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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 -
Brazilian Oral Research 2015The aim of this study was to evaluate the association between different types of malocclusion and the impact on quality of life among preschoolers and their families. A...
The aim of this study was to evaluate the association between different types of malocclusion and the impact on quality of life among preschoolers and their families. A cross-sectional study was carried out involving 451 children 3-5 years of age. A clinical exam was performed to evaluate the malocclusions according to criteria proposed by Foster and Hamilton. This examination was conducted by a calibrated dentist. Parents/caregivers answered the Early Childhood Oral Health Impact Scale (ECOHIS) for the assessment of Oral Health-Related Quality of Life (OHRQoL) and the questionnaire on socioeconomic and demographic characteristics. Data analysis involved descriptive statistics, chi-square, Mann-Whitney and hierarchically adjusted Poisson regression. The prevalence of malocclusion was 28.4%. The most frequent conditions were posterior crossbite (20.4%), anterior open bite (9.5%) and increased overjet (8.4%). A significant association was found between anterior open bite and OHRQoL (p < 0.001). The adjusted analysis confirmed the association between anterior open bite and a negative impact on quality of life (PR = 2.55; 95%CI: 1.87 to 3.47; p < 0.001). Anterior open bite was associated with a negative impact on the quality of life of preschoolers.
Topics: Age Distribution; Age Factors; Brazil; Caregivers; Child, Preschool; Cross-Sectional Studies; Female; Humans; Male; Malocclusion; Open Bite; Parents; Prevalence; Quality of Life; Sex Distribution; Sex Factors; Socioeconomic Factors; Statistics, Nonparametric; Surveys and Questionnaires
PubMed: 25741623
DOI: 10.1590/1807-3107BOR-2015.vol29.0046 -
Journal of Personalized Medicine Nov 2023Anterior open bite malocclusion is a complex dental condition characterized by a lack of contact or overlap between the upper and lower front teeth. It can lead to...
Anterior Open Bite Malocclusion: From Clinical Treatment Strategies towards the Dissection of the Genetic Bases of the Disease Using Human and Collaborative Cross Mice Cohorts.
Anterior open bite malocclusion is a complex dental condition characterized by a lack of contact or overlap between the upper and lower front teeth. It can lead to difficulties with speech, chewing, and biting. Its etiology is multifactorial, involving a combination of genetic, environmental, and developmental factors. Genetic studies have identified specific genes and signaling pathways involved in jaw growth, tooth eruption, and dental occlusion that may contribute to open bite development. Understanding the genetic and epigenetic factors contributing to skeletal open bite is crucial for developing effective prevention and treatment strategies. A thorough manual search was undertaken along with searches on PubMed, Scopus, Science Direct, and Web of Science for relevant studies published before June 2022. RCTs (clinical trials) and subsequent observational studies comprised the included studies. Orthodontic treatment is the primary approach for managing open bites, often involving braces, clear aligners, or other orthodontic appliances. In addition to orthodontic interventions, adjuvant therapies such as speech therapy and/or physiotherapy may be necessary. In some cases, surgical interventions may be necessary to correct underlying skeletal issues. Advancements in technology, such as 3D printing and computer-assisted design and manufacturing, have improved treatment precision and efficiency. Genetic research using animal models, such as the Collaborative Cross mouse population, offers insights into the genetic components of open bite and potential therapeutic targets. Identifying the underlying genetic factors and understanding their mechanisms can lead to the development of more precise treatments and preventive strategies for open bite. Here, we propose to perform human research using mouse models to generate debatable results. We anticipate that a genome-wide association study (GWAS) search for significant genes and their modifiers, an epigenetics-wide association study (EWAS), RNA-seq analysis, the integration of GWAS and expression-quantitative trait loci (eQTL), and micro-, small-, and long noncoding RNA analysis in tissues associated with open bite in humans and mice will uncover novel genes and genetic factors influencing this phenotype.
PubMed: 38003932
DOI: 10.3390/jpm13111617 -
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 -
Innovations in Clinical Neuroscience 2023
PubMed: 37387709
DOI: No ID Found -
The Angle Orthodontist Mar 2008To estimate the prevalence and to determine if there is an association between anterior open bite and the presence of speech disorders in a group of Mexican children...
OBJECTIVE
To estimate the prevalence and to determine if there is an association between anterior open bite and the presence of speech disorders in a group of Mexican children with Down syndrome (DS).
MATERIALS AND METHODS
The subjects were a group of Mexican children with Down syndrome (DG) and a control group (CG) of Mexican pediatric patients without disabilities matched by age. The children in both groups came from families having children with anterior open bite and children without it. A parental questionnaire, dental study casts, and a speech test were used to measure the studied variables. Data were analyzed using the chi-square test (chi(2) test), and one-way analyses of variance (ANOVA), followed by the Tukey post hoc test.
RESULTS
Prevalence of anterior open bite was 31.6% in the DG and 22.8% in the CG. The total speech errors by omissions, substitutions, distortions, and additions indicated that there were significant differences between both groups (F = 31.68, P < .001). In general, no significant difference in speech disorders was observed between the DG and the CG regardless of the presence of anterior open bite.
CONCLUSIONS
No association existed between speech disorders and anterior open bite in the samples studied.
Topics: Adolescent; Analysis of Variance; Case-Control Studies; Chi-Square Distribution; Child; Child, Preschool; Down Syndrome; Female; Humans; Male; Mexico; Open Bite; Phonetics; Speech Articulation Tests; Speech Disorders
PubMed: 18251613
DOI: 10.2319/092006-379RR.1 -
Dental Press Journal of Orthodontics 2020This study aimed to compare the root length of maxillary and mandibular incisors between individuals with open bite versus matched individuals with adequate overbite.
OBJECTIVE
This study aimed to compare the root length of maxillary and mandibular incisors between individuals with open bite versus matched individuals with adequate overbite.
METHODS
This comparative, matched and retrospective study included 48 cone beam computed tomographies (CBCTs) obtained at a university radiological center. Scans belonged to 24 individuals with open bite (overbite ≤ 0 mm) and 24 individuals with adequate overbite (controls). Both groups were matched by age, sex, malocclusion classification and skeletal characteristics (ANB and FMA angles). Root length of each maxillary and mandibular incisor was measured in millimeters (mm) in a sagittal section from a perpendicular line to the enamel cement junction until the root apex (384 length measurements were made). The means of root length in both groups were compared using t-tests. In addition, correlations between variables were evaluated with the Pearson correlation coefficient (α = 0.05).
RESULTS
In both groups, the root length of the upper central incisors was approximately 12 mm and the root length of the maxillary lateral incisors was approximately 13 mm (p˃ 0.05). Likewise, the root length of lower central incisors in both groups measured approximately 12 mm (p˃ 0.05). However, the mandibular lateral incisor roots of open bite patients were significantly longer than in the normal overbite patients (approximately 1 mm, p= 0.012 right side, p= 0.001 left side).
CONCLUSIONS
Root length of maxillary incisors and central mandibular incisor is similar in individuals with or without open bite, but the mandibular lateral incisor roots in open bite patients were significantly longer than in the normal overbite patients.
Topics: Cephalometry; Cone-Beam Computed Tomography; Humans; Incisor; Maxilla; Open Bite; Retrospective Studies; Spiral Cone-Beam Computed Tomography
PubMed: 32965383
DOI: 10.1590/2177-6709.25.4.23.e1-7.onl -
The Angle Orthodontist Nov 2022To determine recognition ability and the levels of esthetic tolerance of deep bite and anterior open bite (AOB) among laypeople and investigate the factors affecting...
OBJECTIVES
To determine recognition ability and the levels of esthetic tolerance of deep bite and anterior open bite (AOB) among laypeople and investigate the factors affecting levels of tolerance.
MATERIALS AND METHODS
Using a questionnaire, laypeople (N = 100) were examined, and overbite was measured. They were tested for whether they recognized deep bite and AOB. Esthetic tolerance thresholds for deep bite and AOB were selected by incremental depiction in grayscale images. Stepwise logistic regression analyses were used to quantify the effect of recognition and other factors (age, sex, education level, occupation, history of orthodontic treatment, interest in orthodontic treatment or retreatment, and overbite presence) affecting the tolerance of overbite problems (α = 0.05).
RESULTS
Of the participants, 55% and 94% recognized deep bite and AOB, respectively. Participants with a deep bite were significantly more likely to esthetically tolerate deep bite compared with those without a deep bite (odds ratio [OR], 3.57; 95% confidence interval [CI], 1.29-9.89). Participants who recognized a deep bite problem had significantly lower esthetic tolerance to deep bite compared with participants who did not recognize a deep bite (OR, 0.17; 95% CI, 0.06-0.45). None of the other eight chosen factors significantly affected the tolerance level of AOB (P > .05).
CONCLUSIONS
Participants with a deep bite or those who did not recognize a deep bite had significantly higher esthetic tolerance of deep bite than those without or those who recognized the problem (P < .05).
PubMed: 36409267
DOI: 10.2319/051822-367.1 -
The Angle Orthodontist Jul 1976Intraoral air pressure and rate of oral airflow were measured simultaneously during fricative sound production in ten subjects with anterior open bite and ten subjects... (Comparative Study)
Comparative Study
Intraoral air pressure and rate of oral airflow were measured simultaneously during fricative sound production in ten subjects with anterior open bite and ten subjects with normal occlusion and speech. From these measurements the area of oral port constriction was calculated and the values compared within and between the two groups. Findings revealed that: (1) The area of oral port constriction was very consistent and reproducible in subjects with normal speech production and normal occlusion. (2) The area of oral port constriction was significantly larger in open-bite subjects compared with control subjects for all sounds. (3) Severe anterior open-bite subjects with a vertical defect over five millimeters were found to produce significantly larger oral port openings than those with only moderate open bite (3-5 mm) for most sounds. (4) A direct correlation between the degree of open bite and the area of oral port constriction was found. As the amount of open bite increased, the area of the oral port increased, especially in the severe open-bite group (5 mm and over).
Topics: Adolescent; Adult; Air Pressure; Airway Resistance; Child; Female; Humans; Male; Malocclusion; Mouth; Phonetics; Speech
PubMed: 1066975
DOI: 10.1043/0003-3219(1976)046<0232:AOBAOP>2.0.CO;2 -
Dental Press Journal of Orthodontics 2014Due to the lack of studies that distinguish between dentoalveolar and basal changes caused by the Thurow appliance, this clinical study, carried out by the School of... (Comparative Study)
Comparative Study
INTRODUCTION
Due to the lack of studies that distinguish between dentoalveolar and basal changes caused by the Thurow appliance, this clinical study, carried out by the School of Dentistry--State University of São Paulo/Araraquara, aimed at assessing the dental and skeletal changes induced by modified Thurow appliance.
METHODS
The sample included an experimental group comprising 13 subjects aged between 7 and 10 years old, with Class II malocclusion and anterior open bite, and a control group comprising 22 subjects similar in age, sex and mandibular plane angle. Maxillary/mandibular, horizontal/vertical, dental/skeletal movements (ANS, PNS, U1, U6, Co, Go, Pog, L1, L6) were assessed, based on 14 landmarks, 8 angles (S-N-ANS, SNA, PPA, S-N-Pog, SNB, MPA, PP/MPA, ANB) and 3 linear measures (N-Me, ANS-Me, S-Go).
RESULTS
Treatment caused significantly greater angle decrease between the palatal and the mandibular plane on the experimental group, primarily due to an increase in the palatal plane angle. ANB, SNA and S-N-ANS angles significantly decreased more in patients from the experimental group. PNS was superiorly remodeled. Lower face height (ANS-Me) decreased in the experimental group and increased in the control group.
CONCLUSIONS
The modified Thurow appliance controlled vertical and horizontal displacements of the maxilla, rotated the maxilla and improved open bite malocclusion, decreasing lower facial height.
Topics: Alveolar Process; Anatomic Landmarks; Case-Control Studies; Cephalometry; Child; Chin; Extraoral Traction Appliances; Female; Follow-Up Studies; Humans; Incisor; Male; Malocclusion, Angle Class II; Mandible; Mandibular Condyle; Maxilla; Molar; Nasal Bone; Open Bite; Orthodontic Appliance Design; Palatal Expansion Technique; Palate; Retrospective Studies; Rotation; Sella Turcica; Tooth Movement Techniques; Vertical Dimension
PubMed: 24713556
DOI: 10.1590/2176-9451.19.1.019-025.oar