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.

Retalho de avanço formato A-T para reconstrução malar / A-T flap for cheek reconstruction

A região malar é a maior unidade anatômica da face. Nessa área, o tratamento cirúrgico do câncer de pele deve objetivar, além de sua erradicação completa, o melhor resultado estético-funcional possível. Paciente do sexo feminino, 69 anos, com tumoração de 3,5cm na região malar esquerda há três anos, teve evidenciado, por biópsia, carcinoma espinocelular moderadamente diferenciado. Realizaram-se exérese do tumor e reconstrução por meio do retalho A-T, em que o defeito cirúrgico correspondeu ao "A" e o encontro dos sulcos do rebordo orbital inferior, nasofacial e nasogeniano, ao teto do "T". A paciente evoluiu sem recidiva e com excelente aspecto estético-funcional.

The cheek is the largest anatomical unit of the face. In this area, surgical skin cancer treatment must aim for its complete eradication and the best aesthetic-functional result. A 69-year-old woman presented with a 3.5 cm tumor in the left cheek for three years. Biopsy showed moderately differentiated squamous cell carcinoma. We performed an A-T flap, where the surgical defect corresponded to the "A" and the junction of the inferior orbital, nasofacial, and nasolabial grooves, to the top of the "T". The patient evolved without recurrence and had an excellent aesthetic-functional aspect.

Research progress on the design of fixed implant-supported prostheses in edentulous jaws / 口腔疾病防治

@#With the aging of the population and the increase in the number of edentulous patients, implant-supported fixed restorations have become more prevalent in clinical treatment. It is necessary to assess the patient's remaining bone and occlusal situation correctly; the upper jaw usually needs 6 to 8 implants, whereas the lower jaw needs 4 to 6 implants. Patients with severe alveolar bone atrophy can adopt the "all-on-4/6" treatment plan, short implants, and zygomatic and pterygomaxillary implants to avoid complex bone grafting and remain cautious when the surgical procedures require more surgical experience. According to the repair methods, the superstructure can be divided into one-piece repair and segmental repair. One-piece repair has a lower implant number, flexible location, and reasonable stress distribution but a high maintenance cost. Sectional repair easily achieves passive placement, convenient cleaning, and maintenance in the late stages, but implants need quantity and high requirements for alveolar bone. However, the requirements for alveolar bone and implant number are high. Mutually protected occlusion with minimal or no cantilever on provisional prosthesis is recommended.

Relationship between prognosis and different surgical treatments of zygomatic defects: A retrospective study / 北京大学学报(医学版)

OBJECTIVE@#To evaluate the effect and summarize the characteristics of different treatment methods in repairing zygomatic defect.@*METHODS@#A total of 37 patients with zygomatic defect were reviewed in the Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology from August 2012 to August 2019. According to the anatomical scope of defect, the zygomatic defects were divided into four categories: Class 0, the defect did not involve changes in zygomatic structure or continuity, only deficiency in thickness or projection; Class Ⅰ, defect was located in the zygomatic body or involved only one process; Class Ⅱ, a single defect involved two processes; Class Ⅲa, referred to a single defect involving three processes and above; Class Ⅲb, referred to zygomatic defects associated with large maxillary defects. The etiology, defect time, defect size and characteristics of zygomatic defects, the repair and reconstruction methods, and postoperative complications were collected and analyzed. Postoperative computed tomography (CT) data were collected to evaluate the outcome of zygomatic protrusion. Chromatographic analysis was used to assess the postoperative stability.@*RESULTS@#Among the causes of defects, 25 cases (67.57%) were caused by trauma, and 11 cases (29.73%) were of surgical defects following tumor resection. We performed autologous bone grafts in 19 cases, 6 cases underwent vascularized tissue flap, 5 cases underwent external implants alone, and 7 cases underwent vascularized tissue flap combined with external implants. After the recovery of the affected side, the average difference of the zygomatic projection between the navigation group and the non-navigation group was 0.45 mm (0.20-2.50 mm) and 1.60 mm (0.10-2.90 mm), with a significant difference (P=0.045). Two patients repaired with titanium mesh combined with anterolateral thigh flap had obvious deformation or fracture of titanium mesh; 2 patients with customized casting prosthesis had infection after surgery and fetched out the prosthesis finally.@*CONCLUSION@#Autologous free grafts or alloplastic materials may be used in cases without significant structural changes. Pedicle skull flap or vascularized bone tissue flap is recommended for zygomatic bone defects with bone pillar destruction, chronic inflammation, oral and nasal communication or significant soft tissue insufficiency. Titanium mesh can be used to repair a large defect of zygomatic bone, and it is suggested to combine with vascularized bone flap transplantation.

Reconstrução de fratura panfacial cominuta ­ relato de caso / Reconstruction of panfacial fracture - case report

RESUMO: Modelo de estudo: Relato de Caso. Importância do problema: As fraturas panfaciais recebem essa denominação quando os terços faciais apresentam fraturas concomitantes. Com frequência, essas lesões estão relacionadas a danos importantes aos tecidos moles, cominuição e perda de segmentos ósseos e/ou dentários, que podem gerar má oclusão e graves deformidades faciais, visto que etiologia de tal condição se deve à acidentes de alta dissipação de energia. O tratamento das fraturas panfaciais com o uso de fixação interna rígida permite restaurar as funções mastigatórias, bem como os contornos faciais. Comentários: O objetivo desse trabalho é relatar a reconstrução de uma fratura panfacial, envolvendo a mandíbula e com elevado grau de cominuição do complexo zigomático orbitário e do arco zigomático, em uma paciente do sexo feminino, em que acesso hemicoronal e retromandibular foram escolhidos para reconstrução e reestruturação do complexo facial. Conclusão: O correto manejo das fraturas panfaciais, é um dos grandes desafios do cirurgião buco maxilo facial, visto o nível de dificuldade para reestabelecer de maneira satisfatória as condições estéticas e funcionais existentes previamente ao trauma. Diferentes sequências de tratamento vêm sendo propostas, podendo ser utilizadas com sucesso após análise adequada do caso clínico e correta indicação. (AU)

ABSTRACT: Study model: Case Report. Importance of the problem: Panfacial fractures receive this designation when the facial thirds have concomitant fractures. Frequently, these lesions are related to important soft tissue damage, comminution, and loss of bone and/or dental segments, which may lead to malocclusion and severe facial deformities, since the etiology of such condition is due to accidents of high energy dissipation. The treatment of the panfacial fractures with the use of rigid internal fixation allows restoring the masticatory functions, as well as the facial contours. Comments: This study aimed to report the reconstruction of a panfacial fracture, involving the mandible and with a high degree of comminution of the zygomatic or zygomatic arch, in a female patient, whose hemicoronal and retromandibular access were chosen for reconstruction and restructuring of the facial complex. Conclusion: The correct management of panfacial fractures is one of the greatest challenges of the maxillofacial surgeon, given the level of difficulty to satisfactorily reestablish the aesthetic and functional conditions existing before the trauma. Different treatment sequences have been proposed to be used successfully after adequate analysis of the clinical case and correct indication. (AU)

Tratamento de fratura órbito-zigomático-maxilar complexa decorrente de acidente motociclístico / Treatment of complex orbito-zygomatic-maxillary fracture due to motorcycle accident

Introdução: O complexo zigomático é a segunda estrutura mais fraturada do esqueleto facial em acidentes motociclísticos, perdendo em incidência, apenas, para fraturas de mandíbula. Fraturas de zigoma podem causar complicações oculares, parestesias na face, perda de projeção ântero-posterior, levando a defeitos ósseos que causam danos estéticos e funcionais ao paciente, se não forem tratados de forma correta. Relato de caso: A vítima de acidente motociclístico com trauma de face apresentou-se com queixas estéticas e funcionais, com diagnóstico conclusivo de fratura em complexo zigomático. Realizou-se um acesso hemicoronal com extensão endaural, o que permitiu a visualização das fraturas do arco zigomático direito e da região da sutura fronto-zigomática direita, acesso transconjutival para abordagem do rebordo infraorbitário e acesso intraoral para o pilar zigomático maxilar. As fraturas foram reduzidas e fixadas com placas e parafusos do sistema 1.5mm. Somente o pilar zigomático foi fixado com placas e parafusos de 2.0mm. Considerações Finais: Fraturas complexas do osso zigomático podem representar um verdadeiro desafio cirúrgico. Planejamento prévio por meio de exames de imagem adequados é fundamental para se definir o tipo de tratamento e os acessos cirúrgicos adequados... (AU)

Introduction: The zygomatic complex is the second part of the facial skeleton that most fracture incidence after motorcycle accidents, in losing only chip fractures of the mandible bone. Zygoma fractures can cause eye complications, paresthesias in the face, loss of anteroposterior projection, leading to bone defects that cause cosmetic and functional damage to the patient, if not treated properly. Case report: The victim of a motorcycle accident with facial trauma presented with aesthetic and functional complaints, with a conclusive diagnosis of fracture in a zygomatic complex. A hemi-coronal approach with endaural extension was performed, which allowed the visualization of fractures of the right zygomatic arch and right fronto-zygomatic suture region, transconjutival access to approach the infraorbital ridge and intraoral access to the zygomatic pillar. jaw. Fractures were reduced and fixed with 1.5mm system plates and screws. Only the zygomatic abutment was fixed with 2.0mm plates and screws. Final Considerations: Complex zygomatic bone fractures can represent a real surgical challenge. Prior planning through appropriate imaging exams is critical to defining the type of treatment and appropriate surgical access... (AU)

A 3D-Computed Tomography Angiography Study to Help in Surgical Planning for Retrosigmoid Craniotomies

Aims and Objectives: It is impossible to precisely anticipate the course of the transverse and sigmoid sinuses and theirindividual relationship to superficial landmarks such as the asterion during retrosigmoid approaches. This study was done todetermine the position of the asterion and the relationship between asterion and the transverse-sigmoid sinus junction (TSSJ)in making precise burr hole without damaging sinuses during retrosigmoid craniotomies.Materials and Methods: Computed tomography (CT) angiography was performed in 50 patients to obtain 3D-CT volumerendering images of cranial bone and dural sinuses. After delineating the sinuses, by simple restructuring using software andopacity modulation, bone image is reinforced. Asterion type, distance from the tip of mastoid process to asterion and root ofzygoma (ROZ) to asterion, and location of asterion in relation to TSSJ and distance between asterion and TSSJ were analyzedand measured.Results: The incidence of type 1 (presence of sutural bones) in our study was 24% and type 2 (absence of sutural bones) was76%. There was no statistically significance in the side and gender differences. The distance between the asterion and fromthe ROZ was 54.70 ± 3.68 on the right side and 54.32 ± 3.41 on the left side (P-0.612). The distance between asterion and tipof mastoid was 50.51 ± 2.67 on the right side and 50.12 ± 3.06 on the left side (P-0.716). The asterion was located on the T-Ssinus complex in 36 (72%) cases. The asterion was below the T-S sinus complex in 13 (26%) cases, and above the T-S sinuscomplex in only 1 (2%) cases.Conclusion: 3D-CT volume rendering imaging is capable of accurately visualizing the bony landmark and dural sinuses. Aneasy and simple restructured image provides precision and safety for the patient by ready and easy localization of asterionand TSSJ. This study was done to show that the previous cadaver-based anatomical studies can be done now in a moresophisticated and accurate manner with the latest technological advancements. This offers new options for anatomic researchand morphometric investigations.

Reabilitação de maxila atrófica com implantes zigomáticos: relato de caso / Rehabilitation of atrophic maxilla with zygomatic implants: case report

Introdução: maxilas severamente atrofiadas representam um desafio às reabilitações implantossuportadas. A reconstrução maxilar com enxertos ósseos para permitir a reabilitação com implantes osseointegrados é um tratamento com boa previsibilidade e alto índice de sucesso. No entanto, a morbidade causada pela necessidade de regiões doadoras e grande quantidade de osso dificulta a aceitação dos pacientes, podendo, inclusive, ser contraindicada dependendo da condição sistêmica. Objetivos: revisar a literatura, discutir as indicações, as complicações, a previsibilidade das reabilitações com implantes zigomáticos, assim como relatar um caso. Relato de caso: os implantes zigomáticos surgiram como uma alternativa para a reabilitação de pacientes maxilectomizados, decorrente da exérese de tumores, perdas ósseas decorrentes de infecções ou traumas, e casos de atrofia óssea severa, como abordado no caso em questão, em que a paciente apresentava edentulismo total em maxila e não gostaria mais de utilizar a prótese convencional, optando pela prótese sobre implante. Considerações finais: a reabilitação com implantes zigomáticos pode apresentar complicações, como o mau posicionamento dos implantes, comprometendo a reabilitação; todavia, apesar das restrições da técnica, a literatura mostra que os implantes zigomáticos, quando bem indicados, representam uma boa alternativa para a reabilitação de maxilas severamente atrofiadas.(AU)

Introduction: severely atrophied jaws pose a challenge to implant-supported rehabilitations. Maxillary reconstruction with bone graft to allow rehabilitation with implants is a treatment with good predictability and high success rate. However, a morbidity is the disease of the donor regions and the greater amount of bone hinders the acceptance of the patients; including, to be contraindicated depending on the systemic condition. Objectives: this article is a review of the literature, such as the indications, complications, predictability of rehabilitations with zygomatic implants, as well as a case report. Case report: the zygomatic implants appeared as an alternative for the rehabilitation of maxilectomized patients, due to the excision of tumors, bone losses due to infections or trauma and cases of severe bone atrophy, as approached in the case in question, in which the patient had total maxillary edentulism and would no longer like to use the conventional prosthesis, opting for the implant prosthesis. Final considerations: rehabilitation with zygomatic implants may present complications, such as poor placement of implants, compromising rehabilitation; however, despite the limitations of the technique, the literature shows that zygomatic implants, when well indicated, represent a good alternative for the rehabilitation of severely atrophied maxilla.(AU)

Implantes zigomáticos de carga imediata: relato de caso / Immediate load zygomatic implants: case report

Introdução: atualmente, o relevante desafio enfrentado pela odontologia se constitui na redução do tempo de tratamento e na restrição dos procedimentos cirúrgicos, na perspectiva de se assegurar o máximo conforto às pessoas que buscam a reabilitação oral. Em se tratando de pacientes edêntulos totais, os eventos que devem ser desenvolvidos demandam de um planejamento correto tendo em consideração o tempo de execução. Face a esses pressupostos, a reabilitação oral busca reconstituir a mastigação, a estética, o suporte labial e a fonética. Objetivo: o caso clínico ora descrito visa demonstrar a instalação de 4 implantes zigomáticos seguindo-se da colocação da prótese definitiva em sistema de carga imediata. Metodologia: com base na literatura científica e tendo em vista a limitação das condições anatômicas e clínicas apresentadas pela paciente do sexo feminino, com 68 anos de idade e boa saúde, fez-se a opção pela instalação de 4 implantes zigomáticos associada à técnica de carga imediata. Resultado e conclusão: em compatibilidade com os dados da literatura, o êxito cirúrgico e a reabilitação oral alcançados, associados à satisfação manifestada pela paciente, são indicadores de elevada previsibilidade quanto à longevidade da sobrevida dos implantes zigomáticos instalados.

Introduction: currently, the relevant challenge faced by dentistry constitutes in reduce treatment time and restrict surgical procedures, in order to ensure maximum comfort to people seeking oral rehabilitation. In case of total patient treatment, the events to be displayed require correct planning, taking into account the execution time. Do to these assumptions, the oral rehabilitation seeks to reconstitutes chewing, aesthetics, lip and phonetic support. Objective: the clinical case aims to demonstrate the installation of 4 zygomatic implants following the placement of the definitive prosthesis in the immediate loading system. Methodology: based on scientific literature and in view of the limitation of the anatomical and clinical conditions applied by the 68-year-old female patient, she choose to install 4 zygomatic implants used in the immediate loading technique. Result and conclusion: in line with literature data, surgical and oral rehabilitation achieved, associated with patient satisfaction, are indicators of increased predictability regarding the longevity of survival of the zygomatic implants used.

Fracturas del complejo cigomático / Fractures of the zygomatic complex

Introducción: El complejo cigomático maxilar con su convexidad prominente, es muy vulnerable a las lesiones. Objetivo: Abordar elementos actuales sobre el diagnóstico, clasificación, tratamiento y complicaciones de las fracturas del complejo cigomático. Métodos: Se realizó una revisión bibliográfica en septiembre de 2016. Se evaluaron revistas de impacto de Web of Sciencies (29 revistas) y 2 libros. Se consultaron las bases de datos de MEDLINE, PubMed y SciELO con los descriptores: zygomatic fracture, treatment, epidemiology. Se incluyeron artículos en idioma inglés, preferentemente de los últimos 5 años. Se obtuvieron 109 artículos. El estudio se circunscribió a 41. Análisis e integración de la información: El correcto diagnóstico basado en los hallazgos clínicos y medios auxiliares de diagnóstico, permite clasificar la fractura. La clasificación más empleada en nuestro medio es la de las Guías Prácticas de Estomatología. Las modalidades terapéuticas pueden incluir el tratamiento quirúrgico con el uso de métodos de fijación que permiten mayor o menor estabilidad. Las complicaciones pueden aparecer. Conclusiones: La proyección anatómica de los huesos malares justifica la incidencia de estas fracturas. El diagnóstico debe basarse en el interrogatorio, examen físico y los medios auxiliares de diagnóstico imaginológicos. La radiografía Waters es una buena opción de imagen. Al clasificar la fractura se establece un plan de tratamiento basado en la valoración individual de cada caso con el objetivo de evitar complicaciones posteriores(AU)

Introduction: Due to its prominent convexity, the zygomaticomaxillary complex is very vulnerable to injuries. Objective: Address current notions about the diagnosis, classification, treatment and complications of fractures of the zygomatic complex. Methods: A literature review was conducted in September 2016. The evaluation included high impact journals from the Web of Science (29 journals) and 2 books. The databases MEDLINE, PubMed and SciELO were consulted, using the search terms zygomatic fracture, treatment, epidemiology. Papers written in English were included, preferably from the last five years. Of the 109 papers obtained, the study considered 41. Data analysis and integration: Appropriate diagnosis based on clinical findings and the use of diagnostic aids allows classification of the fracture. The classification most commonly used in our environment is that of the Dental Practice Guidelines. Therapy modes may include surgery with fixation methods allowing greater or lesser stability. Complications may appear. Conclusions: The anatomical protrusion of malar bones accounts for the incidence of these fractures. Diagnosis should be based on interrogation, physical examination and the use of auxiliary diagnostic imaging. Waters radiography is a good imaging option. Upon classification of the fracture, a treatment plan is devised based on individual assessment of each case so as to prevent future complications(AU)

Fratura zigomática tratada com fixação em ponto único (single point) / Zigomatic fracture treated with single point

Objetivo: Relatar um caso de fixação de zigoma em ponto único "single point". Relato do caso: Paciente do gênero masculino, 58 anos, saudável, pardo, foi encaminhado ao Pronto Socorro Municipal do município de Osasco/SP relatando ter sido assaltado, sofrendo trauma facial. Ao exame físico específico observou-se perda de projeção zigomática direita, degrau palpável na sutura fronto zigomática, degrau mínimo no rebordo infra orbital e movimentação ocular normal, sem perda de sensibilidade na porção infra orbital. O paciente foi informado do diagnóstico e necessidade de tratamento cirúrgico. Após exames laboratoriais e consentimento, foi submetido a procedimento composto por: acesso supratarsal, exposição da fratura, redução, checagem da projeção e fixação utilizando miniplaca 2.0 mm. Procedeu-se a nova checagem da posição do zigoma onde verificou-se a resolução do degrau na margem infraorbital. No controle pós-operatório, observou-se abertura bucal normal e restauração da projeção zigomática. Conclusão: Quando corretamente indicadas, as fixações em ponto único trazem benefícios como menores custos, menor morbidade, melhora da estética facial e redução do risco de ocorrer lesões sensoriais e o incômodo quando são utilizadas as miniplacas e parafusos.

Aim: To report a case of single-point zygoma fixation. Case report: A 58-year-old male, healthy, brown patient was referred to the Municipal Emergency Room in the city of Osasco / SP, reporting that he had been assaulted, suffering facial trauma. At the specific physical examination, there was loss of right zygomatic projection, palpable step in the zygomatic frontal suture, minimal step in the infraorbital border and normal ocular movement, without loss of sensitivity in the infra-orbital portion. The patient was informed of the diagnosis and the need for surgical treatment. After laboratory tests and consent, the patient was submitted to a procedure consisting of: supratarsal access, fracture exposure, reduction, check of the projection and fixation using mini-plate 2.0 mm. A new check of the zygoma position was performed, where the resolution of the step in the infraorbital margin was verified. Postoperative control revealed a normal oral opening and restoration of the zygomatic projection. Conclusion: When correctly indicated, single-point fixations bring benefits such as lower costs, lower morbidity, improved facial aesthetics and reduced risk of sensory lesions, and discomfort when using miniplates and screws.

Open reduction of zygoma fractures with the extended transconjunctival approach and T-bar screw reduction

BACKGROUND: Zygomaticomaxillary complex (ZMC) fractures mostly occur in the form of tripod fractures. The surgical field is accessed using a combination of three classic approaches. However, the subciliary incision may have unfavorable aesthetic results. Herein, the authors report the advantages of the extended transconjunctival approach (ETA) combined with T-bar screw reduction in minimizing scarring and complications for the treatment of ZMC fractures. METHODS: A total of 26 patients underwent ZMC reduction through the ETA and intraoral approach. A skin incision measuring roughly 5 to 8 mm in length was placed following the lateral canthal skin crease. After releasing the inferior crus of the lateral canthal tendon for canthotomy, the medial periosteum of the lateral orbital rim was preserved for canthal reattachment. A limited subperiosteal dissection and partial relaxing incision of the orbicularis oculi were performed to expose the fracture line of the inferior orbital rim and zygomaticofrontal suture. Reduction was performed using a T-bar screw through the transconjunctivalincision and an elevator through the intraoral incision. RESULTS: The aesthetic and functional results were excellent. Successful reduction was achieved and the skin incision was less than 8 mm in 20 cases (76.9%). Only six patients had an additional skin incision (less than 5 mm) to achieve reduction. No cases of ectropion, entropion, or excessive scarring were noted. CONCLUSIONS: The ETA using a T-bar screw is a useful method for maximizing aesthetic results in ZMC fractures, with the advantages of minimal scarring, faster recovery, and maintenance of pretarsal fullness.

A Case of a Central Giant Cell Granuloma in the Right Zygomatic Bone / 대한이비인후과학회지

The central giant cell granuloma is a benign tumor seen generally in the mandible, but rarely in other cranial bones. Herein, we present a 51-year-old man with central giant cell granuloma in the right zygomatic bone. Physical and radiologic examinations of the central giant cell granuloma in the zygomatic bone showed that specific and preoperative diagnosis is usually difficult. Therefore, clinicians should consider the possibility that central giant cell granuloma may occur in the zygomatic bone mimicking other more frequently observed lesions.

Double support technique in malar reduction surgery / 中华整形外科杂志

Objective@#To present a new method for correction of prominent malar complex via intraoral approach by double support technique osteotomy which can provide a stable support.@*Methods@#According to the anatomical characteristics of malar complex and relevant masseter muscle, we designed a malar reduction technique including anterior and posterior support. The reduction procedure entailed an L-shaped osteotomy ofthemalarbody and oblique osteotomy of malar arch. On the basis of prominence degree, bone fragment was moved inward and upward to form double support, which could reduce malar and zygomatic arch effectively.@*Results@#A total of 76 patients subjected to double support technique for malar reduction between January 2015 and January 2017 were retrospectively reviewed.The follow-up period ranged from 10 to 12 months. All patients were satisfied with aesthetic outcomes without major complications, such as facial nerve damage or bone ununion.@*Conclusions@#Double support technique is an effective method to correct malar prominence andreduce the zygomatic complex which can prevent saggy cheek and bony malunion.

Modified Orbitozygomatic Approach without Orbital Roof Removal for Middle Fossa Lesions

OBJECTIVE: The purpose of the present study was to describe an OrBitoZygomatic (OBZ) surgical variant that implies the drilling of the orbital roof and lateral wall of the orbit without orbitotomy.METHODS: Design : cross-sectional study. Between January 2010 and December 2014, 18 patients with middle fossa lesions underwent the previously mentioned OBZ surgical variant. Gender, age, histopathological diagnosis, complications, and percentage of resection were registered. The detailed surgical technique is described.RESULTS: Of the 18 cases listed in the study, nine were males and nine females. Seventeen cases (94.5%) were diagnosed as primary tumoral lesions, one case (5.5%) presented with metastasis of a carcinoma, and an additional one had a fibrous dysplasia. Age ranged between 27 and 73 years. Early complications were developed in four cases, but all of these were completely resolved. None developed enophthalmos.CONCLUSION: The present study illustrates a novel surgical OBZ approach that allows for the performance of a simpler and faster procedure with fewer complications, and without increasing surgical time or cerebral manipulation, for reaching lesions of the middle fossa. Thorough knowledge of the anatomy and surgical technique is essential for successful completion of the procedure.

Clinical application of the modified scalp coronal incision in the treatment of zygomatic complex fractures / 中国耳鼻咽喉头颈外科

OBJECTIVE To explore the application of the modified scalp coronal incision in the treatment of zygomatic and zygomatic arch fracture, and analyze its prognosis. METHODS A retrospective analysis of 236 cases with zygomatic and zygomatic arch fracture from 2008 to 2016 was performed. They were treated with zygomatic and zygomatic arch fracture open reduction and firm fixation by the modified scalp coronal incision and postoperative mouse rehabilitation. After 3-6 months, the infection of incision, facial paralysis, occlusal, degree of mouth opening, facial deformity and subjective satisfaction index were followed up. The prognosis and recovery were evaluated. RESULTS 1. All of the patients had no postoperative incision infection, subcutaneous hematoma, temporal region sag, bald, and permanent facial paralysis. They all got satisfied face recovery. 2. All patients with occlusal disorders and limited mouth opening obtained functional occlusal and ideal degrees of mouth opening. Satisfaction was 97％. CONCLUSION The modified coronal scalp incision in the reconstruction of 3 d structure of zygomatic and zygomatic arch, has the advantages of a clear operation field and accurateresetting, good restoration of face, concealed scar. It contributes to the protection of the facial nerve and vascular structureand reduces the incidence of surgical complications.

Analysis on clinical effect of supratemporalis approach scalp coronal incision for treating craniomaxillofacial fracture / 重庆医学

Objective To investigate the effect of supratemporalis approach scalp coronal incision for treating craniomaxillofacial fracture.Methods Fifty-two cases of traditional coronal scalp approach were retrospectively analyzed for understanding the facial nerve damage situation.Then 30 cases a.dopted the supratemporalis approach scalp coronal incision and the facial nerve damage situation was recorded.The follow-up observation lasted for 6-24 months.Results The facial contour,mouth opening and occlusion function recovered well after the operation in all 82 cases.Eight cases of temporary facial nerve injury were observed in the traditional approach group.No case of facial nerve injury occurred in the supratemporalis approach group(P＜0.05).Conclusion The supratemporalis approach scalp coronal incision can effectively avoid the facial nerve injuries.

Modified Orbitozygomatic Approach without Orbital Roof Removal for Middle Fossa Lesions

OBJECTIVE: The purpose of the present study was to describe an OrBitoZygomatic (OBZ) surgical variant that implies the drilling of the orbital roof and lateral wall of the orbit without orbitotomy. METHODS: Design : cross-sectional study. Between January 2010 and December 2014, 18 patients with middle fossa lesions underwent the previously mentioned OBZ surgical variant. Gender, age, histopathological diagnosis, complications, and percentage of resection were registered. The detailed surgical technique is described. RESULTS: Of the 18 cases listed in the study, nine were males and nine females. Seventeen cases (94.5%) were diagnosed as primary tumoral lesions, one case (5.5%) presented with metastasis of a carcinoma, and an additional one had a fibrous dysplasia. Age ranged between 27 and 73 years. Early complications were developed in four cases, but all of these were completely resolved. None developed enophthalmos. CONCLUSION: The present study illustrates a novel surgical OBZ approach that allows for the performance of a simpler and faster procedure with fewer complications, and without increasing surgical time or cerebral manipulation, for reaching lesions of the middle fossa. Thorough knowledge of the anatomy and surgical technique is essential for successful completion of the procedure.

Zygomatic Mastoiditis with Extracranial Complications: An Extremely Rare Cause of Cheek Swelling / 대한이비인후과학회지

Zygomatic mastoiditis is an extremely rare cause of an inflamed, swollen cheek. We encountered a 10-year-old girl with left preauricular swelling, pain, and mild trismus. Temporal bone computed tomography revealed a zygomatic root abscess with bone defects and a scanty amount of soft tissue lesion in Prussak's space. After antibiotic therapy for 2 weeks, her pain subsided, but the swelling persisted. All inflamed air cells, including the lesion in the zygomatic root, were eradicated. The swelling subsided after the surgery. The patient has not experienced any postoperative complications or shown any evidence of relapse for more than 1 year.

Avaliação da satisfação de reabilitações com implantes zigomáticos / Satisfaction of rehabilitation with zygomatic implants

Introdução: A reabilitação oral de pacientes com atrofia óssea maxilar representa um grande desafio por estes pacientes apresentarem comprometimento da qualidade de vida, dificuldades alimentares, complicações nutricionais, dificuldades sociais e emocionais. Propostas de reabilitações de maxilas mutiladas e/ou atróficas com próteses totais fixas implantossuportadas, utilizando implantes zigomáticos, foram relatadas. Objetivo: O objetivo deste estudo foi avaliar o grau de satisfação dos pacientes reabilitados com implantes zigomáticos e convencionais, em função de carga imediata com prótese do tipo protocolo através de um estudo retrospectivo, por meio de questionário respondido pelos pacientes. Material e método: Foram incluídos dezenove pacientes, tratados na clínica do Instituto Latino Americano de Pesquisa e Ensino Odontológico (ILAPEO) em Curitiba, PR (Brasil), entre dezembro de 2005 e junho de 2010. Os pacientes foram reabilitados com 41 implantes zigomáticos e 73 implantes convencionais, todos do tipo cone Morse. As próteses, tipo híbridas, foram instaladas em carga imediata. Resultado: O índice de satisfação encontrado foi de 100%. Conclusão: Pode-se concluir que esta técnica de reabilitação restabelece fatores primordiais ao ser humano como mastigação, fonética e estética. Os pacientes relataram satisfação com o resultado do tratamento, conseguindo desenvolver atividades sociais dentro da normalidade, elevando sua autoestima.

Introduction: Rehabilitation of patients with atrophic maxilla is challenging. Atrophic maxilla patients present compromised quality of life, impaired function, deficient nutrition, social and emotional difficulties. The rehabilitation of atrophic maxilla by zygomatic fixtures has been previously proposed. Objective: This retrospective study evaluated the degree of satisfaction of patients rehabilitated by immediately loaded conventional and zygomatic fixtures supporting full-arch fixed dental prosthesis. A satisfaction questionnaire was used for patient assessment. Material and method: Nineteen patients treated at the Latin American Institute for Dental Research and Education (ILAPEO) between December 2005 and June 2010 were evaluated. Patients were rehabilitated with 41 zygomatic implants and 73 conventional implants under immediate load. Result: All assessed patients were completely satisfied with the provided rehabilitation. Conclusion: It can be concluded that rehabilitation with zygomatic fixtures is capable of restoring function, phonetics, and esthetic for patients with atrophic maxilla. The patients were satisfied with the treatment outcomes and showed increased self-esteem after the rehabilitation.