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Journal of Neuromuscular Diseases 2023Open bite (OB) is a common malocclusion in individuals with orofacial dysfunction and syndromes, especially in neuromuscular diseases.
UNLABELLED
Open bite (OB) is a common malocclusion in individuals with orofacial dysfunction and syndromes, especially in neuromuscular diseases.
OBJECTIVES
The objectives were to explore the prevalence of OB in myotonic dystrophy type 1 (DM1) and Duchenne muscular dystrophy (DMD) and to create and compare orofacial dysfunction profiles.
METHODS
In this database study, 143 individuals with DM1 and 99 with DMD were included. The Mun-H-Center questionnaire and observation chart were used together with the Nordic Orofacial Test -Screening (NOT-S) to create orofacial dysfunction profiles. OB was categorised as: lateral (LOB); anterior (AOB); severe anterior (AOBS); or both types of anterior OB (AOBTot). Descriptive and multivariate statistics were used to compare the OB prevalence and to study associations with orofacial variables, respectively.
RESULTS
There was a statistically significant difference in OB prevalence between the DM1 (37%) and DMD (49%) groups (p = 0.048). LOB was seen in < 1% of DM1 and 18% of DMD. LOB was associated with macroglossia and closed mouth posture, AOB with hypotonic lips, and open mouth posture and AOBS with hypotonic jaw muscles. The orofacial dysfunction profiles showed similar patterns, although the mean NOT-S total scores for DM1 and DMD were 4.2±2.8 (median 4.0, min-max 1-8) and 2.3±2.0 (median 2.0, min-max 0-8), respectively.
LIMITATIONS
The two groups were not age- or gender-matched.
CONCLUSION
OB malocclusion is common in patients with DM1 and DMD and is associated with different types of orofacial dysfunction. This study highlights the need for multi-disciplinary assessments to support tailored treatment strategies that improve or sustain orofacial functions.
Topics: Humans; Muscular Dystrophy, Duchenne; Myotonic Dystrophy; Open Bite; Malocclusion
PubMed: 37334614
DOI: 10.3233/JND-230025 -
The Kaohsiung Journal of Medical... Apr 2018Anterior open bite (AOB) is one of the most complex malocclusions to manage. AOB is caused by either by skeletal, genetic or environmental factors. Numerous treatment... (Review)
Review
Anterior open bite (AOB) is one of the most complex malocclusions to manage. AOB is caused by either by skeletal, genetic or environmental factors. Numerous treatment options are currently utilised to manage AOB. These vary from non-invasive behavioural shaping to orthodontic and surgical interventions. This paper reviews the available orthodontic and non-orthodontic interventions used in the management of AOB. The literature review was carried out using the PubMed search engine from the first of January 2000 to the first of June 2017. Two major keywords (open bite and anterior open bite) were used in addition to 23 minor keywords in the review. AOB is one of the most complex malocclusions to treat with high relapse rates. Long term outcome in treatments of patients with AOB was substantially low. Relapse rates were not taken into consideration for some of the literature reviewed. Despite limitations of the literature, it is recommended that orofacial myofunctional therapy (OMT) and non-orthodontic intervention (NOI) be used in conjunction as an effective treatment option for Anterior Open Bite.
Topics: Child; Child, Preschool; Female; Fingersucking; Humans; Magnets; Male; Myofunctional Therapy; Open Bite; Recurrence; Treatment Outcome
PubMed: 29655410
DOI: 10.1016/j.kjms.2018.01.006 -
British Dental Journal Jun 2021Retention may be particularly challenging after the correction of specific malocclusion features, such as tooth rotations, open bite and expansion, which are all...
Retention may be particularly challenging after the correction of specific malocclusion features, such as tooth rotations, open bite and expansion, which are all inherently unstable. In this article, some indications for active retention are reviewed by highlighting a variety of clinical techniques and appliances. Active retention is discussed in relation to preservation of tooth alignment and in the three planes of space: sagittal, vertical and transverse. In some situations, an active retention regimen may be helpful to minimise or counteract relapse after orthodontic treatment and to improve patient satisfaction during the typically lengthy post-treatment period.
Topics: Cephalometry; Humans; Incisor; Malocclusion; Mandible; Open Bite; Tooth Movement Techniques
PubMed: 34117428
DOI: 10.1038/s41415-021-2952-9 -
The Angle Orthodontist Jul 2022To present a clinical description of the team's treatment techniques.
OBJECTIVES
To present a clinical description of the team's treatment techniques.
MATERIALS AND METHODS
In Part 1, 30 patients underwent segmental maxillary orthodontics, multisegment Le Fort I, and bilateral sagittal osteotomies of the mandible. Part 1 reported excellent occlusal stability at a mean follow-up of 49.43 months (range, 36-92 months). Cases presented in Part 2 were selected based on availability of excellent technique photographs. The same techniques described in Part 2 cases were used on all Part 1 patients.
RESULTS
The coordination of arch widths and forms, overbite, overjet, and maxillary curve of Spee corrections were stable using the team protocols for orthodontic and surgical treatment.
CONCLUSIONS
In the study group, long-term three-dimensionally stable occlusal results were achieved. To duplicate these results, specific orthodontic preparation, intraoperative surgical steps, and postsurgical steps must be carefully planned and executed. These steps are described in this article, Part 2.
Topics: Cephalometry; Humans; Mandible; Maxilla; Open Bite; Osteotomy, Le Fort; Overbite
PubMed: 35293981
DOI: 10.2319/123121-959.1 -
American Journal of Orthodontics and... Feb 2020
Topics: Algorithms; Child; Humans; Open Bite; Oral Health; Quality of Life
PubMed: 32005459
DOI: 10.1016/j.ajodo.2019.11.002 -
International Orthodontics Mar 2021To determine the relationship between AOB and factors such as dental arch dimensions and tongue position during swallowing and phonation.
Anterior open bite and its relationship with dental arch dimensions and tongue position during swallowing and phonation in individuals aged 8-16 years: A retrospective case-control study.
OBJECTIVE
To determine the relationship between AOB and factors such as dental arch dimensions and tongue position during swallowing and phonation.
MATERIAL AND METHODS
A case-control study was performed in two groups: 132 children with Anterior Open Bite (AOB) and 132 with normal vertical overbite (NVO), aged 8-16 years selected from the records taken by a previous study from five public schools. Dental arch dimensions were assessed through digitalized study models. Swallowing was evaluated using the Payne technique, and phoniatric assessment included an adaptation of the articulation test used to describe phonemes.
STATISTICAL ANALYSIS
Chi-Square or Fisher's exact test for comparisons between qualitative variables and the Mann Whitney or T-student were applied to compare the dental arch dimensions according to bite type. A logistic regression model was applied to control the effect of confusion between independent variables and to describe its simultaneous effect on the type of bite.
RESULTS
Intercanine, interpremolar and intermolar widths showed higher values in AOB patients with a mean deviation (MD) of 0.536 (P=0.031), 0.60 (P=0.043) and 1.15, (P<0.001) respectively. Distortions caused by tongue interposition and thrust, tongue protrusion during swallowing, mandibular arch intermolar width, total maxillary arch length, maxillary arch perimeter, and posterior arch depth accounted for 64.6% of AOB and allowed for correct predictions in 83.8% of the cases observed in the study population.
CONCLUSIONS
A significant association between tongue position and function, as well as alterations such as tongue interposition and thrust during swallowing and phonation in individuals with AOB, were observed. There is a relationship between AOB and the presence of a wider mandibular arch and a narrower, longer, and deeper maxillary arch.
Topics: Adolescent; Case-Control Studies; Child; Colombia; Deglutition; Dental Arch; Female; Humans; Male; Malocclusion; Maxilla; Open Bite; Phonation; Retrospective Studies; Schools; Tongue
PubMed: 33518486
DOI: 10.1016/j.ortho.2020.12.005 -
American Journal of Orthodontics and... Jan 2021This single-center 2-arm parallel randomized clinical trial aimed to compare the dentoskeletal effects of bonded spurs combined with posterior build-ups vs conventional... (Randomized Controlled Trial)
Randomized Controlled Trial
INTRODUCTION
This single-center 2-arm parallel randomized clinical trial aimed to compare the dentoskeletal effects of bonded spurs combined with posterior build-ups vs conventional bonded spurs in the treatment of anterior open bite malocclusion in the mixed dentition.
METHODS
Patients aged from 7 to 11 years with anterior open bite, recruited at a university orthodontic clinic, were randomly allocated into 2 groups. The experimental group consisted of patients treated with bonded spurs combined with posterior build-ups. The comparison group comprised patients treated with conventional bonded spurs. Lateral headfilms were obtained at pretreatment and after 12 months of treatment. The primary outcome was the change in the overbite. Randomization was performed using the Web site www.randomization.com. Sequentially numbered opaque and sealed envelopes were used for allocation concealment. Blinding was applicable for outcome assessment only. Intergroup comparisons were performed using t or Mann-Whitney U tests (P <0.05). Mean difference (MD) and 95% confidence interval (CI) were obtained.
RESULTS
The experimental group included 24 patients (17 female, 7 male; mean age, 8.22 ± 1.06 years) and the comparison group comprised 25 patients (14 female, 11 male; mean age, 8.30 ± 0.99 years). Baseline demographic and cephalometric characteristics were similar between groups. After 12 months, all patients showed improvements. Both groups showed similar improvements of the overbite (MD, 0.00 mm; 95% CI, -0.92 to 0.91), similar slight decreases of the gonial (MD, 0.02°; 95% CI, -1.11 to 1.15) and mandibular plane (MD, 0.15°; 95% CI, -0.64 to 0.93) angles, and similar mandibular molar extrusion (MD, 0.14 mm; 95% CI, -0.27 to 0.56). The experimental group showed significantly smaller extrusion of the maxillary first molar than the comparison group (MD, -0.70 mm; 95% CI, -0.92 to -0.49). The other dentoskeletal variables showed similar changes without statistically significant intergroup differences. No serious harm was observed other than plaque accumulation around the spurs.
CONCLUSIONS
Similar overbite increases and dentoskeletal changes were observed in both groups after 12 months of treatment. Although the experimental group showed significantly smaller extrusion of the maxillary molars, no greater counterclockwise rotation of the mandible than the comparison group was observed.
REGISTRATION
This trial was registered at Clinicaltrials.gov (Identifier NCT03702881).
PROTOCOL
The protocol was not published.
FUNDING
This trial was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES), Finance Code 001; and by grants: no. 2017/06440-3, no. 2018/05238-9 and no. 2018/24003-2, São Paulo Research Foundation (FAPESP).
Topics: Brazil; Cephalometry; Child; Female; Humans; Male; Malocclusion, Angle Class II; Mandible; Open Bite
PubMed: 33221096
DOI: 10.1016/j.ajodo.2020.06.031 -
European Journal of Orthodontics Jun 2016The extensive literature concerning the early treatment of anterior open bite (AOB) is still controversial and covers a wide variety of therapeutic approaches. (Review)
Review
BACKGROUND
The extensive literature concerning the early treatment of anterior open bite (AOB) is still controversial and covers a wide variety of therapeutic approaches.
OBJECTIVES
The objective of this study was to provide a comprehensive review evaluating the effectiveness of the orthodontic correction of AOB in growing individuals.
SEARCH METHODS
Search was conducted on PubMed, Embase, Cochrane Library, Web of Science, Scopus, Google Scholar, Scielo, and Lilacs databases. Trials registries were consulted for ongoing trials, and grey literature was also contemplated.
SELECTION CRITERIA
Selection process was performed to include controlled trials enrolling growing subjects who underwent orthodontic treatment to correct AOB and/or hyperdivergent facial pattern.
DATA COLLECTION AND ANALYSIS
Data were grouped and analysed descriptively. Qualitative appraisal was performed according to the Cochrane risk of bias tool, for randomized clinical trials (RCTs), and MINORS tool for non-RCTs.
RESULTS
The 22 studies included in this review mostly considered mixed dentition subjects, and there was a considerable variation regarding therapeutic approaches. Because of poor-quality and/or insufficient evidence, consistent results were not found. However, some useful clinical inferences and suggestions for future studies were provided for each therapeutic modality considered here.
CONCLUSIONS
Additional efforts must still be directed to perform, whenever possible, RCTs; or to conduct prospective controlled trials with adequate sample sizes, consecutively assembled subjects, with the comparison of contemporary and equivalent groups.
Topics: Bias; Controlled Clinical Trials as Topic; Evidence-Based Dentistry; Humans; Open Bite; Orthodontics, Corrective; Prospective Studies; Treatment Outcome
PubMed: 26136439
DOI: 10.1093/ejo/cjv048 -
L' Orthodontie Francaise Jun 2021Posterior open bite is a malocclusion characterized by the absence of vertical contacts between the occlusal surfaces of the posterior teeth of the opposing arches. It...
Posterior open bite is a malocclusion characterized by the absence of vertical contacts between the occlusal surfaces of the posterior teeth of the opposing arches. It can be uni- or bilateral and involve one tooth or more. Several aetiologies of these posterior open bite have been described, including pathological eruptions, dento-maxillary dysmorphosis and temporo-mandibular dysfunctions. When considering a correction or compensation, there are several therapeutic options (orthodontic and/or surgical and/or prosthetic). Recent developments in adhesive dentistry (bonding biomaterials, ceramics and composites) have made possible the development of more conservative approach for restorative and prosthetic treatments. In order to understand the possible use of these restorations and the help it can provide in our treatment plan, we have selected three original clinical situations. Each one illustrated a posterior open bite aetiology and explained the rehabilitation strategies chosen (process of decision making and realization). Partial bonded restorations (direct composites, overlays, tabletops, veenerlays) can be considered to compensate open bite, in case of impossibility, failure or as a complement of orthodontic treatments. Additive equilibration is not described in the literature for the compensation of posterior open bite, despite the many functional advantages along a simple and conservative technique.
Topics: Humans; Malocclusion; Maxilla; Open Bite
PubMed: 34279230
DOI: 10.1684/orthodfr.2021.48 -
American Journal of Orthodontics and... Nov 2018One nonsurgical treatment method for a patient with open bite is to use curved nickel-titanium arches and anterior elastics. The aim of this study was to investigate the...
INTRODUCTION
One nonsurgical treatment method for a patient with open bite is to use curved nickel-titanium arches and anterior elastics. The aim of this study was to investigate the effects of this technique with cone-beam computed tomography.
METHODS
Eighteen open-bite patients' treatment records were used for this retrospective study. The treatment methods were identical for all patients, beginning with the levelling and alignment of the teeth and the placement of maxillary accentuated and mandibular reverse curved archwires with anterior elastics. Cone-beam tomography images were taken and analyzed 3 dimensionally. The paired-samples t test statistical analysis was performed.
RESULTS
A-point moved anteriorly (0.33 mm) and the SN-MP angle increased slightly (1.17°). Maxillary and mandibular incisors were extruded by 2.16 and 1.49 mm, respectively. Overbite increased (4.38 mm). There were no significant changes in the vertical parameters of the premolars and molars.
CONCLUSIONS
The open bite was eliminated by retraction and extrusion of the anterior teeth while maintaining the vertical positions of the molars.
Topics: Adolescent; Alloys; Cephalometry; Cone-Beam Computed Tomography; Humans; Imaging, Three-Dimensional; Male; Mandible; Maxilla; Open Bite; Orthodontic Appliances; Orthodontic Wires; Retrospective Studies; Tooth Movement Techniques; Vertical Dimension
PubMed: 30384940
DOI: 10.1016/j.ajodo.2018.01.021