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Shear bond strength and ARI scores of metal brackets to glazed glass ceramics and zirconia: an in vitro study investigating surface treatment protocols.
BMC Oral Health
December 2024
Faculty of Dentistry, Innovative Dental Materials and Interfaces Research Unit (URB2i), UR 4462, Paris Cité University, 1 rue Maurice Arnoux, Montrouge, 92120, France.
Objective: To evaluate the shear bond strength (SBS) and adhesive remnant index (ARI) scores of metal brackets to glazed lithium disilicate reinforced glass-ceramics and zirconia according to various surface treatment protocols.
Methods: A total of 240 lithium disilicate ceramic (LD) and 240 zirconia (Zr) blocks were randomly divided according to sandblasting, hydrofluoric acid (HF) etching, universal primer use, and the adhesive system applied. A maxillary canine metal bracket was bonded to each sample with resin cement (Transbond XT, TXT).
Objectives: To compare the biomechanics of labial and lingual fixed orthodontic treatment options for a simulated curve of Spee malocclusion.
Materials And Methods: An in vitro electromechanical orthodontic simulator was used to measure the three-dimensional forces and moments on each tooth of a mandibular arch. Labial and lingual brackets, both with 0.
Effects of the passive self-ligating system on alveolar bone thickness, dental inclinations, and arch dimensions.
J Clin Exp Dent
November 2024
D.D.S., M.Sc., Ph.D. Professor. Department of Orthodontics. Bauru Dental School, University of São Paulo, Brazil.
Background: We aimed to evaluate changes in buccal bone thickness (BBT), buccolingual dental inclinations (BLI), and transversal widths (TW) after treatment using a passive self-ligating system.
Material And Methods: Pre- and posttreatment cone-beam computed tomography images (CBCT) of 21 Class I patients (initial mean age: 14.99 ± 1.
An actin bracket-induced elastoplastic transition determines epithelial folding irreversibility.
Nat Commun
December 2024
Nano Life Science Institute, Kanazawa University, Kanazawa, Japan.
During morphogenesis, epithelial sheets undergo sequential folding to form three-dimensional organ structures. The resulting folds are often irreversible, ensuring that morphogenesis progresses in one direction. However, the mechanism establishing folding irreversibility remains unclear.
View Article and Find Full Text PDFDoes relative bracket base area affect the accuracy of reconstructed buccal surface in the virtual bracket removal technique?
BMC Oral Health
November 2024
State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd Section of Renmin Nan Road, Chengdu, 610041, China.
Article Synopsis
- The study examines how the area of the bracket base removed (RBA) affects the accuracy of digital surface reconstruction during virtual bracket removal (VBR) for orthodontic retainers.
- Researchers tested 196 teeth, comparing surface deviations (RMS values) of reconstructed teeth to original ones, revealing that increased RBA leads to higher RMS values, especially in molars.
- The findings suggest that maintaining the RBA below 80% of the maximal base area ensures adequate accuracy for effective retainer fabrication.
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