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Treatment effects of headgear biteplane and bionator appliances.
Am J Orthod Dentofacial Orthop. 2007 Aug; 132(2):191-8.AJ

Abstract

INTRODUCTION

The purpose of this investigation was to evaluate the dentoalveolar and skeletal cephalometric changes produced by headgear (HG) biteplane and bionator appliances in subjects with Class II Division 1 malocclusion.

METHODS

The sample comprised 60 patients with Class II Division 1 malocclusion; 30 (15 boys, 15 girls; mean age, 10.02 years) were treated with the HG biteplane for a mean period of 1.78 years, and 30 (15 boys, 15 girls; mean age, 10.35 years) were treated with a bionator for a mean period of 1.52 years. For comparison, a control group of 30 untreated Class II children (15 boys, 15 girls) with an initial mean age of 10.02 years, followed for 1.48 years, was established. Lateral cephalometric headfilms were obtained at the beginning and at the end of the treatment or observation period.

RESULTS

The results showed that forward growth of the maxilla was restricted in the HG biteplane group. Bionator treatment, however, produced a statistically significant increase in mandibular protrusion. Both appliances provided increases in total mandibular and ramus lengths. There were no statistically significant differences in craniofacial growth direction. The mandibular incisors were tipped labially with bionator treatment and lingually in the HG biteplane group. The maxillary incisors were retruded with both appliances; there also were a significant increase in mandibular posterior dentoalveolar height and a restriction in the vertical development of the maxillary molars.

CONCLUSIONS

Class II treatment with HG biteplane and bionator appliances is efficient over the short term, with pronounced dentoalveolar movements and smaller but still significant skeletal effects. The stability of these results should be examined in a long-term study.

Authors+Show Affiliations

Lins Dental School, Methodist University of Piracicaba, SP, Brazil. renatinhaalmeida@uol.com.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17693369

Citation

Almeida-Pedrin, Renata Rodrigues, et al. "Treatment Effects of Headgear Biteplane and Bionator Appliances." 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. 132, no. 2, 2007, pp. 191-8.
Almeida-Pedrin RR, Almeida MR, Almeida RR, et al. Treatment effects of headgear biteplane and bionator appliances. Am J Orthod Dentofacial Orthop. 2007;132(2):191-8.
Almeida-Pedrin, R. R., Almeida, M. R., Almeida, R. R., Pinzan, A., & Ferreira, F. P. (2007). Treatment effects of headgear biteplane and bionator appliances. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 132(2), 191-8.
Almeida-Pedrin RR, et al. Treatment Effects of Headgear Biteplane and Bionator Appliances. Am J Orthod Dentofacial Orthop. 2007;132(2):191-8. PubMed PMID: 17693369.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Treatment effects of headgear biteplane and bionator appliances. AU - Almeida-Pedrin,Renata Rodrigues, AU - Almeida,Marcio Rodrigues, AU - Almeida,Renato Rodrigues, AU - Pinzan,Arnaldo, AU - Ferreira,Fernando Pedrin Carvalho, PY - 2005/04/16/received PY - 2005/07/18/revised PY - 2005/07/18/accepted PY - 2007/8/19/pubmed PY - 2007/8/25/medline PY - 2007/8/19/entrez SP - 191 EP - 8 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 - 132 IS - 2 N2 - INTRODUCTION: The purpose of this investigation was to evaluate the dentoalveolar and skeletal cephalometric changes produced by headgear (HG) biteplane and bionator appliances in subjects with Class II Division 1 malocclusion. METHODS: The sample comprised 60 patients with Class II Division 1 malocclusion; 30 (15 boys, 15 girls; mean age, 10.02 years) were treated with the HG biteplane for a mean period of 1.78 years, and 30 (15 boys, 15 girls; mean age, 10.35 years) were treated with a bionator for a mean period of 1.52 years. For comparison, a control group of 30 untreated Class II children (15 boys, 15 girls) with an initial mean age of 10.02 years, followed for 1.48 years, was established. Lateral cephalometric headfilms were obtained at the beginning and at the end of the treatment or observation period. RESULTS: The results showed that forward growth of the maxilla was restricted in the HG biteplane group. Bionator treatment, however, produced a statistically significant increase in mandibular protrusion. Both appliances provided increases in total mandibular and ramus lengths. There were no statistically significant differences in craniofacial growth direction. The mandibular incisors were tipped labially with bionator treatment and lingually in the HG biteplane group. The maxillary incisors were retruded with both appliances; there also were a significant increase in mandibular posterior dentoalveolar height and a restriction in the vertical development of the maxillary molars. CONCLUSIONS: Class II treatment with HG biteplane and bionator appliances is efficient over the short term, with pronounced dentoalveolar movements and smaller but still significant skeletal effects. The stability of these results should be examined in a long-term study. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/17693369/Treatment_effects_of_headgear_biteplane_and_bionator_appliances_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(07)00382-4 DB - PRIME DP - Unbound Medicine ER -