Tratamento cirúrgico do cisto epidermóide situado anteriormente ao osso hióide: relato de caso / The surgery treatament of epidermoid cyst situated anteriorly to the hyoid bone: case report / Tratamiento quirúrgico del quiste epidermoide situado anterior al hueso hioides: reporte de um caso

O cisto epidermóide (CE) é uma má formação cística de desenvolvimento incomum. Ocorre mais comumente na linha média do assoalho da boca, ocasionalmente localiza-se lateralmente ou em outros sítios. A etiologia do CE ainda é incerta, mas acredita-se que esteja associado a remanentes do ectoderma durante a fusão do primeiro e segundo arcos branquiais. A lesão cresce lentamente sem provocar dor, apresentando-se como massa de consistência semelhante à de borracha ou à massa de pão. Seu diagnóstico se dá por meio de exame clínico e exames complementares de imagem como tomografia computadorizada, ressonância magnética e/ou ultrassonografia, entretanto somente com o exame histopatológico é possível um diagnóstico definitivo. A excisão cirúrgica do cisto é o tratamento de escolha. Quando o diagnóstico é precoce e a intervenção correta, o índice de recidiva torna-se raro. Diante da raridade de casos na região maxilo facial e a dificuldade relacionada ao diagnóstico, o presente trabalho tem como objetivos descrever a ocorrência do cisto epidermóide bem como seu diagnóstico através de exame histopatológico/exames de imagem, tratamento cirúrgico e contribuir com a literatura já existente por meio de um relato de caso que foi diagnosticado no Serviço de Patologia Bucal da Universidade de Gurupi, campus Gurupi/TO.

Epidermoid cysts (EC) is an unusually developing cystic malformation that occurs most frequently in the midline of the floor of the mouth, occasionally located laterally or elsewhere. The etiology of the (EC) still uncertain, but it is believed to be associated with remnants of the ectoderm during the fusion of the first and second branchial arches. The lesion grows slowly without causing pain, presenting itself as a mass with a consistency like of rubber or bread dough. Diagnosis of (EC) is made through complementary imaging tests such as computed tomography, magnetic resonance imaging and/or ultrasound, only histopathological examination it is possible to obtain a definitive diagnosis. Surgical excision of cyst is the treatment of choice. When the diagnosis is made early and the intervention is correct, the recurrence rate is rare. Given the rarity of cases in the maxillofacial region and the difficulty related to diagnosis, this study aims to describe epidermoid cysts occurrence and your diagnostic through of histopathologic/imagine exams, surgical treatment and contribute to the existing literature, through a review and description of a clinical case that was diagnosed at the Oral Pathology Outpatient Clinic at the Faculty of Dentistry - University of Gurupi - UNIRG. Gurupi -Tocantins. Brazil.

El quiste epidermoide (CE) es una malformación quística de desarrollo infrecuente. Ocurre más comúnmente en la línea media del piso de la boca, ocasionalmente se localiza lateralmente o en otra parte. La etiología de la FB aún es incierta, pero se cree que está asociada con restos del ectodermo durante la fusión del primer y segundo arcos branquiales. La lesión crece lentamente sin causar dolor, apareciendo como una masa con una consistencia similar a la de la goma o la masa de pan. Su diagnóstico se realiza a través del examen clínico y pruebas de imagen complementarias como tomografía computarizada, resonancia magnética y/o ultrasonografía, sin embargo, solo con el examen histopatológico es posible un diagnóstico defi nitivo. La escisión quirúrgica del quiste es el tratamiento de elección. Cuando el diagnóstico es temprano y la intervención es correcta, la tasa de recurrencia se vuelve rara. Dada la rareza de los casos en la región maxilofacial y la difi cultad relacionada con el diagnóstico, el presente trabajo tiene como objetivo describir la ocurrencia del quiste epidermoide así como su diagnóstico a través del examen histopatológico/pruebas de imagen, tratamiento quirúrgico y contribuir a la literatura existente a través de un reporte de caso que fue diagnosticado en el Servicio de Patología Oral de la Universidad de Gurupi, campus Gurupi/TO.

Abordagem quantitativa por ultrassonografia para análise do movimento do osso hioide durante a deglutição: revisão integrativa / Quantitative approach to analyze hyoid bone movement during swallowing by ultrasound: an integrative review

RESUMO Objetivo Sintetizar o estado do conhecimento científico sobre quais medidas do movimento do osso hioide durante a deglutição são obtidas pela ultrassonografia e como extraí-las. Estratégia de pesquisa A pergunta PECO e as combinações de descritores e palavras-chave foram formuladas nas bases de dados eletrônicas Medline/PubMed, EMBASE, Web of Science, Scopus and Lilacs. Critérios de seleção Foram incluídos os artigos que utilizaram a ultrassonografia para analisar as medidas de movimento do osso hioide durante a deglutição, independentemente do idioma, ano de publicação ou presença de alteração na deglutição. Análise dos dados Os artigos incluídos foram analisados quanto: ano, local do estudo, desenho do estudo, população, tamanho da amostra, equipamento utilizado, posicionamento do transdutor, medidas obtidas, método de extração e confiabilidade das medidas. Resultados Vinte e seis artigos cumpriram os critérios de elegibilidade. A medida mais frequente foi a de amplitude máxima do movimento, seguida de tempo e velocidade. Houve grande variabilidade quanto à população de estudo, equipamentos utilizados, posicionamento do transdutor e método de extração das medidas, não sendo possível estabelecer padronização. O nível de confiabilidade foi investigado em apenas oito artigos. Conclusão Amplitude, tempo e velocidade são as medidas do movimento do osso hioide durante a deglutição que podem ser obtidas por ultrassonografia. Não há padronização dos métodos de extração dessas medidas.

ABSTRACT Purpose To synthesize the scientific knowledge on which measurements of hyoid bone movement during swallowing are obtained by ultrasonography and how to extract these measures. Research strategies The PECO question and combinations of descriptors and keywords were formulated in the electronic databases Medline/PubMed, EMBASE, Web of Science, Scopus and Lilacs. Selection criteria Articles that used ultrasonography to analyze measurements of hyoid bone movement during swallowing were included, regardless of language, year of publication, or presence of deglutition disorders. Data analysis The included articles were analyzed for: year, study site, study design, population, sample size, equipment used, transducer positioning, measurements obtained, method of extraction, and reliability of measurements. Results Twenty-six articles met the eligibility criteria. The most frequent measurement was hyoid movement maximum amplitude, followed by time and velocity. There was great variability in the study population, equipment used, positioning of the transducer and method of extraction of the measurements. Thus, it was not possible to find a standard model to extract the measures. The level of reliability was investigated in only eight articles. Conclusion Amplitude, time and velocity are the measures of hyoid bone movement during swallowing that can be obtained by ultrasonography. There is no standardization on how to extract these measurements.

Association between the intensity of obstructive sleep apnea and skeletal alterations in the face and hyoid bone / Relação entre a influência da gravidade da apneia obstrutiva do sono e alterações craniofaciais e do posicionamento do osso hioide

Abstract Introduction The association between the intensity of obstructive sleep apnea and skeletal alterations in the face and hyoid bone is still scarcely addressed in the literature. Objective To evaluate whether the intensity of obstructive sleep apnea is associated with craniofacial alterations and the position of the hyoid bone in children with mixed dentition. Methods 76 children aged 7 to 10 years old were examined by otorhinolaryngological evaluation, polysomnography, and orthodontic assessment, including cephalometry. The participants were divided in 3 groups: primary snoring, mild obstructive sleep apnea and moderate to severe obstructive sleep apnea. Cephalometric measures of the face and hyoid bone were assessed. These measures were compared among the different groups by unpaired Student's t test. Moreover, these measures were correlated with the patient's obstructive apnea and hypopnea index variable using Pearson's correlation test. Results Of the 76 children, 14 belonged to group 1, with primary snoring; 46 to group 2, with mild obstructive sleep apnea; and 16 to group 3, with moderate-severe obstructive sleep apnea. There was no difference between the groups regarding the craniofacial variables. Children with obstructive sleep apnea showed a longer distance from the hyoid bone to the mandibular plane when compared to the primary snoring group (p < 0.05). Between the two obstructive sleep apnea subgroups, patients with moderate or severe disease showed significantly shorter horizontal distance between the hyoid bone and the posterior pharyngeal wall (p < 0.05), when compared to the groups with mild obstructive sleep apnea. We also observed a significant positive correlation between obstructive apnea and hypopnea index and the distance from the hyoid to the mandibular plane (p < 0.05) as well as a significant negative association between obstructive apnea and hypopnea index and the horizontal distance from the hyoid to the posterior pharyngeal wall (p < 0.01). Conclusion We did not observe any association between obstructive sleep apnea and linear lateral alterations of the face. In contrast, there is a direct association between obstructive sleep apnea severity and the inferior and posterior position of the hyoid bone in children aged 7 to 10 years old.

Resumo Introdução A relação entre a intensidade da apneia obstrutiva do sono e alterações esqueléticas da face e do hioide em crianças é pouco explorada na literatura. Objetivo Avaliar se a intensidade da apneia obstrutiva do sono correlaciona-se às alterações craniofaciais e ao posicionamento do osso hioide em crianças em fase de dentição mista. Método Foram submetidas 76 crianças entre 7 e 10 anos à avaliação otorrinolaringológica, polissonografia e avaliação ortodôntica, inclusive cefalometria. Os participantes foram divididos em 3 grupos: grupo 1 com ronco primário, grupo 2 com apneia obstrutiva do sono leve e grupo 3 com apneia obstrutiva do sono moderada/grave. Foram analisadas medidas cefalométricas da face e do osso hioide. Essas medidas foram comparadas entre si dentro dos diferentes grupos por teste t de Student não pareado. Além disso, essas medidas foram correlacionadas com a variável índice de apneias obstrutivas e hipopneias do paciente através do teste de correlação de Pearson. Resultados Das 76 crianças, 14 constituíram o grupo 1, ronco primário; 46 o grupo 2, apneia obstrutiva do sono leve; e 16 o grupo 3, apneia obstrutiva do sono moderada/grave. Não se observou diferença significante entre os grupos para as variáveis craniofaciais. Observou-se maior distância do osso hioide ao plano mandibular nos dois grupos com apneia obstrutiva do sono quando comparado ao ronco primário (p < 0,05). Entre os dois subgrupos da apneia obstrutiva do sono, os pacientes com doença moderada ou grave apresentaram distância horizontal entre o hioide e a parede posterior da faringe significantemente menor (p < 0,05), quando comparados aos grupos com apneia obstrutiva do sono leve. Observamos ainda correlação significantemente positiva entre índice de apneias obstrutivas e hipopneias e a distância do hioide ao plano mandibular (p < 0,05) e significantemente negativa entre índice de apneias obstrutivas e hipopneias e distância horizontal do hioide com a parede posterior da faringe (p < 0,01). Conclusão Não observamos relação da apneia obstrutiva do sono com alterações lineares laterais da face. Em contraste, existe relação direta entre a gravidade da apneia obstrutiva do sono e a posição inferior e posterior do osso hioide em crianças entre 7 e 10 anos.

Estudos radiográficos do osso hioide e da coluna cervical nas maloclusões Classe I e Classe II/2ª Divisão de Angle / Radiographic studies of the hyoid bone and cervical spine in Angle Class I and Class II/2nd Division malocclusions

Introduction Interdisciplinary investigative study of the stomatognathic-cervical complex, necessary to understand the structure and biomechanics of the hyoid bone and cervical spine in Class I and II / 2nd Division participants. Objective To analyze the position of the hyoid bone and the curvature of the cervical spine on lateral radiographs of participants with Class I and II/2nd Division Angle malocclusion. Material and method We evaluated the position of the hyoid bone from its alignment with the corresponding cervical vertebra. The presentation of curvature of the cervical spine was evaluated from the fourth cervical vertebra. Result There was a statistically significant difference in the position of the hyoid bone (p=0.027) between the classes, which was located at C3 in Class I and further down, between C3 and C5, in Class II/2nd Division. The cervical spine showed alterations in both classes, with an increase, rectification, and inversion of the curvature with no statistical difference between them (p=0.533). Conclusion In this study, the hyoid bone showed different positions in the malocclusions studied, however, poor posture of the cervical spine was common in both classes.

Introdução Estudo interdisciplinar investigativo do complexo estomatognático-cervical, necessário para compreender a estrutura e a biomecânica do osso hioide e coluna cervical em participantes Classe I e II/2ª Divisão de Angle. Objetivo Analisar a posição do osso hioide e da curvatura da coluna cervical nas radiografias em perfil de participantes com má oclusão Classes I e II/2ª Divisão de Angle. Material e método A posição do osso hioide foi avaliada a partir de seu alinhamento com a vértebra cervical correspondente. A apresentação da curvatura da coluna cervical foi determinada a partir da proximidade com a quarta vértebra cervical. Resultado Houve diferença estatística significativa na posição do osso hioide (p=0,027) entre as classes, que ficou situado em C3 na Classe I e mais abaixo, entre C3 e C5, na Classe II/2ª Divisão. A coluna cervical apresentou alterações em ambas as classes sem diferença estatística entre as mesmas (p=0,533), com aumento, retificação e inversão da curvatura. Conclusão Neste estudo, o osso hioide apresentou posições distintas nas más oclusões estudadas, no entanto, a má postura da coluna cervical foi comum em ambas as classes.

Hyoid displacement patterns in healthy swallowing

ABSTRACT Objective To describe the patterns of displacement of the hyoid bone in healthy individuals, considering their displacements during swallowing of different consistencies. Methods Two hundred one swallowing videofluoroscopy exams of 67 adult and elderly individuals without swallowing disorders were analyzed. Descriptive analysis was performed to identify and describe the patterns of displacement of the hyoid bone. Results Seven types of displacement of the hyoid bone were found: H1 (horizontal), H2 (short vertical and long horizontal), H3 (vertical and diagonal to upper), H4 (long vertical and short horizontal), H5 (vertical), H6 (diagonal), and H7 (brief). The standards were maintained in different consistencies. The most frequent pattern of displacement was type H2. The distribution of the types of displacement of the hyoid was different among men and women. Conclusion Seven patterns of displacement of the hyoid bone during swallowing of normal adults and older people have been described. The most frequent pattern of displacement was horizontal, with variations in distribution between men and women. The displacement pattern was maintained during the swallowing of the three different consistencies (thin, pasty and solid liquid).

Comparison of hyoid bone positions among patients with different sagittal skeletal malocclusions / 口腔疾病防治

Objective@# To compare the hyoid bone position among patients with different sagittal skeletal malocclusions to provide a reference for clinicians to formulate treatment plans.@*Methods@#Lateral cephalograms of 284 orthodontic patients were selected. According to ANB angles, the types of skeletal malocclusion of patients were determined as follows: Class Ⅰ (1° ≤ ANB ≤ 5°), Class Ⅱ (ANB>5°) and Class Ⅲ (ANB<1°). Ten parameters were used to determine hyoid positions. After comparing the hyoid positions of the three groups, stratified analyses based on sex and age were conducted. @*Results @# No significant differences in demographic and vertical facial type features among skeletal Classes Ⅰ, Ⅱ and Ⅲ patients were observed (P>0.05). The angle between the Gonion-hyoid point line and the hyoid point-Menton line (Go-Hy-Me) of Class Ⅱ patients was significantly smaller than that of Class Ⅰ patients, and the angle between the most anterior and inferior point of the third cervical vertebra-hyoid point line and the hyoid point-Sella line (C3-Hy-S) of Class Ⅲ patients was smaller than that of Class I patients (P<0.05). Age-stratified analysis showed that in the juvenile group, the C3-Hy-S of Class Ⅲ patients was significantly smaller than that of Class Ⅰ patients in males and females (P<0.05). In the adult female group, the Go-Hy-Me of Class Ⅱ patients was significantly smaller, and the distance from the hyoid point to the mandibular plane (Hy-MP) was larger than that noted in Class Ⅰ patients (P<0.05); no significant difference in hyoid position between male Class Ⅱ and I patients was observed (P>0.05).@*Conclusions@#Compared with Class Ⅰ patients, the hyoid bone of Class Ⅱ patients in adult females was farther away from the mandible and that of Class Ⅲ patients in juveniles was farther away from the cervical vertebra and posterior cranial base.

Relación morfológica entre el hueso hioides y la mandíbula en una muestra de esqueletos estudiados / Morphological relationship between the hyoid bone and the mandible in a sample of skeletons studied

Introducción: El crecimiento de los tejidos esqueléticos constituye una respuesta secundaria, compensatoria y mecánicamente obligada a cambiar las matrices funcionales. Cuando por alguna razón las matrices funcionales se ven afectadas en su crecimiento, los tejidos esqueléticos responden también con un grado de afectación dependiendo del momento en que esta se produzca. Entonces la mandíbula como parte del viscerocráneo debe presentar esa relación con el hueso hioides de forma directa. Objetivos: Asociar el comportamiento morfológico del hueso hioides con variables morfológicas de la mandíbula y verificar sí la morfología de los huesos pertenecientes a los esqueletos estudiados está determinada por el conjunto de tejidos blandos que los rodea y marcan el ritmo del proceso de remodelación de crecimiento. Material y Métodos: Se realizó la continuación del estudio osteológico en una muestra ósea de 82 esqueletos con mediciones morfométricas del hueso hioides y la mandíbula. Para evaluar la relación de la morfología del hueso hioides con respecto a la mandíbula, se utilizaron matrices de coeficiente de correlación lineal de Pearson en SPSS versión 22 de Window. Resultados: Se corrobora la relación de la morfología del hueso hioides con el crecimiento del viscerocráneo, debido a la correlación positiva y significativa entre varias variables morfológicas del hioides que se obtuvo, -tanto a nivel de su cuerpo como sus astas o cuernos mayores-, con la mandíbula. Conclusiones: Existe una asociación de la morfología del hueso hioides con respecto a la morfología de la mandíbula(AU)

Introduction: The growth of skeletal tissues constitutes a secondary, compensatory and mechanically obliged response to change the functional matrixes. When the growth of functional matrixes is affected for any reason, the skeletal tissues also respond with a degree of affectation depending on the moment in which it occurs. Then the mandible, as part of the viscerocranium, must present that relationship with the hyoid bone directly. Objective: To associate the morphological behavior of the hyoid bone with the morphological variables of the mandible and verify if the morphology of the bones belonging to the skeletons studied is determined by the set of soft tissues that surround them and set the pace of the growth remodeling process. Material and Methods: The continuation of the osteological study was carried out in a bone sample of 82 skulls by performing morphometric measurements of the hyoid bone and the mandible. Pearson's linear correlation coefficient matrices in SPSS Version 22 were used to evaluate the relationship between the morphology of the hyoid bone and the bones of the mandible. Results: The relationship between the morphology of the hyoid bone and the growth of the viscerocranium is corroborated by the positive and significant correlation between several morphological variables of the hyoid bone obtained - both at the level of its body and its greater horns -, and the mandible. Conclusions: These findings corroborate the association between the morphology of the hyoid bone and the growth of the mandible(AU)

Morphology and morphometry of the hyoid bone in a black South African population / Morfología y morfometría del hueso hioides en una población sudafricana negra

SUMMARY: The hyoid is a unique, 'U' shaped bone, located on the anterior aspect of the neck, between the mandible and thyroid cartilage. This bone displays morphological and morphometric characteristics that can assist in determination of age, sex and race of an individual.Therefore, the present study aimed to investigate the morphology and morphometric parameters of the hyoid bone in a Black South African population of KwaZulu-Natal. The morphological and morphometric parameters of the 40 hyoid bones obtained from the Department of Clinical Anatomy, University of KwaZulu-Natal were classified in accordance with Deepak et al. (2013). In this s. tudy, 35 % of hyoid bones were 'U'- shaped and 65 % were 'V'- shaped in males, whereas in the female specimens, 70 % of hyoid bones were 'U'- shaped and 30 % 'V'- shaped. Furthermore, this study recorded a statistically significant relationship between the shape of the hyoid bone and sex. With regard to the morphometry, the width of the hyoid bone was greater in males than females however; the length of the hyoid bone was greater in females than males. In addition, this study concludes that these results may contribute to the existing knowledge on the morphology and morphometry of the hyoid bone and may assist forensic procedures.

RESUMEN: El hioides es un hueso singular en forma de "U", ubicado en la region del cuello anterior, entre la mandíbula y el cartílago tiroides, que presenta características morfológicas y morfométricas que pueden ayudar a determinar la edad, el sexo y la raza de un individuo. El objetivo de este estudio fue investigar la morfología y los parámetros morfométricos del hueso hioides en una población sudafricana negra de KwaZulu-Natal. Los parámetros morfológicos y morfométricos de los 40 huesos hioides obtenidos del Departamento de Anatomía Clínica de la Universidad de KwaZulu-Natal se clasificaron de acuerdo con Deepak et al. En este análisis, en los hombres el 35 % (7/20) de los huesos hioides tenían forma de 'U' y el 65 % (13/20) tenían forma de 'V', mientras que en las mujeres, el 70 % (14/20) de los los huesos hioides tenían forma de 'U' y un 30 % (6/20) de 'V'. Además, se registró una relación estadísticamente significativa entre la forma del hueso hioides y el sexo. En cuanto a la morfometría, el ancho del hueso hioides fue mayor en los hombres que en las mujeres; la longitud del hueso hioides fue mayor en mujeres que en hombres. Además, el estudio concluye que estos resultados pueden contribuir al conocimiento existente sobre la morfología y morfometría del hueso hioides y pueden ayudar a los procedimientos forenses.

Adult Age Estimation of CT Image Reconstruction of the Laryngeal Cartilages and Hyoid Bone Based on Data Mining / 法医学杂志

Objective To explore the feasibility of the CT image reconstruction of laryngeal cartilage and hyoid bone in adult age estimation using data mining methods. Methods The neck thin slice CT scans of 413 individuals aged 18 to <80 years were collected and divided into test set and train set, randomly. According to grading methods such as TURK et al., all samples were graded comprehensively. The process of thyroid cartilage ossification was divided into 6 stages, the process of cricoid cartilage ossification was divided into 5 stages, and the synosteosis between the greater horn of hyoid and hyoid body was divided into 3 stages. Multiple linear regression model, support vector regression model, and Bayesian ridge regression model were developed for adult age estimation by scikit-learn 0.17 machine learning kit （Python language）. Leave-one-out cross-validation and the test set were used to further evaluate performance of the models. Results All indicators were moderately or poorly associated with age. The model with the highest accuracy in male age estimation was the support vector regression model, with a mean absolute error of 8.67 years, much higher than the other two models. The model with the highest accuracy in female adult age estimation was the support vector regression model, with a mean absolute error of 12.69 years, but its accuracy differences with the other two models had no statistical significance. Conclusion Data mining technology can improve the accuracy of adult age estimation, but the accuracy of adult age estimation based on laryngeal cartilage and hyoid bone is still not satisfactory, so it should be combined with other indicators in practice.

Posición hioidea, posición lingual y dimensión de la vía aérea faríngea según maloclusión esquelética

Resumen Esta investigación se centró en revisar los artículos que evaluaron cefalométricamente la posición de hueso hioides, posición lingual y la dimensión de la vía aérea faríngea según maloclusión esquelética, a fin de determinar si existe una relación entre estas estructuras. Método: Se identificaron publicaciones en las bases de datos: PubMed, Biblioteca Virtual en Salud (BVS), Scielo y Scopus. Palabras clave: Hueso hioides, Lengua, Vía aérea, Maloclusión. Se realizó un cribado de los artículos por título, resumen y texto completo, escritos en los idiomas inglés y español. Resultados: Se encontraron 75 artículos; se eliminaron 30, por no tener una relación directa con el tema. Finalmente, se seleccionaron 45 artículos. Se concluye que aún no hay un consenso absoluto, sobre la relación existente entre: la posición del hueso hioides, la lengua y la dimensión de la vía aérea superior; según maloclusión esquelética.

Resumo Esta investigação centrou-se na revisão dos artigos que avaliaram cefalometricamente a posição do osso hióide, a posição linguística e a dimensão da via aérea faríngea de acordo com a maloclusão esquelética, a fim de determinar se existe uma relação entre estes estruturas. Método: As publicações foram identificadas nas seguintes bases de dados: PubMed, Biblioteca Virtual em Saúde (BVS), Scielo e Scopus. Palavras-chave: Osso hióide, Língua, Via aérea, Maloclusão. Os artigos foram analisados por título, resumo e texto completo, escritos em inglês e espanhol. Resultados: Foram encontrados 75 artigos, 30 foram eliminados porque não estavam directamente relacionados com o tema. Finalmente, foram seleccionados 45 artigos. Conclui-se que ainda não existe consenso absoluto sobre a relação entre: a posição do osso hióide, a língua e a dimensão da via aérea superior, de acordo com a maloclusão esquelética.

Abstract This study reviewed the articles that evaluated hyoid bone position, tongue position, and pharyngeal airway dimension according to skeletal malocclusion cephalometrically to determine a connection between these structures. Method: Publications were identified in the following databases: PubMed, Virtual Health Library (VHL), Scielo, and Scopus. Keywords: hyoid bone, tongue, airway, malocclusion. The articles were screened by title, abstract and full text, written in English and Spanish. Results: We found 75 articles; 30 were discarded because they lacked a direct connection with the topic. Finally, 45 articles were selected. There is still no general consensus on the relationship between the position of the hyoid bone, the tongue, and the dimension of the upper airway according to skeletal malocclusion.

Angulação do osso hioide e segurança da deglutição pós-laringectomia parcial horizontal supracricóidea e cricohioidoepiglotopexia / Hyoid bone angle and swallowing safety post supracricoid horizontal partial laryngectomy and cricohyoidoepiglottopexy

RESUMO Objetivo investigar o possível impacto da angulação do osso hioide na segurança da deglutição de pacientes submetidos à laringectomia supracricóidea. Métodos série de casos de 13 adultos, entre 48 e 79 anos, majoritariamente homens (n=11), submetidos à laringectomia supracricóidea em pós-operatório inferior ou igual a dez meses. Realizaram videofluoroscopia da deglutição de 5 ml de líquido fino, 5 ml de alimento pastoso e sólido, em livre oferta. A medida do ângulo do osso hioide foi definida por duas linhas: uma tangente à margem superior do corpo do osso hioide e uma tangente ao ponto mais inferior de sua margem inferior, paralela ao plano horizontal da imagem. O desfecho de aspiração durante o exame seguiu a escala desenvolvida por Rosenbek et al. (1996). Resultados Dos 13 pacientes, 5 apresentaram aspiração silente e 8 não apresentaram aspiração. Dos 5 indivíduos com aspiração, apenas 1 manteve preservadas ambas as cartilagens aritenoides em sua reconstrução e a angulação do osso hioide foi abaixo de 60º, em todos os casos. Dos 8 indivíduos sem aspiração laringotraqueal, a maioria (n=5) apresentava as duas cartilagens aritenoides em sua reconstrução e a angulação do osso hioide foi acima de 60º, em todos os casos. Conclusão uma angulação maior que 60º do osso hioide parece favorecer a proteção das vias aéreas inferiores e promover maior segurança do mecanismo de deglutição.

ABSTRACT Purpose to investigate the possible impact of hyoid bone angulation on swallowing safety in patients undergoing supracricoid laryngectomy. Methods the case series comprised 13 adults, between 48 and 79 years-old, male in its majority (n=11), within ten months or less post-supracricoid laryngectomy and cricohyoidoepiglottopexy. All volunteers were submitted to videofluroscopy at rest and during swallowing of 5 ml of thin fluid, 5 ml of pureed consistency and dry solid food. Images were captured in lateral view. The hyoid angle was taken at rest and defined by two lines: a tangent to the upper margin of the body of the hyoid bone and a horizontal line, tangent to the lowest point of its lower margin. The aspiration was assessed using the scale developed by Rosenbek et al. (1996). Results five cases had silent aspiration and eight had no aspiration. In the group with silent aspiration, only one individual had both arytenoid cartilages preserved, while all individuals had the hyoid bone angle below 60º. In the group without aspiration, five individuals had both cricoarytenoids preserved, while all cases had the average hyoid bone angle above 60º. Conclusion the hyoid bone being at an angle greater than 60º seemed to increase the protection of the lower airways, promoting a safer swallowing mechanism.

Morphometric analysis and sexual dimorphism of hyoid bone in telangana population

Introduction: Determination of sex is of crucial importance in forensic investigations, when only a part of thebody or skeletal remains are available. The present study focussed on the sexual dimorphism of hyoid bone inTelangana population by using morphometric analysis.Materials and methods: The present study was carried out on a total of 60 hyoid bones in which 30 were of maleand 30 were of female individuals. The bones were obtained from the department of Anatomy, Osmania MedicalCollege and Deccan College of Medical Sciences, Hyderabad. Damaged and deformed bones were excluded, andonly fully intact bones were included in the study. Lengths of greater horns, lengths of lesser horns, total hyoidlength, and distance between distal ends of right and left greater horns, width of the body, length of the body andthe thickness of the body of hyoid bone were measured by using sliding calipers.Results: All parameters showed significant difference between the male and female groups. The measurements ofall the parameters were significantly higher in males than in females.Conclusion: All parameters used in the present study confirmed sexual dimorphism in hyoid bone. Hence, hyoidbone can be considered in forensic investigations or anthropological studies to determine the sex of an individual.

Análisis craneocervical en sujetos con respiración oral y nasal / Craneocervical analysis in subjects with oral and nasal breathing

La influencia de la función respiratoria en el desarrollo de estructuras orofaciales y postura craneocervical ha sido ampliamente discutida. El objetivo del estudio fue comparar valores cefalométricos de la región craneocervical e hioidea en sujetos con respiración nasal y oral. Se incluyeron sujetos de entre 18 y 27 años, de ambos sexos, donde 20 presentaban diagnóstico de respiración oral y 20 no presentaban esta alteración; mediante telerradiografía lateral de cabeza y cuello se realizó análisis cefalométrico craneocervical de Rocabado y aplicación de la técnica de Penning, obteniendo medidas craneocervicales e hioideas, dimensión anterior nasofaríngea y curvatura cervical. Para el análisis estadístico se utilizó la prueba de normalidad Shapiro-Wilk y la prueba T para muestras independientes, considerando un valor de p <0,05 para obtener diferencias significativas; en aquellos parámetros en donde no se presentó distribución normal se aplicó la prueba U de Mann-Whitney. No se encontraron diferencias significativas entre los grupos de estudio y los valores cefalométricos analizados, a excepción de la distancia entre la base del hueso occipital y el arco posterior del atlas (p=0,03). Existen limitadas diferencias cefalométricas entre sujetos con respiración oral y respiración nasal, no asociándose el espacio aéreo nasofaríngeo con las modalidades de respiración estudiadas. Deben ser consideradas condiciones de morfología facial o mandibular, para determinar más adecuadamente la influencia de los parámetros cefalométricos en el diagnóstico del modo respiratorio en estudios futuros.

The influence of respiratory function on the development of orofacial structures and craniocervical posture has been widely discussed. The objective of the study was to compare cephalometric values of the craniocervical and hyoid region in subjects with nasal and oral respiration. Subjects between 18 and 27 years of age, of both sexes, were included, where 20 presented oral breathing diagnosis and 20 did not present this alteration; using lateral telerradiography of the head and neck, craniocervical cephalometric analysis was performed of Rocabado and Penning technique was applied, obtaining craniocervical and hyoid measurements, anterior nasopharyngeal dimension and cervical curvature. For the statistical analysis we used the Shapiro-Wilk normality test and the T test for independent samples, considering a value of p <0.05 to obtain significant differences; in those parameters where no normal distribution was presented, the MannWhitney U test was applied. No significant differences were found between the study groups and the cephalometric values ??analyzed, except for the distance between the base of the occipital bone and the posterior arch of the atlas (p=0.03). There are limited cephalometric differences between subjects with oral breathing and nasal breathing, with no association of the nasopharyngeal air space with the breathing modalities studied. Conditions of facial or mandibular morphology should be considered in order to determine more adequately the influence of cephalometric parameters in the diagnosis of the respiratory mode in future studies.

Osificación del ligamento estilohioideo como causa de dolor neuropático grave: enfoque del cirujano de cabeza y cuello / Ossification of the stylohyoid ligament as cause of severe neuropathic pain: approach by the head and neck surgeon

Introducción. La osificación de la cadena estilohioidea es una entidad poco frecuente que se caracteriza por dolor neuropático importante en la región facial y la cervical, secundario a la compresión mecánica de las estructuras vasculares y nerviosas del cuello. Tradicionalmente, se trata de una enfermedad de manejo por el otorrinolaringólogo, aunque en algunos casos es necesaria la intervención del cirujano de cabeza y cuello. Es por ello que, en el presente artículo, se presenta un reporte de caso y se hace una revisión de la literatura científica. Caso clínico. Se presenta el caso de una paciente de 65 años de edad que consultó por dolor cervical y facial serio, secundario a la osificación del complejo estilohioideo, con necesidad de manejo quirúrgico. Por medio de una cervicotomía, se extrajo la pieza osificada, sin complicaciones perioperatorias y resultados favorables. Discusión. La osificación del complejo estilohioideo es una situación poco frecuente, con un cuadro clínico inespecífico y mecanismos fisiopatológicos desconocidos, que puede llevar a circunstancias potencialmente mortales. Para llegar a su diagnóstico, se debe tener un alto grado de sospecha y se confirma con una tomografía de cuello con reconstrucción tridimensional. Su tratamiento es quirúrgico, aunque también se ha descrito el manejo médico. En la literatura médica, no existen estudios que comparen los métodos diagnósticos y terapéuticos para esta entidad, por lo cual, hasta el día de hoy, existen grandes controversias al respecto. Esto hace necesario que se lleven a cabo nuevas investigaciones en este campo

Introduction: Stylohyoid chain ossification is a rare entity characterized by severe neuropathic pain in the facial region secondary to mechanical compression of neurovascular structures of the neck. Traditionally it is a pathology that requires otorhinolaryngological management, although in some cases the intervention of the head and neck surgeon is necessary. That is why in this article we present the management of a patient with this pathology. Clinical case: Our case is a 65-year-old woman who consulted for severe neck and facial pain secondary to the ossification of the stylohyoid complex and the requirement for surgical management. By means of cervicotomy the ossified piece is extracted, without any perioperative complication and favorable results. Discussion: Stylohyoid chain ossification is a rare pathology, with a nonspecific clinical picture which can lead to potentially fatal circumstances. To reach the diagnosis, the surgeon is required to have a high degree of suspicion and confirmation with a neck CT scan with 3D reconstruction. The treatment for this entity is usually surgical, although medical management has also been described. There are no studies reported in the medical literature comparing the diagnostic and therapeutic methods for this entity, so that until today, major controversies in this regard still remains. It becomes necessary new research in this field

Posición del hueso hioides en pacientes con mordida abierta / Hyoid bone position in open bite patients

Objetivo: Evaluar la posición de hueso hioides en pacientes con mordida abierta, mediante el trazado cefalométrico del triángulo hioideo propuesto por Rocabado, Bibby y Preston. Materiales y método: Se analizaron 32 radiografías cefálicas laterales digitales, obtenidas de un centro odontológico de la ciudad de Cuenca, correspondientes a individuos de ambos sexos, entre 5 a 26 años de edad. Las telerradiografías fueron analizadas mediante el programa Nemoceph NX, donde se determinó la posición anteroposterior y vertical del hueso hioides, mediante el trazado cefalométrico del triángulo hioideo propuesto por Rocabado, Bibby y Preston, siendo el mentón, la tercera vértebra cervical y el hueso hioides las estructuras que se utilizaron para realizar dicho trazado. Resultados: Se observó una posición anterosuperior del hueso hioides en individuos con mordida abierta, con un triángulo hioideo positivo, pero no siempre, ya que en algunos de los casos se presentó un triángulo hioideo negativo. Se evidenciaron diferencias estadísticamente negativas entre hombres y mujeres en lo que respecta a la posición vertical del hueso hioides. Esta posición varió en los diferentes grupos etarios, con una posición más superior en un rango de edad menor y descendiendo conforme avanza la edad. Conclusiones: la posición del hueso hioides en pacientes con mordida abierta tiene una tendencia anterosuperior, influenciada por el sexo y la edad. En el presente estudio, casi la mitad de los pacientes presentó un triángulo hioideo positivo (59,4%) pero no en todos los casos, ya que presentaron también un triángulo hioideo negativo (40,6%) (AU)

The effects of electromyographic biofeedback on the swallowing function of stroke survivors with dysphagia / 中华物理医学与康复杂志

Objective To evaluate the effect of intensive electromyographic biofeedback ( EMGBF ) on swallowing and the velocity of hyolaryngeal excursion among stroke survivors with dysphagia. Methods Forty-two stroke survivors with dysphagia were randomly divided into a conventional rehabilitation group ( group A, n=15) , an EMGBF group (group B, n=14) and an intensive EMGBF group (group C, n=13).In addition to routine medica-tions and motor function rehabilitation training, all received 30 minutes of conventional swallowing training once a day, 5 days per week for 4 weeks. Group B additionally received 15 minutes of EMGBF once daily and group C twice daily. Videofluoroscopy was conducted to measure the superior and anterior excursion distances and the movement time of the hyoid bone when swallowing semi-liquid food, and the velocity was calculated. The swallowing dysfunction evaluation and a penetration-aspiration scale ( PAS) were also employed to evaluate the subjects'swallowing function before and after the treatment. Results There were no significant differences among the 3 groups in any of the measurements before the treatment. After the 4 weeks of treatment the average swallowing dysfunction evaluation and PAS scores of all three groups had improved significantly, as had the superior and anterior excursion velocity of the hyoid bone. Compared with group A, the average swallowing dysfunction evaluation and PAS scores of groups B and C had improved significantly more. The average swallowing dysfunction evaluation scores of groups B and C were not sig-nificantly different, but the average anterior and superior excursion velocity of the hyoid bone in group C was signifi-cantly higher than in group B. Conclusion EMGBF therapy has advantages over routine rehabilitation training in improving swallowing function after a stroke and speeding the velocity of the hyoid bone's excursions.

Hyoid Bone Suspension as a Part of Multilevel Surgery for Obstructive Sleep Apnea Syndrome

Abstract Introduction Since oropharyngeal surgery alone is often insufficient to treat obstructive sleep apnea (OSA), advances have been developed in hypopharyngeal surgery. Objective To assess hyoid suspension surgery as part of amultilevel OSA surgery, also including palatal surgery. Methods The study included patients with OSA symptoms with apnea hypopnea index (AHI) > 15. They were scheduled for hyoid suspension after a nasoendoscopy during Müller maneuver and drug induced sleep endoscopy (DISE). All patients had body mass index (BMI) < 35 kg/m2. Hyoidothyroidopexy combined with tonsillectomy and palatal suspension was performed in all cases. Results The mean AHI dropped significantly (p < 0.0001) from 68.4 ± 25.3 preoperatively to 25.6 ± 9.52 postoperatively. The mean lowest oxygen (O2) saturation level increased significantly from 66.8 ± 11.3 to 83.2 ± 2.86 (p < 0.0001). In addition, the snoring score significantly decreased (p < 0.0001) from a preoperative mean of 3.4 ± 0.54 to 2 ± 0.7 at 6 months postoperatively. In regard to the Epworth sleepiness scale (ESS), it showed significant improvements (p < 0.0001) as its mean diminished from 13.8 ± 5.4 preoperatively to 5.2 ± 1.6 postoperatively. Conclusion Hyoidothyroidopexy using absorbable suture seems to produce a good outcome in treating OSA. It could be effectively and safely combined with other palatal procedures in the multilevel surgery for OSA.

Traumatic injury to the internal carotid artery by the hyoid bone: a rare cause of ischemic stroke

Central nervous system (CNS) ischemic events, besides being a common and devastating disease, are accompanied by severe disability and other morbidities. The cause of such events is not always that simple to diagnose, and among the young, a broad spectrum of possibilities should be considered. We present the case of a young man who presented two episodes of CNS ischemia with a 1 year gap between them, which occurred in the same situation while he was walking and carrying a heavy backpack. The second event first presented as a transient ischemic attack followed by a stroke the day after. The diagnostic work-up showed an indentation of the greater cornu of the hyoid bone over the internal carotid artery, which injured the media and intimal layers. At the arterial injury site, a micro thrombus was found, which explained the source of the embolic event to the CNS. The patient was operated on, and the procedure included the resection of the posterior horn of the hyoid bone, the resection of the injured segment of the internal carotid artery followed by carotid­carotid bypass with the great saphenous vein. The postoperative period and the recovery were uneventful as was the 5-month follow-up. We call attention to this unusual cause of stroke and present other cases reported in the literature.

Influence of Nasogastric Tubes on Swallowing in Stroke Patients: Measuring Hyoid Bone Movement With Ultrasonography

OBJECTIVE: To investigate the influence of a nasogastric tube (NGT) on swallowing simulated saliva in stroke patients. METHODS: Three groups of participants were enrolled into the study: group A (20 stroke patients with a NGT), a control group B (25 stroke patients without a NGT), and group C (25 healthy adults with no brain lesions or dysphagia). Participants swallowed 1 mL of water to simulate saliva. Patients in group A were tested twice: once with a NGT (group A1) and once after the NGT was removed (group A2). The distance of hyoid bone movement was measured by subtracting the shortest distance between the mandible and hyoid bone (S) from the distance at resting state (R) measured with ultrasonography. The degree of the movement was calculated by (R–S)/R. The trajectory area of hyoid bone movement (Area) and the interval between the beginning of hyoid bone movement and the moment of the shortest hyoid−mandible approximation (Interval) was calculated by a computer program. RESULTS: From group A: R–S and (R–S)/R of group A2 at 1.14±0.36 cm and 0.30±0.09 cm and were significantly greater than those of group A1 at 0.81±0.36 cm and 0.22±0.08 cm (p=0.009 and p=0.005). After removing the NGT as seen in group A2, R–S and (R–S)/R were improved to the level of those of group B at 1.20±0.32 cm and 0.30±0.09 cm (p=0.909 and p=0.997). The Area of group A2 was larger and the Interval of group A2 was shorter than those of group A1 though a comparison of these factors between A2 and A1 did not show a statistically significant difference. CONCLUSION: A NGT interferes with the movement of the hyoid bone when swallowing 1 mL of water in stroke patients though the movement is restored to normal after removing the NGT.

Changes in Hyolaryngeal Movement During Swallowing in the Lateral Decubitus Posture

OBJECTIVE: To investigate the differences in hyolaryngeal kinematics at rest and during swallowing in the upright sitting (UP) and the lateral decubitus (LD) postures in healthy adults, and delineating any potential advantages of swallowing while in the LD posture. METHODS: Swallowing was videofluoroscopically evaluated in 20 healthy volunteers in UP and LD postures, based on the movements of hyoid bone, vocal folds, and the bolus head. Parameters included the Penetration-Aspiration Scale (PAS), horizontal and vertical displacement, horizontal and vertical initial position, horizontal and vertical peak position, time to peak position of the hyoid bone and vocal folds, and pharyngeal transit time (PTT). RESULTS: Nine participants were rated PAS 2 in the UP and 1 was rated PAS 2 in the LD (p=0.003) at least 1 out of 3 swallows each posture. The hyoid and vocal folds showed more anterior and superior peak and initial positions in the LD. In addition, swallowing resulted in greater vertical and smaller horizontal displacement of the hyoid in LD posture compared with UP. Time to peak position of the hyoid was shorter in LD. The maximal vertical and horizontal displacement of the vocal folds, and PTT were comparable between postures. CONCLUSION: The results showed that the peak and initial positions of the hyoid and larynx and the pattern of hyoid movement varied significantly depending on the body postures. This study suggests that the LD posture was one of the safe feeding postures without any increased risk compared with UP posture.