Effectiveness of palatal anchorage device (PAD) for maxillary anterior retraction with clear aligners using finite element study.
Clear aligners (CA)
Finite element method
Palatal anchorage device (PAD)
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
30 10 2024
30 10 2024
Historique:
received:
22
12
2023
accepted:
21
10
2024
medline:
31
10
2024
pubmed:
31
10
2024
entrez:
31
10
2024
Statut:
epublish
Résumé
The palatal anchorage device (PAD) is commonly used in fixed appliance for anchorage, but the biomechanics of PAD in patients treated with clear aligners(CAs)remains poorly understood, especially in its elastic mode and force magnitude. This study aimed to assess the biomechanical effects of using PAD for retraction during clear aligner treatment (CAT) with the extraction of two maxillary first premolars. Four finite element models were created: (1) Incisors retraction (IR) with active contraction of the clear aligner only; (2) IR with PAD using different forces (50,75,100 g) or not; (3) PAD without IR (forces of 50,75,100 g), and (4) Different elastic directions (D1, D2, D3) from aligner to PAD without IR. IR caused lingual tipping and extrusion of the central incisors, as well as mesial and buccal tipping of the first molar. PAD during IR provided strong anchorage for the first molar, with elastics slightly increasing the lingual tipping and extrusion of the central incisors. Elastics applied to the U-shaped arch led to central incisor intrusion and reduced lingual retraction. The highest stress was observed on the mesial attachment of the canine. PAD effectively reinforced posterior anchorage in CAT, while anterior positioning facilitated anterior teeth intrusion. The biomechanical importance of the canine's mesial attachments in maxillary teeth treatment planning was highlighted.
Identifiants
pubmed: 39478079
doi: 10.1038/s41598-024-77320-x
pii: 10.1038/s41598-024-77320-x
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
26176Subventions
Organisme : Nanjing Key Project of Foundation
ID : ZKX20048
Organisme : Nanjing Clinical Research Center for Oral Diseases
ID : 2019060009
Organisme : Natural Science Foundation of Jiangsu
ID : SBK2021021787
Organisme : Key project of Jiangsu Provincial Health Commission
ID : ZD2022025
Informations de copyright
© 2024. The Author(s).
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