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Stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition.
Am J Orthod Dentofacial Orthop. 2006 Jun; 129(6):768-74.AJ

Abstract

INTRODUCTION

Although stability of anterior open-bite extraction and nonextraction treatment has been investigated, results suggesting that extraction treatment is more stable have not been confronted. Therefore, the purpose of this cephalometric study was to compare the long-term stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition.

METHODS

Group 1 consisted of 21 patients treated without extractions, and group 2 included 31 patients treated with extractions who had orthodontic treatment with fixed appliances. Cephalometric headplates were obtained at pretreatment, posttreatment, and postretention. The groups were compared at these 3 times and during the treatment and posttreatment periods with independent t tests. The number of patients with a clinically significant relapse of the open bite was compared between the groups with chi-square tests.

RESULTS

During treatment, the maxillary incisors had greater retraction amounts, and the mandibular incisors had greater retraction and lingual tipping, and less extrusion in the extraction group. In the posttreatment period, the extraction group demonstrated statistically greater stability of the overbite. However, there was no statistically significant difference in the percentages of patients with clinically significant relapse of the open bite between the groups.

CONCLUSION

Open-bite extraction treatment has greater stability of the overbite than open-bite nonextraction treatment.

Authors+Show Affiliations

Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, 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

16769495

Citation

Janson, Guilherme, et al. "Stability of Anterior Open-bite Extraction and Nonextraction Treatment in the Permanent Dentition." 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. 129, no. 6, 2006, pp. 768-74.
Janson G, Valarelli FP, Beltrão RT, et al. Stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition. Am J Orthod Dentofacial Orthop. 2006;129(6):768-74.
Janson, G., Valarelli, F. P., Beltrão, R. T., de Freitas, M. R., & Henriques, J. F. (2006). Stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 129(6), 768-74.
Janson G, et al. Stability of Anterior Open-bite Extraction and Nonextraction Treatment in the Permanent Dentition. Am J Orthod Dentofacial Orthop. 2006;129(6):768-74. PubMed PMID: 16769495.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition. AU - Janson,Guilherme, AU - Valarelli,Fabrício Pinelli, AU - Beltrão,Rejane Targino Soares, AU - de Freitas,Marcos Roberto, AU - Henriques,José Fernando Castanha, PY - 2004/07/11/received PY - 2004/11/17/revised PY - 2004/11/29/accepted PY - 2006/6/14/pubmed PY - 2006/6/27/medline PY - 2006/6/14/entrez SP - 768 EP - 74 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 - 129 IS - 6 N2 - INTRODUCTION: Although stability of anterior open-bite extraction and nonextraction treatment has been investigated, results suggesting that extraction treatment is more stable have not been confronted. Therefore, the purpose of this cephalometric study was to compare the long-term stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition. METHODS: Group 1 consisted of 21 patients treated without extractions, and group 2 included 31 patients treated with extractions who had orthodontic treatment with fixed appliances. Cephalometric headplates were obtained at pretreatment, posttreatment, and postretention. The groups were compared at these 3 times and during the treatment and posttreatment periods with independent t tests. The number of patients with a clinically significant relapse of the open bite was compared between the groups with chi-square tests. RESULTS: During treatment, the maxillary incisors had greater retraction amounts, and the mandibular incisors had greater retraction and lingual tipping, and less extrusion in the extraction group. In the posttreatment period, the extraction group demonstrated statistically greater stability of the overbite. However, there was no statistically significant difference in the percentages of patients with clinically significant relapse of the open bite between the groups. CONCLUSION: Open-bite extraction treatment has greater stability of the overbite than open-bite nonextraction treatment. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/16769495/Stability_of_anterior_open_bite_extraction_and_nonextraction_treatment_in_the_permanent_dentition_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(06)00295-2 DB - PRIME DP - Unbound Medicine ER -