Novel universal system for 3-dimensional orthodontic force-moment measurements and its clinical use

Mencattelli, Margherita; Donati, Elisa; Cultrone, Massimo; Stefanini, Cesare

doi:10.1016/j.ajodo.2015.01.028

Cited by 27 publications

(21 citation statements)

References 23 publications

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“…Based on the aforementioned points these studies were classified as unclear risk of bias. In two studies, blinding of the assessors was not feasible due to the nature of the interventions thus, these studies were rated as high risk of bias.…”

Section: Resultsmentioning

confidence: 99%

“…Finally, three studies reported the importance of aligner modifications in order to achieve the desired rotation. The use of divots corresponding to the tooth to be treated was found to increase rotational forces by 58%, whereas the placement of attachments in teeth with short crowns and few undercuts facilitated as well the delivery of the necessary force system …”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the required force couple to achieve bodily movement and torque cannot be established with the use of plain aligners. Thus, modifications such as attachments, divots and cuts are proposed in order to facilitate the desired tooth movement . Aligners vacuum formed with Biolon delivered the highest moments and forces when compared to Erkodur, although the results were statistically significant only in specific settings.…”

Section: Discussionmentioning

confidence: 99%

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Forces and moments generated by aligner‐type appliances for orthodontic tooth movement: A systematic review and meta‐analysis

Iliadi

Koletsi

Eliades

2019

Orthod Craniofacial Res

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The aim of this review was to systematically appraise the evidence on aligner mechanics and forces and moments generated across difference types of aligners. In vitro‐ laboratory studies for model simulated tooth movement with aligners. Database searches within Medline via Pubmed, Cochrane Central Register of Controlled Trials (CENTRAL), LILACS via BIREME Virtual Health Library. Unpublished literature was also searched in Open Grey, ClinicalTrials.gov (http://www.clinicaltrials.gov), the National Research Register (http://www.controlled-trials.com) and Center for Open Science (Open Science Framework), using the terms “aligner” AND “orthodontic”. Risk of bias assessment was based on the Cochrane Risk of Bias tool. Random effects meta‐analyses were conducted. A total of 447 studies were identified through electronic search and after careful consideration of pre‐ defined eligibility criteria, 13 deemed eligible for inclusion, while 2 were included in the quantitative synthesis. When palatal tipping of the upper central incisor through PET‐G aligners was considered, aligner thickness of 0.5, 0.625 or 0.75 mm was not associated with a significantly different moment to force (M/F) ratio, given a common gingival edge width of 3‐4 mm. Aligner thickness does not appear to possess a significant role in forces and moments generated by clear aligners under specific settings, while the most commonly examined tooth movements are tipping and rotation. The findings of this review may be applicable to certain conditions in laboratory settings.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Forces and moments generated by aligner‐type appliances for orthodontic tooth movement: A systematic review and meta‐analysis

Iliadi

Koletsi

Eliades

2019

Orthod Craniofacial Res

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show abstract

“…Moreover, aligner‐based treatments could require the use of auxiliary elements, such as attachments and geometrical singularities (divots), to assure specific orthodontic movements. In this context, the knowledge of how transparent aligners deliver forces and moments to tooth surfaces would allow the design of optimized appliances leading to more efficient orthodontic treatments …”

Section: Introductionmentioning

confidence: 99%

“…In this context, the knowledge of how transparent aligners deliver forces and moments to tooth surfaces would allow the design of optimized appliances leading to more efficient orthodontic treatments. 9 Some attempts to evaluate loads delivered by aligners to dentitions have been made by experimental tests. An in vivo study was conducted in 10 to measure buccal tipping movements of the upper first premolar through a pressuresensitive film approach.…”

Section: Introductionmentioning

confidence: 99%

Computational design and engineering of polymeric orthodontic aligners

Barone

Paoli

Razionale

et al. 2016

Numer Methods Biomed Eng

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Transparent and removable aligners represent an effective solution to correct various orthodontic malocclusions through minimally invasive procedures. An aligner-based treatment requires patients to sequentially wear dentition-mating shells obtained by thermoforming polymeric disks on reference dental models. An aligner is shaped introducing a geometrical mismatch with respect to the actual tooth positions to induce a loading system, which moves the target teeth toward the correct positions. The common practice is based on selecting the aligner features (material, thickness, and auxiliary elements) by only considering clinician's subjective assessments. In this article, a computational design and engineering methodology has been developed to reconstruct anatomical tissues, to model parametric aligner shapes, to simulate orthodontic movements, and to enhance the aligner design. The proposed approach integrates computer-aided technologies, from tomographic imaging to optical scanning, from parametric modeling to finite element analyses, within a 3-dimensional digital framework. The anatomical modeling provides anatomies, including teeth (roots and crowns), jaw bones, and periodontal ligaments, which are the references for the down streaming parametric aligner shaping. The biomechanical interactions between anatomical models and aligner geometries are virtually reproduced using a finite element analysis software. The methodology allows numerical simulations of patient-specific conditions and the comparative analyses of different aligner configurations. In this article, the digital framework has been used to study the influence of various auxiliary elements on the loading system delivered to a maxillary and a mandibular central incisor during an orthodontic tipping movement. Numerical simulations have shown a high dependency of the orthodontic tooth movement on the auxiliary element configuration, which should then be accurately selected to maximize the aligner's effectiveness.

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The optimal activation of plastic aligner for canine distal movement: a three-dimensional finite element analysis

She

Luo

et al. 2021

Odontology

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Novel universal system for 3-dimensional orthodontic force-moment measurements and its clinical use

Cited by 27 publications

References 23 publications

Forces and moments generated by aligner‐type appliances for orthodontic tooth movement: A systematic review and meta‐analysis

Forces and moments generated by aligner‐type appliances for orthodontic tooth movement: A systematic review and meta‐analysis

Computational design and engineering of polymeric orthodontic aligners

The optimal activation of plastic aligner for canine distal movement: a three-dimensional finite element analysis

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