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SLOW MAXILLARY EXPANSION FOR THE TREATMENT OF UNILATERAL
CROSSBITE IN PRE-ADOLESCENTS: A LONG-TERM RETROSPECTIVE STUDY
OF THE CHANGES IN ARCH DIMENSION
by
Christian Alexander Wong
________________________________________________________________
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(CRANIOFACIAL BIOLOGY)
May 2008
Copyright 2008 Christian Alexander Wong
Object Description
| Title | Slow maxillary expansion for the treatment of unilateral crossbite in pre-adolescents: a long-term retrospective study of the changes in arch dimension |
| Author | Wong, Christian Alexander |
| Author email | wongca@usc.edu |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Dentistry |
| School | School of Dentistry |
| Date defended/completed | 2008-03-27 |
| Date submitted | 2008 |
| Restricted until | Restricted until 25 Mar. 2010. |
| Date published | 2010-03-25 |
| Advisor (committee chair) | Keim, Robert G. |
| Advisor (committee member) |
Sinclair, Peter Paine, Michael Moon, Holly Enciso, Reyes |
| Abstract | The purpose of this study was to evaluate the treatment changes and post-treatment stability in dental arch dimensions in unilateral crossbite patients treated by SME while comparing the Haas, Hyrax, and Quad Helix appliances. Serial dental casts of 110 patients were evaluated at 3 time points: pre-expansion (T1), post-expansion (T2), and approximately 4 years later, before fixed appliance therapy (T3). All measurements were compared with published growth norms. Treatment by SME resulted in similarly favorable amounts of expansion by all three expanders in all measurements for both arches. Maxillary intercanine and intermolar width increased by 4.5 mm and 3.5 mm, respectively, from T1 to T3. Maxillary arch circumference also increased by 1 mm. Mandibular width did not change. At 4 years post-expansion, 97% of intercanine expansion and 80% of intermolar expansion was maintained. |
| Keyword | posterior crossbite; unilateral crossbite; quad helix; hyrax; haas; expander; SME; slow maxillary expansion |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m1046 |
| Contributing entity | University of Southern California |
| Rights | Wong, Christian Alexander |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@dots.usc.edu |
| Filename | etd-Wong-20080325 |
| Archival file | uscthesesreloadpub_Volume23/etd-Wong-20080325.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@dots.usc.edu |
| Full text | SLOW MAXILLARY EXPANSION FOR THE TREATMENT OF UNILATERAL CROSSBITE IN PRE-ADOLESCENTS: A LONG-TERM RETROSPECTIVE STUDY OF THE CHANGES IN ARCH DIMENSION by Christian Alexander Wong ________________________________________________________________ A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (CRANIOFACIAL BIOLOGY) May 2008 Copyright 2008 Christian Alexander Wong |
