Document Detail

Soft tissue, skeletal and dentoalveolar changes following conventional anchorage molar distalization therapy in class II non-growing subjects: a multicentric retrospective study.
MedLine Citation:
PMID:  22583585     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: The purpose of this retrospective prolective study is to evaluate soft tissue, dentoalveolar and skeletal vertical changes following conventional anchorage molar distalization therapy in adult patients.
MATERIALS AND METHODS: Forty-six patients (34 females, mean age 25 years 6 months; and 12 males, mean age 28 years 4 months) were recruited from 4 specialists Board Certified. All subjects underwent molar distalization therapy according different distalization mechanics. Cephalometric headfilms were available for all subjects before (T0) and at the end of comprehensive treatment (T1). The initial and final measurements and treatment changes were compared by means of a paired t-test or a paired Wilcoxon test.
RESULTS: Mean total treatment time was 3 years 3 months ± 8 months. Maxillary first and second molars distalized 2.16±0.84 mm and 2.01±0.69 mm respectively, but also maintained a slight distal tipping of 1.45° (min 2.22°, max -6.45°) and 3.35° (min 0.47°, max -15.48°) at the end of treatment. Distal movement of maxillary first molar contributed 57.6% to molar correction, and 42.4% was due to a mesial movement of mandibular first molar (1.59±0.46 mm). Dentoalveolar changes contributed to overjet correction; maxillary incisors retroclined 5.78°±3.17°, lower incisors proclined 7.49°±4.52° and occlusal plane rotated down and backward 2.32°±2.10°. A significant clockwise rotation of the mandible (1.97°±1.32°) and a significant increase in lower facial height (3.35±1.48) mm were observed. Upper lip slightly retruded (-1.76±1.70 mm) and lower lip protruded (0.96±0.99 mm) but these changes had a negligible impact on clinical appearance.
CONCLUSIONS: Although maxillary molar distalization therapy can be performed in adult patients, significant proclination of the lower incisors, clockwise rotation of the occlusal plane and increase in vertical facial dimension should be expected. Nevertheless, in absence of maxillary third molars and in presence of mandibular third molars this procedure could be recommended.
Mattia Fontana; Mauro Cozzani; Alberto Caprioglio
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Publication Detail:
Type:  Clinical Trial; Journal Article; Multicenter Study     Date:  2011-09-14
Journal Detail:
Title:  Progress in orthodontics     Volume:  13     ISSN:  2196-1042     ISO Abbreviation:  Prog Orthod     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-05-15     Completed Date:  2012-10-24     Revised Date:  2013-06-18    
Medline Journal Info:
Nlm Unique ID:  100936353     Medline TA:  Prog Orthod     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  30-41     Citation Subset:  D; IM    
Copyright Information:
Copyright © 2011 Società Italiana di Ortodonzia SIDO. Published by Elsevier Srl. All rights reserved.
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MeSH Terms
Cephalometry / methods
Chin / pathology
Dental Arch / pathology*
Facial Bones / pathology*
Follow-Up Studies
Incisor / pathology
Lip / pathology
Malocclusion, Angle Class II / therapy*
Mandible / pathology
Maxilla / pathology
Molar / pathology*
Nasal Bone / pathology
Orthodontic Anchorage Procedures / instrumentation,  methods*
Overbite / therapy
Retrospective Studies
Sella Turcica / pathology
Tooth Movement / instrumentation,  methods*
Vertical Dimension
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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