Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

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Prog Orthod. 2014 Sep 25;15(1):53. doi: 10.1186/s40510-014-0053-x. ABSTRACT BACKGROUND: The aim of this study is to calculate and compare the play and torque expression of 0.018 and 0.022 bracket slots when engaged with archwires of different size, cross section and material. METHODS: Eight orthodontic brackets, two of slot height 0.018 and six of slot height…

Preliminary biometric analysis of mesiodistal tooth dimensions in subjects with normal occlusion

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Am J Orthod Dentofacial Orthop. 2016 Jul;150(1):105-15. doi: 10.1016/j.ajodo.2015.12.021. ABSTRACT INTRODUCTION: The aims of this study were to confirm the efficacy of the Bolton index in a group of natural Class I white Italian patients with complete dentition, minimal crowding, and no previous orthodontic treatment, and to evaluate the mesiodistal tooth dimensions with multivariate cluster…

Stress relaxation properties of four orthodontic aligner materials: A 24-hour in vitro study

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Angle Orthod. 2017 Jan;87(1):11-18. doi: 10.2319/113015-813.1. Epub 2016 Jun 17. ABSTRACT OBJECTIVE: To investigate the stress release properties of four thermoplastic materials used to make orthodontic aligners when subjected to 24 consecutive hours of deflection. MATERIALS AND METHODS: Four types of aligner materials (two single and two double layered) were selected. After initial yield strength…

Quantitative cone-beam computed tomography evaluation of premaxilla and symphysis in Class I and Class III malocclusions

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Int Orthod. 2016 Jun;14(2):143-60. doi: 10.1016/j.ortho.2016.03.014. Epub 2016 Apr 16. ABSTRACT AIMS: In order to compare the premaxilla and symphysis in Class I and Class III individuals, we measured the following parameters on CBCT scans: incisor inclination, symphyseal morphology, upper alveolar process morphology, symphyseal and maxillary leeway space, as well as anterior and posterior maxillary…

Caries prevention during orthodontic treatment: In-vivo assessment of high-fluoride varnish to prevent white spot lesions

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Am J Orthod Dentofacial Orthop. 2016 Feb;149(2):238-43. doi: 10.1016/j.ajodo.2015.07.039. ABSTRACT INTRODUCTION: Our objective was to evaluate the efficacy of a fluoridated varnish in preventing white spot lesions in patients with fixed appliances. A laser-induced fluorescence device was used to determine any correlations between the degree of demineralization and the length of the observation period, the…

Load deflection characteristics of square and rectangular archwires

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Int Orthod. 2016 Mar;14(1):1-14. doi: 10.1016/j.ortho.2015.12.011. Epub 2016 Jan 27. ABSTRACT AIMS: To determine and compare the relative stiffness of a large selection of commonly-used square and rectangular steel, super-tempered steel, NiTi, and TMA orthodontic archwires of various cross-sections, in order to provide the clinician with a useful, easy-to-consult guide to archwire sequence selection. MATERIALS…

Optical properties of orthodontic aligners–spectrophotometry analysis of three types before and after aging

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Prog Orthod. 2015;16:41. doi: 10.1186/s40510-015-0111-z. Epub 2015 Nov 18. ABSTRACT BACKGROUND: The aim was to assess and compare absorbance and transmittance values of three types of clear orthodontic aligners before and after two cycles of in vitro aging. METHODS: Nine samples of orthodontic aligners from three different manufacturers (Invisalign, Align Technology, Santa Clara, CA, USA;…