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Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study

OBJECTIVE: To assess the effects of thermoforming on aligner thickness and gap width in six aligner systems with the same nominal thickness. METHODS: Six passive upper aligners of different brands were adapted to a single printed cast. Each sample was evaluated with high-resolution micro-computed to...

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Autores principales: Palone, Mario, Longo, Mattia, Arveda, Niki, Nacucchi, Michele, Pascalis, Fabio De, Spedicato, Giorgio Alfredo, Siciliani, Giuseppe, Lombardo, Luca
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Association of Orthodontists 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7940810/
https://www.ncbi.nlm.nih.gov/pubmed/33678629
http://dx.doi.org/10.4041/kjod.2021.51.2.135
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author Palone, Mario
Longo, Mattia
Arveda, Niki
Nacucchi, Michele
Pascalis, Fabio De
Spedicato, Giorgio Alfredo
Siciliani, Giuseppe
Lombardo, Luca
author_facet Palone, Mario
Longo, Mattia
Arveda, Niki
Nacucchi, Michele
Pascalis, Fabio De
Spedicato, Giorgio Alfredo
Siciliani, Giuseppe
Lombardo, Luca
author_sort Palone, Mario
collection PubMed
description OBJECTIVE: To assess the effects of thermoforming on aligner thickness and gap width in six aligner systems with the same nominal thickness. METHODS: Six passive upper aligners of different brands were adapted to a single printed cast. Each sample was evaluated with high-resolution micro-computed tomography. To investigate aligner thickness and gap width, two-dimensional (2D) analysis was conducted assessing the effects of the following variables tooth type (central incisor, canine, and first molar), 2D reference points, and aligner type. Data were analyzed and compared using analysis of variance and Tukey’s post-hoc tests (p < 0.05). RESULTS: Tooth type, dental region, and aligner type affected both the gap width and aligner thickness. The aligner thickness remained moderately stable across the arch only in the F22. CONCLUSIONS: All thermoformed samples displayed smaller aligner thickness and gap width at anterior teeth and both gingival and coronal centers than at posterior teeth and occlusal surfaces.
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spelling pubmed-79408102021-03-25 Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study Palone, Mario Longo, Mattia Arveda, Niki Nacucchi, Michele Pascalis, Fabio De Spedicato, Giorgio Alfredo Siciliani, Giuseppe Lombardo, Luca Korean J Orthod Brief Report OBJECTIVE: To assess the effects of thermoforming on aligner thickness and gap width in six aligner systems with the same nominal thickness. METHODS: Six passive upper aligners of different brands were adapted to a single printed cast. Each sample was evaluated with high-resolution micro-computed tomography. To investigate aligner thickness and gap width, two-dimensional (2D) analysis was conducted assessing the effects of the following variables tooth type (central incisor, canine, and first molar), 2D reference points, and aligner type. Data were analyzed and compared using analysis of variance and Tukey’s post-hoc tests (p < 0.05). RESULTS: Tooth type, dental region, and aligner type affected both the gap width and aligner thickness. The aligner thickness remained moderately stable across the arch only in the F22. CONCLUSIONS: All thermoformed samples displayed smaller aligner thickness and gap width at anterior teeth and both gingival and coronal centers than at posterior teeth and occlusal surfaces. Korean Association of Orthodontists 2021-03-25 2021-03-25 /pmc/articles/PMC7940810/ /pubmed/33678629 http://dx.doi.org/10.4041/kjod.2021.51.2.135 Text en © 2021 The Korean Association of Orthodontists. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Brief Report
Palone, Mario
Longo, Mattia
Arveda, Niki
Nacucchi, Michele
Pascalis, Fabio De
Spedicato, Giorgio Alfredo
Siciliani, Giuseppe
Lombardo, Luca
Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title_full Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title_fullStr Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title_full_unstemmed Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title_short Micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: An in vitro study
title_sort micro-computed tomography evaluation of general trends in aligner thickness and gap width after thermoforming procedures involving six commercial clear aligners: an in vitro study
topic Brief Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7940810/
https://www.ncbi.nlm.nih.gov/pubmed/33678629
http://dx.doi.org/10.4041/kjod.2021.51.2.135
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