Effects of conventional and modified facemask therapies on dentofacial structures / 대한치과교정학회지
Korean Journal of Orthodontics
;
: 432-443, 2010.
Article
in English
| WPRIM
| ID: wpr-645270
ABSTRACT
OBJECTIVE:
The purpose of this prospective study was to evaluate the dentofacial effects of conventional and modified facemask therapies with rapid maxillary expansion, in a group of Class III patients; and compared with an untreated control group.METHODS:
The conventional facemask group (Group 1) comprised of 24 patients, 13 girls and 11 boys (mean age, 9.2 +/- 1.4 years); the modified facemask treatment group (Group 2) comprised of 24 patients, 12 girls and 12 boys (mean age, 9.3 +/- 1.6 years); and the control group (Group 3) comprised of 21 subjects, 11 girls and 10 boys (mean age, 9.8 +/- 1.9 years). Treatment and control changes within the groups and the differences between the groups were analyzed statistically. Intra-group comparisons were evaluated using the non-parametric Wilcoxon's test and intergroup changes were analyzed using the Kruskal-Wallis test. The statistical significance of intergroup differences was further assessed with the Mann-Whitney test for independent samples and applying Bonferroni's correction (p < 0.016).RESULTS:
In group 1, SNB changes were less than the control. There were increases in SNA, ANB, SN-MP, A to N perp and Upper lip to E plane. In group 2, SNB, U1-NA (mm) U1-NA (degrees) and Pog to N perp (mm) changes were less than the control. There were increases in SNA, ANB, SN-MP, A to N perp and Upper lip to E plane.CONCLUSIONS:
Modified facemask appliance can be used effectively in Class III patients with a retrognathic maxilla. Facemask therapies with expansion resulted in an anterior advancement and translation of maxilla without rotation; and the mandible moved downward and backward in both treatment groups.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Cephalometry
/
Prospective Studies
/
Palatal Expansion Technique
/
Extraoral Traction Appliances
/
Lip
/
Malocclusion
/
Malocclusion, Angle Class III
/
Mandible
/
Maxilla
Type of study:
Observational study
Limits:
Humans
Language:
English
Journal:
Korean Journal of Orthodontics
Year:
2010
Type:
Article
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