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Silent sinus syndrome is a rare clinical entity affecting the maxillary sinus, characterized by ipsilateral enophthalmos and hypoglobus. Its etiology and pathophysiology are still debated. It is diagnosed by clinical examination and confirmed with computed tomography. It is commonly managed surgically. We present the case of a 34-year-old woman with silent sinus syndrome treated with a patient-specific implant for orbital reconstruction, functional endoscopic sinus surgery approach, intraoperative scan, and surgical navigation, successfully restoring orbital volume and sinus ventilation.

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Zygomaticomaxillary complex and isolated orbital walls fractures are one of the most common fractures of the midface, often presenting orbital symptoms and complications. Our study was born with the aim of understanding the trend in the incidence of orbital presurgical symptoms, specifically diplopia, enophthalmos and exophthalmos, in the Campania Region in southern Italy. We conducted a retrospective, monocentric observational study at the Maxillofacial Surgery Unit of the Federico II University Hospital of Naples, enrolling 402 patients who reported a fracture of the zygomaticomaxillary complex and orbital floor region from 15 June 2021 to 15 June 2022. Patients were evaluated by age, gender, etiology, type of fracture, preoperative orbital side effects and symptoms. Pre-surgical side effects were studied, and 16% of patients (n = 66) developed diplopia. Diplopia was most common in patients previously operated on for orbital wall fractures (100%), and least common in patients who reported trauma after interpersonal violence (15%) and road traffic accidents (11%). Exophthalmos appeared only in 1% (six cases); whereas it did not appear in 99% (396 cases). Enophthalmos was present in 4% (sixteen cases), most commonly in interpersonal violence cases (two cases). The frequency of orbital complications in patients with zygomaticomaxillary complex and isolated orbital walls fractures suggests how diplopia remains the most common pre-surgical orbital side effect.

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If eyelid and orbital surgery is very often particularly rewarding, it can also be deceiving. Moreover, a dysfunction can be added to the aesthetic result, leading to a secondary surgery. Secondary surgeries at the orbital level will mainly relate to problems of volume (container - content), whereas at the eyelid level, it will be problems of position that will be met. These eyelids wrong positionings result from an imbalance of dynamic forces that could have preexisted to the first surgery or is a consequence of that surgery. And it's the clinical trial that will be key, allowing the prevention of complications in the first surgery and that in secondary surgery will do for the diagnostic and will lead to the repairing operation. Several examples will be presented and discussed.

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The aim of the study was the assessment of safety of posttraumatic orbital defect correction with bone autografts. The study comprised 69 patients divided in 2 groups: 21 patients with isolated orbital floor and medial wall deformities and 48 patients with complex midface injuries. Membranous bone autografts were used for deformities correction along with soft tissues hypercorrection with a mix of bone chips and platelet rich plasms. The paper presents diagnostic algorithm for orbital trauma patients. Correction of complex midfacial injuries in group 2 resulted in restricted ocular mobility and increase in diplopy square. Subciliary approach caused lower lid retraction deteriorating esthetic results of the surgery. Ocular vessels hemodynamics showed improvement 1 year after surgery.

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Introducción: el Síndrome de Seno Silente (SSS) es una entidad rara, siendo poco frecuente el hundimiento del maxilar superior como motivo de consulta. El trabajo pretende realizar una revisión de la bibliografía del SSS con el hundimiento del maxilar superior como principal manifestación. Material y método: Se realizó una revisión bibliográfica de artículos publicados desde el año 2008 a la actualidad. Se revisaron las historias clínicas de los pacientes diagnosticados con SSS, intervenidos quirúrgicamente. Como criterios diagnósticos se tuvieron en cuenta: asimetría facial, ausencia de síntomas rinosinusales, tomografía de macizo cráneo facial (TC MCF) con velamiento del seno maxilar y disminución de su volumen, y aumento del volumen orbitario. Se evaluó el seguimiento postoperatorio y sus resultados. Resultados: El SSS se debe a un proceso inflamatorio en el seno maxilar que genera aumento de las presiones negativas. Clínicamente se caracteriza por asimetría facial. El diagnóstico se confirma por tomografía, siendo lo más característico la presencia, en el plano coronal, de un seno maxilar ocupado y atelectásico y el descenso del piso orbitario con disminución del volumen del mismo y aumento del volumen de la órbita. El tratamiento quirúrgico se basa en mejorar las presiones dentro del seno maxilar, reservando el tratamiento del piso de la órbita a aquellos pacientes en los que persisten las alteraciones estéticas. Conclusiones: La asimetría facial es el principal motivo de consulta del paciente. Sin embargo el hundimiento del seno maxilar no es la causa más frecuente de asimetría.

Introduction: silent Sinus Syndrome (SSS) is a rare entity, and the subsidence of the upper jaw is rare. The paper aims to review the SSS literature with the upper jaw collapse as the main manifestation. Material and method: A bibliographic review of articles published from the year 2008 to the present time was carried out. Were viewed the medical records of patients diagnosed with SSS, whounder went surgery. As diagnostic criteria were taken into account: facial asymmetry, absence of rhinosinusal symptoms, massive facial cranial tomography with maxillary sinus veil and diminished volume, and increased orbital volume. Postoperative follow-up and results were evaluated. Results: The SSS is due to an inflammatory process in the maxillary sinus that generates an increase of the negative pressures. Clinically it is characterized by facial asymmetry. The diagnosis is confirmed by tomography being the most characteristic the presence, in the coronal plane, of a occupied maxillary sinus and atelectatic and the descent of the orbital floor with decrease of the volume of the same and increase of the volume of the orbit. The surgical treatment is based on improving the pressure inside the maxillary sinus, reserving the treatment of the floor of the orbit to those patients who persist the aesthetic alterations. Conclusions: Facial asymmetry is the main reason for patient consultation. However, sagging of the maxillary sinus is not the most frequent cause of asymmetry.

Introdução: síndrome do Sinus Silencioso (SSS) é uma entidade rara, e o maxilar inferior não é freqüente como motivo de consulta. O artigo pretende rever a literatura SSS com o colapso do maxilar superior como principal manifestação. Material e método: Foi realizada uma revisão bibliográfica de artigos publicados de 2008 para o presente. Revisamos os registros médicos de pacientes diagnosticados com SSS, que foram submetidos a cirurgia. Como critérios de diagnóstico foram tidos em conta: assimetria facial, ausência de sintomas rinossinusais, tomografia craniana facial maciça com velamento maxilar superior e volume diminuído e aumento do volume orbital. O acompanhamento pós-operatório e os resultados foram avaliados. Resultados: SSS é devido a um processo inflamató- rio no seio maxilar que gera um aumento nas pressões negativas. Clinicamente, é caracterizada por assimetria facial. O diagnóstico é confirmado pela tomografia sendo a mais característica a presença, no plano coronal, de um seio maxilar ocupado e atelectásico e a descida do piso orbital com diminuição do volume do mesmo e aumento do volume da órbita. O tratamento cirúrgico baseia-se na melhoria da pressão dentro do seio maxilar, reservando o tratamento do piso da órbita aos pacientes que persistem as alterações estéticas. Conclusões: A assimetria facial é o principal motivo para a consulta do paciente. No entanto, a flacidez do seio maxilar não é a causa mais frequente de assimetria.

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CLINICAL CASE: A 53 year-old man presented with a progressive enophthalmos without any sinus or nasal symptoms. There was no history of a trauma. The ophthalmology examination showed enophtalmos and hypoglobus. The computerized tomography (CT) showed a collapsed maxillary and frontal sinus and a lateral deviation of the nasal septum that led us to the diagnosis. DISCUSSION: The clinical features of silent sinus syndrome are described, as well as the need to distinguish it from maxillary sinusitis.

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Enophthalmos is a common result of blow out fracture of the orbit. Prior to CT volume analysis no reliable measurement of the degree of bony and soft tissue deformity was available to identify patients who would develop enophthalmos. Evaluation of orbital volume expansion and volume expansion percentage were performed in 23 patients with blow out fracture, after 1-4 days of injury. All studies were performed on a CT (Somatom Plus, Germany, Siemens), using transaxial scan technique(140 kVp, 206 mA, 3 mm contiguous sections). The radiological boundaries of the orbit were defined anteriorly by a line mrrecting the anterior surface of the zygomaticofrontal process to the nasomaxillary suture and posteriorly to the optic foramen. The Hounsfield Unit(HU) ranges were -100 to 0 and 0 to +100. It is difficult to distinguish blood from fat in the orbital volume measurement. We used three methods to obtain more accurate orbital volume. First, The concave margin or the air meniscus surface area is blood and the convex margin area is fat. Second, It can be distingushed blood from fat by Hounsfield Unit of specific area pixel. Third, The homogenous area is blood and inhomogenous area is fat or mixture of fat and blood. The patients(> or =13% orbital volume expansion) are managed surgically. 15 patients were classified in operative group and 8 patients were in conservative treatment group. The volume expansion percentage is 12.7% to 28.8% in operative group and 4.2% to 11.2% in conservative group. There was no enophthamos in each groups after 3 months of operation and injury. CT measurements of orbital volume expansion and volume expansion percentage can predict the final degree of the late enophthalmos and may facilitate the planning of surgical intervention. To obtain more accurate prediction of enophthalmos, we consider not olny volume expansion but also volume expansion percentage, because everyone doesn't have the same normal orbital volume.

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The purpose of this study was to determine whether orbital volume assessment by CT could provide additional information for the initial evaluation of orbital blowout fractures and guide optimal treatment. The medical records of 26 patients with orbital blowout fractures, either surgically or conservatively managed, were retrospectively reviewed. Orbital volumetric analysis was then determined from digitized CT scans. Fracture-related volume expansion relative to the unaffected fellow orbit was correlated with degree of enophthalmos. Early Hertel's measurements[4 weeks] were obtained in 13 nonrepaired fractures and in 3 of 13 surgically repaired patients[late presentation;16 patients]. When seen at more than 4 weeks, 4[80%] of 5 patients with> OR =13% orbital volume expansion manifested significant enophthalmos[>2 mm] compared with 2[18.2%] of 11 patients with<13% orbital expansion[p<0.01]. CT measurements of orbital volume can predict the final degree of late enophthalmos and may facilitate the planning of surgical intervention.

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