Avaliação cefalométrica do efeito do tratamento da má oclusão Classe II, divisão 1, com o bionator de Balters: estudo com implantes metálicos

Abstract

OBJETIVOS: julgamento descritivo dos efeitos do bionator no tratamento da má oclusão Classe II, divisão 1, quando está presente uma retrusão mandibular ou uma deficiência do crescimento mandibular. METODOLOGIA: são apresentados os resultados do tratamento em três pacientes que foram acompanhados sem tratamento por um período de um ano e, posteriormente, tratados com o bionator por um período de dois anos. Em todos os pacientes foram inseridos implantes metálicos que serviram como referência para as sobreposições dos traçados cefalométricos que, em conjunto com algumas medidas cefalométricas tradicionais, geraram dados para a avaliação do efeito ortopédico e ortodôntico do tratamento da má oclusão Classe II com este aparelho. RESULTADOS E CONCLUSÕES: foi observada uma restrição do crescimento da maxila e um estímulo do crescimento da mandíbula, assim como alteração na direção do crescimento condilar. Foi também observada uma verticalização dos incisivos superiores e, no arco inferior, aumento na tendência natural de vestibularização dos incisivos inferiores.

Interference of mouth breathing with orthodontic treatment duration in Angle Class II, Division 1

“…According to the literature consulted 15,17,19,20,22 , duration of orthodontic treatment ranged from 16 to 48 months (mean=31.62); this mean value is similar to those observed in this study (39.1 months for the NB group and 35.8 months for AB group), but no studies comparing whether or not respiratory mode was a factor that could affect treatment duration have been found.…”

“…The literature suggests its use also associated with patient collaboration. This appliance is considered functional because it modifies the posture of the mandible in relation to the maxilla 18 , potentiates mandibular growth and restricts maxillary development 19 , in addition to being inexpensive, space-saving, and of easy preparation 20 . Satisfactory results have been observed with its utilization in Angle Class II, Division 1 malocclusions 21 .…”

Mandibular growth and dentoalveolar development in the treatment of Class II, division 1, malocclusion using Balters Bionator according to the skeletal maturation

“…This study used radiographs of a sample composed by 23 Caucasian patients being 09 males and 14 females, with bone ages between 7-10 years, Angle's Class II malocclusion, division 1, and mandibular deficiency. Oblique lateral radiographs, 45° (oblique teleradiography), of right and left hemimandibles, and hand and wrist radiographs were taken by the same technician on the same day, using X-ray machine (Funk Orbital X15), Lanex screens and TMG film with the factors: 82 kVp, 80 mA and 0.5 seconds exposure.…”

“…12,21,23 Regarding mandible, studies with different methodologies have proven that functional therapy in patients with Class II malocclusion, can alter condylar growth and promote mandibular bone remodeling. 26,28 However, the condylar growth is up to nowadays, a controversial and poorly defined fact.…”

“…There are studies already that used similar methodologies 23 however, the clinician still has difficulty in defining the ideal stage to start intervention, because literature is often contradictory, with authors arguing that in young patients the mandibular length increase may occur with the use of these appliances, 5,24 challenged by authors who claim that this form of treatment does not grow the mandible, because puberty is where the child has more growth earnings. 22 The objective of this study is to evaluate the influence of bone maturation, in mandibular and dentoalveolar growth and development, natural and induced by treatment of Class II malocclusion, division 1, with Balters bionator.…”