Occlusal Plane Changes After Molar Distalization With a Pendulum Appliance in Growing Patients with Class II Malocclusion: A Retrospective Cephalometric Study.
Cephalometry
Class II Angle malocclusion
molar distalization
occlusal plane
pendulum appliance
Journal
Turkish journal of orthodontics
ISSN: 2148-9505
Titre abrégé: Turk J Orthod
Pays: Turkey
ID NLM: 101726582
Informations de publication
Date de publication:
2021
2021
Historique:
received:
28
04
2020
accepted:
12
10
2020
entrez:
8
4
2021
pubmed:
9
4
2021
medline:
9
4
2021
Statut:
epublish
Résumé
This study aimed to evaluate the skeletal and dental changes after distalization with a pendulum appliance in growing patients with Class II malocclusion, focusing on the occlusal plane (OP). The sample included 24 patients with Class II malocclusion (10 boys, 14 girls); their mean age was 12.1 years. All patients underwent molar distalization and had 2 serial cephalograms traced at baseline (T1) and after distalization (T2). Angular and linear dental changes were calculated by taking the sella-nasion (SN), palatal plane (PP), and pterygoid vertical as reference. OP inclination was compared with SN, PP, and mandibular plane. The collected data were computed for all the tested variables, and one-way paired t-test was used to assess the significance of the differences between the time points. α was set at 0.05. Multiple linear regressions were used to predict the OP changes. The mean total treatment time was 8±2 months to obtain a super Class I molar relationship. In T1-T2 interval, statistically significant incisor buccal tipping of 5°±3.6° (p<0.05), first molar distal tipping of 8.9°±8.3° (p<0.001), and second molar tipping of 8.2°±8.1° (p<0.001) were observed. The maxillary first and second molars moved significantly backward by 2.8±3.2 mm (p<0.05) and 3.7±2.7 mm (p<0.001), respectively. Only the premolars showed a statistically significant anchorage loss of 2.7±3.3 mm (p<0.05); overjet increased significantly at 1.3±1.2 mm (p<0.05). Regarding the OP, none of the tested variables showed any statistically significant changes between T1-T2. The pendulum appliance showed efficacy in distalizing the maxillary first and second molars at the expense of anterior anchorage loss. The OP did not show statistically significant changes after molar distalization.
Identifiants
pubmed: 33828873
doi: 10.5152/TurkJOrthod.2021.20050
pii: tjo-34-1-10
pmc: PMC7990272
doi:
Types de publication
Journal Article
Langues
eng
Pagination
10-17Informations de copyright
© Copyright 2021 by Turkish Orthodontic Society.
Déclaration de conflit d'intérêts
Conflict of Interest: The authors have no conflict of interest to declare.
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