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1.
Angle Orthod ; 90(5): 627-633, 2020 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-33378481

RESUMEN

OBJECTIVES: To evaluate the stability of maxillary interincisor diastema closure and the relationship between space relapse and interincisor diastema width, overjet, overbite, angulations between adjacent maxillary anterior teeth and presence of intermaxillary osseous cleft after orthodontic treatment with extractions. MATERIALS AND METHODS: Twenty-four individuals with a maxillary interincisor diastema pretreatment, treated with maxillary first premolar extractions were evaluated. Dental casts and panoramic radiographs taken at pretreatment (T1), posttreatment (T2), and posttreatment follow-up (T3) were assessed. Periapical radiographs at T1 and T2 were also evaluated. Diastema relapse was assumed when T3-T2 interincisor space change was greater than zero. Diastema relapse was considered clinically significant when it was at least 0.50 mm. Data were analyzed using repeated-measures analysis of variance followed by post hoc Tukey tests or Friedman followed by Wilcoxon tests. T-test or Mann-Whitney U-test, Pearson correlation coefficient, and multiple linear regression analyses were also performed. RESULTS: No statistically significant relapse of maxillary interincisor diastemas was found. The percentage of clinically significant relapse of the maxillary interincisor diastemas was 27.78%. Specifically, for the interincisor midline diastema, it was 8.33%. CONCLUSIONS: Maxillary interincisor diastema closure showed no statistically significant relapse after orthodontic treatment with premolar extractions. Clinically significant stability for maxillary interincisor diastema closure was 72.22% and, specifically, for interincisor midline diastema closure, it was 91.67%.


Asunto(s)
Diastema , Maloclusión de Angle Clase II , Sobremordida , Diastema/terapia , Humanos , Incisivo , Maxilar/diagnóstico por imagen
2.
Dental Press J Orthod ; 25(5): 66-84, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33206831

RESUMEN

INTRODUCTION: Moderate and severe bimaxillary protrusion impair the passive lip sealing and the facial and smile esthetics. The extraction of premolars can be avoided by the use of skeletal anchorage to retract both dental arches. This approach brings many advantages such as: prevents premolars extraction; simplifies orthodontic mechanics; there is no volume reduction of a premolar when smiling; control of overbite and gingival exposure. The utilization of this therapeutic approach, when associated with self-ligating brackets, can bring the possibility of spacing the appointments without damage to the treatment efficiency, and allows selection of the most appropriate torque prescriptions for each case. The intra-alveolar miniscrews are indicated for mild cases of bimaxillary protrusion, while extra-alveolar miniscrews may also be indicated for more severe cases. OBJECTIVE: To report the treatment of three cases of mild, moderate and severe bimaxillary protrusion, in which intra- and extra-alveolar miniscrews were used, according to the retraction required. CONCLUSION: The retraction of both upper and lower dental arches using orthodontic intra- and extra-alveolar miniscrews, associated with self-ligating brackets, is an excellent tool to correct mild to severe bimaxillary protrusion, thus reducing the need of premolar extraction and simplifying the orthodontic management.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Métodos de Anclaje en Ortodoncia , Sobremordida , Diente Premolar/cirugía , Estética Dental , Humanos , Técnicas de Movimiento Dental
3.
Am J Orthod Dentofacial Orthop ; 158(5): e63-e72, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-33131569

RESUMEN

INTRODUCTION: This study aimed to assess the stability of compensatory treatment of Class III malocclusion in permanent dentition. METHODS: Thirty-six patients (21 women and 15 men; mean age, 20 years) with Class III malocclusion were subjected to the compensatory treatment of permanent dentition and followed up for at least 3 years after orthodontic treatment (T3). Multivariate Poisson regression was performed to assess the influence of clinical, cephalometric, and dental cast variables at the beginning (T1) and the end of treatment on the stability of Class III malocclusion. RESULTS: Overjet changed from -0.25 mm (-3 to 0.5 mm) at T1 to 1.4 mm (1-2.5 mm) at the end of treatment and 0.8 mm (0-1.5 mm) at T3. Clinical relapse (overjet <1 mm and/or canine Class III relations) was observed in 11 patients (30.6%). Patients treated with extraction of mandibular premolars (risk ratio [RR] = 2.13 × 10-07, P <0.001), with better orthodontic end outcomes (RR = 1.16, P = 0.009) and which had lower maxillary incisor inclination at T1 (RR = 1.08, P = 0.035) showed a lower risk of relapse. Demographic (sex, age), clinical (length of treatment and posttreatment, number of treatment phases, time of Class III elastics), cephalometric (SNA, SNB, ANB, Wits appraisal, SNGoGn, IMPA), and dental cast (peer assessment rating index and arch dimensions) variables were not significantly associated with clinical relapse at T3. CONCLUSIONS: The stability of compensatory treatment of Class III malocclusion in permanent dentition is multifactorial, with few predictive variables. Patients treated with extraction and better orthodontic finishing had a lower risk of relapse, whereas larger maxillary incisor inclination at baseline increased the risk of relapse.


Asunto(s)
Maloclusión de Angle Clase III , Sobremordida , Adulto , Cefalometría , Dentición Permanente , Femenino , Humanos , Masculino , Maloclusión de Angle Clase III/terapia , Mandíbula , Maxilar , Resultado del Tratamiento , Adulto Joven
4.
Am J Orthod Dentofacial Orthop ; 158(6): e137-e150, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33250106

RESUMEN

INTRODUCTION: Anterior open bite (AOB) continues to be a challenging malocclusion for orthodontists to treat and retain long-term. There is no consensus on which treatment modality is most successful. This study reports on the overall success rate of AOB orthodontic treatment in the adult population across the United States, as well as 4 major treatment modalities and other factors that may influence treatment success. METHODS: Practitioners and their adult patients with AOB were recruited through the National Dental Practice-Based Research Network. Patient dentofacial and demographic characteristics, practitioner demographic and practice characteristics, and factors relating to orthodontic treatment were reported. Treatment success was determined from posttreatment (T2) lateral cephalometric films and intraoral frontal photographs. Treatment was categorized into 4 main groups: aligners, fixed appliances, temporary anchorage devices (TADs), and orthognathic surgery. Extractions were also evaluated. Bivariate and multivariable models were used to investigate the association between treatment success and treatment modality, pretreatment (T1) dentofacial characteristics, patient and practitioner demographics, and practice characteristics, adjusting for clustering of patients within practice. RESULTS: A total of 254 patients, enrolled by 84 practitioners, contributed to T2 data for this study. There were 29 patients in the aligner group, 152 in fixed appliances, 20 in TADs, and 53 in surgery. A total of 49 patients underwent extractions of teeth other than third molars. Ninety-three percent finished treatment with a positive overbite on the T2 lateral cephalogram, and 84% finished with a positive vertical overlap of all incisors. The small number of aligners and TAD patients limited the ability to compare success rates in these groups. Patients treated with orthognathic surgery had a higher rate of success compared with those treated with fixed appliances only. Treatment success was also associated with academic practice setting, T1 mandibular plane angle ≤30°, no to mild T1 crowding, and treatment duration <30 months. CONCLUSIONS: The overall success of orthodontic treatment in adult patients with AOB who participated in this study was very high. Orthognathic surgery was the only treatment modality that exhibited a statistically higher odds of successful outcomes. Some T1 dentofacial characteristics and treatment factors were associated with the successful closure of AOB.


Asunto(s)
Maloclusión de Angle Clase II , Mordida Abierta , Sobremordida , Adulto , Cefalometría , Humanos , Mandíbula , Mordida Abierta/terapia
5.
Indian J Dent Res ; 31(4): 601-614, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33107464

RESUMEN

Objective: The aim of this systematic review and meta-analysis was to estimate the prevalence of traumatic dental injuries (TDI) in India. The secondary objective was to evaluate the prevalence rate according to the differences in gender, age, regions, type of TDI and risk factors associated with TDI. Methods: The PubMed, LILACS, Web of Science, Cochrane, CINHAL, and Scopus databases, along with the Public Health Electronic Library, TRoPHI and DoPHER were searched from 1st March to 15thApril 2019 without any restriction of language and year of publication. The qualitative synthesis was done regarding the demographics, study methods, cause of trauma, geographic location, increased overjet and inadequate lip coverage. The meta-analysis was undertaken with STATA-14 software (USA). The pooled prevalence of TDI was calculated using data extracted from 48 studies included in qualitative synthesis and meta-analysis. A sub-group meta-analysis was done by extraction of the data for age groups of 6 years and >6 years. Results: The pooled prevalence of TDI in Indian population was 13 cases in 100 individuals. The prevalence of TDI for age groups of ≤6 was 15% (males, 15%; females, 16%) and for >6 years was 12% (males, 13%; females, 8%). The most common cause of TDI was falls, and most frequent location was home. The odds ratio for occurrence of TDI and inadequate lip-coverage was 3.35 and overjet greater than 3 mm was 3.53. Conclusions: The pooled prevalence of TDI was 13% and slightly higher in children less than 6 years of age. Inadequate lip coverage and increased overjet are the risk factors associated with TDI. Heterogeneity was observed among the studies in terms of design, variables recorded, sampling, study methods and statistical methods. Majority of them also suffered from moderate to high risk of bias.


Asunto(s)
Sobremordida , Traumatismos de los Dientes , Accidentes por Caídas , Niño , Femenino , Humanos , India/epidemiología , Masculino , Prevalencia , Traumatismos de los Dientes/epidemiología
6.
J Contemp Dent Pract ; 21(6): 686-690, 2020 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-33025940

RESUMEN

AIM: To study the prevalence of different malocclusion traits in Najran in Saudi adolescents and adults seeking orthodontic treatment in Najran in Saudi Arabia. MATERIALS AND METHODS: Two hundred and fifty male patients in the age group of 12-35 years who visited faculty of dentistry in Najran University for orthodontic treatment were examined and were divided into two age groups, adolescents and adults. The patients were examined and classified into Class I, Class II, and Class III malocclusions. They were also examined for overjet, overbite, open bite, crossbite, scissor's bite, crowding, and spacing. RESULTS: The prevalence of Angle's malocclusion Classes I, II, and III was 52.8%, 31.6%, and 15.6%, respectively. The most common anomaly was moderate overbite followed by lateral open bite. Posterior crossbite was found to be more prevalent than anterior crossbite. CONCLUSION: Angle's Class I malocclusion was most prevalent type, followed by Class II, and then Class III. CLINICAL SIGNIFICANCE: The findings of this study can be used to formulate an appropriate preventive and orthodontic treatment measures pertaining to the population of adolescent and adult Saudi males.


Asunto(s)
Maloclusión , Mordida Abierta , Sobremordida , Adolescente , Adulto , Niño , Humanos , Masculino , Maloclusión/epidemiología , Prevalencia , Arabia Saudita/epidemiología , Adulto Joven
7.
Rev. ADM ; 77(5): 261-266, sept.-oct. 2020. ilus
Artículo en Español | LILACS | ID: biblio-1147137

RESUMEN

Una de las consecuencias de la desprogramación neuromuscular es la rotación mandibular en sentido horario, evidenciando el punto prematuro de contacto y aumentando la dimensión vertical del paciente. En pacientes clase II con componente vertical, es un problema realizar este tipo de tratamiento, ya que por lo general este efecto de posterorrotación mandibular hace el perfil más convexo, y en algunos casos genera mordida abierta anterior, la cual se debe corregir posteriormente con el tratamiento de ortodoncia, cirugía o prótesis, lo que alarga el tiempo total de tratamiento por la necesidad de control vertical. El presente caso se trata de una mujer de 45 años de edad, dolicofacial, con tendencia a mordida abierta, mordida dual, sobremordida vertical y horizontal disminuidas, motivo de consulta dolor articular, el cual no le permite continuar con sus labores diarias, el tratamiento realizado fue desprogramación neuromuscular con un guarda oclusal inferior con el propósito de aliviar sintomatología articular y control vertical con microtornillos palatinos previo a tratamiento ortodóncico (AU)


One of the effects of the neuromuscular deprogramming treatment is the mandibular clockwise rotation, making the light premature occlusal contact more evident and increasing the patient vertical dimension. In Class II patients with vertical component is difficult to treat them due to profile worsening as an effect of the clockwise rotation creating in some patient's anterior open bite, this has to be corrected later in treatment with orthodontic intrusion, surgery or prosthodontic treatment, increasing the total time of treatment with the vertical control necessity. This case report is a 45 years old patient, dolichofacial, with anterior open bite tendency, dual bite, decreased overjet and overbite, her chief complaint was temporomandibular joint dysfunction which dont allow her to do her daily duties, the treatment for her was neuromuscular deprogramming splint for the temporomandibular joint pain, and vertical control with temporary anchorage devices (miniscrews) before the orthodontic treatment (AU)


Asunto(s)
Humanos , Persona de Mediana Edad , Dimensión Vertical , Síndrome de la Disfunción de Articulación Temporomandibular/terapia , Implantes Dentales , Mordida Abierta/terapia , Rotación , Ferulas Oclusales , Manifestaciones Neuromusculares , Sobremordida/terapia , Mandíbula/fisiología , México
8.
Prog Orthod ; 21(1): 29, 2020 Aug 31.
Artículo en Inglés | MEDLINE | ID: mdl-32864724

RESUMEN

BACKGROUND: The aim of this systematic review was to identify, evaluate, and provide a current literature about the influence of heritability on the determination of occlusal traits. MATERIALS AND METHODS: MEDLINE, SCOPUS, Web of Science, LILACS, and Google Scholar were searched without restrictions up to March 2020. Studies with twin method were considered and the risk of bias assessment was performed using quality of genetic association studies checklist (Q-Genie). The coefficient of heritability (h2), model-fitting approaches, and coefficient correlation were used to estimate the genetic/environmental influence on occlusal traits. The GRADE tool was used to assess the quality of the evidence. RESULTS: Ten studies met the eligibility criteria. Three studies presented good quality, five moderate quality, and two poor quality. Most studies have found that the intra-arch traits, mainly the maxillary arch morphology, such as width (h2 16-100%), length (h2 42-100%), and shape (h2 42-90%), and the crowding, mainly for mandibular arch (h2 35-81%), are under potential heritability influence. The traits concerning the inter-arch relationship, as overjet, overbite, posterior crossbite, and sagittal molar relation, seem not to be genetically determined. The certainty of the evidence was graded as low for all outcomes. CONCLUSIONS: Although weak, the available evidence show that the heritability factors are determinant for the intra-arch traits, namely, arch morphology and crowding. Possibly due they are functionally related, the occlusal traits concerning the maxillary and mandibular relationship seem to have environmental factors as determinants. In this scenario, early preventive approaches can offer a more effective and efficient orthodontic treatment.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Sobremordida , Humanos , Mandíbula , Maxilar
9.
Prog Orthod ; 21(1): 26, 2020 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-32869136

RESUMEN

BACKGROUND: Malocclusion is a highly prevalent public health problem, and several studies have shown its negative correlation with quality of life, self-esteem, and social perceptions. However, its association with bullying is still controversial. OBJECTIVES: To evaluate the relationship between malocclusion and bullying in children and adolescents. SEARCH METHODS: The databases used for the electronic researches were PubMed, Scopus, Lilacs/BBO, Web of Science, and Cochrane Library. Grey literature was reviewed through Open Grey literature with no language or date restrictions. Selection criteria, based on the PECO strategy, were considered eligible observational studies that included schoolchildren or adolescents (P) with malocclusion (E), compared to those with normal occlusion (C), in which the relationship between malocclusion and bullying was determined (O). DATA COLLECTION AND ANALYSIS: Risk of bias evaluation was made for the qualitative synthesis by the Fowkes and Fulton criteria. Data regarding the age of participants and types of malocclusion and of bullying were extracted among other reported data. The quality of the evidence analyzed was evaluated through the GRADE approach. RESULTS: From 2744 articles identified in databases, nine met the eligibility criteria and were included in present systematic review, of which two studies were judged with methodological soundness. The quality of the evidence was classified as very low due to very serious problems for "risk of bias" and "other considerations" and serious problems of "indirectness". The age of participants ranged from 9 to 34 years considering a cohort study, with a bullying recalling perspective. Malocclusion was both evaluated by researchers and self-reported by participants addressing dentofacial characteristics mostly related to the incisors relationship. All studies evaluated the verbal type of bullying, while 3 also considered physical type. Both types were reported as related to malocclusion, although the results showed that extreme maxillary overjet (> 4 mm, > 6 mm, > 9 mm), extreme deep overbite, and having space between anterior teeth or missing teeth were the types of malocclusion with the strongest relations to bullying. CONCLUSIONS: With very low certainty of evidence, the results of this systematic review suggest that conspicuous extreme malocclusion may be related to the occurrence of bullying among children and adolescents.


Asunto(s)
Acoso Escolar , Maloclusión , Sobremordida , Adolescente , Niño , Estudios de Cohortes , Humanos , Calidad de Vida
10.
Prog Orthod ; 21(1): 34, 2020 Sep 07.
Artículo en Inglés | MEDLINE | ID: mdl-32893322

RESUMEN

BACKGROUND: Miniscrews are effective devices for performing upper incisor intrusion. Different mechanics can be applied depending on the treatment objectives. This study aimed to evaluate the efficacy of one or two anterior miniscrews for upper incisor correction in cases of overbite and angulation in adult patients. METHODS: Forty-four adults with deep overbite were divided into two groups: group 1 was treated with one miniscrew between upper central incisors and group 2 with two miniscrews between upper lateral incisors and canines. Incisor intrusion and length were measured from lateral cephalograms before treatment, after treatment and at least 12 months into retention (T0, T1 and T2). Forces were applied (90 g) from the miniscrews to the archwire using elastomeric chains. ANOVA analysis was used to determine whether differences between evaluation times were statistically significant. RESULTS: Mean root resorption was 2.15 ± 0.85 mm, which ceased after active treatment. Overbite mean correction was - 3.23 ± 1.73 mm with no statistically significant relapse. Overbite correction and incisor intrusion were significantly greater in group 2 (- 3.80 ± 1.43 versus - 2.75 ± 1.63 for OB and 8.19 ± 3.66 versus 5.69 ± 2.66 for intrusion). Resorption and overbite correction were positively related. No counterclockwise rotation of the mandibular plane was observed. CONCLUSIONS: Overbite correction can be performed by means of upper incisor intrusion without rotation of the mandibular plane. Correction of upper incisor intrusion and overbite is greater in patients treated with two miniscrews. The increase in upper incisor buccal angulation is greater with one miniscrew. Root resorption is positively related to the extent of intrusion. Stability is satisfactory regardless of whether one or two miniscrews are used.


Asunto(s)
Métodos de Anclaje en Ortodoncia , Sobremordida , Adulto , Cefalometría , Humanos , Incisivo , Maxilar , Estudios Retrospectivos , Técnicas de Movimiento Dental
11.
Dental Press J Orthod ; 25(4): 24-32, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32965384

RESUMEN

OBJECTIVE: The aim of this retrospective study was to evaluate the cephalometric and occlusal changes of orthodontically treated Class III malocclusion patients. METHODS: The experimental groups comprised 37 Class III patients treated: G1) without (n=19) and G2) with extractions (n=18) . The control group (G3), matched by age and sex with the experimental groups, consisted of 18 subjects with untreated Class III malocclusion. Cephalometric (radiographs) and occlusal (study models) changes were assessed between the beginning (T1) and the end (T2) of treatment. Intergroup comparisons were performed with one-way ANOVA followed by Kruskal-Wallis tests (p< 0.05). Occlusal changes were evaluated by the peer assessment rating (PAR) index (ANOVA and Kruskal-Wallis tests), and the treatment outcomes were evaluated by the Objective Grading System (OGS) (t-tests). RESULTS: The experimental groups showed a restrictive effect on mandibular anterior displacement and a discrete improvement in the maxillomandibular relationship. Extraction treatment resulted in a greater retrusive movement of the incisors and significant improvements in the overjet and molar relationship in both groups. The PAR indexes were significantly reduced with treatment, and the OGS scores were 25.6 (G1) and 28.6 (G2), with no significant intergroup difference. CONCLUSIONS: Orthodontic treatment of Class III malocclusion patients with fixed appliances improved the sagittal relationships, with greater incisor retrusion in the extraction group. Both the extraction and non-extraction treatments significantly decreased the initial malocclusion severity, with adequate and similar occlusal outcomes of treatment.


Asunto(s)
Maloclusión de Angle Clase III/diagnóstico por imagen , Maloclusión de Angle Clase III/terapia , Maloclusión de Angle Clase II , Sobremordida , Cefalometría , Humanos , Mandíbula/diagnóstico por imagen , Estudios Retrospectivos , Resultado del Tratamiento
12.
Dental Press J Orthod ; 25(4): 33-43, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32965385

RESUMEN

INTRODUCTION: Anterior crossbite (AC) is defined as a reverse sagittal relationship between maxillary and mandibular incisors. According to an evidence-based orthodontic triage, the treatment need of AC is indicated if any occlusal interference is forcing the mandible towards a Class III growth pattern. Removable and fixed appliances have been suggested to correct AC. OBJECTIVE: The present report aims at presenting the benefits of an alternative therapy for the early treatment of anterior crossbite using clear aligners. METHODS: Two cases of anterior crossbite corrected using clear aligners in 8-years-old children are presented. RESULTS: In both cases, AC was successfully corrected within 5 months. At the end of the treatment, overjet and overbite were corrected. No major discomfort or speech impairment was noticed by the parents. CONCLUSIONS: Due to the perceived shortcomings of alternative approaches, the use of clear aligners for correcting AC in mixed dentition should be considered as a comfortable and well tolerated appliance for young patients.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión/terapia , Aparatos Ortodóncicos Removibles , Sobremordida , Niño , Dentición Mixta , Humanos
13.
J Evid Based Dent Pract ; 20(3): 101423, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32921377

RESUMEN

OBJECTIVE: To compare removable and fixed orthodontic devices in the correction of non-skeletal anterior crossbite in children and adolescents in the mixed dentition. MATERIALS AND METHODS: Electronic searches were conducted in the following databases: PubMed, Web of Science, Scopus, Medline Ovid, Lilacs, US Clinical Trials, and Proquest. A hand search of the reference lists of the included articles and a Google Scholar search were also conducted. References were evaluated by 2 review authors. Articles that met the eligibility criteria were included. Data extraction, methodological quality assessment (Cochrane tool), and strength of the evidence evaluation (GRADE) were also carried out. RESULTS: Seven articles were included. The results showed that removable and fixed devices were equally efficacious for overjet correction. Removable and fixed devices can also present inconveniences regarding pain and discomfort levels, the accomplishment of everyday activities (leisure and school), and the performance of functions, such as chewing and speech. However, treatment time and costs were significantly lower in orthodontic therapy with fixed appliances. Sequence generation, allocation concealment, and complete outcome data were not a concern. Blinding of participants or personnel was not reported in any article, and blinding of the assessor was a concern in 2 articles. Selective reporting was a concern in 2 articles. The certainty of the evidence for overjet correction was very low. CONCLUSION: Removable and fixed orthodontic devices are efficacious for overjet correction in non-skeletal anterior crossbite. However, treatment time and costs are lower for cases treated with fixed devices.


Asunto(s)
Maloclusión , Sobremordida , Adolescente , Niño , Dentición Mixta , Humanos , Maloclusión/terapia
14.
J Oral Rehabil ; 47(12): 1503-1510, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32966657

RESUMEN

OBJECTIVES: To analyse occlusion time, occlusal balance and lateral occlusal scheme in subjects with various dental and skeletal characteristics. METHODS: A total of 132 subjects (50 males and 82 females) seeking orthodontic treatment were included in this prospective study. Using the T-Scan III version 7.0 (Tekscan Inc, South Boston, MA, USA), the occlusion time, occlusal balance and lateral occlusal schemes were recorded and compared with gender, Angle's occlusal classification, overjet, overbite, space analysis, skeletal and transverse relations. ANOVA, t test and contingency tables analyses were performed. Statistical significance was set at P < .05. RESULTS: Occlusion time was significantly shorter in subjects with balanced occlusion (0.18 seconds, P < .001), Class I normal occlusion (0.35 seconds, P = .028) and Class I skeletal profile (0.37 seconds, P = .002). Occlusion time was significantly longer in subjects with decreased overjet (0.60 seconds, P = .003). There were significant associations between the distribution of occlusal balance and Angles' classes of occlusion, skeletal relationship, overjet, overbite and space analysis (P < .05). Lateral occlusal schemes were only associated with Angle's classes of occlusion and skeletal relationship (P < .05). CONCLUSIONS: Patients with Class I occlusion showed the least occlusion time, the most balanced occlusion and a higher frequency of canine guidance. Nonetheless, potentially balanced occlusion and group function were highly prevalent in all groups; therefore, ideal occlusion must be considered an ideal to inspire and aim for, but cannot be considered an essential requirement of every dental treatment.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Sobremordida , Oclusión Dental , Oclusión Dental Balanceada , Femenino , Humanos , Masculino , Estudios Prospectivos
15.
Dental Press J Orthod ; 25(3): 65-72, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32844969

RESUMEN

INTRODUCTION: Fixed functional appliances are non-compliant solutions to Class II malocclusion treatment. The clinician, however, should be careful of unexpected complications during the therapy. METHODS: 58 female adolescents who presented with Class II malocclusion due to deficient mandible were treated with Forsus Fatigue Resistant Device (FFRD) therapy until an overcorrection to an edge to edge incisor relationship was achieved. RESULTS: Incisor relationship and overjet were corrected successfully in all the subjects. Twenty-two patients had a complications-free treatment, while several complications were encountered with the remaining 36 subjects. In particular, mandibular canine rotation and development of posterior crossbites were the most common complications, with percentages of 51.7% and 25.9% respectively. Other complications included the breakage and shearing of the extraoral tubes of the first molar bands, and excessive intrusion of the upper first molars. CONCLUSIONS: FFRD is an efficient appliance for treatment of Class II malocclusion; however, different complications were encountered during the appliance therapy. A focus on taking precautions and applying preventive measures can help to avoid such problems, reducing the number of emergency appointments and enhancing the treatment experience with the appliance.


Asunto(s)
Maloclusión de Angle Clase II , Aparatos Ortodóncicos Funcionales , Sobremordida , Adolescente , Cefalometría , Femenino , Humanos , Mandíbula , Diseño de Aparato Ortodóncico
16.
Shanghai Kou Qiang Yi Xue ; 29(2): 202-207, 2020 Apr.
Artículo en Chino | MEDLINE | ID: mdl-32626886

RESUMEN

PURPOSE: The aim of the study was to investigate the dental changes of patients with obstructive sleep apnea hypopnea syndrome (OSAHS) with long-term treatment of oral appliances, via the method of three-dimensional model analysis. METHODS: Using Geomagic Studio 2014 software, we transferred the dental models, which were from 18 OSAHS patients before and after treatment of oral appliances, into three-dimensional models for digital analysis. Datasets obtained from pre- and after treatment were compared for accuracy via paired t test using SPSS 22.0 software package. RESULTS: Eighteen patients using oral appliances for 6.57±1.98 years, showed significant differences in some dentition values between pre-treatment and after-treatment. The total dentition changes indicated intrusion of upper premolars, buccalization of upper posterior teeth and mesialization of lower posterior teeth. Statistical analysis demonstrated decrease in upper dental arch length, increase in upper posterior arch width and decrease in upper arch depth and dramatic reduction of overjet in anterior teeth. In the same time, other values evaluated showed no significant change before and after treatment of oral appliances. CONCLUSIONS: Long-term wearing oral appliances results in changes in several variables of dental occlusion, which should not be ignored for dentists conducting this treatment plan. However, the side effect of dental occlusion changes is little on a whole, leading to high security in this aspect.


Asunto(s)
Sobremordida , Apnea Obstructiva del Sueño , Diente Premolar , Humanos , Cuidados a Largo Plazo
17.
Dental Press J Orthod ; 25(2): 32-43, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-32490928

RESUMEN

A healthy 15-year-old boy with anterior open bite, edge-to-edge transverse discrepancy, and Class III skeletal relationship sought a nonsurgical orthodontic treatment. The patient was treated with premolars extraction, a Hyrax expander and intrusion mechanics with vertical elastics. This mechanics allowed for excellent facial and occlusal results. The final occlusion presented Class I molar and canine relationships, ideal overjet and overbite, and straight facial profile. Analysis of the posttreatment and follow-up radiographs showed that the treatment outcomes remained stable seven years after active orthodontic treatment. Thus, although combined orthodontic and surgical treatment should be considered for patients with this skeletal malocclusion, this case report proves that well controlled orthodontic movement with the patient's cooperation can be a valid alternative treatment, with good and stable outcomes for patients who refuse surgery.


Asunto(s)
Maloclusión de Angle Clase III , Maloclusión de Angle Clase II , Mordida Abierta , Sobremordida , Adolescente , Cefalometría , Humanos , Masculino , Técnicas de Movimiento Dental
18.
Eur J Paediatr Dent ; 21(2): 115-122, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32567942

RESUMEN

AIM: The aim of this review is to quantify the prevalence and type of malocclusion among children and adolescents during the different stages of dentition worldwide. MATERIALS AND METHODS: Recent studies (from 2009 to 2019), published in Medline, Web of Science and Embase and orthodontic text-books have been comprehensively reviewed herein. The methodological quality of the included studies was assessed using STROBE criteria. RESULTS: After screening 450 records and analysing 284 relevant full-text publications, 77 studies were included in this review. A good degree of evidence was obtained due to the medium-high methodological quality level of included studies. The worldwide prevalence of malocclusion was 56% (95% CI: 11-99), without differences in gender. The highest prevalence was in Africa (81%) and Europe (72%), followed by America (53%) and Asia (48%). The malocclusion prevalence score did not change from primary to permanent dentition with a common score of 54%. Malocclusion traits such as Angle's classes, overjet, overbite, and asymmetrical midline shift essentially did not change their prevalence during different dentitions. Conversely, traits such as cross-bite and diastema reduced their prevalence during permanent dentition, while scissor-bite and dental crowding increased their scores. CONCLUSION: The worldwide high prevalence of malocclusion and its early onset during childhood should induce policymakers as well as paediatric physicians and dentists to devise policies and adopt clinical strategies for preventing malocclusion since younger children's ages.


Asunto(s)
Maloclusión , Sobremordida , Adolescente , Niño , Dentición , Europa (Continente) , Humanos , Prevalencia
19.
J Contemp Dent Pract ; 21(4): 438-444, 2020 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-32584283

RESUMEN

AIM: The purpose of this cross-sectional study was to investigate the influence of maxillary posterior space discrepancy (MPDD) on angulation and vertical position of molars in patients with skeletal class II malocclusions, presenting long, short, and normal vertical growth patterns. MATERIALS AND METHODS: In total, 120 lateral cephalograms of patients (mean age: 23 years) with skeletal class II malocclusion were evaluated. Patients were divided into six groups based on their vertical growth pattern (normal, long, and short faces) and the presence or absence of maxillary posterior discrepancy. Maxillary molars' sagittal angulation and vertical position were measured on cephalograms via Dolphin™ three-dimensional (3D) software (version 11.5). The comparison between groups with the same vertical dimension and different status of MPDD was done with independent t test. The analysis of analysis (ANOVA) was used to make pairwise comparison between all six groups. Finally, a multiple regression analysis was performed to evaluate the influence of molar position and MPDD on the anterior overbite. RESULTS: The results showed that the angulation of the maxillary first molar was not statistically different between groups with the same vertical dimension but varied in terms of MPDD. The maxillary second molar was more distally inclined in patients with MPDD than those without MPDD with short and normal facial types (p value = 0.016 and p value = 0.001, respectively). The second molar had significantly more distal angulation in long face patients than short and normal face participants, without considering the status of MPDD. The upper first and second molars were erupted more in patients with long than short or normal faces, without any influence of MPDD. CONCLUSION: The presence of MPDD caused more distal inclination of the maxillary second molar, in skeletal class II patients with short and normal vertical growth patterns. CLINICAL SIGNIFICANCE: The status of MPDD and its effect on the maxillary second molar teeth should be considered in skeletal class II patients with short and normal vertical growth patterns.


Asunto(s)
Maloclusión de Angle Clase II , Sobremordida , Adulto , Cefalometría , Estudios Transversales , Humanos , Mandíbula , Maxilar , Diente Molar , Adulto Joven
20.
J Orofac Orthop ; 81(4): 267-285, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32556368

RESUMEN

PURPOSE: To systematically search the scientific literature concerning the influence of playing a wind instrument on tooth position and/or facial morphology. METHODS: The PubMed, EMBASE and Cochrane databases were searched up to September 2019. Orthodontic journals were hand searched and grey literature was sought via Google Scholar. Observational studies and (randomized) controlled clinical trials that assessed tooth position and/or facial morphology by profile cephalograms, dental casts or clinical examination were included. The potential risk of bias was assessed. Data from wind instrument players and controls were extracted. Descriptive analysis and meta-analysis were performed. RESULTS: In total, 10 eligible studies with a cross-sectional (n = 7) or longitudinal design (n = 3) and an estimated low to serious risk of bias were included. Sample sizes ranged from 36 to 170 participants, varying from children to professional musicians. Descriptive analysis indicated that adults playing a single-reed instrument may have a larger overjet than controls. Playing a brass instrument might be associated with an increase in maxillary and mandibular intermolar width among children. Longitudinal data showed less increase in anterior facial height among brass and single-reed players between the age of 6 and 15. Children playing a wind instrument showed thicker lips than controls. Meta-analysis revealed that after a follow-up of 6 months to 3 years, children playing brass instruments had a significant reduction in overjet as compared to controls. The magnitude of the effect was of questionable clinical relevance and the generalizability was limited. CONCLUSIONS: Playing a wind instrument can influence tooth position and facial morphology in both children and adults. Aspects that stand out are overjet, arch width, facial divergence/convergence and lip thickness. However, evidence was sparse and the strength of the premise emerging from this review was graded to be "very low".


Asunto(s)
Música , Sobremordida , Diente , Adulto , Niño , Estudios Transversales , Cara , Humanos
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