Study of mandibular growth in patients treated with Fränkel's functional regulator (1b).

Abstract:

OBJECTIVES:The purpose of this study was to assess mandibular growth in patients with Class II division 1 malocclusions when treated with Fränkel's functional regulator 1b. STUDY DESIGN:The treatment group was made up of 43 patients that were divided into two groups: prepubescent (n:28), and pubescent (n:15). The control group included 40 patients who did not receive any kind of treatment and were likewise divided into a prepubescent group (n:19), and a pubescent group (n:21). A computerized cephalometric study was carried out and superimpositions were done in order to assess the antero-posterior, vertical and rotational movements of the mandible. A two-way ANOVA with interaction was done to compare the changes between the control group and the treatment group, while the Student t for independent samples was used to compare each age group. RESULTS:The Gnathion and Gonion points showed significant differences in the whole sample (p<0.001) as well as in the prepubescent (p<0.001) and pubescent groups (p<0.05). Rotational changes of the mandible measured using the facial axis and mandibular plane showed no statistical differences between both groups (p>0.05). CONCLUSION:The results show that the FR produces vertical orthopedic growth in the mandible but not horizontal growth compared to non-treated Class II-type I malocclusion patients. No rotational changes were found in the mandible, but we did record mandibular growth along the inclination of the facial axis.

authors

Alió-Sanz JJ,Kato E,Lorenzo-Pernía J,Iglesias-Conde C,Iglesias-Linares A,Solano-Reina E

doi

10.4317/medoral.17958

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

e884-92

issue

5

eissn

1698-4447

issn

1698-6946

pii

17958

journal_volume

17

pub_type

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