Journal article

Publication year: 2006

Pages: 930-941

Journal: Angle Orthodontist

Volume number: 76

Issue number: 6

ISSN: 0003-3219

eISSN: 1945-7103

Open access status: Gold

DOI Link: https://doi.org/10.2319/100605-352

Publisher: E.H Angle Education and Research Foundation

Abstract: 

Objective: The aim of this retrospective pilot study was to analyze and compare the short-term and long-term changes of Herbst treatment in Class II division 1 subjects of the retrognathic and prognathic facial type.

Materials and Methods: The subject material comprised 10 retrognathic (mean SNA = 74.5 degrees, SNB = 70.4 degrees, ML/NSL = 41.1 degrees) and 16 prognathic (mean SNA = 86.7 degrees, SNB = 8115), ML/NSL = 25.1 degrees) Class II division 1 subjects treated with the Herbst appliance for an average period of 7 months. Lateral head films from before (T1), immediately after (T2), 12 months after (T3), and 39 months after (T4) Herbst treatment were analyzed with the SO-analysis (analysis of changes in sagittal occlusion) and standard cephalometrics.

Results: During the treatment period (T2-T1) the two facial type groups showed similar favorable changes for all variables. During the posttreatment periods of 12 months (T3-T2) and 39 months (T4-T2) recovering changes occurred. In the long-term, a tendency of more unfavorable growth changes was stronger (not significant) for retrognathic subjects than for prognathic subjects.

Conclusion: On a long-term basis, retrognathic subjects are prone to exhibit more unfavorable mandibular growth changes than prognathic subjects and, thus, might exhibit a greater risk for an occlusal relapse when a stable Class I occlusion is not attained after treatment.

Harvard Citation style: Bock, N. and Pancherz, H. (2006) Herbst treatment of Class II division 1 malocclusions in retrognathic and prognathic facial types - A cephalometric long-term retrospective study, Angle Orthodontist, 76(6), pp. 930-941. https://doi.org/10.2319/100605-352

APA Citation style: Bock, N., & Pancherz, H. (2006). Herbst treatment of Class II division 1 malocclusions in retrognathic and prognathic facial types - A cephalometric long-term retrospective study. Angle Orthodontist. 76(6), 930-941. https://doi.org/10.2319/100605-352