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Class II correction in patients treated with class II elastics and with fixed functional appliances: a comparative study.
Am J Orthod Dentofacial Orthop. 2000 Aug; 118(2):142-9.AJ

Abstract

The aim of the present study was to evaluate quantitatively the skeletal and dental changes contributing to Class II corrections in subjects treated with Class II elastics (Begg technique) compared with subjects treated with fixed functional appliances (Herbst appliance). Thirty-six male patients with Class II, Division 1 malocclusions whose treatment had not included extraction were investigated. Eighteen were treated with the Begg technique, and eighteen were treated with Herbst appliance for an average period of 1.3 and 0.5 years, respectively. Lateral radiographs in habitual occlusion were taken at the start of treatment and 12 months afterwards. In the Begg group, the maxilla moved forward 1 mm more than in the Herbst group, and the mandible moved 1 mm more in the Herbst group than in the Begg group. The skeletal improvement in the Herbst group exceeded the changes in the Begg group by, on average, 2.0 mm (P <.01). The overjet reduction in the Begg group was larger (2.1 mm; P <.01) than in the Herbst group, mostly because of dental movements. The skeletal part of the overjet reduction was 4% in the Begg group compared with 51% in the Herbst group. The molar correction was similar in both groups, but in the Begg group, the skeletal improvement was 10%, compared with 66% in the Herbst group. The overbite correction and the increase in the anterior lower facial height and in the NSL/ML angle were larger in the Begg group (P <.05). The conclusions of this study were that the changes contributing to the Class II corrections in Begg and Herbst therapy were skeletal and dental. The skeletal changes were, however, larger in the Herbst-treated group. On the other hand, favorable and unfavorable vertical changes were more pronounced in the group treated with Class II elastics.

Authors+Show Affiliations

Orthodontic Clinic, Public Dental Health Service, Malmö, Sweden. Birgitta.Nelson@skane.seNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

10935954

Citation

Nelson, B, et al. "Class II Correction in Patients Treated With Class II Elastics and With Fixed Functional Appliances: a Comparative Study." 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. 118, no. 2, 2000, pp. 142-9.
Nelson B, Hansen K, Hägg U. Class II correction in patients treated with class II elastics and with fixed functional appliances: a comparative study. Am J Orthod Dentofacial Orthop. 2000;118(2):142-9.
Nelson, B., Hansen, K., & Hägg, U. (2000). Class II correction in patients treated with class II elastics and with fixed functional appliances: a comparative study. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 118(2), 142-9.
Nelson B, Hansen K, Hägg U. Class II Correction in Patients Treated With Class II Elastics and With Fixed Functional Appliances: a Comparative Study. Am J Orthod Dentofacial Orthop. 2000;118(2):142-9. PubMed PMID: 10935954.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Class II correction in patients treated with class II elastics and with fixed functional appliances: a comparative study. AU - Nelson,B, AU - Hansen,K, AU - Hägg,U, PY - 2000/8/10/pubmed PY - 2000/9/2/medline PY - 2000/8/10/entrez SP - 142 EP - 9 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 - 118 IS - 2 N2 - The aim of the present study was to evaluate quantitatively the skeletal and dental changes contributing to Class II corrections in subjects treated with Class II elastics (Begg technique) compared with subjects treated with fixed functional appliances (Herbst appliance). Thirty-six male patients with Class II, Division 1 malocclusions whose treatment had not included extraction were investigated. Eighteen were treated with the Begg technique, and eighteen were treated with Herbst appliance for an average period of 1.3 and 0.5 years, respectively. Lateral radiographs in habitual occlusion were taken at the start of treatment and 12 months afterwards. In the Begg group, the maxilla moved forward 1 mm more than in the Herbst group, and the mandible moved 1 mm more in the Herbst group than in the Begg group. The skeletal improvement in the Herbst group exceeded the changes in the Begg group by, on average, 2.0 mm (P <.01). The overjet reduction in the Begg group was larger (2.1 mm; P <.01) than in the Herbst group, mostly because of dental movements. The skeletal part of the overjet reduction was 4% in the Begg group compared with 51% in the Herbst group. The molar correction was similar in both groups, but in the Begg group, the skeletal improvement was 10%, compared with 66% in the Herbst group. The overbite correction and the increase in the anterior lower facial height and in the NSL/ML angle were larger in the Begg group (P <.05). The conclusions of this study were that the changes contributing to the Class II corrections in Begg and Herbst therapy were skeletal and dental. The skeletal changes were, however, larger in the Herbst-treated group. On the other hand, favorable and unfavorable vertical changes were more pronounced in the group treated with Class II elastics. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/10935954/Class_II_correction_in_patients_treated_with_class_II_elastics_and_with_fixed_functional_appliances:_a_comparative_study_ DB - PRIME DP - Unbound Medicine ER -