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Initial and late treatment effects of headgear-Herbst appliance with mandibular step-by-step advancement.
Am J Orthod Dentofacial Orthop. 2002 Nov; 122(5):477-85.AJ

Abstract

The aim of this study was to investigate the effects of the headgear-Herbst appliance with mandibular step-by-step advancement followed by retention with the headgear activator. The sample comprised 22 consecutively treated patients (13.2 +/- 1.5 years old) and 31 matched controls (12.6 +/- 1.3 years old). Lateral cephalograms were obtained at the beginning of treatment, after 6 months (at completion of the initial phase), after 12 months of active treatment (at the end of the late phase), and after 18 months (at the end of retention). The results showed that the skeletal effects over 12 months of treatment were restrained maxillary growth, enhanced mandibular growth, and reduced increase in lower facial height. The restraint effect on the maxilla was significant in both the initial and late phases; the enhanced growth of the mandible was significant during the initial phase only; and the height of the lower face was affected during the late phase only. During retention with the headgear activator, the jaw base relationship was maintained, and the effect on the lower facial height was reinforced. A small relapse of the overjet and molar relationship was the result of dental changes only. During 18 months of active treatment and retention, the overjet correction was the result of 70% skeletal changes. The headgear-Herbst appliance is an effective orthopedic device, and the effect on the maxilla seems to increase with the length of treatment, but the pattern was reversed for the mandible.

Authors+Show Affiliations

Orthodontics, Faculty of Dentistry, The University of Hong Kong, SAR China. euohagg@hkusua.hku.hkNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12439475

Citation

Hägg, Urban, et al. "Initial and Late Treatment Effects of headgear-Herbst Appliance With Mandibular Step-by-step Advancement." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 122, no. 5, 2002, pp. 477-85.
Hägg U, Du X, Rabie AB. Initial and late treatment effects of headgear-Herbst appliance with mandibular step-by-step advancement. Am J Orthod Dentofacial Orthop. 2002;122(5):477-85.
Hägg, U., Du, X., & Rabie, A. B. (2002). Initial and late treatment effects of headgear-Herbst appliance with mandibular step-by-step advancement. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 122(5), 477-85.
Hägg U, Du X, Rabie AB. Initial and Late Treatment Effects of headgear-Herbst Appliance With Mandibular Step-by-step Advancement. Am J Orthod Dentofacial Orthop. 2002;122(5):477-85. PubMed PMID: 12439475.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Initial and late treatment effects of headgear-Herbst appliance with mandibular step-by-step advancement. AU - Hägg,Urban, AU - Du,Xi, AU - Rabie,A Bakr M, PY - 2002/11/20/pubmed PY - 2002/12/20/medline PY - 2002/11/20/entrez SP - 477 EP - 85 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 122 IS - 5 N2 - The aim of this study was to investigate the effects of the headgear-Herbst appliance with mandibular step-by-step advancement followed by retention with the headgear activator. The sample comprised 22 consecutively treated patients (13.2 +/- 1.5 years old) and 31 matched controls (12.6 +/- 1.3 years old). Lateral cephalograms were obtained at the beginning of treatment, after 6 months (at completion of the initial phase), after 12 months of active treatment (at the end of the late phase), and after 18 months (at the end of retention). The results showed that the skeletal effects over 12 months of treatment were restrained maxillary growth, enhanced mandibular growth, and reduced increase in lower facial height. The restraint effect on the maxilla was significant in both the initial and late phases; the enhanced growth of the mandible was significant during the initial phase only; and the height of the lower face was affected during the late phase only. During retention with the headgear activator, the jaw base relationship was maintained, and the effect on the lower facial height was reinforced. A small relapse of the overjet and molar relationship was the result of dental changes only. During 18 months of active treatment and retention, the overjet correction was the result of 70% skeletal changes. The headgear-Herbst appliance is an effective orthopedic device, and the effect on the maxilla seems to increase with the length of treatment, but the pattern was reversed for the mandible. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/12439475/Initial_and_late_treatment_effects_of_headgear_Herbst_appliance_with_mandibular_step_by_step_advancement_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540602002342 DB - PRIME DP - Unbound Medicine ER -