Stability of Class II treatment with the Bionator followed by fixed appliances

Francisconi, Manoela Fávaro; Henriques, José Fernando Castanha; Janson, Guilherme; Freitas, Karina Maria Salvatore de; Santos, Patrícia Bittencourt Dutra dos

doi:10.1590/1679-775720130002

Cited by 22 publications

(18 citation statements)

References 19 publications

(38 reference statements)

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“…, 13 , 20 , 38 - 40 This means that although some small differences may exist in their mode of action, regarding the amount of dental skeletal changes, they will produce positive significant changes in the overjet and overbite, which are some of the important aspects to be corrected in many Class II malocclusions 7 13 , 39 , 40 …”

Section: Discussionmentioning

confidence: 99%

Effects of Class II division 1 malocclusion treatment with three types of fixed functional appliances

Brito

Henriques

Fiedler

et al. 2019

Dental Press J. Orthod.

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Objective: This study aimed at comparing the dentoskeletal changes in patients with Class II division 1 malocclusion, treated with three types of fixed functional appliances. Methods: A sample comprising 95 patients with the same malocclusion, retrospectively selected, and divided into four groups, was used: G1 consisted of 25 patients (mean age 12.77 ± 1.24 years) treated with Jasper Jumper appliance; G2, with 25 patients (mean age 12.58 ± 1.65 years) treated with the Herbst appliance; G3, with 23 patients (mean age 12.37 ± 1.72 years) treated with the Mandibular Protraction Appliance (MPA); and a Control Group (CG) comprised of 22 untreated subjects (mean age 12.66 ± 1.12 years). Intergroup comparison was performed with ANOVA, followed by Tukey test.Results: The Jasper Jumper and the Herbst group showed significantly greater maxillary anterior displacement restriction. The Jasper Jumper demonstrated significantly greater increase in the mandibular plane angle, as compared to the control group. The MPA group demonstrated significantly greater palatal inclination of the maxillary incisors. Vertical development of the maxillary molars was significantly greater in the Herbst group. Conclusions: Despite some intergroup differences in the amount of dentoskeletal changes, the appliances were effective in correcting the main features of Class II malocclusions.

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Section: Discussionmentioning

confidence: 99%

Effects of Class II division 1 malocclusion treatment with three types of fixed functional appliances

Brito

Henriques

Fiedler

et al. 2019

Dental Press J. Orthod.

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“…The clinical relevance of this is clear with intervention required to address class II malocclusion, while early achievement of a class I incisor relationship is likely to be relatively stable over a period of growth. The latter has variously been confirmed with antero-posterior correction among the more stable orthodontic changes [22,23].…”

Section: Discussionmentioning

confidence: 78%

Skeletal growth in class II malocclusion from childhood to adolescence: does the profile straighten?

Taloumtzi¹,

Padashi-Fard

Pandis

et al. 2020

Prog Orthod.

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Background: There is relatively little appreciation of the changes in maxillary-mandibular relationships occurring during adolescence among subjects with normal and increased overjet. The aim of this study was to assess differences in changes in maxillo-mandibular relationships during the adolescent growth period based on the presence of a normal (< 4 mm) or increased (> 4 mm) overjet in childhood. Our hypothesis was that there is no difference in the change of the A point, nasion, B point (ANB) angle during growth between these two overjet groups. Lateral cephalograms were obtained from 65 subjects taken from the American Association of Orthodontists Foundation (AAOF) Craniofacial Growth Legacy Collections Project. Cephalograms were obtained at ages 7-10 (T0) and 14-17 (T1) with allocation into two groups based on baseline overjet (> 4 mm: group 1, 2-4 mm: group 2). Random effects linear regression was used to account for multiple within-patient measurements with dependent variables including anteroposterior skeletal pattern (based on sella, nasion, A point (SNA); sella, nasion, B point (SNB); and ANB angles). Results: We included a similar number of males (n = 34; 52.3%) and females (n = 31; 47.7%). The mean ANB was higher at baseline in group 1 (5.42, SD 2.16°) than in group 2 (3.08, SD 1.91°). The hypothesis was rejected as the ANB angle reduced by 1.92°more in the larger overjet group with the association being statistically significant after accounting for age and gender (P < 0.001; 95% CI 1.06 to 2.77). No significant gender-related effect (P = 0.624; 95% CI − 0.637 to 1.07) was observed overall. However, there was no significant increase in SNA angle in the > 4 mm overjet group compared to the 2-4 mm group (0.857°, P = 0.271; 95% CI − 0.669 to 2.383). The SNB angle increased by 1.15°m ore in the higher overjet group but there was only weak evidence of an association (P = 0.086; 95% CI − 2.464 to 0.164). Conclusions: A slight straightening of the facial profile was observed in both groups with a statistically significant greater reduction in ANB arising in the group with larger baseline overjet. This translated into a marginal reduction in the overjet in this group.

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“…[10][11][12] Other studies reported similar results on long-term outcomes of bionator treatment based on measurements of dental casts. 15 However, this study was the first to evaluate long-term effects of bionator treatment without follow-up treatment with fixed appliances, thus enabling an assessment of the long-term stability of bionator therapy itself, taking physiological changes due to aging into consideration.…”

Section: Discussionmentioning

confidence: 99%

“…[5][6][7]13,14 Francisconi et al reported that therapy with a bionator followed by fixed appliances produced favorable results in apical base and molar relationships, overjet, and overbite that remained stable 10 years posttreatment. 15 Only a few studies, however, investigated long-term changes of dental arches after functional treatment more than 15 years after treatment. There is no study assessing long-term stability of bionator therapy that was not supplemented by fixed appliances.…”

Section: Introductionmentioning

confidence: 99%

Twenty-year follow-up of functional treatment with a bionator appliance: A retrospective dental cast analysis

Jungbauer¹,

Koretsi²,

Proff³

et al. 2019

The Angle Orthodontist

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Objective: To investigate changes in dental arch configuration, relationship, and malocclusion directly after Class II malocclusion treatment with a Balters bionator modified by Ascher as well as 20 years after treatment. Materials and Methods: Orthodontic dental cast analysis of 18 patients with skeletal Class II treated with a bionator without any additional fixed therapy was performed with a digital caliper at three stages: before (T0), after (T1) and 20 years after (T2) treatment. Arch perimeter and depth, intermolar and intercanine distance, overjet, overbite, sagittal molar and canine relationship, mandibular incisor irregularity (Little's index), and malocclusion (PAR index) were assessed. Results: During treatment (T0–T1), upper arch perimeter significantly increased with a significant decrease in the upper and lower arch perimeter long-term (T1–T2), whereas corresponding arch depths changed only slightly in both periods. Transverse intermolar width increased significantly during treatment, remaining almost constant from T1 to T2. Lower intercanine distance remained fairly unchanged during treatment, but decreased significantly during follow-up. Lower incisor irregularity improved slightly during treatment but increased significantly long-term. After treatment, sagittal molar relationships on both sides were improved, overjet and overbite reduced; these significant changes remained stable long-term. The peer assessment rating (PAR) index was significantly lower after treatment and increased insignificantly during follow-up. Conclusions: 20 years after bionator treatment without additional fixed appliances, the improved sagittal relationship and the reduced overjet and PAR index remained fairly stable. Long-term changes are most likely due to physiological aging processes and are not associated with bionator treatment.

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Stability of Class II treatment with the Bionator followed by fixed appliances

Cited by 22 publications

References 19 publications

Effects of Class II division 1 malocclusion treatment with three types of fixed functional appliances

Effects of Class II division 1 malocclusion treatment with three types of fixed functional appliances

Skeletal growth in class II malocclusion from childhood to adolescence: does the profile straighten?

Twenty-year follow-up of functional treatment with a bionator appliance: A retrospective dental cast analysis

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