RESUMO
As indicações de tratamento das fraturas mandibulares em paciente pediátrico variam em conservador, fixação não rígida e interna rígida. Alterações no crescimento ósseo, disfunções na articulação temporomandibular e assimetrias faciais podem ser decorrentes ao insucesso do tratamento. O objetivo deste trabalho consiste em relatar abordagem cirúrgica em fratura de sínfise e côndilo mandibular bilateral em paciente pediátrico. Paciente gênero feminino, 09 anos de idade, foi encaminhada ao Hospital Geral do Estado - Bahia vítima de queda de nível, cursando com trauma em face. Apresentou queixa principal, referida pela progenitora, de dificuldades em fechar a boca. Ao exame físico, a paciente apresentou mobilidade atípica à manipulação da mandíbula, mordida aberta anterior, equimose sublingual, ausência das unidades dentárias 74 e 75, com abertura bucal regular e suturas em posição em região de mento. Ao exame de imagem de tomografia computadorizada da face, pôde-se notar sinais sugestivos de fratura em região de sínfise e côndilos mandibulares bilateral. Após diagnóstico das fraturas, a paciente foi submetida à cirurgia sob anestesia geral para redução e fixação das mesmas. Realizou-se acessos em ferimento na região mentual e retromandibular bilateral com posterior síntese das fraturas utilizando fixação interna rígida com placas do sistema 2.0mm, associada a odontossíntese na fratura de sínfise. Ao acompanhamento periódico, a eleição do tratamento cirúrgico para fraturas mandibulares em pacientes pediátricos, pode permitir segurança no crescimento ósseo mandibular e facial(AU)
The indications for treatment of mandibular fractures in pediatric patients vary from conservative, non-rigid fixation and rigid internal fixation. Changes in bone growth, temporomandibular joint disorders and facial asymmetries may be due to treatment failure. The objective of this work is to report a surgical approach to bilateral symphysis and mandibular condyle fractures in a pediatric patient. Female patient, 9 years old, was sent to the State General Hospital - Bahia, victim of a fall in level, suffering from trauma to the face. She presented a main complaint, mentioned by her mother, of difficulties in closing her mouth. On physical examination, the patient presented atypical mobility when manipulating the jaw, anterior open bite, sublingual ecchymosis, absence of dental units 74 and 75, with regular mouth opening and sutures in position in the chin region. When examining the computed tomography image of the face, signs suggestive of fracture in the region of the symphysis and bilateral mandibular condyles were noted. After diagnosis of the fractures, the patient underwent surgery under general anesthesia to reduce and fix them. Access was performed on a wound in the mental and bilateral retromandibular region with subsequent synthesis of the fractures using rigid internal fixation with 2.0mm system plates, associated with odontosynthesis in the symphysis fracture. With periodic monitoring, the choice of surgical treatment for mandibular fractures in pediatric patients can allow for safe mandibular and facial bone growth(AU)
Assuntos
Humanos , Feminino , Criança , Fixação Interna de Fraturas , Queixo/cirurgia , Queixo/lesões , Côndilo Mandibular/cirurgia , Côndilo Mandibular/lesõesRESUMO
Introducción: el análisis detallado de las proporciones nasofaciales desempeña un papel fundamental para lograr la armonía facial e identificar desequilibrios; asi se dirige el tratamiento quirúrgico para lograr mejores resultados postoperatorios. El objetivo de este estudio fue determinar la prevalencia de pacientes sometidos a rinoplastia que requerían, además, un aumento del mentón. Materiales y métodos: se seleccionaron 100 pacientes voluntarios sometidos a rinoplastia entre los 17 y 55 años y se les realizó un estudio fotográfico preoperatorio. Se realizó un análisis facial del tercio inferior de la cara mediante tres métodos: González-Ulloa, Goode y Silver, y se hizo un análisis univariado y bivariado. Resultados: 100 pacientes voluntarios ingresaron al estudio; de estos, 7 fueron excluidos y quedaron 73 mujeres y 20 hombres; la edad mínima fue de 17 años y la máxima de 55 años, con un promedio de 28,4 años. La edad media de los hombres fue de 30,9 años y de las mujeres de 28,2 años. Del total de pacientes, 96,7 % de los pacientes cumplían con 2 o 3 métodos para aumento del mentón; de estos, 78,8 % eran mujeres y 21,1 % eran hombres. Conclusión: un análisis adecuado de las proporciones nasofaciales es fundamental para determinar los procedimientos necesarios para lograr un buen resultado quirúrgico y una mayor satisfacción del paciente. Estos métodos no sustituyen el juicio estético del cirujano; sin embargo, proporcionan un estándar objetivo para el diagnóstico de los desequilibrios faciales.
Introduction: Detailed analysis of nasofacial proportions plays a fundamental role in achieving facial harmony and identifying imbalances; thus, surgical treatment is directed to achieve better postoperative outcomes. The aim of this study was to determine the prevalence of patients undergoing rhinoplasty who also required chin augmentation. Materials and methods: 100 volunteer rhinoplasty patients between 17 and 55 years of age were selected and a preoperative photographic study was performed. Facial analysis of the lower third of the face was performed by three methods: Gonzalez-Ulloa, Goode and Silver, univariate and bivariate analysis was performed. Results: 100 voluntary patients entered the study, 7 of these were excluded, leaving 73 women and 20 men, the minimum age was 17 years and the maximum 55 years, with an average of 28.4 years. The mean age of the men was 30.9 years and of the women 28.2 years. Of the total number of patients, 96.7% of the patients com- plied with 2 or 3 methods for chin augmentation, of these 78.8% were women and 21.1% men. Conclusions: Adequate analysis of nasofacial proportions is essential to determine the procedures necessary to achieve a good surgical outcome and greater patient satisfaction. These methods do not replace the surgeon's aesthetic judgment; however, they provide an objective standard for the diagnosis of facial imbalances.
Assuntos
Humanos , Masculino , Feminino , Rinoplastia , Queixo , Cirurgia Plástica , MentoplastiaRESUMO
OBJECTIVES@#To investigate the effect of different soft-tissue morphologies on the treatment of skeletal class Ⅰ malocclusion patients by analyzing measurement data before and after treatment.@*METHODS@#Pre- and post-treatment lateral cephalograms of 55 adult female Angle class Ⅰ patients were collected in the Department of Orthodontics, Hospital of Stomatology, Jilin University from January 2012 to December 2020. Chin soft-tissue morphologies in the lateral cranial radiographs were used to divide the patients into an abnormal chin morphology group (flat and retracted chins, n=27) and a normal chin morphology group (rounded and prominent chins, n=28). Relevant soft- and hard-tissue indexes were selected to study in-group varieties and intergroup differences in the varying chin morphologies before and after treatment.@*RESULTS@#The chin-lip angle, mandibular chin angle, mandibular chin vertex angle, PP-MP, LL-E, UL-E, Po-Pos, and B-B' thickness in the abnormal chin morphology group were significantly higher than those in the normal chin morphology group (P<0.05). Furthermore, m∶BMe and n∶B'Mes in the abnormal chin morphology group were signi-ficantly lower than those in the normal chin morphology group (P<0.05). After treatment, the mandibular chin angle, mandibular chin vertex angle, U1-SN, L1-MP, LL-E, UL-E, SNA, SNB, and B-B' thickness of the abnormal chin morphology group significantly decreased (P<0.05), whereas the nasolabial angle, m∶BMe, n∶B' Mes, and Po-Pos significantly increased (P<0.05). In the normal chin morphology group, the U1-SN, L1-MP, LL-E, UL-E, and B-B' thicknesses decreased significantly (P<0.05), whereas the nasolabial angle significantly increased (P<0.05). Among them, m∶BMe and n∶B' Mes were positively correlated.@*CONCLUSIONS@#Chin morphology affects the formulation of treatment plans. Compared with the normal chin morphology group, the abnormal chin morphology group required a larger retraction of incisors. Although the chin of soft-tissue morphology is related to the morphology of bones, the changes in soft tissue chin after treatment cannot be directly predicted according to the bone changes. Soft-tissue chin morphology affects the aesthetic assessment of the soft-tissue lateral profile and the change in soft tissue before and after treatment. The method of predicting the change in soft-tissue chin after treatment should consider the morphology of the soft-tissue chin.
Assuntos
Adulto , Humanos , Feminino , Queixo , Lábio , Cefalometria/métodos , Estética Dentária , MandíbulaRESUMO
Aim: This study aimed to evaluate the correlation between vertical dimension of occlusion (VDO) and various facial measurements in a sample of Sudanese adults. Material and Methods: A total of 113 dental students (33 males and 80 females) with a mean age of 21.7±1.26 years were enrolled in this study. Different facial measurements including (Eye-Mouth, Eye-Eye, Eye-Ear, and Ear Height) were compared with two different measurements of VDO: N-Gn (from the tip of the nose to the tip of the chin), and Sn-Me (from the base of the nose to the bottom of the chin). Pearson's correlation coefficient test was utilized for the correlation between the measured parameters. A p-value of less than 0.05 was considered significant for all analyses. Results: A significant positive correlation was shown between all measured facial distances and both measured VDO distances. Though, the strongest correlation was seen for the eye-mouth distance (r= 0.725, p<0.001), while the weakest was for ear height (r= 0.254, p= 0.007). A paired t-test revealed a significant longer N-Gn distance than Sn-Me distance. Also, it has been shown that there were no significant differences between right and left sides of the face. Conclusion: The distance measured from the outer canthus of the eye to the angle of the mouth can be used to predict Subnasale-Menton (Sn-Me) distance.
Objetivo: Este estudio tuvo como objetivo evaluar la correlación entre dimensión vertical oclusal (DVO) y varias medidas faciales en una muestra de adultos sudaneses. Material y Métodos: Un total de 113 estudiantes de odontología (33 hombres y 80 mujeres) con una edad media de 21,7 ± 1,26 años se inscribieron en este estudio. Se compararon diferentes medidas faciales que incluyen (ojo- boca, ojo-ojo, ojo-oído y altura de la oreja) con dos medidas diferentes de DVO: N-Gn (desde la punta de la nariz hasta la punta del mentón) y Sn -Yo (desde la base de la nariz hasta la parte inferior del mentón). Se utilizó la prueba del coeficiente de correlación de Pearson para la correlación entre los parámetros medidos. Un valor de p inferior a 0,05 se consideró significativo para todos los análisis. Resultados: Se mostró una correlación positiva significativa entre todas las distancias faciales medidas y ambas distancias DVO medidas. Sin embargo, la correlación más fuerte se observó para la distancia ojo-boca (r=0,725, p<0,001), mientras que la más débil fue para la altura de las orejas (r=0,254, p=0,007). Una prueba de t pareada reveló una distancia N-Gn significativamente más larga que la distancia subnasal-mentón. Además, se ha demostrado que no hubo diferencias significativas entre los lados derecho e izquierdo de la cara. Conclusión: La distancia medida desde el canto externo del ojo hasta el ángulo de la boca puede utilizarse para predecir la distancia subnasal-mentón.
Assuntos
Humanos , Masculino , Feminino , Dimensão Vertical , Face/anatomia & histologia , Prostodontia , Sudão/epidemiologia , Antropometria , Nariz/anatomia & histologia , Queixo/anatomia & histologia , Oclusão Dentária , Olho/anatomia & histologia , Desenvolvimento Maxilofacial , Boca/anatomia & histologiaRESUMO
Objective: The surgical reconstruction strategy for scar contracture deformity in chin and neck was explored, aiming to obtain better aesthetic outcome. Methods: A retrospective observational study was conducted. From December 2017 to April 2021, 34 patients with scar contracture deformity in chin and neck after burns were hospitalized in the Department of Plastic Surgery of the First Affiliated Hospital of Army Medical University (the Third Military Medical University), aged 12-54 years, including 13 males and 21 females, 4 cases with chin affected only, 7 cases with neck affected only, and 23 cases with both chin and neck affected. The scar areas were 48-252 cm2. All the patients were treated by operation with expanded flaps, following the "MRIS" principle of matching of the color and thickness of the repair flaps (match), reconstructing of the aesthetic features of subunits (reconstruction), design of incision according to the plastic principle (incision), and prevention of the surgical incision scar (scar). The rectangular or kidney shaped skin and soft tissue expander (hereinafter referred to as the expander) with rated capacity of 80-400 mL was embedded in the first stage, which was routinely expanded to 3-5 times of the rated capacity of the expander. In the second stage, scar resection and expanded flap excision were performed to repair the secondary wound, and the flap donor site was sutured directly. The expansion ratio of the expander (with average value being calculated), the type of flaps used, the reconstruction of local aesthetic morphology, the appearance of postoperative incision, the survival of flap, and the situation of donor and recipient sites observed during follow-up were recorded. Results: Among the 34 patients, the average expansion ratio of the implanted expander was 3.82 times of the rated capacity of the expander. Three cases were repaired by the expanded local pedicled flap only, 19 cases by the expanded shoulder and/or chest perforator pedicled flap only, 10 cases by the expanded local pedicled flap combined with the expanded shoulder and/or chest perforator pedicled flap, and 2 cases by the expanded local pedicled flap combined with the expanded free flap of the second intercostal perforator of internal thoracic artery. After scar resection, the shapes of lower lip and chin-lip groove were reconstructed in 10 cases, chin process reconstruction and chin lengthening were performed in 16 cases, and the cervico-mental angle and mandibular margin contour were reconstructed in 28 cases. The surgical incision was concealed, most of which were located at the natural junction or turning point of the chin and neck subunits. The vertical incision of neck was Z-shaped or fishtail-shaped. All the expanded flaps in 34 patients survived after operation, of which 8 patients had minor necrosis at the edge or tip of the expanded flaps 1-3 days after operation and healed after dressing change. During the follow-up of 3-18 months, little difference in color and thickness between the expanded flap and the skin of chin and neck was observed, and the aesthetic shape of chin and neck was significantly improved, with mild scar hyperplasia of surgical incision. Conclusions: Reconstruction of scar contracture deformity in chin and neck by using expanded flaps based on the "MRIS" principle is beneficial to improve the quality of surgery and achieve better aesthetic outcome.
Assuntos
Feminino , Humanos , Masculino , Queixo/cirurgia , Cicatriz/cirurgia , Contratura/cirurgia , Retalhos de Tecido Biológico , Retalho Perfurante , Procedimentos de Cirurgia Plástica , Transplante de Pele , Ferida Cirúrgica , Resultado do TratamentoRESUMO
SUMMARY: The aim of this research was to evaluate the changes obtained with the mentoplasty technique in the increase of the airway imaging. A systemic review was performed using the parameters of the prism matrix, in the PubMed, Science Direct, Redalyc database, covering the years 1984 to 2019 with the use of defined inclusion criteria. The authors independently applied the selected parameter of data extraction, study selection and risk-to-bias assessment. A total of 1,251 articles were obtained among the 3 databases, of which 10 met the inclusion criteria. The variables studied were: type of research, sample size, sex, age, dento-skeletal diagnosis, airway classification, diagnosis of obstructive sleep apnea syndrome (OSAS), type of imaging evaluation, variables evaluated in the image, pre and post-operative values, surgical technique and type of fixation used, other surgical procedures applied, and complications. In the cases of linear evaluation with cephalometric analysis (9 articles) they used PAS (posterior airspace), MP-H (mandibular plane to the hyoid) and SNB (saddle-nasion-point B), and SCSA (section area as the most relevant points, smallest cross section) and VT (total volume) in the volumetric evaluations (2 articles). The average change in posterior airspace achieved by the cited authors is 4.2 mm with standard deviation of 1.4 mm with the use of advancement mentoplasty. The most widely used technique was mentoplasty with a horizontal osteotomy by 5 authors. Based on the research there is a positive relationship between the increase in the airway and the advancement mentoplasty procedure, however, more standardized studies associated with the way of measuring and evaluating the relationship between advancement and the airway are necessary.
RESUMEN: El objetivo de esta investigación fue evaluar los cambios obtenidos con la técnica de mentoplastia en el incremento de la via aérea. Una revisión sistemática fue realizada utilizando parámetros de la matriz prisma, en PubMed, Science Direct, Redalyc database, cubriendo los años 1984 a 2019 con criterios de inclusión definidos. Los autores aplicaron de forma independiente los parámetros de selección y extracción de datos, selección de estudios y riesgos de sesgo. Un total de 1251 artículos fueron obtenidos de las 3 bases de dato, donde 10 artículos cumplieron los criterios de inclusión. Las variables estudiadas fueron: tipo de investigación, tamaño de la muestra, genero, edad, diagnóstico dento esqueletal, clasificación de la vía aérea, diagnostico de síndrome de apnea del sueño (SAOS), tipo de evaluación de la imagen, variables evaluadas en la imagen en pre y postoperatorio, técnica quirúrgica y tipo de fijación utilizada, otros procedimientos quirúrgicos y complicaciones. En el caso de la evaluación linear con cefalometria (9 artículos), usaron PAS (posterior airspace), MP-H (plano mandibular hacia el hueso hioide) y SNB (silla turca-nasion- punto B) y SCSA (sección de puntos mas relevantes, menores transfversales) y el VT (volumen total) en las evaluaciones volumétricas (2 artículos). El promedio de cambio posterior de la vía aérea citado por autores fue de 4,2 mm con una desviación estándar de 1,4 mm con el uso de la mentoplastia de avance. La técnica mas habitual fue la mentoplastia con osteotomía horizontal (5 autores). Basados en esta investigación existe una relación positiva entre el incremento de la vía aérea y el avance con genioplastia; sin embargo, mas estudios estandarizados junto con medidas definidas y la evaluación correcta del avance y la vía área son necesarios.
Assuntos
Humanos , Faringe/anatomia & histologia , Queixo/anatomia & histologia , Mentoplastia , Avanço Mandibular , Mandíbula/anatomia & histologiaRESUMO
Difficulties in airway management turn out to be the leading cause of cardiac arrest in anesthesia and they represent 50% of severe non-fatal anesthesiological complications. The main obstacle lies in the difficulties to predict it. Difficult intubation occurs in 1.5 to 8% of general anesthesia procedures and it can be defined as one requiring more than three attempts at laryngoscopy or more than 10 minutes of laryngoscopy. In order to identify and prevent an adverse event in patients at risk of presenting a difficult intubation, several parameters have been investigated. Anatomical factors that can predict difficult direct laryngoscopy require a complete pre-anesthetic evaluation and physical examination by the anesthesiologist. These include: the Mallampati scale, the thyromental distance (of Patil), the sternomental distance, the mandibular protrusion test and the atlanto- occipital extension; which combined have a high positive predictive value to anticipate difficult airway management.
Las dificultades en el abordaje de la vía aérea resultan ser la primera causa de paro cardíaco en anestesia y, a su vez, representan al 50% de las complicaciones severas no fatales de causa anestesiológica. El principal obstáculo a superar radica en las dificultades para predecirla[]. La intubación dificultosa se define como la necesidad de tres o más intentos o el empleo de más de 10 minutos para lograr la intubación traqueal, situación que ocurre en 1,5 a 8% de los procedimientos de anestesia gene- ral[]. Con el fin de identificar pacientes con riesgo de presentar una intubación dificultosa, se han investigado diversos parámetros capaces de anticipar un evento adverso. La caracterización de factores anatómicos que puedan dificultar la laringoscopia directa y la consecuente intubación orotraqueal, requieren de un examen e interrogatorio completo y minucioso por parte del anestesiólogo. Entre estos factores anatómicos encontramos la escala de Mallampati, la distancia tiromentoniana (de Patil)[],[], la distancia esternomentoniana, el test de protrusión mandibular y la extensión atlantooccipital; que combinados tienen un alto valor predictivo positivo para anticipar una vía aérea dificultosa
Assuntos
Humanos , Feminino , Adulto , Glândula Tireoide/anatomia & histologia , Queixo/anatomia & histologia , Manuseio das Vias Aéreas , Preenchedores Dérmicos , Intubação Intratraqueal , Laringoscopia , Valor Preditivo dos Testes , Ácido HialurônicoRESUMO
Resumen Introducción: La sínfisis del mentón aporta equilibrio, simetría y armonía al rostro. Por ser una estructura anatómica mandibular muy importante y altamente modificable en cirugía estética, se considera indispensable conocer su morfología y así obtener una correcta interacción en el diagnóstico, pronóstico y terapéutica médico-odontológica. Objetivo: Determinar la morfología sínfisis del mentón en jóvenes adultos de la ciudad de Quito- Ecuador, año 2019, mediante la identificación de las longitudes sagitales y coronales. Metodología: Este estudio tuvo un enfoque cuantitativo, tipo descriptivo-observacional, con temporalidad retrospectiva. Se calibraron, analizaron y trazaron 384 radiografías digitales laterales de adultos jóvenes de la ciudad de Quito-Ecuador, año 2019 en el software AutoCAD-2019. Resultados: Existió una elevada frecuencia de la forma geométrica cuadrada (60%) con respecto a la rectangular (40%), adicionalmente se identificó que la figura cuadrada es más frecuente en individuos de sexo femenino y sujetos clase I (56%) y II (70%), además de todos los patrones de crecimiento vertical hipodivergentes (58%), normodivergentes (64%) e hiperdivergentes (57%). Conclusiones: La forma cuadrada de la sínfisis del mentón es mayor que la forma rectangular. Por la originalidad de los resultados, se sugiere realizar nuevos estudios que correlacionen la morfología mentoniana con las diferentes estructuras cráneo-maxilofaciales.
Abstract Introduction: The chin symphysis contributes to the balance, symmetry and harmony of the face. Since it is an important anatomical jaw structure and highly modifiable in aesthetic surgery, it is considered crucial to know its morphology and, thus, obtain a correct interaction in the diagnosis, prognosis and medical-dental therapy. Objective: To determine the symphysis morphology of the chin in young adults in the city of Quito, Ecuador, in the year 2019, through the identification of sagittal and coronal lengths. Methodology: This study had a quantitative approach, descriptive-observational type, with retrospective temporality. We calibrated, analyzed and plotted 384 lateral digital radiographs of young adults from the city of Quito-Ecuador, year 2019 in the software AutoCAD-2019. Results: There was a high frequency of the square geometric shape (60%) in comparison to the rectangular one (40%). Additionally, it was identified that the square figure is more frequent in female individuals and class I (56%) and II (70%) subjects, in addition to all the hypodivergent (58%), normodivergent (64%) and hyperdivergent (57%) vertical growth patterns. Conclusions: The square shape of the chin symphysis is larger than the rectangular shape. Due to the originality of the results, it is suggested to carry out new studies that correlate chin morphology with the different cranio-maxillofacial structures.
Assuntos
Humanos , Adolescente , Adulto , Queixo/anatomia & histologia , EquadorRESUMO
ABSTRACT Objectives: This study aimed to (I) assess the morphology of the symphysis and soft tissue chin associated with sex, age and sagittal/vertical skeletal patterns, and (II) identify the individual and combined contributions of these variables to different portions of the symphysis. Methods: This cross-sectional study included 195 lateral cephalometric radiographs from untreated adults. Alveolar, basal, and soft tissue of the symphysis were measured by an X/Y cranial base coordinate system, and divided in accordance to four predictor variables: sex, age, and sagittal/vertical skeletal patterns. Parametric tests were conducted for comparison and correlation purposes, while multiple regression analysis was performed to explore combined interactions. Results: Alveolar inclination is related to sagittal and vertical patterns, and both explained 71.4% of the variations. Alveolar thickness is weakly predicted and poorly influenced by age. Symphysis height was 10% higher in males, and associated with a vertical skeletal pattern and sex, and both explained 43.6% of variations. Basal symphyseal shows an individual thickness, is larger in males, and vertically short-positioned with age. Soft tissue chin is not necessarily related to the size of the underling skeletal pattern, and enlarges with age, even in adulthood. Conclusions: The symphysis and surrounding tissues are influenced by sex, age, and sagittal and vertical patterns, acting differently on the alveolar, basal and soft tissue portions. Sagittal and vertical skeletal patterns are the strongest association on alveolar symphysis inclination, whereas sex and age acts on the vertical symphysis position and soft tissues thickness.
RESUMO Introdução: O presente estudo objetivou: 1) avaliar a morfologia da sínfise mandibular e dos tecidos tegumentares do mento, associada ao sexo, idade, padrões sagital e vertical; e 2) identificar as contribuições dessas variáveis, individualmente ou combinadas, às diferentes regiões da sínfise. Métodos: Este estudo transversal incluiu 195 radiografias cefalométricas laterais de adultos não tratados ortodonticamente. Os tecidos alveolar, basal e mole da sínfise foram medidos por um sistema de coordenadas x, y e z da base do crânio e divididos de acordo com quatro variáveis preditoras: sexo, idade e padrões esqueléticos sagitais e verticais. Testes paramétricos foram conduzidos para fins de comparação e correlação, enquanto a análise de regressão múltipla foi realizada para explorar as interações combinadas. Resultados: A inclinação alveolar está relacionada aos padrões sagitais e verticais, e ambos explicaram 71,4% das variações. A espessura alveolar é fracamente prevista e pouco influenciada pela idade. A altura da sínfise foi 10% maior no sexo masculino e esteve associada ao padrão esquelético vertical e ao sexo, sendo que ambos explicaram 43,6% das variações. A sínfise basal mostra espessura individual, é maior no sexo masculino e verticalmente curta com a idade. O tecido mole do mento não está necessariamente relacionado ao tamanho do padrão esquelético subjacente e aumenta com a idade, mesmo na idade adulta. Conclusões: A sínfise e os tecidos circundantes são influenciados pelo sexo, idade e padrões sagitais e verticais, que atuam de forma diferenciada nas porções alveolar, basal e de tecidos tegumentares. Os padrões esqueléticos sagitais e verticais são a associação mais forte na inclinação da sínfise alveolar, enquanto o sexo e a idade atuam na posição vertical da sínfise e na espessura dos tecidos tegumentares.
Assuntos
Humanos , Masculino , Adulto , Mandíbula/diagnóstico por imagem , Radiografia , Cefalometria , Estudos Transversais , Queixo/anatomia & histologia , Queixo/diagnóstico por imagemRESUMO
Facial harmony is the consequence of a proper balance between all facial structures. The identification and classification of morphologic characteristics that detract from facial harmony is most effectively accomplished by clinical examination. The maintenance of the ratios between the facial thirds, correct spatial bone position and soft tissues accommodation are all factors that directly contribute in a balanced facial profile. The chin, likewise, contributes significantly in facial balance, mainly in the profile view. Expressive changes on chin position are associated with the perception of strong or delicate characters. Thus, over the years, a series of studies has been constructed focusing on mandibular osteotomies techniques that enable changes in chin position: advances, setback, extrusion, intrusion, widening, narrowing and asymmetry. This study aims to address historical and technical aspects of genioplasty; associating patient's condition with the surgical techniques that can be applied for correction of chin deformities.
La armonía facial es la consecuencia del balance entre las estructuras facial. La identificación y clasificación de las características morfológicas que están acompañando la armonía facial son mas efectivas al realizar un estudio de análisis facial. La obtención de promedios entre los tercios, corrección especial de la posición del hueso y la acomodación de los tejidos blandos son factores directamente involucrados en el balance del perfil. El mentón, contribuye significativamente en este balance. Cambios expresivos en la posición del mentón son asociados con la percepción de características fuertes o delicadas. Durante los años, una serie de estudios han sido desarrollados enfocándose en las osteotomías mandibulares y técnicas capaces de alcanzar los cambios en la posición del mentón: avances, retrocesos, extrusiones, ensanchamientos, estrechamientos y asimetrías. Este estudio pretende orientar las condiciones históricas y técnicas respecto de la genioplastia; la asociación de las características del paciente con la técnica quirúrgica pueden ser aplicadas para la corrección de las deformidades.
Assuntos
Humanos , Queixo/cirurgia , Mentoplastia/métodosRESUMO
O tratamento das deformidades faciais está também associada a correção da posição do mento. O emprego de diferentes formatos de mentoplastia tem por objetivo agregar um melhor contorno, preenchimento e simetria a região anterior da mandibula e adjacente ao mento, além de permitir alinhamento da sinfise nas três dimensões. Nessa nota técnica temos por objetivo apresentar uma modificação ao procedimento convencional, mentoplastia em forma de asa, bem como sua aplicabilidade e execução... (AU)
The treatment of facial deformities is also associated with correction of the chin position. The use of different genioplasty formats aims to add a better contour, filling and symmetry to the anterior region of the mandible and adjacent to the chin, in addition to allowing alignment of the symphysis in the three dimensions. In this technical note, we aim to present a modification to the conventional procedure, chin wing osteotomy, as well as its applicability and execution... (AU)
Assuntos
Humanos , Masculino , Adulto , Osteotomia , Procedimentos Cirúrgicos Ortognáticos , Cirurgia Ortognática , Mentoplastia , Anormalidades Congênitas , Terapêutica , Queixo , MandíbulaRESUMO
OBJECTIVE@#There is no universally accepted method for determining the ideal sagittal position of the maxilla in orthognathic surgery. The purpose of this study was to compare how well the Delaire's cephalometric analysis correlated with postoperatively findings in patients who underwent orthognathic surgery planned using other cephalometric analyses, as well as to evaluate the feasibility of the Delaire's cephalometric analysis in predicting the ideal sagittal position of the maxilla and chin.@*METHODS@#In the study, 35 patients with skeletal Class III malocclusion were involved and met the criteria. Treatment plans were developed using photographs, 3-D photographs, radiographs, and standard cephalometric measurements. The Delaire's cephalometric analysis data, like the phase measurements (∠C1-L1 and ∠C1-L2) of the sagittal positions of the maxillary and the chin separating the reference line (L1) of NP point and the reference line (L2) of Me point, were analyzed using Dolphin Imaging software. At the same time, the analyses on standard measurements were also performed. Four orthognathic doctors, 4 orthodontic doctors and 4 college students from non-medical majors were selected as aesthetic evaluators to assess the patients' profile aesthetic by visual analogue scale (VAS). The results through the Delaire's cephalometric analysis were statistically compared with that through standard methods.@*RESULTS@#The mean of ∠C1-L1 was 83.93°±2.99° and∠C1-L2 was 89.08° ±2.48° for males postoperatively, and 85.67° ±3.60° and 88.30° ±4.20° for females postoperatively. Compared with the reference values of Chinese goodlooking people, there was no significant difference of NP point, whereas there was a significant difference of Me point. The postoperative aesthetic scores were: the mean was 6.71±0.25 of upper jaws, 6.81±0.30 of chins and 6.90±0.29 of the overall for males; and 7.19±0.22, 7.26±0.34 and 7.39±0.29 for females. Compared with preoperative scores, there was a significant improvement. Furthermore, the scores of chins and the overall scores were related to the sagittal position of the chins.@*CONCLUSION@#Compared with standard cephalometric analysis, the Deliare's cephalometric analysis well unravel the preoperative deformity and the final esthetic sagittal positions of maxillary and chin in the present sample, and could be a useful tool for the planning of surgery-first approach in orthognathic surgery.
Assuntos
Feminino , Humanos , Masculino , Cefalometria , Queixo , Estudos de Viabilidade , Mandíbula , Maxila , Cirurgia Ortognática , Procedimentos Cirúrgicos OrtognáticosRESUMO
El 81,3% de una encuesta realizada a 96 ortodoncistas y ortopedistas calificados y técnicos radiólogos consultados informan que ubican la cabeza del paciente en una posición ideal, subjetiva del profesional instruido que lo asiste, ya que muchas de sus fotografías y telerradiografías no son posiciones naturales de la cabeza genuinas. Se ha utilizado la vertical verdadera como parámetro para mediciones, todas angulares, para definir la disposición ánteroposterior del punto A´ (de construcción) para el cuerpo del labio superior, el punto Pg´para el mentón, el Labrale superior y el Labrale inferior para el bermellón de cada labio, con la finalidad de planificar correcciones ortopédicas, ortodóncicas u ortodóncicas-quirúrgicas de acuerdo a la anomalía detectada (AU)
Assuntos
Humanos , Masculino , Feminino , Postura/fisiologia , Cefalometria/métodos , Cabeça , Ortopedia/métodos , Valores de Referência , Antropometria/métodos , Inquéritos Epidemiológicos , Queixo/anatomia & histologia , Fotografia Dentária , Lábio/anatomia & histologia , Má Oclusão/terapia , Má Oclusão/diagnóstico por imagemRESUMO
Introdução: Identificar qual projeção do mento é ideal para compor um rosto harmônico, de acordo com a opinião de leigos e cirurgiões buco-maxilo-faciais (BMF), relacionando as variáveis: sexo, etnia(raça) e região de origem(local). Metodologia: Participaram do estudo 386 leigos e 198 cirurgiões BMF. Este estudo foi realizado por meio de um formulário que continha dezoito imagens da face com diferentes projeções do mento: nove do sexo masculino e nove do sexo feminino, tendo o público escolhido a imagem que mais o agradou. Resultados: Em relação à avaliação da imagem masculina, as categorias: grupo(leigos/cirurgiões), sexo masculino e feminino, regiões (Nordeste e Sudeste) e raça, os entrevistados leigos escolheram um mento retraído em relação à linha vertical verdadeira, semelhante à escolha dos cirurgiões. Em relação à imagem feminina, para as mesmas categorias do sexo masculino, as projeções protruídas de mento foram mais escolhidas, tanto para os leigos como para os cirurgiões. Entretanto, as subcategorias leigos da região Sudeste, leigos de raça branca e leigos do sexo masculino escolheram uma imagem feminina com projeções de mento mais retraída. Conclusões: A harmonia facial pode ser considerada subjetiva, pois engloba padrões pessoais de beleza; assim, os cirurgiões devem estar atentos às peculiaridades dos pacientes... (AU)
Introduction: To identify which projection of the chin is ideal for compose a harmonic face according to the opinion of laypeople and oral maxillofacial surgeons, relating the variables: gender, ethnicity (race) and region of origin (local). Methodology: 386 lay people and 198 surgeons participated in the study. This study was carried out by means of a form. This form contained eighteen images of faces with different projections of the chin: nine males and nine females. So, the audience chose the image that most pleased them. Results: In relation to the evaluation of the male image. The categories: group (laymen/ surgeons), male and female, regions (northeast and southeast) and race, lay interviewee chose a retracted chin in relation to the true vertical line, similar to the surgeons' choice. In relation to the female image, for the same male categories, the protruding projections of the chin were more chosen, both for the laymen and for the surgeons. However, for the lay subcategories of the Southeast region, white laymen and male laymen, both chose a female image with more retracted chin projections. Conclusions: The facial harmony can be considered subjective since it includes personal standards of beauty, so surgeons must be attentive to the peculiarities of the patients... (AU)
Assuntos
Humanos , Masculino , Feminino , Queixo , Estética Dentária , Face , Cirurgia Ortognática , Cirurgiões Bucomaxilofaciais , Imagem Corporal , EstéticaRESUMO
ABSTRACT Objective: The present study aims at using cone beam computed tomography (CBCT) to analyze the maxillomandibular characteristics present in adults with mandibular asymmetries and different sagittal jaw relationships. Methods: 360 patients were selected and divided into three groups (Class I, Class II, and Class III), with 120 individuals per group. The groups were then subdivided according to the intensity of lateral deviation of the gnathion point, into: 1) relative symmetry, 2) moderate asymmetry, and 3) severe asymmetry. Three planes of reference were established in the CBCT images and several measurements were taken to compare the bilateral skeletal differences between the intensities of asymmetry for the different sagittal jaw relationships. Results: When the groups were compared by the intensity of asymmetry, significant differences among patients with relative symmetry and moderate to severe asymmetry were found. This was especially noticed for severe asymmetry, suggesting that the deviation of the chin did not constitute the only morphological alteration for these patients, especially because a series of measurements showed significant bilateral differences. When comparing sagittal jaw relationships, the only significant finding was the vertical positioning of the gonion between Class II and III patients with severe asymmetry. Conclusions: When comparing the three sagittal jaw relationships with the same intensity of asymmetry, most maxillofacial aspects were quite similar. The only difference was found for patients with severe asymmetry, as the individuals with Class II showed greater bilateral difference in the vertical positioning of the gonion, when compared to patients with Class III.
RESUMO Objetivo: o presente estudo teve como objetivo analisar, por meio de tomografia computadorizada de feixe cônico (TCFC), as características esqueléticas maxilomandibulares presentes em adultos com diferentes graus de assimetria mandibular e diferentes relações esqueléticas sagitais. Métodos: foram selecionados 360 pacientes, os quais foram divididos em três grupos, com 120 indivíduos cada (Classe I, Classe II e Classe III). Cada grupo foi, ainda, subdividido de acordo com a intensidade do desvio lateral do mento: 1) simetria relativa; 2) assimetria moderada; e 3) assimetria severa. Três planos de referência foram estabelecidos nas imagens de TCFC e várias medidas foram realizadas, sendo comparadas as diferenças esqueléticas bilaterais existentes entre os graus de assimetria em cada grupo, nas diferentes relações esqueléticas sagitais. Resultados: quando comparados os grupos pelos graus de assimetria, existiram diferenças significativas entre pacientes com simetria relativa e pacientes assimétricos, especialmente para a assimetria severa, sugerindo que o desvio do mento não constitui a única alteração morfológica para esses pacientes, especialmente porque uma série de medidas apresentou diferenças bilaterais significativas. Quando comparadas as relações sagitais entre si, não foram encontradas diferenças significativas, exceto para o posicionamento vertical do gônio entre as Classe II e III na assimetria severa. Conclusão: ao comparar a mesma intensidade de assimetria entre as diferentes relações esqueléticas sagitais, pouca diferença pôde ser observada. A única diferença encontrada foi em pacientes com assimetria severa, na qual os indivíduos com Classe II apresentaram maior diferença bilateral no posicionamento vertical do gônio, quando comparados àqueles com Classe III.
Assuntos
Humanos , Adulto , Tomografia Computadorizada de Feixe Cônico , Má Oclusão Classe III de Angle , Cefalometria , Queixo , Assimetria Facial , Cabeça , MandíbulaRESUMO
Vertical facial growth triggers the rotation of mandible to move the chin point to the downward and backward direction, which showed remarkably effective result making the less prominent chin. Recently, the intraoral removable appliance utilizing class III elastic demonstrated the vertical growth trigger mechanism. The treatment change was very fast and wearing was quite easy, compared to extraoral appliances.The purpose of this study was to verify the duration of the treatment on class III malocclusion using intraoral removable appliances, which designed to accelerate vertical facial growth.56 patients were selected with the complaint of the protruded mandible and class III malocclusion (overjet : −3 – 0 mm, overbite : 0 – 4 mm). Information like; age at start, duration of the treatment events, type of the treatment, overjet, overbite etc. was collected and calculated.The average age of the patients delivering the initial brace was 8.75 ± 1.10 year. Most of the anterior crossbite was resolved within 6 months. The total treatment period was 21.79 ± 10.73 months with the additional procedures like the alignment of anterior teeth and torque control using additional removable and fixed orthodontic appliances. The correlation study showed that patient's cooperation (p = 0.000) and the use of fixed appliance (p = 0.032) were significantly influenced on treatment duration.
Assuntos
Humanos , Braquetes , Queixo , Má Oclusão , Mandíbula , Aparelhos Ortodônticos , Sobremordida , Estatística como Assunto , Dente , TorqueRESUMO
Post-traumatic hematoma formation is a common complication of contusion. If the hematoma is large enough to aspirate or drain, it can be treated quickly and appropriately. However, if the hematoma is small or concealed by local swelling, it may be overlooked and left untreated. In most cases, a hematoma will resolve following conservative treatment; however, associated infection or muscle fibrosis can occur. Herein, we present the case of a patient with a chin deformity caused by a post-traumatic hematoma. The deformity was treated using botulinum toxin and triamcinolone acetonide injections as minimally invasive treatments. The course of treatment was good.
Assuntos
Humanos , Toxinas Botulínicas , Queixo , Anormalidades Congênitas , Contusões , Assimetria Facial , Fibrose , Hematoma , Triancinolona AcetonidaRESUMO
SHORT syndrome is an extremely rare congenital condition due to a chromosomal mutation of the PIK3R1 gene found at 5q13.1. SHORT is a mnemonic representing six manifestations of the syndrome: (S) short stature, (H) hyperextensibility of joints and/or inguinal hernia, (O) ocular depression, (R) Rieger anomaly, and (T) teething delay. Other key aspects of this syndrome not found in the mnemonic include lipodystrophy, triangular face with dimpled chin (progeroid facies, commonly referred to as facial gestalt), hearing loss, vision loss, insulin resistance, and intrauterine growth restriction (IUGR). 3q duplication syndrome is rare syndrome that occurs due to a gain of function mutation found at 3q25.31-33 that presents with a wide array of manifestations including internal organ defects, genitourinary malformations, hand and foot deformities, and mental disability. We present a case of a 2 year and 3 month old male with SHORT syndrome and concurrent 3q duplication syndrome. The patient presented at birth with many of the common manifestations of SHORT syndrome such as bossing of frontal bone of skull, triangular shaped face, lipodystrophy, micrognathia, sunken eyes, and thin, wrinkled skin (progeroid appearance). Additionally, he presented with findings associated with 3q duplication syndrome such as cleft palate and cryptorchidism. Although there is no specific treatment for these conditions, pediatricians should focus on referring patients to various specialists in order to treat each individual manifestation.
Assuntos
Humanos , Masculino , Queixo , Fissura Palatina , Criptorquidismo , Depressão , Fácies , Retardo do Crescimento Fetal , Deformidades do Pé , Osso Frontal , Mãos , Perda Auditiva , Hérnia Inguinal , Resistência à Insulina , Articulações , Lipodistrofia , Micrognatismo , Parto , Pele , Crânio , Especialização , Dente , Erupção DentáriaRESUMO
Necrobiotic xanthogranulomatous reaction is a multiorgan, non-Langerhans cell histiocytosis with an unknown etiology. Occurrence in the salivary gland is extremely rare. We recently identified a case of necrobiotic xanthogranulomatous sialadenitis in a 73-year-old Korean woman who presented with a painless palpable lesion in the chin. There was no accompanying cutaneous lesion. Partial resection and subsequent wide excision with neck dissection were performed. Pathological examination showed a severe inflammatory lesion that included foamy macrophages centrally admixed with neutrophils, eosinophils, lymphocytes, plasma cells, and scattered giant cells, as well as necrobiosis. During the 12-month postoperative period, no grossly remarkable change in size was noted. Necrobiotic xanthogranulomatous inflammation may be preceded by or combined with hematologic malignancy. Although rare, clinicians and radiologists should be aware that an adhesive necrobiotic xanthogranuloma in the salivary gland may present with a mass-like lesion. Further evaluation for hematologic disease and close follow-up are needed when a pathologic diagnosis is made.
Assuntos
Idoso , Feminino , Humanos , Adesivos , Queixo , Diagnóstico , Eosinófilos , Seguimentos , Células Gigantes , Doenças Hematológicas , Neoplasias Hematológicas , Histiocitose , Inflamação , Linfócitos , Macrófagos , Esvaziamento Cervical , Transtornos Necrobióticos , Xantogranuloma Necrobiótico , Neutrófilos , Plasmócitos , Período Pós-Operatório , Glândulas Salivares , Sialadenite , Pele , Glândula SubmandibularRESUMO
OBJECTIVE: The purpose of this study was to investigate the influence of heritability on the craniofacial soft tissue cephalometric characteristics of monozygotic (MZ) twins, dizygotic (DZ) twins, and their siblings (SIB). METHODS: The samples comprised Korean adult twins and their siblings (mean age, 39.8 years; MZ group, n = 36 pairs; DZ group, n = 13 pairs of the same gender; and SIB group, n = 26 pairs of the same gender). Thirty cephalometric variables were measured to characterize facial profile, facial height, soft-tissue thickness, and projection of nose and lip. Falconer's method was used to calculate heritability (low heritability, h2 0.9). After principal components analysis (PCA) was performed to extract the models, we calculated the intraclass correlation coefficient (ICC) value and heritability of each component. RESULTS: The MZ group exhibited higher ICC values for all cephalometric variables than DZ and SIB groups. Among cephalometric variables, the highest h2 (MZ-DZ) and h2 (MZ-SIB) values were observed for the nasolabial angle (NLA, 1.544 and 2.036), chin angle (1.342 and 1.112), soft tissue chin thickness (2.872 and 1.226), and upper lip thickness ratio (1.592 and 1.026). PCA derived eight components with 84.5% of a cumulative explanation. The components that exhibited higher values of h2 (MZ-DZ) and h2 (MZ-SIB) were PCA2, which includes facial convexity, NLA, and nose projection (1.026 and 0.972), and PCA7, which includes chin angle and soft tissue chin thickness (2.107 and 1.169). CONCLUSIONS: The nose and soft tissue chin were more influenced by genetic factors than other soft tissues.