Stability of anterior open-bite extraction and nonextraction treatment in the permanent dentition

Autor(es)

Janson, Guilherme ; Valarelli, Fabribio Pinelli ; Soares Beltrao, Rejane Targino ; Roberto de Freitas, Marcos ; Castanha Henriques, Jos Fernando

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS; v. 129, n. 6, p. 768-774, JUN 2006.
• Citações Web of Science: 33

Resumo

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. (AU)

• Processo FAPESP: 00/00603-7 - Estudo da estabilidade do tratamento sem extracao dos casos de mordida aberta anterior na fase de dentadura permanente, apos 5 anos do termino do tratamento.
• Beneficiário: Fabricio Pinelli Valarelli
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 00/01199-5 - Estudo da recidiva apos cinco anos de tratamento, dos casos de mordida aberta tratados pela tecnica edgewise simplificada, com extracoes, na fase de denticao permanente.
• Beneficiário: Rejane Targino Soares Beltrao
• Modalidade de apoio: Bolsas no Brasil - Mestrado