Tratamento de fratura órbito-zigomática decorrente de acidente com projétil de bala de borracha / Treatment of orbito-zygomatic fracture due to accident with rubber bullet project / Tratamiento de fractura orbito-cigomática por accidente com proyecto bala de goma

Objetivo: Relatar um caso clínico de um paciente com fratura zigomático orbitária vítima de tiro de bala de borracha e mostrar a importância de um planejamento adequado. Relato de caso: Paciente do sexo masculino, 19 anos de idade, deu entrada no Hospital de Urgências de Teresina, relatando ter sofrido uma agressão por bala de borracha durante uma manifestação. Foi observado no exame clínico: aumento de volume, equimose palpebral superior e dificuldade de abertura bucal. Na imagem foi observado, projétil de borracha na região zigomática esquerda, fraturas de zigoma com comunicação na região de pilar zigomático, fratura com deslocamento na região de margem Infraorbital e fratura na sutura fronto-zigomática. Foi proposto para o caso clínico, cirurgia sob anestesia geral com acesso intrabucal para fixação do pilar zigomático com placa do sistema 2.0mm, acesso superciliar para fixação da sutura fronto-zigomática com placa 1.5mm, e reconstrução do assoalho orbitário com malha de titânio. Conclusão: No pós-operatório o paciente não apresenta relato de enoftalmia, distopia ou diplopia, ausência de dor e déficits visuais.

Objective: To report a clinical case of a patient with zygomatic-orbital fracture, victim of rubber bullet shooting and show the importance of an adequate planning. Case Report: A 19-year-old male patient was admitted to the Teresina Emergency Hospital, reporting having suffered an aggression by rubber bullet during a demonstration. On clinical examination was observed: increased volume, upper eyelid ecchymosis and difficulty opening the mouth. In the image it was observed, rubber bullet in the left zygomatic region, zygoma fractures with communicationin the region of the zygomatic pillar, fracture with displacement in the region of infraorbital margin and fracture in the fronto-zygomatic suture. It was proposed for the clinical case, surgery under general anesthesia with intraoral access for fixation of the zygomatic pillar with a 2.0 mm plate, superciliary access for fixation of the fronto-zygomatic suture with a 1.5 mm plate, and reconstruction of the orbital floor with titanium mesh. Conclusion: Postoperatively, the patient did not report enophthalmia, dystopia or diplopia, absence of pain and visual deficits.

Objetivo: Informar de un caso clínico de un paciente confractura zigomática-orbital víctima de un disparo de bala de goma y mostrar la importancia de una planificación adecuada. Reporte de caso: Paciente masculino, de 19 años, fue admitido enel Hospital de Urgencias de Teresina, informando haber sufrido una agresión por bala de goma durante una manifestación. Se observó en elexamen clínico: aumento de volumen, equimosis del párpado superior y dificultad para abrir la boca. En la imagen se observó, bala de goma en la región cigomática izquierda, fractura del cigoma con comunicación en la región del pilar cigomático, fractura con desplazamiento en la región del margen infraorbitario y fractura en la sutura fronto-cigomática. Se propuso para el caso clínico, cirugía bajo anestesia general conacceso intraoral para fijacióndel pilar cigomáticocon sistema de placas de 2,0 mm, acceso superciliar para fijación de la sutura fronto-cigomática de placas de 1,5 mm, y reconstrucción del suelo orbitario con malla de titanio. Conclusión: En el post operatorio, la paciente no presentó informes de enoftalmia, distopía o diplopía, ausencia de dolor y déficit visual.

A Clinical and Anatomical Study on the Localization of the Temporal Branch of the Facial Nerve Crossing the Zygomatic Arch / Estudio Clínico y Anatómico sobre la Localización del Ramo Temporal del Nervio Facial que Cruza el Arco Cigomático

SUMMARY: To clarify the path of the temporal branch of facial nerve (TB) crossing the zygomatic arch (ZA). Eighteen fresh adult heads specimens were carefully dissected in the zygomatic region, with the location of TB as well as its number documented. The hierarchical relationship between the temporal branch and the soft tissue in this region was observed on 64 P45 plastinated slices. 1. TB crosses the ZA as type I (21.8 %), type II (50.0 %,), and type III (28.1 %) twigs. 2. At the level of the superior edge of the ZA, the average distance between the anterior trunk of TB and the anterior part of the auricle is 36.36±6.56 mm, for the posterior trunk is 25.59±5.29 mm. At the level of the inferior edge of the ZA, the average distance between the anterior trunk of TB and the anterior part of the auricle is 25.77±6.19 mm, for the posterior trunk is 19.16±4.71 mm. 3. The average length of ZA is 62.06±5.36 mm. TB crosses the inferior edge of the ZA at an average of 14.67±6.45 mm. TB crosses the superior edge of the ZA at an average of 9.08±4.54 mm. 4. At the level of the ZA, TB passes on the surface of the pericranium while below the SMAS. The TB obliquely crosses the middle 1/3 part of the superior margin of the ZA and the junction of the middle 1/3 part and the posterior 1/3 part of the inferior margin of the ZA below the SMAS while beyond the periosteum. It is suggested that this area should be avoided in clinical operation to avoid the injury of TB.

El objetivo de estudio fue esclarecer el trayecto del ramo temporal del nervio facial (RT) que cruza el arco cigomático (AC). Se disecaron la región cigomática de 18 especímenes de cabezas sin fijar de individuos adultas y se documentó la ubicación del RT y su número de ramos. La relación jerárquica entre el ramo temporal y el tejido blando en esta región se observó en 64 cortes plastinados o P45. 1º El RT cruza el AC como tipo I (21,8 %), tipo II (50,0 %) y tipo III (28,1 %). 2º A nivel del margen superior del AC, la distancia promedio entre el tronco anterior de RT y la parte anterior de la aurícula fue de 36,36±6,56 mm, para el tronco posterior fue de 25,59±5,29 mm. A nivel del margen inferior del AC, la distancia promedio entre el tronco anterior del RT y la parte anterior de la aurícula era de 25,77±6,19 mm, para el tronco posterior era de 19,16±4,71 mm. 3º La longitud media de RT fue de 62,06±5,36 mm. EL RT cruzaba el margen inferior del AC a una distancia media de 14,67±6,45 mm. El RT cruzaba el margen superior del AC a una distancia media de 9,08±4,54 mm. 4º Anivel del AC, el RT pasaba por la superficie del pericráneo mientras se encuentra por debajo del SMAS. El RT cruza oblicuamente el tercio medio del margen superior del AC y la unión del tercio medio y el tercio posterior del margen inferior del AC por debajo del SMAS, más allá del periostio. Se sugiere que esta área debe evitarse en la operación clínica para evitar la lesión de la RT.

The use of zygomatic implants in severe maxillary atrophy: a systematic and meta-analysis review of randomised clinical trials / El uso de implantes zigomáticos para atrofia maxilar severa: una revisión sistemática y meta-análisis de ensayos clínicos aleatorizados

SUMMARY: Conventional implant treatment cannot always be used to rehabilitate edentulous patients with advanced maxillary atrophic. Zygomatic dental implants have been used over the past 20 years as an alternative treatment solution to bone grafting. The purpose of this meta-analysis is to evaluate the implant and prosthetic survival rate in non-oncologic patients with a severely atrophic maxilla. This review also aims to better understand the rate of peri-operative complications in this cohort of patients. A multi-database (PubMed, MEDLINE, EMBASE, and CINAHAL) focused systematic search was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations. Any randomised control trials studies involving human participants treated with zygomatic osseous implants were included. After eliminating duplicates, a total of 4 studies met the inclusion criteria for this meta-analysis review. With all the studies included there was a total of 174 patients treated with zygomatic osseous implants. The overall implant success rate was 98.03 %. The prosthetic success rate was 96.4 %. The most frequent peri-operative complication was sinusitis. Based on the limited data available in literature, zygomatic dental implants represent a valid alternative to bone augmenting procedure. However, they are not without risks and longer follow-ups are required to confirm the validity of the treatment in long term.

Los tratamientos convencionales con implantes no siempre pueden ser usados para rehabilitar pacientes edentulos con atrofia maxilar avanzada. Los implantes dentales zigomáticos son usados por los pasados 20 años como alternativa de tratamiento a las reconstrucciones óseas. El objetivo de este meta-análisis es evaluar la sobrevida de implantes y prótesis en pacientes no oncológicos con maxila severamente atrófica. Esta revisión también pretende entender al promedio de complicaciones peri operatorias en esta cohorte de pacientes. Una búsqueda sistemática en bases de datos múltiples (PubMed, MEDLINE, EMBASE y CINAHAL) fue desarrollada de acuerdo a recomendaciones de Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Cualquier estudio clínico aleatorizado de participantes humanos donde se utilizaron los implantes zigomáticos fueron incluidos. Después de eliminar duplicados, un total de 4 estudios cumplieron los criterios de inclusión para esta meta análisis. Con todos los estudios incluidos se obtuvieron 174 pacientes tratados con implantes zigomáticos. El promedio de éxito fue de 98,03 %. El promedio de éxito de la rehabilitación fue de 96,4 %. La complicación mas frecuente fue la sinusitis. Basados en los datos limitados en la literatura, los implantes zigomáticos representan una alternativa valida a los procedimientos de aumento óseo. Sin embargo, estos no están libres de riesgos y seguimientos de mayores periodos son necesarios para confirmar la validez de los tratamientos en el largo plazo.

Effectiveness of temporal island flap pedicled with perforating branch of zygomatic orbital artery to repair the defects after periocular malignant tumor resection / 中国修复重建外科杂志

OBJECTIVE@#To summarize the effectiveness of the temporal island flap pedicled with the perforating branch of zygomatic orbital artery for repairing defects after periocular malignant tumor resection.@*METHODS@#Between January 2015 and December 2020, 15 patients with periocular malignant tumors were treated. There were 5 males and 10 females with an average age of 62 years (range, 40-75 years). There were 12 cases of basal cell carcinoma and 3 cases of squamous carcinoma. The disease duration ranged from 5 months to 10 years (median, 2 years). The size of tumors ranged from 1.0 cm×0.8 cm to 2.5 cm×1.5 cm, without tarsal plate invasion. After extensive resection of the tumors, the left defects in size of 2.0 cm×1.5 cm to 3.5 cm×2.0 cm were repaired with the temporal island flap pedicled with the perforating branch of zygomatic orbital artery via subcutaneous tunnel. The size of the flaps ranged from 3.0 cm×1.5 cm to 5.0 cm×2.0 cm. The donor sites were separated subcutaneously and sutured directly.@*RESULTS@#All flaps survived after operation and the wounds healed by first intention. The incisions at donor sites healed by first intention. All patients were followed up 6-24 months (median, 11 months). The flaps were not obviously bloated, the texture and color were basically the same as the surrounding normal skin, and the scars at recipient sites were not obviously. There was no complication such as ptosis, ectropion, or incomplete closure of the eyelids and recurrence of tumor during follow-up.@*CONCLUSION@#The temporal island flap pedicled with the perforating branch of zygomatic orbital artery can repair the defects after periorbital malignant tumors resection and has the advantages of reliable blood supply, flexible design, and good morphology and function.

Facial shaping filled with autologous high density fat in zygomatic arch area / 中华医学美学美容杂志

Objective:To explore a simple and effective method to improve the facial shape coordination for patients.Methods:From May 2015 to May 2020, 36 female patients (aged 24-32 years, mean 26.8 years) who were required to change face shape were enrolled in Zhengzhou Mylike Medical Cosmetology Hospital to improve face shape by adjusting frontaI arch width combined with autologous high-density fat transplantation.Results:Thirty-three patients (91.7%) were satisfied (31 satisfied, 2 basically satisfied). Three patients were not satisfied with the filling effect, and two of them were satisfied after the second filling (3 months after operation). 35 of the 36 patients were satisfied, accounting for 97.2%, only 1 case was dissatisfied. No other compIications such as fat liquefaction were observed. The mean morphological surface index of patients was 90.2 before operation and 88.1 after operation, showing significant improvement.Conclusions:Autologous high density fat transplantation is a good method to adjust the coordination of the frontal arch.

Digital measurement of anatomical morphology of a zygomatic arch / 中华医学美学美容杂志

Objective:To analyze the anatomical morphology of the zygomatic arch for reduction malarplasty.Methods:Computed tomography (CT) data were obtained from the electronic records of 45 patients in the Tianjin Stomatological Hospital from January 2018 to February 2020. Among them, there were 30 patients with normal protrusion of zygoma (group A) and 15 patients with prominent protrusion of zygoma (group B). The data were imported into modeling and analysis software (Mimics). Left and right three-dimensional (3D) zygoma models were created through standard procedures. In the 3D models, a vertical cut of the zygomatic arch was done, and anatomical morphological characteristics of the zygomatic arch were obtained through bone data measurement and morphological observation. Mean values with 95% confidence intervals ( CI) were calculated for the positional data. Independent sample T-test was conducted on the positional data and anatomical morphology data of the zygomatic arch in the two groups. P< 0.05 was considered as statistically significant. Results:In group B, the anterior edge of the stabilization area was located in front of the articular tubercle point (15.12 mm, 17.16 mm). The posterior edge of the stabilization area was located in front of the articular tubercle point (7.11 mm, 8.24 mm). The posterior edge of the enlarged area was located in front of the articular tubercle point (3.17 mm, 3.94 mm). There were significant differences between group A and group B in the posterior edge of the stabilization area ( t= 2.41, P= 0.018), the posterior edge of the enlarged area ( t=2.58, P= 0.012), and the width of the unilateral face ( P<0.01). Conclusions:There exists a stabilization area of bone morphology and enlargement area in zygomatic arch. The anatomical morphology of the zygomatic arch is different in width of the unilateral face and location of the enlarged area between populations with normal protrusion and prominent protrusion of the zygoma.

Actinomycotic osteomyelitis in the maxilla and the zygomatic bone: a case report and literature review / 口腔疾病防治

Objective@# To investigate the clinical features, diagnosis and treatment of osteomyelitis of the jaw caused by an actinomycotic infection and to provide a reference for clinical diagnosis and treatment.@*Methods@#A case of osteomyelitis in the bilateral maxilla and the left zygomatic bone and arch caused by a mixed bacterial infection dominated by Actinomycetes was reviewed and analyzed in combination with the literature. @*Results @#The patient had left upper posterior tooth pain with repeated left facial swelling for 7 months. The patient's left face was swollen before surgery, the left maxillary alveolar bone was necrotic, and the upper palate showed fistula discharge. A maxillofacial magnetic resonance imaging scan excluded tumors and other space-occupying lesions. According to CBCT images, the initial diagnoses were left infraorbital space infection and osteomyelitis of the bilateral maxillary, the left zygomatic bone, the left zygomatic arch and the lateral orbital wall. Necrosis of the left maxilla and the zygomatic bone was excised, the focus was cleared and the focal tooth was extracted under general anesthesia. Histopathological results confirmed osteomyelitis and actinomycotic infection. Anti-inflammatory therapy with penicillin sodium was given before surgery, and piperacillin sodium and tazobactam sodium, dexamethasone sodium phosphate, tranexamic acid and mecobalamine were given after surgery. The patients' 6-month follow-up results showed that the maxillofacial shape was basically symmetrical; no ulceration, pus or abnormal secretion was found in the skin or intraoral mucosa; and the surgical area showed good recovery. A review of the relevant literature showed that Actinomyces is an opportunistic pathogen, and factors such as trauma and dental infection have been implicated in the pathogenesis of osteomyelitis. In addition to surgery, antibiotics are used to treat the disease and multidisciplinary symptomatic treatment combined with supportive treatment is required to achieve a better prognostic effect. @*Conclusion @# Actinomycotic osteomyelitis occurring in the maxilla and the zygomatic bone is an extremely rare disease that can be diagnosed by clinical manifestations, bacteriological examination and biopsy. Appropriate and effective penicillin drugs should be given at the initial stage of treatment, more sensitive antibiotics should be selected according to the results of the drug sensitivity test, and the lesions should be surgically removed when the patient's condition improves. Active symptomatic and supportive treatment should be performed during the treatment period.

Alcohol consumption and maxillofacial fractures in times of Covid-19: a cross-sectional study in a cuban university hospital / Consumo de alcohol y fracturas maxilofaciales en tiempos de Covid-19: un estudio transversal en un hospital universitario cubano

Introduction: The consumption of alcoholic beverages reduces the body's ability to deal with dangerous situations and exposes people to trauma. Objective: To determine the association between the consumption of alcoholic beverages and the characteristics of maxillofacial fractures treated at a Cuban university hospital in the context of COVID-19. Material and Methods: An observational, analytical, and cross-sectional study was carried out in the Maxillofacial Surgery unit at the "Carlos Manuel de Céspedes" General University Hospital during the year 2020. Prevalence ratios, 95% confidence intervals and p-values were obtained using generalized linear models. Results: In 58.23% of the cases, fractures were related to the consumption of alcoholic beverages. The fundamental etiology was interpersonal violence (47.75%), regardless of the consumption of alcoholic beverages. There was a prevalence of patients with nasal fractures (n=98; 55.06%), among which, 35.71% had consumed alcoholic beverages at the time of the trauma. Being male (p=0.005), the lack of university studies (p=0.007), the need for surgical treatment (p<0.001), the fractures of the zygomaticomaxillary complex (p=0.023), and the traumas that occurred during the weekends (p<0.001) or during the month of June (p=0.029) were factors associated with a higher frequency of fractures related to the consumption of alcoholic beverages. There was a lower frequency of fractures associated with alcohol consumption during the months of January (p=0.006) and March (p=0.001). Conclusion: Six out of ten cases were under the influence of alcoholic beverages. There was a greater number of young and male patients, mainly due to interpersonal violence.

Introducción: La ingestión de bebidas alcohólicas disminuye la capacidad del organismo para enfrentar situaciones de peligro y lo predispone a sufrir traumatismos diversos. Objetivo: Determinar la asociación entre el consumo de bebidas alcohólicas y las características de las fracturas maxilofaciales atendidas en un hospital universitario cubano en el contexto de la COVID-19. Material y Métodos: Estudio observacional, analítico y transversal realizado en el servicio de Cirugía Maxilofacial del Hospital General Universitario "Carlos Manuel de Céspedes" durante el 2020. Se obtuvieron razones de prevalencia, intervalos de confianza a 95% y valores p mediante modelos lineales generalizados. Resultados: En el 58.23% de los casos las fracturas se relacionaron con la ingestión de bebidas alcohólicas. La etiología fundamental fue la violencia interpersonal (47.75%), independientemente del consumo o no de bebidas alcohólicas. Predominaron los pacientes con fracturas nasales (n=98; 55.06%), en los que el 35.71% había consumido bebidas alcohólicas en el momento del trauma. El sexo masculino (p=0.005), la carencia de estudios universitarios (p=0.007), la necesidad de tratamiento quirúrgico (p<0.001), las fracturas del complejo cigomático-maxilar (p=0.023), los traumas sucedidos durante los fines de semanas (p<0.001) o durante el mes de junio (p=0.029) fueron factores asociados a una mayor frecuencia de fracturas relacionadas con el consumo de bebidas alcohólicas. Hubo menor frecuencia de fracturas asociadas a este consumo durante los meses de enero (p=0.006) y marzo (p= 0.001). Conclusión: Seis de cada diez casos estuvieron bajo los efectos de la ingestión de bebidas alcohólicas. Existió una mayor afectación de pacientes jóvenes, masculinos, a causa principalmente de la violencia interpersonal.

Osteoblastoma em osso zigomático - relato de caso raro / Osteoblastoma in zygomatic bone ­ rare case report

O osteoblastoma é um tumor frequentemente visto em ossos longos, com pouco envolvimento maxilofacial e raramente localizado em osso zigomático. Devido à sua semelhança clínica e histológica com outros tumores ósseos, o osteoblastoma representa um desafio de diagnóstico para o profissional. A ressecção cirúrgica total é recomendada, sendo que a ausência de recidiva se deve ao diagnóstico correto e tratamento adequado. O objetivo deste artigo é relatar o manejo de um paciente com osteoblastoma envolvendo o osso zigomático e realizar uma breve revisão da literatura.

Osteoblastoma is a tumor often seen in long bones, with little maxillofacial involvement and rarely located in zygomatic bone. Due to its clinical and histological similarity with other bone tumors, osteoblastoma represents a diagnostic challenge for the professional. Total surgical resection is recommended, and the absence of recurrence is due to correct diagnosis and adequate treatment. The aim of this article is to report the management of a patient with osteoblastoma involving the zygomatic bone and to carry out a brief review of the literature.

Injerto de hueso calvarial envuelto en colgajo pediculado de fascia temporo-parietal para reconstrucción de reborde cigomático-maxilar e infraorbitario: reporte de caso / Calvarial bone graft wrapped in temporo-parietal fascia pedicled flap for zygomatico-maxillary and infraorbital rim reconstruction: case report

La reconstrucción posterior a una cirugía oncológica resectiva maxilar es todo un desafío. Debido a esto, existen diversas técnicas quirúrgicas cuyo objetivo apunta a mantener no solo la funcionalidad, sino también la estética facial, especialmente en el área del reborde infraorbitario. El injerto de hueso calvarial es una opción segura y versátil para realizar una reconstrucción primaria en el reborde infraorbitario. Esta técnica está indicada en aquellos pacientes en los cuales la resección cutánea y exenteración orbitaria no son necesarias. Por este motivo, a continuación, analizaremos este tipo de injerto a propósito de un caso clínico en el que se usó asociado a un colgajo pediculado de fascia temporoparietal.

Reconstruction after maxillary resective oncological surgery is a challenge. Because of this, there are many surgical techniques whose objective is to maintain not only function but also facial aesthetics, especially in the infraorbital rim area. The calvarial bone graft is a safe and versatile option to perform a primary infraorbital rim reconstruction. This technique is indicated in those patients in whom skin resection and orbital exenteration are not necessary. For this reason, we will now analyze this type of graft in relation to a case in which it was used associated with a temporo-parietal fascia flap.

Tratamento de fratura isolada do arco zigomático - relato de caso / Treatment of isolated fracture of the zygomatic arch - case report

Devido ao comprometimento estético funcional, as fraturas do arco zigomático (AZ) devem ser abordadas, o mais breve possível, com o objetivo de minimizar as sequelas. Há várias formas de tratamento descritas na literatura. O objetivo deste trabalho é relatar um caso clínico de fratura isolada do AZ tratada pela técnica de Keen sob anestesia local.

Due to functional aesthetic impairment, fractures of the zygomatic arch (ZA) should be addressed, as soon as possible, in order to minimize the sequelae. There are several forms of treatment described in the literature. The objective of this work is to report a clinical case of isolated ZA fracture treated by Keen's technique under local anesthesia.

Novel mutations identified in the WNT10A gene and implant rehabilitation of patients with severe tooth agenesis / 口腔疾病防治

Objective@#To detect WNT10A gene mutations in patients with oligodontia or anodontia (≥6 teeth missing) and analyze their dental phenotype. @*Methods@#Patients with oligodontia or anodontia were enrolled from the clinic for oral examination, genetic history collection and whole exon sequencing, and patients with WNT10A gene mutations were included. Sanger sequencing was utilized to validate the WNT10A gene variations in probands and family members compared with the normal sequence. The pathogenicity of WNT10A mutations was evaluated by functional prediction, conservation analysis and structure prediction of protein mutants. Implant rehabilitation was applied to restore the patients' oral function.@*Results@# Five WNT10A gene mutations were detected in six unrelated patients, and c.26G>A (p. Trp9X) and c.1036delT (p. Cys346fs) were novel mutations with pathogenic potential. The mean number of missing teeth was (15.33±8.64) per case. The most frequently missing permanent teeth were maxillary canines (100%), and the least frequently missing teeth were mandibular first molars (25%). Implant rehabilitation was applied in five patients, and patients were found to have ideal implant osseointegration and functional restoration.@*Conclusion @# This study identified novel WNT10A gene pathogenic variants, enriching the WNT10A gene spectrum and providing new evidence for genetic diagnosis and prenatal consultation. Implant rehabilitation was also proven to be a treatment option for these patients.

Efficacy of navigation-assisted cosmetic incision for reduction and internal fixation in treating unilateral type B zygomatic fracture / 中华创伤杂志

Objective:To analyze the clinical effect of navigation-assisted cosmetic incision for reduction and internal fixation in treating unilateral B-type zygomatic fracture.Methods:A retrospective cohort study was performed on clinical data of 35 patients with unilateral type B zygomatic fracture treated from January 2018 to December 2019 in First Affiliated Hospital of Fujian Medical University. There were 20 males and 15 females at age range of 5-62 years [(38.7±11.3)years]. Navigation-assisted cosmetic incision for reduction and internal fixation was performed for 17 patients (navigation group), and empirical incision to reduction and internal fixation was performed for 18 patients (convention group). The length of bony zygomatic process (zygomatic process) and width of zygomatic temporal point (frontal width) of the bilateral zygomatic bone were measured on the horizontal axis of CT at 1 week after operation. The absolute values of the difference of bony zygomatic process degree and frontal bony width between affected side and the healthy side were compared between the two groups. The patients′ satisfaction and occurrence of complications such as lower eyelid ectropion, incision infection and facial nerve injury were compared between the two groups at half a year after operation.Results:All patients were followed up for 6-24 months [(9.3±1.2)months]. The absolute difference of bony zygomatic process was 0.60(0.25, 0.85) mm in navigation group, and was 0.75 (0.20, 1.98)mm in convention group ( P>0.05). The absolute difference of frontal bony width was (0.37±0.11)mm in navigation group, and was (2.47±0.63)mm in convention group ( P<0.01). Satisfaction rates by both objective evaluation and subjective evaluation in navigation group were better than that in convention group at half a year after operation (both P<0.05). Navigation group showed lower eyelid ectropion in 1 patient and incision infection in 1 patient. Convention group showed facial nerve injury in 1 patient and incision infection in 2 patients. There was no significant difference in the incidence of complications between navigation group [12%(2/17)] and conventional group [17%(3/18)] ( P>0.05). Conclusion:For unilateral type B zygomatic fracture, navigation-assisted cosmetic incision for reduction and internal fixation can more accurately restore the frontal width, and improve satisfaction rate as compared with empirical reduction and internal fixation.

Retrospective study of sports-related maxillofacial fractures in a Brazilian trauma care center

Aim: Maxillofacial fractures occur frequently in the general population, and sports-related fractures represent some of these cases. However, few studies have been carried out in Brazilian populations aimed at sports-related maxillofacial fractures. This study assessed the demographic and fracture characteristics of patients with sports-related maxillofacial fractures who were seen at a Brazilian trauma care center. Methods: Medical records of patients with a history of sports-related maxillofacial fractures treated between January 2018 and December 2019 were retrospectively evaluated. Personal data, fracture characteristics, sport type, treatment performed and need for hospitalization were collected. The data were subjected to statistical analyses with likelihood ratio test using the Statistical Package for Social Sciences (SPSS) 25.0 (p ≤ 0.050). Results: Forty cases (4.96% of the total) of facial fractures were included. The mean age was 24.9 (± 9.8) years, with a predominance of males (92.5%). The use of protective equipment was rare. The most frequently involved sport modality was soccer (47.5%), followed by cycling (27.5%). The most frequent fracture location was nose (45%), followed by mandible (25%) and zygomatic complex (17.5%). Soccer was responsible for most nose fractures (61.1%), while cycling caused the majority of mandibular fractures (60%). Conservative treatment predominated (60%). There was only a significant difference between fracture location and the need for hospitalization (p = 0.021). Conclusion: Patients with sportsrelated maxillofacial fractures were typically young adult males, the injury was more often located in the nose and mandible and related to soccer or cycling. The use of protective equipment must be reinforced

Diagnostic properties of sensitivity changes in patients with maxillofacial fractures: a systematic review

Aim: Verify the accuracy of objective assessments compared to subjective tests in detecting changes in somatosensory perception in individuals affected by maxillofacial trauma. Methods: The review (PROSPERO n ° CRD42019125546) used the databases: MEDLINE, Cochrane, EMBASE, LILACS and other bibliographic resources. Prospective and retrospective studies that used objective and subjective methods of assessing facial sensitivity in maxillofacial fractures were included. There was no restriction on language or publication date. Risk of bias was assessed using the QUADAS-2. Data extraction and analysis were performed using a form developed for the study. Results: 21 studies were included. The clinical objective examination mainly includes assessments of: tactile sensitivity (95.24%) and nociceptive sensitivity (57.14%). The subjective assessment was based on the patient's report, spontaneously (61.90%), guided by structured questionnaires (33.33%) and/or using scales (9.52%) to measure the degree of impairment. In risk of bias assessment, were observed no adequate interpretation and classification of changes in subjective sensitivity, subject to inappropriate analysis of the data. In addition, the studies bring several instruments without standardization for assessing sensory modalities. Conclusion: The objective assessment is a complement to the subjective assessment, using the touch assessment as the main parameter in the profile of the facial peripheral integrity, associated or not with nociceptive assessment. Lack of consensus on the indication of specific instruments for testing is a limiting factor. Thus, based on the studies, is proposed a minimum battery of sensitivity assessment to obtain an overview of the patient's peripheral nervous situation

Fratura do complexo zigomático orbitário: relato de caso / Fracture of the Zygomatic Orbital Complex: Case report

Fraturas faciais podem ocorrer de forma isolada ou concomitante a outras lesões. O complexo zigomático orbitário (CZO) ocupa uma posição proeminente da face, deixando-o bastante susceptível a traumas de alto e baixo impacto, que podem causar afundamento facial. O trauma de face frequentemente resulta em danos ao tecido ósseo, tecido mole e elementos dentários, causando prejuízo na função e estética do paciente. Os acidentes automobilísticos são uma das causas mais significativas de traumas faciais. As fraturas do terço médio da face incluem as que afetam a maxila, o zigoma e complexo NOE. O presente estudo tem por objetivo relatar o caso clínico de um paciente de 47 anos, sexo masculino, vítima de acidente automobilístico (carro x carro). Diagnosticado com fratura do CZO direito, classe IV. Foi realizada redução incruenta da fratura de arco zigomático; redução e fixação interna rígida de fratura de parede lateral de órbita e pilar zigomático com instalação de camadas de surgicel na região para melhora do contorno, resultando em regressão do afundamento malar e consequente reestabelecimento estético funcional. Estudos como este podem ser fonte de referência em busca constante pelo aprimoramento profissional, objetivando completo domínio teórico-prático das formas de condutas e tratamentos específicos à situação em questão... (AU)

Facial fractures may occur in isolation or concomitantly with other injuries. The zygomatic orbital complex (ZOC) occupies a prominent position of the face, leaving it quite susceptible to high and low impact trauma, which can cause facial sinking. Face trauma often results in damage to bone tissue, soft tissue and dental elements, causing injury to the patient's function and aesthetics. Auto accidents are one of the most significant causes of facial trauma. Fractures of the middle third of the face include those affecting the maxilla, the zygoma, and the NOE complex. The present study aims to report the clinical case of a 47-year-old male patient, victim of an automobile accident (car x car). Diagnosed with right CZO fracture, class IV. A non-invasive reduction of the zygomatic arch fracture was performed; reduction and rigid internal fixation of lateral wall orbital fracture and zygomatic pillar with installation of surgicel layers in the region to improve the contour, resulting in regression of the malar sinking and consequent functional aesthetic reestablishment. Studies like this can be a source of reference in constant search for professional improvement, aiming at a complete theoretical-practical domain of the forms of conduct and treatments specific to the situation in question... (AU)

Anatomy and measurement of the zygomatic ligaments / 中华医学美学美容杂志

Objective:To figure out the structure and relevant data measurements of zygomatic ligament by cadaver anatomy and review of previous studies.Methods:From July 2018 to January 2020, the zygomatic areas of 20 Chinese frozen fresh cadaver hemifaces were dissected in the Department of Anatomy, Health Science Center of Hangzhou Normal University. Then the structures of zygomatic ligaments were shown. The characters of the ligament and the relationship with adjacent tissue were described and measured. And 16 previous studies were reviewed to get a comprehensive description about the characters of zygomatic ligaments.Results:Zygomatic ligaments were even and dense fibrous tissue structures distributed vertically between the skin and the subcutaneous tissue. Under the SMAS plane, the ligaments divided into two bundles. The origin of major bundle located beyond the origin of the zygomatic major muscle on the periosteum, and the origin of minor bundle located between the origin of the zygomatic minor and major muscle.Conclusions:The anatomy of the zygomatic ligament has a regular pattern, and its anatomical data has certain directive significance for clinical application.

Reacciones musculares faciales ante imágenes con diferente contenido social. Un índice fisiológico de empatía afectiva / Facial muscle reactions to pictures with different social content. A physiological index of affective empathy

Resumen La empatía tiene dos componentes, el afectivo y el cognitivo. La empatía afectiva es la capacidad para sintonizarse afectivamente con las emociones que experimentan otras personas. Su medición se ha hecho, tradicionalmente, a través de medidas de auto-reporte, sin embargo, algunos estudios de población latinoamericana han utilizado medidas fisiológicas de la empatía afectiva. Adicionalmente, se ha planteado la hipótesis de que las personas expuestas a contenido gráfico violento (ej., conflicto armado) pueden estar desensibilizadas hacia este tipo de estímulos. Por ello, el objetivo del presente estudio fue evaluar la actividad de los músculos cigomático y corrugador ante imágenes con diferente contenido social, con el fin de establecer la validez de estas medidas fisiológicas como indicadores objetivos de empatía afectiva. Se registró la actividad electromiográfica de estos músculos faciales en 60 sujetos (30 con alta y 30 con baja empatía afectiva), mientras observaban imágenes con contenido social positivo, neutral y negativo. Los resultados mostraron que los participantes con alta empatía afectiva respondieron con mayor actividad del músculo cigomático ante imágenes sociales positivas y con mayor actividad del músculo corrugador ante imágenes sociales negativas, en comparación con los participantes con baja empatía afectiva. También se encontró una relación positiva y significativa entre los puntajes en la escala de preocupación empática y la actividad de los músculos cigomático y corrugador ante imágenes positivas y negativas, respectivamente. Los resultados sugieren que la actividad electromiográfica de los músculos faciales es un indicador objetivo de empatía afectiva y se recomienda utilizarlo para aumentar la validez de los estudios en este campo. No se encontró evidencia de desensibilización ante estímulos sociales aversivos en esta muestra.

Abstract Empathy has two components, the affective and the cognitive component. Affective empathy is the ability to emotionally tune into the emotions that other people experience. Its measurement has been done, traditionally, through self-report measures, however, there are some studies in Latin American population that have used physiological measures of affective empathy. Additionally, it has been hypothesized that people exposed to violent graphic content (e.g., armed conflict) may be desensitized to this type of stimulus. In this context, the objective of the present study was to evaluate the activity of the zygomatic and corrugator muscles to pictures with different social content, in order to establish the validity of these physiological measures as objective indicators of affective empathy. The electromyographic activity of these facial muscles was recorded in 60 subjects (30 with high affective empathy and 30 with low affective empathy), while observing pictures with positive, neutral and negative social content of the International Affective Picture System (IAPS). The results showed that the participants with high affective empathy responded with greater zygomatic muscle activity to positive social pictures (.2,96= 5.93, . = .01, η.. = .11) and with greater corrugator muscle activity to negative social pictures (.2,96 = 4.85, . = .02, η.. = .09), in comparison with participants with low affective empathy. The correlation and regression analyzes show a positive and significant relationship between the scores in the empathic concern scale of the Interpersonal Reactivity Index (IRI) and the activity of the zygomatic muscle to positive social pictures (β = .39, R. = .15, . = 3.00, . = .004), and the corrugator muscle activity to negative social pictures (β = .27, R.= .07, . = 1.99, . = .05). The results suggest that the electromyographic activity of the facial muscles is an objective indicator of affective empathy. The increase in the activity of the zygomatic and corrugator muscles in people with high affective empathy, when they observe stimuli with different social content, can be supported by the mirror neuron system and the theory of simulation as an explanatory mechanism of empathy. The mirror neuron system is composed of a complex network of visual areas in the occipital, parietal and temporal regions and two predominantly motor regions, which interact to generate movements similar to those observed, in this case the facial expressions of the stimuli. This response in facial mimicry induces affective states similar to those observed, which leads to a response of affective empathy. Finally, the results of the present study do not support the hypothesis of a desensitization in the participants to negative social stimuli due to the fact of being Colombian, because independently of the level of affective empathy, all of them responded with greater activity of the corrugator muscle to negative social pictures in comparison with neutral and positive pictures. However, as shown in the results, this response was significantly higher in participants with high affective empathy. This result cannot be generalized to the entire Colombian population, given the small size of the sample and its origin. Overall, the results suggest that responses of the zygomatic and corrugator muscles to stimuli with different social content are reliable indicators of affective empathy, and can be used as physiological markers of this kind of empathy in neuroscience and psychophysiology research. No evidence of desensitization was found toward aversive social stimuli in this sample.

Fixação single-point com placa reabsorvível em fratura pediátrica: relato de caso / Single-point fixation with resorbable plate in pediatric fracture: case report

Introdução: As fraturas faciais pediátricas são geralmente decorrentes de traumas de alta energia e o seu tratamento está relacionado à fase do crescimento facial e do padrão do trauma ocorrido. A literatura atual descreve, com sucesso, a fixação de fraturas de zigoma com pouco deslocamento, utilizando apenas um ponto, seja ele na sutura frontozigomática ou no pilar zigomaticomaxilar, podendo ser associado ao uso de placas do sistema de fixação absorvível, principalmente, em pacientes em fase de crescimento. Este trabalho tem por objetivo relatar um caso de fratura de zigoma em paciente pediátrico tratado com placa e parafusos absorvíveis, utilizando o princípio de fixação em um único ponto. Relato de caso: Paciente de 06 anos de idade foi atendido em serviço de Cirurgia Bucomaxilofacial, cursando com ferimento cortocontuso em margem supraorbitária direita associada à presença de degrau palpável em região de sutura frontozigomática direita, o qual foi confirmado pela tomografia computadorizada, demonstrando leve deslocamento medial. O paciente foi submetido à redução aberta e fixação da fratura com material reabsorvível. Considerações finais: A utilização de fixação com placas reabsorvíveis em um único ponto tem sido um excelente aliado, porém não é indicado para fraturas com deslocamento significativo, instáveis e panfaciais... (AU)

Introduction: Pediatric facial fractures are usually consequence of high energy trauma and its treatment is related to the facial growth phase and the trauma itself. The current literature describes, successfully, the fixation of zygoma fracture with little displacement using the single point fixation, being on the frontozygomatic suture or on the zygomatic-maxillary buttress, which can be associated to the use of resorbable fixation system plates, especially in patients growing phase. The aim of this work is report a case of zygomatic fracture in a pediatric patient treated with plate and resorbable screws, using the principle of single-point fixation. Case Report: A 06-year-old patient, attended in the Oral and Maxillofacial Surgery Service, suffering from a cut-contusion wound on the right supraorbital margin associated with the presence of a palpable step in the region of the right frontozygomatic suture, which was confirmed by computed tomography, demonstrating slight medial displacement. The patient was underwent to open reduction and internal fixation of the fracture with resorbable material. Final considerations: The use of fixation with resorbable plates in a single-point has been an excellent approach, however it is not indicated for fractures with significant displacement, unstable and panfacial... (AU)

Tratamento tardio de fratura do complexo zigomático-orbitário com uso de fixação interna rígida / Late treatment of the zygomatic-orbital complex fracture with rigid internal fixation

RESUMO: As fraturas do complexo zigomático-orbitário são bastante frequentes devido a sua localização e projeção na face, podendo gerar grandes transtornos funcionais e estéticos ao paciente. O osso zigomático é essencial na configuração da face, sendo a principal estrutura formadora do terço médio dela. Os traumas que mais frequentemente provocam fraturas do complexo zigomático-orbitário são agressões físicas, acidentes de trânsito e esportivos. O tipo de fratura, tempo decorrido, a severidade e o envolvimento de outras estruturas faciais influenciam a modalidade de tratamento a ser empregado. O presente trabalho apresenta um caso clínico de fratura do complexo zigomático-orbitário esquerdo, diagnosticada tardiamente, e tratada por meio de osteotomia, redução e fixação em três pontos com placas e parafusos do sistema 1.5, e reconstrução do assoalho orbitário com tela de titânio. (AU)

ABSTRACT: Fractures of the zygomatic-orbital complex are quite frequent due to their location and projection on the face, which can cause major functional and aesthetic disorders to the patient. The zygomatic bone is essential in the configuration of the face, being the main forming structure of the middle third of it. The traumas that most often cause fractures of the zygomatic-orbital complex are physical aggression, traffic accidents, and sports. The type of fracture, elapsed time, severity, and the involvement of other facial structures influence the type of treatment to be employed. The present work presents a clinical case of fracture of the left zygomatic-orbital complex, diagnosed late, and treated by osteotomy, reduction, and fixation in three points with 1.5 system plates and screws, and reconstruction of the orbital floor with titanium mesh. (AU)