RESUMEN
Objective: The present study aimed to compare the clinical characteristics of volunteers with temporomandibular dysfunction before and after performing exercises with those of volunteers who only followed self-care guidelines.Methods: A parallel randomized controlled trial was performed. Individuals included underwent the intervention twice a week for one month, while the control group only followed self-care guidelines.Results: Twenty-three volunteers participated; however, during the study, four dropped out. At the end of the study, the degree of depression decreased in the volunteers in the intervention group.Conclusion: The level of pain decreased, but the improvement was not statistically significant and, therefore, could not be attributed to the intervention. It can be concluded that the strategies used to reduce pain in this study were not sufficient for clinical improvement in volunteers with temporomandibular dysfunction.
Asunto(s)
Síndrome de la Disfunción de Articulación Temporomandibular , Terapia por Ejercicio/métodos , Humanos , Dolor , Dimensión del Dolor , Síndrome de la Disfunción de Articulación Temporomandibular/terapia , Resultado del TratamientoRESUMEN
PURPOSE: The aim of the study was to investigate the electroneurophysiological aspects of volunteers with temporomandibular disorders before and after performing isotonic exercises for pain relief and self-care guidelines. METHODS: The study was a parallel controlled randomized controlled trial under protocol 1,680,920. The inclusion criteria were age between 18 and 60 years, muscle temporomandibular dysfunction with or without limitation of mouth opening and self-reported pain with scores between 4 and 10. The individuals were randomized into experimental group and control. Twenty-three volunteers participated in the study, most of then were female. Control group had 11 and experimental group 12 individuals. Dropouts occurred in both groups, two in the experimental group and three in the control group. Since there were an intergroup imbalance the power density was analysed just in experimental group. Electroencephalographic recording was performed before and after the interventions, using the 32-channel apparatus, with sample frequency of 600 Hz and impedance of 5 kΩ. The data were processed through the MATLAB computer program. The individual records filtered off-line, using bandpass between 0.5 and 50 Hz. Epochs of 1,710 ms were created and the calculation of the absolute power density calculated by means of the fast Fourier transform. The statistical approach was inferential and quantitative. RESULTS: The alpha power density analyzed presented a difference, but not significant, when compared in the two moments. CONCLUSION: According to this study, isotonic exercises performed to reduce pain provided a small increase in alpha power density in the left temporal, parietal and occipital regions.
Asunto(s)
Trastornos de la Articulación Temporomandibular , Síndrome de la Disfunción de Articulación Temporomandibular , Adolescente , Adulto , Terapia por Ejercicio , Femenino , Humanos , Masculino , Persona de Mediana Edad , Dolor , Articulación Temporomandibular , Trastornos de la Articulación Temporomandibular/terapia , Resultado del Tratamiento , Adulto JovenRESUMEN
ABSTRACT Purpose The aim of the study was to investigate the electroneurophysiological aspects of volunteers with temporomandibular disorders before and after performing isotonic exercises for pain relief and self-care guidelines. Methods The study was a parallel controlled randomized controlled trial under protocol 1,680,920. The inclusion criteria were age between 18 and 60 years, muscle temporomandibular dysfunction with or without limitation of mouth opening and self-reported pain with scores between 4 and 10. The individuals were randomized into experimental group and control. Twenty-three volunteers participated in the study, most of then were female. Control group had 11 and experimental group 12 individuals. Dropouts occurred in both groups, two in the experimental group and three in the control group. Since there were an intergroup imbalance the power density was analysed just in experimental group. Electroencephalographic recording was performed before and after the interventions, using the 32-channel apparatus, with sample frequency of 600 Hz and impedance of 5 kΩ. The data were processed through the MATLAB computer program. The individual records filtered off-line, using bandpass between 0.5 and 50 Hz. Epochs of 1,710 ms were created and the calculation of the absolute power density calculated by means of the fast Fourier transform. The statistical approach was inferential and quantitative. Results The alpha power density analyzed presented a difference, but not significant, when compared in the two moments. Conclusion According to this study, isotonic exercises performed to reduce pain provided a small increase in alpha power density in the left temporal, parietal and occipital regions.
RESUMO Objetivo O objetivo do estudo foi investigar os aspectos eletroneurofisiológicos de voluntários com disfunção temporomandibular antes e após realização de exercícios para redução de dor e orientações de autocuidado. Método Foi realizado ensaio clínico randomizado controlado paralelo, aprovado por um Comitê de Ética. Os critérios de inclusão foram idade de 18 a 60 anos, disfunção temporomandibular muscular, com ou sem limitação de abertura de boca, e dor autorreferida com escores entre 4 e 10. Os indivíduos foram distribuídos, por sorteio, em grupo experimental ou controle. Participaram do estudo 23 voluntários,11 controles e 12 do grupo experimental sendo a maioria do sexo feminino. Desistências ocorreram, sendo duas no grupo experimental e três no controle. Houve desbalanceamento entre grupos e apenas o experimental foi analisado. Foi realizado registro eletroencefalográfico antes e depois das intervenções, por meio de aparelho com 32 canais, frequência amostral de 600 Hz e impedância de 5 kΩ. Os dados foram processados por meio do programa computacional MATLAB. Os registros individuais filtrados off-line, utilizando passa banda entre 0,5 e 50 Hz. Épocas de 1,710 ms foram criadas e o cálculo da densidade de potência absoluta calculada por meio da transformada rápida de Fourier. A abordagem estatística foi inferencial e quantitativa. Resultados A densidade de potência alfa analisada apresentou diferença, porém não significativa, quando comparada nos dois momentos. Conclusão Pode-se concluir que, com base nesse estudo, os exercícios isotônicos realizados para redução de dor proporcionaram pequeno aumento na densidade de potência alfa nas regiões temporal, parietal e occipital esquerdas.
Asunto(s)
Humanos , Masculino , Femenino , Adolescente , Adulto , Adulto Joven , Trastornos de la Articulación Temporomandibular/terapia , Síndrome de la Disfunción de Articulación Temporomandibular , Dolor , Articulación Temporomandibular , Resultado del Tratamiento , Terapia por Ejercicio , Persona de Mediana EdadRESUMEN
BACKGROUND: Temporomandibular disorders are a group of orofacial pain conditions that are commonly identified in the general population. Like many other chronic pain conditions, they can be associated with anxiety/depression, which can be related to changes in the activity of the dorsolateral prefrontal cortex. Some studies have demonstrated clinical improvement in subjects with chronic pain who are given therapeutic neuromodulation. Transcranial direct current stimulation is a noninvasive brain stimulation technique that allows the modulation of neuronal membranes. This therapy can enhance or inhibit action potential generation in cortical neurons. In some instances, medications acting in the central nervous system may be helpful despite their adverse side effects. It is important to determine if cathodal transcranial direct current stimulation over the dorsolateral prefrontal cortex, an area that modulates emotion and motor cortex excitability, has an analgesic effect on chronic temporomandibular disorders pain. METHOD/DESIGN: The investigators will run a randomized, controlled crossover double blind study with 15 chronic muscular temporomandibular disorder subjects. Each subject will undergo active (1 mA and 2 mA) and sham transcranial direct current stimulation. Inclusion criteria will be determined by the Research Diagnostic Criteria for Temporomandibular Disorders questionnaire, with subjects who have a pain visual analogic scale score of greater than 4/10 and whose pain has been present for the previous 6 months, and with a State-Trait Anxiety Inventory score of more than 42. The influence of transcranial direct current stimulation will be assessed through a visual analogic scale, quantitative sensory testing, quantitative electroencephalogram, and the State-Trait Anxiety Inventory score. DISCUSSION: Some studies have demonstrated a strong association between anxiety/depression and chronic pain, where one may be the cause of the other. This is especially true in chronic temporomandibular disorders, and breaking this cycle may have an effect over the symptoms and associated dysfunction. We believe that by inhibiting activity of the dorsolateral prefrontal cortex though cathodal transcranial direct current stimulation, there may be a change in both anxiety/depression and pain level. Transcranial direct current stimulation may emerge as a new tool to be considered for managing these patients. We envision that the information obtained from this study will provide a better understanding of the management of chronic temporomandibular disorders. TRIAL REGISTRATION: This trial was registered at clinicaltrials.gov on 24 May 2014 (Identifier: NCT02152267 ).
Asunto(s)
Músculos Masticadores/inervación , Corteza Prefrontal/fisiopatología , Trastornos de la Articulación Temporomandibular/terapia , Estimulación Transcraneal de Corriente Directa/métodos , Adolescente , Adulto , Brasil , Protocolos Clínicos , Estudios Cruzados , Método Doble Ciego , Electroencefalografía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Dimensión del Dolor , Proyectos de Investigación , Encuestas y Cuestionarios , Trastornos de la Articulación Temporomandibular/diagnóstico , Trastornos de la Articulación Temporomandibular/fisiopatología , Factores de Tiempo , Resultado del Tratamiento , Adulto JovenRESUMEN
A utilização de questionários pode assegurar oacesso a informações importantes na mudança decomportamentos. Objetivo: Descrever e discutir ametodologia e os instrumentos utilizados em pesquisas comprofissionais da área de Saúde. Material e Métodos: A partirde listas fornecidas por entidades de classe, profissionaisda área de saúde foram contatados pessoalmente e pelainternet para preenchimento do questionário de avaliação doconhecimento sobre procedimentos diagnósticos deneuroimagem e eletroneurofisiologia cortical em pacientescom distúrbios de linguagem. Resultados: não conseguimosacesso a 635 profissionais (97%) e, dos contatados comsucesso, 23 (3%) responderam o questionário utilizado.Dentre os que não participaram, 369 (56%) trabalhavam emhospitais, 66 (10%) não foram acessados, 66 (10%) oendereço se encontrava desatualizado, 41 (6%) tinhamnúmero de telefone errado, 37 (6%) atuavam em outraespecialidade, 30 (5%) estavam indisponíveis, 18 (3%)receberam e não responderam, 9 (1%) negaram opreenchimento. Conclusão: As dificuldades encontradasdurante a execução deste estudo proporcionam uma reflexãoacerca da construção de novos conhecimentos, uma vezque os profissionais envolvidos na prática clínica, e atémesmo na formação acadêmica, não se disponibilizam quandosolicitados a serem voluntários de pesquisa...
The use of questionnaires can ensure accessto important information concerning changing behavior.Objective: In this study we aimed to describe and discussthe methods and tools used in research involving healthprofessionals. Material and Methods: Health careprofessionals were contacted in person or through theinternet to fill out a questionnaire about their knowledge ondiagnostic procedures of neuroimaging and corticalelectroneurophysiology in children with language disorder.Results: A total of 635 professionals (97%) were nonrespondents,and 23 (3%) completed the questionnaires.Among those who did not participate, 369 (56%) worked inhospitals, 66 (10%) could not be reached, 66 (10%) had anoutdated address, 41 (6%) had the wrong phone number, 37(6%) worked with another specialty, 30 (5%) wereunavailable, 18 (3%) received the questionnaire but did notanswer it, and 9 (1%) declined. Conclusion: The difficultiesencountered during the execution of this study provide areflection on the production of new knowledge, sinceprofessionals involved in clinical practice and even inacademic education were not available when asked to beresearch subjects...
Asunto(s)
Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Evaluación en Salud , Personal de Salud , Encuestas y CuestionariosRESUMEN
INTRODUCTION: Advancement genioplasty has been increasingly indicated for the correction of anterior mandibular deficiency as it balances the patient's profile and generates functional changes. OBJECTIVE: Thus, the aim of this study was to assess the effects of advancement genioplasty in the oropharyngeal size and in the position of the hyoid bone and tongue. METHODS: The sample comprised 22 lateral cephalometric radiographs of 11 individuals who had undergone advancement genioplasty alone. Eleven of these radiographs depicted the immediate preoperative period (T0) and the other 11 the postoperative period after at least four months (T1). The radiographs were scanned and exported to the Radiocef Studio 2.0® software (Radio Memory Ltda., Belo Horizonte, MG, Brazil). The landmarks were then identified and automatically measured by the program. RESULTS: The results showed statistically significant differences between the horizontal position of the hyoid bone and tongue and in the oropharyngeal size. The hyoid bone and tongue were repositioned anteriorly after surgery (p = 0.01), thereby increasing the dimension of the oropharyngeal airspace (p = 0.01). CONCLUSIONS: The oropharyngeal dimension increased as the tongue base and hyoid bone were repositioned more anteriorly.
Asunto(s)
Mentón/cirugía , Mentoplastia , Hueso Hioides/fisiopatología , Avance Mandibular , Orofaringe/anatomía & histología , Orofaringe/patología , Lengua/fisiopatología , Adolescente , Adulto , Cefalometría , Femenino , Humanos , Masculino , Persona de Mediana Edad , Músculos del Cuello/fisiología , Tamaño de los Órganos , Estadísticas no Paramétricas , Resultado del Tratamiento , Adulto JovenRESUMEN
INTRODUÇÃO: a cirurgia de avanço de mento isolado tem sido cada vez mais indicada para a correção de deficiência anterior da mandíbula, harmonizando o perfil e gerando alterações funcionais. OBJETIVO: essa pesquisa teve a finalidade de avaliar os efeitos da cirurgia de avanço de mento no tamanho da orofaringe e nas posições do osso hioide e da língua. MÉTODOS: a amostra constou de 22 radiografias cefalométricas de perfil de 11 indivíduos que se submeteram à cirurgia de mentoplastia de avanço isolada. Dessas radiografias, 11 retratavam o período imediatamente pré-cirúrgico (T0) e 11 o pós-cirúrgico de, pelo menos, quatro meses (T1). As radiografias foram digitalizadas e transferidas para o programa Radiocef Studio 2.0, por meio do qual foram feitas as medições entre os pontos demarcados. RESULTADOS: verificaram-se diferenças estatisticamente significativas entre T0 e T1 quanto à posição do osso hioide e da língua no sentido horizontal e ao tamanho da orofaringe. O osso hioide se apresentou posicionado mais anterior em T1 (p = 0,01), assim como a língua, aumentando o tamanho da orofaringe (p = 0,01). CONCLUSÃO: houve aumento do espaço aéreo da orofaringe com o posicionamento mais anterior da base da língua, bem como a reposição do osso hioide anteriormente.
INTRODUCTION: Advancement genioplasty has been increasingly indicated for the correction of anterior mandibular deficiency as it balances the patient's profile and generates functional changes. OBJECTIVE: Thus, the aim of this study was to assess the effects of advancement genioplasty in the oropharyngeal size and in the position of the hyoid bone and tongue. METHODS: The sample comprised 22 lateral cephalometric radiographs of 11 individuals who had undergone advancement genioplasty alone. Eleven of these radiographs depicted the immediate preoperative period (T0) and the other 11 the postoperative period after at least four months (T1). The radiographs were scanned and exported to the Radiocef Studio 2.0® software (Radio Memory Ltda., Belo Horizonte, MG, Brazil). The landmarks were then identified and automatically measured by the program. RESULTS: The results showed statistically significant differences between the horizontal position of the hyoid bone and tongue and in the oropharyngeal size. The hyoid bone and tongue were repositioned anteriorly after surgery (p = 0.01), thereby increasing the dimension of the oropharyngeal airspace (p = 0.01). CONCLUSIONS: The oropharyngeal dimension increased as the tongue base and hyoid bone were repositioned more anteriorly.
Asunto(s)
Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven , Mentón/cirugía , Mentoplastia , Hueso Hioides/fisiopatología , Avance Mandibular , Orofaringe/anatomía & histología , Orofaringe/patología , Lengua/fisiopatología , Cefalometría , Músculos del Cuello/fisiología , Tamaño de los Órganos , Estadísticas no Paramétricas , Resultado del TratamientoRESUMEN
Comparar, por meio de cefalogramas pré e pós-cirúrgicos, as alterações ocorridas no espaço orofaríngeo em decorrência da cirurgia de recuo mandibular e também da associação desta com a impacção e o avanço maxilar posterior. Metodologia: a amostra deste estudo foi composta de 40 telerradiografias cefalométricas laterais. Destas, 20 retratavam o período pré-cirúrgico (T0) e 20 o pós-cirúrgico (T1). Catorze pacientes foram submetidos à cirurgia de recuo isolado de mandíbula e seis, de recuo mandibular associado à impacção e avanço maxilar posterior. Resultados: houve redução estatisticamente significativa (p<0,01) no tamanho da orofaringe após o recuo mandibular isolado. Porém, a associação com a cirurgia ortognática de impacção e avanço maxilar posterior aumentou o tamanho final da orofaringe (p<0,03). Conclusão: a cirurgia de recuo mandibular isolada reduziu o tamanho da orofaringe, ao passo que a cirurgia combinada aumentou este espaço.
How knowledge about the effect of orthognathic surgery of mandibular setback on the size of the oropharynx is an important tool for achieving success in the orthodontic-surgical treatment, the purpose of this study was to compare, using cephalograms before and after surgery, the changes in the oropharyngeal space due to mandibular setback surgery and also the association of this with the posterior maxillary impaction and advancement. Methodology: The study sample consisted of 40 lateral cephalometric teleradiographies. Of these, 20 depicted the pre-surgery (T0) and 20 post-surgery (S1). Fourteen patients underwent surgery for isolated retreat of the mandible and six of mandibular setback associated with the posterior maxillary impaction and advancement. Results: There was a statistically significant reduction (p <0.01) in the size of the oropharynx after isolated mandibular setback. However, the association with orthognathic surgery of maxillary posterior impaction and advancement increased the final size of the oropharynx (p <0.03). Conclusion: The isolated mandibular setback surgery reduced the size of the oropharynx, while the combined surgery increased this space.
Asunto(s)
Humanos , Cefalometría , Mandíbula/cirugía , Orofaringe , Cirugía Bucal , Maloclusión de Angle Clase III , PrognatismoRESUMEN
Como a cirurgia ortognática de avanço mandibular pode trazer benefícios aos pacientes com má-oclusão Classe II esquelética, que são mais propensos a desenvolverem quadros de apneia e hipopneia obstrutiva do sono, esta pesquisa teve a finalidade de avaliar a influência da cirurgia de avanço mandibular com ou sem mentoplastia de avanço, no tamanho da orofaringe e nas posições do osso hioide e da língua. A amostra deste estudo constou de 40 telerradiografias cefalométricas laterais de indivíduos do gênero masculino ou feminino, portadores de classe II esquelética, que se submeteram à cirurgia ortognática de avanço mandibular associada ou não à mentoplastia de avanço. Destas radiografias, 20 retratavam o período pré-cirúrgico (T0) e 20 o pós-cirúrgico (T1). Em seguida, realizaram-se traçados e medições, avaliando-se as distâncias entre as marcações com um paquímetro digital. Verificaram-se diferenças estatisticamente significantes entre T0 e T1 quanto à posição lingual. Esta se apresentou posicionada mais inferior (P<0,05) e anteriormente, aumentando o tamanho da orofaringe (P<0,01). A avaliação do osso hioide, contudo, não mostrou diferenças estatisticamente significantes. Porém, em T1, 17 pacientes apresentaram o osso hioide em posição mais anterior e 12 em posição mais superior. Houve aumento do espaço aéreo da orofaringe com o posicionamento da língua mais ântero-inferior. O osso hioide se movimentou para frente e para cima, na maioria dos casos, apesar de não haver diferença estatística. Além disso, não houve diferenças entre os pacientes que se submeteram à cirurgia de avanço isolado ou associado à mentoplastia de avanço.
As orthognathic surgery of mandibular advancement can bring benefits to patients with skeletal Class II malocclusion, which are more prone to develop frameworks for obstructive sleep apneahypopnea sleep, this research had the purpose to evaluate the influence of surgery for mandibular advancement with or without mentoplasty in advance, the size of the oropharynx and the positions of the hyoid bone and tongue. The sample consisted of 40 lateral cephalometric teleradiographs individuals male or female, individuals with skeletal Class II, submitted to orthognathic surgery for mandibular advancement associated or not with mentoplasty in advance. These radiographs, 20 portrayed the pre-surgery (T0) and 20 post-surgery (T1). Then there were tracings and measurements, is evaluating the distances between the markings with a digital caliper. There were statistically significant differences between T0 and T1 on the tongue position. This is showing lower (P <0.05) and earlier, increasing the size of the oropharynx (P <0.01). The assessment of the hyoid bone, however, showed no statistically significant differences. However, in T1, 17 patients had the hyoid bone in place earlier and 12 more in a position higher. There were increasing the airspace of the oropharynx with the placement of language most antero-inferior. The hyoid bone is moved forward and upward, in most cases, although no statistical difference. Furthermore, there was no difference between patients who underwent the surgery in advance alone or associated with mentoplasty in advance.
Asunto(s)
Humanos , Avance Mandibular , Cirugía Bucal , Apnea , Maloclusión Clase II de Angle , Orofaringe , Hueso Hioides/anatomía & histología , LenguaRESUMEN
OBJETIVO: avaliar a existência de correlação entre a proporção da altura do ramo mandibular (AR) com a altura dentoalveolar posterior total (ADAPT) e a inclinação do plano mandibular (PM). MÉTODOS: dois examinadores avaliaram 81 telerradiografias laterais de pacientes, com idades a partir de 18 anos, do arquivo do curso de especialização em Ortodontia e Ortopedia Facial da Faculdade de Odontologia da UFBA. As radiografias foram digitalizadas, os pontos marcados e as medidas obtidas através do programa Radiocef 1.0. Mediu-se a inclinação do plano mandibular para caracterizar o padrão vertical da face e dividir as radiografias em três grupos: grupo de face normal (GN), de 22º a 28º, de face curta (GC), menor que 22º, e de face longa (GL), maior que 28º. A inclinação do plano palatino serviu como critério de exclusão, sendo que valores abaixo de -2,5º ou acima de 3,5º foram excluídos. Desta forma, 46 telerradiografias laterais totalizaram a amostra. RESULTADOS: a AR diferiu entre GC e GL, porém não houve diferença estatisticamente significante para as alturas dentoalveolares posteriores. Houve baixa correlação entre a AR e a ADAPT nos grupos, no entanto, a correlação da proporção entre essas alturas com a inclinação do PM mostrou-se estatisticamente significante e negativa. CONCLUSÃO: este é um fator a ser levado em consideração na avaliação do PM, quando do diagnóstico e tratamento das displasias verticais dentofaciais.
AIM: This study evaluated the relationship between two cephalometric variables: the mandibular ramus height/posterior alveolar bone height index (MRH/ABH) and the mandibular plane angle (MP). METHODS: Two examiners assessed 81 lateral cephalometric radiographs of at least 18 years old patients, retrieved from the archives of the Orthodontic Department from Federal University of Bahia (Salvador, BA, Brazil). The data input from the cephalogram was accomplished by using Radiocef Studio 1.0 software. The mandibular plane angle was used to assess the vertical growth pattern, in order to divide the sample into three groups: the normal face group (NG, 22º - 28º), the short face group (SG, less than 22º) and the long face group (LG, more than 28º). The palatal plane angle was evaluated as a criterion to exclude radiographs that presented values below -2.5º and above 3.5º. Thus, the final sample consisted of 46 lateral cephalometric radiographs. RESULTS: The ramus height differed between the SG and LG groups; however, there was no significant statistical difference for the posterior alveolar bone height among the three groups. No strong correlation between the mandibular ramus height (MRH) and the posterior alveolar bone height (ABH) was found; nevertheless, the correlation between the mandibular ramus height/posterior alveolar bone height index (MRH/ABH) and the mandibular plane angle (MP) was statistically significant and negative. CONCLUSION: Therefore, we concluded that this index (MRH/ABH) should be considered by orthodontists when evaluating the mandibular plane angle of patients with vertical dysplasias.
Asunto(s)
Proceso Alveolar , Cráneo/crecimiento & desarrollo , Cara , Mandíbula , Nervio Mandibular , RadiografíaRESUMEN
INTRODUÇÃO: avaliar as proporções verticais faciais é um dos parâmetros mais importantes a ser utilizado pelo ortodontista no planejamento da terapia apropriada. Porém, não é raro que, quando se avaliam medidas isoladamente, tenha-se uma idéia errônea do que a face do paciente apresenta em termos de padrão vertical. OBJETIVOS: o presente trabalho realizou diferentes correlações entre a ângulo do plano mandibular (GoGn-SN), o índice de altura facial (IAF) e a sobremordida, avaliando a resposta dessas correlações quanto ao padrão citado na literatura, além de identificar possíveis fatores que, eventualmente, levassem essas medidas a um comportamento fora desse padrão. METODOLOGIA: o estudo foi realizado em radiografias cefalométricas de perfil entre dois grupos de indivíduos brasileiros - um portador de oclusão excelente e outro de má oclusão - atendidos no Curso de Especialização em Ortodontia e Ortopedia Facial da Faculdade de Odontologia da Universidade Federal da Bahia. RESULTADOS: as medidas esqueléticas GoGn-SN e IAF apresentaram forte correlação entre si. A sobremordida, entretanto, não apresentou correlação com essas medidas no grupo com oclusão excelente e demonstrou fraca correlação naquele com má oclusão. Uma correlação coerente com o padrão citado na literatura foi encontrada em 35 por cento e 31 por cento dos indivíduos dos grupos com oclusão excelente e má oclusão, respectivamente. Os indivíduos restantes apresentaram variações na altura dentoalveolar dos incisivos, compensando as displasias verticais. No grupo com oclusão excelente, esse fator se somou às compensações na região de molares. CONCLUSÕES: os resultados encontrados indicam que a maior parte dos grupos apresentou um comportamento diferente do padrão citado na literatura, quando as três medidas foram correlacionadas simultaneamente.
INTRODUCTION: The evaluation of facial vertical proportions is one of the most important features considered by the orthodontist when choosing the appropriate therapy. Meanwhile, when vertical measurements are analyzed separately, one could have an unreliable idea of what the patient's face presents considering vertical development. AIM: The purpose of this research was to perform a correlative analysis between the vertical cephalometric measurements: mandibular plane angle (GoGn-SN), facial height index (FHI) and overbite; to evaluate if the simultaneous correlation of these measurements is in agreement with the results cited in the literature; and to identify the possible factors which could, eventually, lead to different results from those expected. METHODS: This study was performed through cephalometric x-rays obtained from randomly chosen individuals with excellent occlusion and malocclusion, selected from the Orthodontics Program of the Federal University of Bahia. RESULTS: The skeletal measurements GoGn-SN and FHI showed strong correlation. The overbite level did not showed correlation with these measurements in the excellent occlusion group, and showed weak correlation in the malocclusion group. Only 35 percent of the individuals with excellent occlusion showed an expected correlation between the three measurements, while this percentage was of 31 percent in the malocclusion group. The remaining individuals showed variations in the incisor dentoalveolar heights as a major factor in compensating the vertical dysplasia, and in the excellent occlusion group it was also found compensations in the molars area. CONCLUSIONS: The results indicates that the most part of the groups presented a correlation between the three vertical measurements different from the pattern related in the literature.