Maxillary two bicuspid extraction: a viable approach?
Date
1974
DOI
Authors
Lundstedt, George W.
Version
OA Version
Citation
Abstract
The main objective of this study was to ascertain whether extraction of maxillary first bicuspids was a viable treatment entity in treating Class II Division I cases by comparing this approach (Group II) to the standard four first bicuspid extraction procedure (Group I). Twenty treated patients, ten from each category, were compared using as standards the relapse of overbite-overjet, maintenance of closure of extraction space, the occlusion, and various cephalometric data. Immediate post-treatment costs and cephalometric film were compared to the existing oral status less than one year into retention. The occlusal criteria used were the existence at exam of centric prematurities and balancing side contacts.
Results showed that there was a relapse of overbite and overjet within the first year post-treatment in both groups, but that it was significantly lower in Group II. The treatment time also was significantly less for Group II, with a mean of 18.2 months, than for group I, 27.0 months. Extraction spaces opened in both groups and there was a high incidence of occlusal irregularities. Worthy of note is the high level of balancing contacts in the second molar area in each group. No significant findings evolved from the cephalometric data.
These results suggest that the maxillary bicuspid approach is a practical alternative to four first bicuspid extractions in selected Class II Division I cases. They also suggest the need to adjust the molar area post-treatment for best occlusal results.
Description
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Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1974. Orthodontics.
Bibliography included.
Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1974. Orthodontics.
Bibliography included.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.