Journal article

Publication year: 2013

Pages: 187-204

Journal: Journal of Orofacial Orthopedics

Volume number: 74

Issue number: 3

ISSN: 1434-5293

eISSN: 1615-6714

DOI Link: https://doi.org/10.1007/s00056-013-0139-y

Publisher: Springer

Abstract: 

To analyze the influence of skeletal maturity on Herbst multibracket (MB) treatment of Class II division 2 malocclusions and its stability.

A total of 37 patients fulfilled the inclusion criteria (Class II division 2, fully erupted premolars and canines, Class II molar relationship a parts per thousand yen1/2 cusp widths bilaterally or 1 cusp width unilaterally, retention period a parts per thousand yen24 months). According to pretreatment hand wrist skeletal maturity the subjects were assigned to the groups EARLY (n=9), LATE (n=14) and ADULT (n=14). Lateral headfilms (T1: before treatment, T2: after Herbst MB treatment, T3: after retention) were analyzed using the Sagittal-Occlusal analysis and standard cephalometrics.

During Herbst MB treatment (T2-T1), significant (p < 0.001) molar relationship improvement was seen in all groups (EARLY: 3.6 mm; LATE: 3.7 mm; ADULT: 3.2 mm). The amount of skeletal effects contributing to molar correction varied markedly between the groups (EARLY: 19%; LATE: 62%; ADULT: 31%). Improvement (p < 0.01) was also seen for ssNB angle (EARLY: 1.8A degrees; LATE: 1.8A degrees; ADULT: 0.9A degrees) and overbite (EARLY: 3.3 mm; LATE: 4.5 mm; ADULT: 4.3 mm). During retention (T3-T2), minimal changes of molar relationship (< 0.2 mm) and ssNB angle (< 0.5A degrees) were seen in all groups. Also the overbite relapsed (EARLY: 0.5 mm; LATE: 1.0 mm; ADULT: 1.1 mm) only to a clinically irrelevant extent.

Irrespective of skeletal maturity, Herbst MB treatment of Class II division 2 malocclusions showed to be successful and stable. However, the LATE group showed the highest amount of skeletal effects contributing to the correction of the molar relationship.

Harvard Citation style: Bock, N. and Ruf, S. (2013) Class II division 2 treatment-does skeletal maturity influence success and stability?, Journal of Orofacial Orthopedics, 74(3), pp. 187-204. https://doi.org/10.1007/s00056-013-0139-y

APA Citation style: Bock, N., & Ruf, S. (2013). Class II division 2 treatment-does skeletal maturity influence success and stability?. Journal of Orofacial Orthopedics. 74(3), 187-204. https://doi.org/10.1007/s00056-013-0139-y