the ARI between the four groups. Results After the analyses, 13 brackets had no adhesive remnants (ARI 0), 29 brackets had less than 50% of resin remnants (ARI 1), 50 brackets had more than 50% of resin remnants (ARI 2), and 8 brackets had 100% of adhesive (ARI 3). Canines brackets presented the lower amount of resin followed by premolars, incisors, and molars. Conclusion Lingual brackets showed a high frequency of ARI = 2. The median percentage of the bracket surface covered by resin was 41%. We observed a slight tendency of more resin remnants on molar brackets, due to half-pad configuration. The authors suggest paying attention during the debonding procedure of molar brackets since a stronger connection between the adhesive and the bracket mesh means a higher risk of enamel damage.

Published
2020
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2. Evaluation of enamel surfaces after bracket debonding: An in-vivo study with scanning electron microscopy

Author

Maria Rosaria Gatto, Silvia Marchionni, Monica Lattuca, Serena Incerti Parenti, Matteo Zanarini, Giulio Alessandri Bonetti, Alessandri Bonetti G, Zanarini M, Incerti Parenti S, Lattuca M, Marchionni S, and Gatto MR

Subjects
Male, Materials science, Orthodontic Brackets, Surface Properties, Scanning electron microscope, Dental Cements, Dentistry, Orthodontics, Composite Resins, Young Adult, Acid Etching, Dental, Coated Materials, Biocompatible, stomatognathic system, Paired samples, SCANNING ELECTRON MICROSCOPE, Materials Testing, Adhesive remnant index, Transbond XT, Humans, Orthodontic Appliance Design, Replica Techniques, Bicuspid, Dental Enamel, Tooth Crown, Dental Debonding, Enamel paint, ENAMEL SURFACE DAMAGE, business.industry, Bracket, Significant difference, Dental Bonding, Adhesiveness, Dental Prophylaxis, Resin Cements, stomatognathic diseases, DEBONDING, visual_art, Dental Etching, Microscopy, Electron, Scanning, visual_art.visual_art_medium, EPOXY RESIN REPLICAS, Female, Adhesive, business, Follow-Up Studies
Abstract

Introduction: The purposes of this in-vivo study were to compare the modes of failure of uncoated and adhesive precoated metal brackets by using the adhesive remnant index, and to assess the quality of the enamel surface after cleanup by using the enamel damage index. Methods: Twelve Victory brackets (group A) and 12 Victory adhesive precoated brackets (group B) (both, 3M Unitek, Monrovia, Calif) were bonded onto the maxillary second premolars of 12 volunteers. The uncoated brackets were bonded with Transbond XT adhesive resin (3M Unitek). Replicas of the teeth were made before bonding (T0), after bracket removal (T1), and after cleanup (T2). Scanning electron microscope images of all labial enamel surfaces were taken at T0, T1, and T2, and these were evaluated according to the adhesive remnant index and the enamel damage index. Results: Evaluation of the adhesive remnant index scores with the chi-square test showed no statistically significant difference between the groups. Evaluation of the enamel damage index grades with the sign test for paired samples showed a statistically significant difference (P .01) between T0 and T2. Conclusions: Uncoated and precoated brackets exhibited similar debonding patterns. Additionally, the debonding method tested in this study did not restore the original enamel surface, although there was no clinically relevant enamel damage.

Published
2011
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3. Bracket base remnants after orthodontic debonding

Author

Antonio Gracco, Giulio Alessandri Bonetti, Maria Rosaria Gatto, Silvia Marchionni, Monica Lattuca, Matteo Zanarini, Zanarini M, Gracco A, Lattuca M, Marchionni S, Gatto MR, and Alessandri Bonetti G

Subjects
Male, energy dispersive x-ray spectrometry, Materials science, Adolescent, Scanning electron microscope, Orthodontic Brackets, Population, Dentistry, Dental Cements, Orthodontics, Incisor, medicine, Humans, education, Child, Dental Enamel, bracket base, education.field_of_study, Dental Debonding, Enamel paint, business.industry, Bracket, Spectrometry, X-Ray Emission, Original Articles, medicine.anatomical_structure, visual_art, visual_art.visual_art_medium, Microscopy, Electron, Scanning, Female, debonding, business, scanning electron microscopy
Abstract

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 = 818) were selected and analyzed with ImageJ software to measure the remnant area. From this population a statistically significant sample (n = 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 = .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 = .0001, respectively). Conclusion: The objective of an atraumatic debonding is not achieved yet; in some cases the damage could be clinically relevant.

Published
2013

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