Journal article

Publication year: 2009

Pages: 51-62

Journal: Journal of Orofacial Orthopedics

Volume number: 70

Issue number: 1

ISSN: 1434-5293

eISSN: 1615-6714

DOI Link: https://doi.org/10.1007/s00056-009-8801-0

Publisher: Springer

Abstract: 

To examine the treatment and post-treatment effects of the Herbst-Multibracket (MB) appliance on facial profile and lip position in adult Class II, Division 2 subjects.

Lateral head films of 16 consecutivelytreated adult Class II, Division 2 subjects (8 males, 8 females) with an average age of 18.8 years pre-treatment were analyzed on three occasions: before treatment (T1), after Herbst-MB treatment (T2) and 2 years post-treatment (T3).

Treatment period (T2-T1): an increase occurred in the hard tissue profile angle (2.5A degrees; p < 0.001), the soft tissue profile angle excluding the nose (2.6A degrees; p < 0.01), and the soft tissue profile angle including the nose (1.8A degrees; p < 0.05). The upper lip became more retrusive in relation to the Esthetic line (EL) (0.8 mm; p < 0.05) while the lower lip's position was unchanged. Lower lip coverage of the upper incisors was reduced (0.8 mm; p < 0.05). Post-treatment period (T3-T2): the soft tissue profile angle (excluding the nose) increased (1.6A degrees; p < 0.01), while the hard and soft tissue profile angles including the nose remained unchanged. Both, the upper and lower lips became more retrusive in relation to the EL (0.9 mm; p < 0.01 and 1.0 mm; p < 0.001). The lower lip coverage of the upper incisors remained unchanged.

The hard and soft tissue profiles were straightened during Herbst-MB treatment, including a brief follow-up period. The lips became more retrusive while the lower lip coverage of the upper incisors was reduced.

Harvard Citation style: Bock, N., Santo, C. and Pancherz, H. (2009) Facial Profile and Lip Position Changes in Adult Class II, Division 2 Subjects Treated with the Herbst-Multibracket Appliance. A Radiographic Cephalometric Pilot Study, Journal of Orofacial Orthopedics, 70(1), pp. 51-62. https://doi.org/10.1007/s00056-009-8801-0

APA Citation style: Bock, N., Santo, C., & Pancherz, H. (2009). Facial Profile and Lip Position Changes in Adult Class II, Division 2 Subjects Treated with the Herbst-Multibracket Appliance. A Radiographic Cephalometric Pilot Study. Journal of Orofacial Orthopedics. 70(1), 51-62. https://doi.org/10.1007/s00056-009-8801-0