The effect of different thickness of power ridge on torque control during anterior retraction using clear aligners in patients with periodontal disease: a finite element analysis
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Le résumé fourni par la source
BACKGROUND: Periodontal disease is a common disease and leads to the loss of supporting structures and pathologic tooth migration. In order to achieve a functionally sound and aesthetically satisfactory treatment outcome, combined orthodontic-periodontal therapy may be necessary. In this study, we focus on the anterior tooth movement when designing different thickness of power ridge for patients with periodontal disease and investigate its biomechanical effects during anterior retraction using clear aligners (CAs). METHODS: Two models of maxillary with different heights of alveolar bone were constructed, and three models of CAs were created with different power ridge designs. This study includes a total of six finite element models, which included alveolar bone, the first premolars extracted maxillary dentition, periodontal ligaments (PDL), attachments, and CAs. And the biomechanical effects were analyzed and compared in each model during anterior retraction using CAs. RESULTS: Compared to the models with normal height of alveolar bone, the patients with alveolar bone loss had more tooth displacement when the retraction distance was the same. And the center of the rotation of the anterior tooth moved towards the root direction. The total displacement of the central incisor increased in models with power ridges, and 0.5 mm power ridges caused the maximum displacement in both normal alveolar bone and reduced alveolar bone height models. In normal alveolar bone models, the crown and root moved in the same direction in 0.7 mm power ridges, but in reduced alveolar bone models, it was 0.5 mm. The von Mises stress values and maximum principal stress values for PDL increased as the depth of power ridges increased, and 0.7 mm power ridges caused concentration of stress in both models with normal alveolar bone or reduced alveolar bone. CONCLUSIONS: In patients with periodontal disease, the displacement of the entire maxillary dentition increased in comparison to those with normal alveolar bone. And an appropriate thickness of power ridge is beneficial to achieve torque control of anterior teeth. However, excessive thickness of power ridges is not suitable for anterior tooth retraction because of the stress concentration on the PDL.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- The effect of different thickness of power ridge on torque control during anterior retraction using clear aligners in patients with periodontal disease: a finite element analysis
- Date Crossref
- 01/04/2026
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Qingdao University Department of Orthodontics pays non établi dans la noticeUniversité ou école supérieure
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Affiliated Hospital of Qingdao University pays non établi dans la noticeÉtablissement de santé
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Qingdao Municipal Hospital Department of Stomatology pays non établi dans la noticeÉtablissement de santé
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Jimo District Qingdao Hospital of Traditional Chinese Medicine pays non établi dans la noticeÉtablissement de santé
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Qilu Hospital of Shandong University pays non établi dans la noticeÉtablissement de santé
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Qingdao Agricultural University pays non établi dans la noticeUniversité ou école supérieure
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School of Stomatology pays non établi dans la noticeUniversité ou école supérieure
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Qingdao Traditional Chinese Medicine Hospital pays non établi dans la noticeÉtablissement de santé
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Cheeloo College of Medicine Department of Stomatology pays non établi dans la noticeUniversité ou école supérieure
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Ltd Hangzhou Meiqi Technology Co. pays non établi dans la noticeEntreprise
Department of Orthodontics — Qingdao University, Affiliated Hospital of Qingdao University et Department of Stomatology — Qingdao Municipal Hospital, avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.