Journal article
Transverse molar movements during growth
American journal of orthodontics and dentofacial orthopedics, Vol.124(6), pp.615-624
12/01/2003
DOI: 10.1016/S0889-5406(03)00630-9
PMID: 14666073
Abstract
The purpose of this study was to evaluate changes in molar crown torque and intermolar arch width from the time of permanent first molar eruption to early adulthood. Molar crown torque and intermolar arch width were measured in 36 untreated subjects with Class I occlusion from the Iowa Facial Growth Study at approximate ages 7.5, 10.3, 12.9, 16.5, and 26.4 years. On average, the mandibular first and second molars uprighted buccally by 5.0° and 7.5°, respectively. Mandibular first and second molar intermolar width increased by 2.2 and 0.78 mm, respectively. On average, maxillary first and second molars uprighted lingually by 3.3° and 5.9°, respectively. Maxillary first and second intermolar width increased by 2.8 and 2.0 mm, respectively. Results of statistical analysis by the Wilcoxon signed rank test indicate that (1) maxillary molars erupt with buccal crown torque and upright with age, whereas mandibular molars erupt with lingual crown torque and upright with age (
P < .01), and (2) molar crown torque changes are accompanied by concurrent increases in maxillary and mandibular intermolar width (
P < .01).
Details
- Title: Subtitle
- Transverse molar movements during growth
- Creators
- Steve Marshall - Buffalo Grove, Ill, USADeborah Dawson - University of IowaKarin A Southard - University of IowaAdam N Lee - University of Iowa, Iowa City, Iowa, USAJohn S Casko - University of IowaThomas E Southard - Department of Orthodontics, University of Iowa, Iowa City, Iowa, USA
- Resource Type
- Journal article
- Publication Details
- American journal of orthodontics and dentofacial orthopedics, Vol.124(6), pp.615-624
- Publisher
- Mosby, Inc
- DOI
- 10.1016/S0889-5406(03)00630-9
- PMID
- 14666073
- ISSN
- 0889-5406
- eISSN
- 1097-6752
- Language
- English
- Date published
- 12/01/2003
- Academic Unit
- Orthodontics; Biostatistics; Pediatric Dentistry
- Record Identifier
- 9984544950802771
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