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Journal of the World Federation of... Feb 2024Anterior open bite can be effectively treated nonsurgically via molar intrusion. This technique, involving the intrusion of posterior teeth using temporary skeletal...
Anterior open bite can be effectively treated nonsurgically via molar intrusion. This technique, involving the intrusion of posterior teeth using temporary skeletal anchorage devices, prompts counterclockwise rotation of the mandible. This rotation not only corrects anterior open bite but also contributes to a decrease in anterior facial height, improvements in lip incompetency, and forward movement of the chin. For successful outcomes, temporary skeletal anchorage devices, installed on both the buccal and palatal sides, must deliver equivalent intrusion force to the maxillary teeth. Treatment planning should consider factors such as skeletal discrepancies, vertical excess, incisor exposure, and configuration of the occlusal plane. Clinicians are advised to closely monitor periodontal changes and consider overcorrection to ensure lasting stability and maintenance of incisal overlap post-treatment.
Topics: Humans; Open Bite; Orthodontic Anchorage Procedures; Tooth Movement Techniques; Cephalometry; Molar
PubMed: 38185583
DOI: 10.1016/j.ejwf.2023.12.006 -
L' Orthodontie Francaise Dec 2016Anterior open bite represents a malocclusion that is still under study because of the still lacking evidence about etiology and best treatment options in growing... (Review)
Review
INTRODUCTION
Anterior open bite represents a malocclusion that is still under study because of the still lacking evidence about etiology and best treatment options in growing subjects according to success rate and stability. Etiology involves the interaction of environmental factors such as prolonged sucking habits, mouth breathing, tongue or lip thrusting, tongue dimension, eruption disturbances with a genetically determined vertical facial growth pattern. The treatment options for the early treatment of anterior open bite are still controversial.
OBJECTIVES
The aim of this study was to evaluate the actual available evidence on treatments of anterior open bite in the mixed dentition in order to assess the effectiveness of the early treatment in reducing open bite, the most efficacious treatment strategy and the stability of the results.
Topics: Child; Humans; Open Bite
PubMed: 27938658
DOI: 10.1051/orthodfr/2016038 -
Journal of Orofacial Orthopedics =... Jan 2019Aim of the present study was to investigate the prevalence of gingival recession and related factors in teeth with low occlusal function (open bite and infraversion)...
PURPOSE
Aim of the present study was to investigate the prevalence of gingival recession and related factors in teeth with low occlusal function (open bite and infraversion) after orthodontic treatment.
METHODS
From January 2014 to December 2017, 403 patients received orthodontic treatment. Their gingival recession and related factors before and after treatment were retrospectively analyzed.
RESULTS
The prevalence of gingival recession in patients with infraversion and open bite after orthodontic treatment were 80.6 and 75.0%, respectively; these values were 43.4 and 47.5% before treatment, respectively. Notably, the Miller index of gingival recession increased after orthodontic treatment (P < 0.05). The risk of gingival recession in patients with infraversion or open bite after orthodontic treatment was remarkably higher than the risk in other patients (odds ratio [OR] = 16.712 and 5.073, respectively); the gingival recession rate was related to treatment with tooth extraction (OR = 2.043), as well as gingival biotype (OR = 0.341) and gingival index (GI) before orthodontic treatment (OR = 97.404; P < 0.05).
CONCLUSIONS
Patients with these two types of low occlusal function are more likely to exhibit gingival recession after orthodontic treatment. Moreover, the prevalence of gingival recession after orthodontic treatment is higher among patients who have undergone tooth extraction during orthodontic treatment, and among those who exhibit thin gingival biotype and high gingival index before orthodontic treatment.
Topics: Adolescent; Female; Gingival Recession; Humans; Male; Malocclusion; Open Bite; Prevalence; Retrospective Studies; Risk Factors; Tooth Movement Techniques; Young Adult
PubMed: 30242441
DOI: 10.1007/s00056-018-0159-8 -
American Journal of Orthodontics and... Oct 2022The objectives of this study were to analyze and quantify molar intrusion after the use of clear aligners and to analyze the relationship with other variables such as...
INTRODUCTION
The objectives of this study were to analyze and quantify molar intrusion after the use of clear aligners and to analyze the relationship with other variables such as age, duration of treatment, and a series of cephalometric osseous and dental measurements at the start of treatment.
METHODS
A retrospective descriptive-analytical study was designed with a sample of 58 patients aged 18-60 years who had undergone treatment with Invisalign. The cephalometric measurements were carried out after lateral x-rays were taken of the cranium; these were compared at the start (T0) and conclusion of treatment. Parametric and nonparametric tests were used to compare means, whereas Pearson correlations and multivariate lineal regression analyses were used to establish the variables associated with molar intrusion.
RESULTS
Approximately 74.2% of the patients presented some degree of molar intrusion after treatment. Furthermore, 32.8% of patients presented intrusion only at the mandibular molar, whereas 25.9% experienced intrusion at both molars, maxillary and mandibular, simultaneously. However, 15.5% presented intrusion only at the maxillary molar. The average magnitude of intrusion here was 0.98 ± 0.54 mm, whereas the mandibular molar was 0.84 ± 0.29 mm. Statistically significant reductions exist for the distance L6_MP and U6_SN between T0 and at conclusion of treatment. Maxillary molar intrusion correlates negatively with mandibular molar intrusion (r = -0.270). The number of days of treatment did not correlate with either maxillary or mandibular molar intrusion.
CONCLUSIONS
Clear aligners give rise to molar intrusion in 74.2% of patients. The cephalometric variables L6_MP T0, mandibular plane angle T0, and facial axis T0 were negatively and significantly associated with maxillary molar intrusion, whereas age and facial axis T0 were negatively associated with mandibular molar intrusion allowing smaller magnitudes of intrusion to be predicted when these variables present high values at T0.
Topics: Cephalometry; Humans; Maxilla; Molar; Open Bite; Orthodontic Appliances, Removable; Retrospective Studies; Tooth Movement Techniques
PubMed: 35305889
DOI: 10.1016/j.ajodo.2021.03.019 -
The Angle Orthodontist Nov 2023To investigate the post-treatment stability of anterior open bite (AOB) cases treated with upper and lower extrusion arches in adults.
OBJECTIVES
To investigate the post-treatment stability of anterior open bite (AOB) cases treated with upper and lower extrusion arches in adults.
MATERIALS AND METHODS
23 patients with AOB were treated with extrusion arches and evaluated for dentoskeletal changes using lateral cephalometric radiographs before treatment (T0), after treatment (T1), and 12 months post-treatment (T2). Patients received bondable tongue spurs and vacuum-formed retainers as post-treatment retention/stability measures for 12 months. Post-treatment stability was further assessed qualitatively by the Photographic Openbite Severity Index.
RESULTS
All the cases showed positive overlap between the anterior teeth at the end of orthodontic treatment, and 20 of 23 treated patients attended the recall visit after 12 months. A total of 85% of the cases maintained positive overlap at least 1 year post-treatment, 10% showed edge-to-edge bite, and only 5% showed no overbite.
CONCLUSIONS
Treatment of AOB in adults with extrusion arches proved to be stable 1 year post-treatment. Changes in the overbite after 1 year of follow-up were not significant.
Topics: Humans; Adult; Open Bite; Follow-Up Studies; Tooth; Malocclusion, Angle Class II; Overbite; Cephalometry
PubMed: 37922388
DOI: 10.2319/030623-155.1 -
American Journal of Orthodontics and... Feb 2019
Topics: Humans; Molar; Open Bite
PubMed: 30712681
DOI: 10.1016/j.ajodo.2018.11.003 -
European Journal of Orthodontics Jun 2016Many orthodontists see open bites as their most demanding assignments; aesthetic issues must be taken into account, the treatment is difficult and the long-term...
Many orthodontists see open bites as their most demanding assignments; aesthetic issues must be taken into account, the treatment is difficult and the long-term stability unpredictable. Myofunctional treatment may not always be the right choice for this category of malocclusions, but it should be given a serious consideration. We need all the help we can get to treat open bites.
Topics: Child; Esthetics, Dental; Humans; Malocclusion; Myofunctional Therapy; Open Bite; Pilot Projects
PubMed: 26666567
DOI: 10.1093/ejo/cjv091 -
The Angle Orthodontist Jan 2019To compare fixed appliances and clear aligner therapy in correcting anterior open bite and in controlling the vertical dimension in adult patients with hyperdivergent...
OBJECTIVES
To compare fixed appliances and clear aligner therapy in correcting anterior open bite and in controlling the vertical dimension in adult patients with hyperdivergent skeletal patterns.
MATERIALS AND METHODS
In this retrospective study, two treatment groups of adult (≥18 years old) hyperdivergent patients (mandibular plane angles of ≥38°) with anterior open bites were included: 17 fixed appliance patients and 36 clear aligner patients. Thirteen cephalometric measurements representing the vertical dimension were reported for each group. A two-sample t-test was used to assess differences in changes in mandibular plane angle and overbite between the two treatment groups.
RESULTS
There were no statistical differences found in the magnitude of overbite correction and the changes in any of the cephalometric measurements for vertical control. The clear aligner group showed a slightly greater amount of lower incisor extrusion ( P = .009). The main mechanism of open bite correction was similar between the two treatment groups and was accomplished through retroclination of the upper and lower incisors while maintaining the vertical position of the upper and lower molars.
CONCLUSIONS
Cephalometric comparison of anterior open bite correction and changes in the mandibular plane angle associated with use of clear aligners and fixed appliances did not demonstrate statistically significant differences in adult hyperdivergent patients.
Topics: Adolescent; Adult; Cephalometry; Humans; Malocclusion, Angle Class II; Mandible; Open Bite; Orthodontic Appliances, Fixed; Retrospective Studies
PubMed: 30280928
DOI: 10.2319/010418-4.1 -
International Orthodontics Jun 2020This study aimed to compare cranial base linear and angular measurements between individuals with skeletal open bite and different sagittal skeletal relationships. (Observational Study)
Observational Study
OBJECTIVE
This study aimed to compare cranial base linear and angular measurements between individuals with skeletal open bite and different sagittal skeletal relationships.
MATERIALS AND METHODS
This observational and cross-sectional study included 101 lateral radiographs of young Latin-American individuals with skeletal open bite that met the inclusion criteria and were collected from a private radiological centre. Three groups were formed. Groups 1, 2 and 3 included individuals with skeletal open bite (negative overbite and FMA>30°) and Class I (n=31), II (n=35) and III (n=35) sagittal skeletal relationship, respectively. The anterior and posterior cranial bases (SN and SBa), and cranial base angles (BaSN and ArSN) were measured. Groups were compared with one-way analysis of variance and post-hoc Scheffé tests. The influence of predictor variables on the cranial base were evaluated with linear regressions (α=0.05).
RESULTS
The cranial base angles were significantly smaller (approximately 3° to 5°) in the skeletal open bite Class III group (BaSN=127.97°± 5.86°, ArSN=120.19°±6.12°) when compared with the other groups. BaSN angle, Class I versus Class III (p<0.001) and Class II versus Class III (p<0.001). ArSN angle, Class I versus Class III (p=0.005) and Class II versus Class III (p=0.026). Multiple linear regressions showed that sex had a significant influence on both cranial base dimensions with men showing larger values than women.
CONCLUSIONS
Skeletal open bite Class III individuals show a smaller cranial base angle than Skeletal open bite Class I or II individuals.
Topics: Analysis of Variance; Cephalometry; Cross-Sectional Studies; Female; Humans; Linear Models; Male; Malocclusion; Open Bite; Skull Base
PubMed: 32037207
DOI: 10.1016/j.ortho.2020.01.002 -
L' Orthodontie Francaise Dec 2021Amelogenesis imperfecta is a genetic disease, characterized by a structural defect of the enamel and has variable clinical expressions. It can be isolated or associated... (Review)
Review
INTRODUCTION
Amelogenesis imperfecta is a genetic disease, characterized by a structural defect of the enamel and has variable clinical expressions. It can be isolated or associated as part of a syndrome. Three clinical forms exist: hypoplastic, hypomature and hypomineralized.
DISCUSSION
Enamel fragility involves dentin exposure and dental hypersensitivity as frequent consequences. Some severe forms are mainly associated with an anterior open bite. The care of these patients constitutes a real challenge for the dentist. Materials et Methods: A literature review was carried out using the PubMed, Web of Science and Scopus interfaces over the past ten years in order to highlight the different treatment options available.
CONCLUSION
From conservative to surgical treatment, it is necessary to develop a collaboration between the orthodontist and the pediatric dentist in order to offer multidisciplinary care adapted to the patient's needs.
Topics: Amelogenesis Imperfecta; Child; Humans; Open Bite
PubMed: 34911673
DOI: 10.1684/orthodfr.2021.64