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Eruption Guidance Appliance effects in the treatment of Class II, Division 1 malocclusions.
Am J Orthod Dentofacial Orthop. 2000 Feb; 117(2):119-29.AJ

Abstract

The objective of this research was to cephalometrically evaluate the possible effects of the Eruption Guidance Appliance on the craniofacial complex in a sample of 30 patients, over a treatment period of 26 months. The experimental sample consisted of 30 patients (13 females and 17 males), 27 of which presented with a Class II, Division 1 malocclusion and 3 with a Class I malocclusion. The mean initial chronologic age was 9 years; the treatment period lasted 26 months. A control group was used for comparison and consisted of 30 subjects (13 females and 17 males) of similar ages and spanned a similar observation period. Twenty-six subjects of this control group had Class II, Division 1 malocclusions, and 4 had Class I malocclusions. Lateral cephalometric headplates were obtained for the experimental group initially and after 26 months of treatment. The subjects in the control group were randomly selected from a serial growth study sample from the Orthodontic Department at Bauru Dental School, University of São Paulo, for whom cephalometric headplates were obtained annually from 4 to 18 years of age. Comparative statistics were used to assess possible differences between the experimental and control groups during the 26-month period of observation. Results demonstrated statistically significant increases in mandibular growth, degree of mandibular protrusion, lower anterior and total anterior face height, mesial migration of the lower molars, and mandibular posterior dentoalveolar height. There was also lingual tipping and retrusion of the upper incisors, linear protrusion of the lower incisors, improvement in the maxillomandibular relationship and in molar relationship, as well as a significant decrease in the overjet and overbite and an inhibition of the vertical development of the upper incisors. The study demonstrated no significant changes in maxillary growth during the evaluation period. It was concluded from these results that the effects of the Eruption Guidance Appliance during this time period were mostly dentoalveolar, with a smaller, but significant, skeletal effect.

Authors+Show Affiliations

Department of Orthodontics, Bauru Dental School, University of São Paulo, SP, Brazil. jansong@travelnet.com.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

10672211

Citation

Janson, G R., et al. "Eruption Guidance Appliance Effects in the Treatment of Class II, Division 1 Malocclusions." 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. 117, no. 2, 2000, pp. 119-29.
Janson GR, da Silva CC, Bergersen EO, et al. Eruption Guidance Appliance effects in the treatment of Class II, Division 1 malocclusions. Am J Orthod Dentofacial Orthop. 2000;117(2):119-29.
Janson, G. R., da Silva, C. C., Bergersen, E. O., Henriques, J. F., & Pinzan, A. (2000). Eruption Guidance Appliance effects in the treatment of Class II, Division 1 malocclusions. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 117(2), 119-29.
Janson GR, et al. Eruption Guidance Appliance Effects in the Treatment of Class II, Division 1 Malocclusions. Am J Orthod Dentofacial Orthop. 2000;117(2):119-29. PubMed PMID: 10672211.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Eruption Guidance Appliance effects in the treatment of Class II, Division 1 malocclusions. AU - Janson,G R, AU - da Silva,C C, AU - Bergersen,E O, AU - Henriques,J F, AU - Pinzan,A, PY - 2000/2/15/pubmed PY - 2000/3/11/medline PY - 2000/2/15/entrez SP - 119 EP - 29 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 - 117 IS - 2 N2 - The objective of this research was to cephalometrically evaluate the possible effects of the Eruption Guidance Appliance on the craniofacial complex in a sample of 30 patients, over a treatment period of 26 months. The experimental sample consisted of 30 patients (13 females and 17 males), 27 of which presented with a Class II, Division 1 malocclusion and 3 with a Class I malocclusion. The mean initial chronologic age was 9 years; the treatment period lasted 26 months. A control group was used for comparison and consisted of 30 subjects (13 females and 17 males) of similar ages and spanned a similar observation period. Twenty-six subjects of this control group had Class II, Division 1 malocclusions, and 4 had Class I malocclusions. Lateral cephalometric headplates were obtained for the experimental group initially and after 26 months of treatment. The subjects in the control group were randomly selected from a serial growth study sample from the Orthodontic Department at Bauru Dental School, University of São Paulo, for whom cephalometric headplates were obtained annually from 4 to 18 years of age. Comparative statistics were used to assess possible differences between the experimental and control groups during the 26-month period of observation. Results demonstrated statistically significant increases in mandibular growth, degree of mandibular protrusion, lower anterior and total anterior face height, mesial migration of the lower molars, and mandibular posterior dentoalveolar height. There was also lingual tipping and retrusion of the upper incisors, linear protrusion of the lower incisors, improvement in the maxillomandibular relationship and in molar relationship, as well as a significant decrease in the overjet and overbite and an inhibition of the vertical development of the upper incisors. The study demonstrated no significant changes in maxillary growth during the evaluation period. It was concluded from these results that the effects of the Eruption Guidance Appliance during this time period were mostly dentoalveolar, with a smaller, but significant, skeletal effect. SN - 0889-5406 UR - https://www.unboundmedicine.com/medline/citation/10672211/Eruption_Guidance_Appliance_effects_in_the_treatment_of_Class_II_Division_1_malocclusions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889540600685153 DB - PRIME DP - Unbound Medicine ER -