Late patient-fitted total orbital reconstruction for facial gunshot wound sequelae.

Late reconstructions of gunshot wounds (GSWs) in the orbital area are a true challenge to the oral and maxillofacial surgeon. Usually, the wall defects are large in size and commonly present loss of orbital volume, which can cause ocular dystopia. The only exceptions are when there is an explosion of the orbital walls-that is, blow-out fractures. We encountered a patient with a two-year sequelae after GSW in the face that caused the destructed orbit to have a 2.5 bigger size than the contralateral orbit, requiring meticulous planning of a patient-specific implant (PSI) to correctly reconstruct the orbit volume and bone projection. The PSI was developed using titanium and it had three pieces that could reconstruct all four walls of the orbit. After surgery, the patient regained orbital volume and malar projection, allowing him to benefit from facial symmetry. The PSI can be used to reconstruct all the orbital walls in cases of complex bone defects.

Transconjunctival Approach Using Lateral Skin Extension for Reconstruction of Orbit Zygomatic Complex Fractures: Technique Description and a Case Series Analysis.

STUDY DESIGN: A descriptive-observational study of a series case report of patients diagnosed with orbito-zygomatic complex (OZMC) fracture with lateral wall involvement, was conducted. All patients were assessed in the Oral and Maxillofacial Surgery Service at Hospital El Carmen, Maipu, Santiago, Chile. OBJECTIVE: The purpose of this study was to evaluate a single-institution experience with the transconjunctival approach to the orbit, utilizing a lateral skin extension as unique approach to access to fronto-zygomatic suture, infraorbital rim and/or orbital floor. METHOD: The authors identified 41 patients with OZMC fractures who underwent to surgical treatment over a 45 months period. Among this group, 21 patients needed fixation with osteosynthesis of the frontozygomatic suture, and 16 of whom were treated with the approach being studied. The authors assessed scleral exposure, eyelid position changes, ectropion, and entropion as outcome measures, and reported satisfactory outcomes at a minimum of 9 months follow-up. CONCLUSIONS: This study concludes that in our experience, the transconjunctival approach utilizing a lateral skin extension allows a direct, easy, and quick access to the entire infra orbital rim, orbital floor, fronto-zygomatic suture and lateral wall of the orbit, up to spheno-zygomatic suture, with low associated morbidity and complications.

Technological Integration of Virtual Surgical Planning, Surgical Navigation, Endoscopic Support and Patient-Specific Implant in Orbital Trauma.

Currently, we have different technologies and techniques that improve the results in orbital trauma. However, there are few studies that study the technological integration in orbital trauma and the synergism of all the techniques. For this reason, the objective of this case is to illustrate the management of orbital trauma by integrating endoscopic support, virtual surgical navigation, patient-specific implant, virtual surgical planning in the management of a sequel due to insufficient reconstruction of orbital volume.

[Enophthalmos secondary to an orbital varix]. / Enoftalmos unilateral por várice orbitaria.

The enophthalmos is a rare cause of consultation in medical practice. The majority of cases are due to orbital space enlargement of traumatic origin. We report the case of a 63 year old patient with progressive enophthalmos of the left eye, with twelve years of evolution. Ophthalmologic examination revealed the presence of a marked enophthalmos on the left side, which improved significantly with Valsalva maneuvers. A CT scan and an MRI of the orbit allowed diagnosing uncomplicated orbital varices. Orbital varices are rare and usually manifest by episodes of intermittent exophthalmos. However, on rare occasions, repeated distension and collapse can lead to progressive enophthalmos by orbital fat atrophy.

Enoftalmos unilateral por várice orbitaria / Enophthalmos secondary to an orbital varix

El enoftalmos es un motivo de consulta poco frecuente en la práctica médica. La mayor parte de los casos se debe a un aumento de la cavidad ósea orbitaria de origen traumático. Presentamos el caso de una mujer de 63 años que consultó por enoftalmos progresivo de su ojo izquierdo, de doce años de evolución. El examen oftalmológico reveló la presencia de un marcado enoftalmos del lado izquierdo, que mejoraba notablemente con maniobras de Valsalva. Una tomografía computarizada y una resonancia magnética de la órbita permitieron diagnosticar una várice orbitaria no complicada. Las várices orbitarias son infrecuentes y por lo general se manifiestan por episodios de exoftalmos intermitente. Sin embargo, en raras ocasiones, la distensión y colapso repetidos pueden llevar a un enoftalmos progresivo por atrofia de la grasa orbitaria.

The enophthalmos is a rare cause of consultation in medical practice. The majority of cases are due to orbital space enlargement of traumatic origin.We report the case of a 63 year old patient with progressive enophthalmos of the left eye, with twelve years of evolution. Ophthalmologic examination revealed the presence of a marked enophthalmos on the left side, which improved significantly with Valsalva maneuvers. A CT scan and an MRI of the orbit allowed diagnosing uncomplicated orbital varices. Orbital varices are rare and usually manifest by episodes of intermittent exophthalmos. However, on rare occasions, repeated distension and collapse can lead to progressive enophthalmos by orbital fat atrophy.

Enoftalmos unilateral por várice orbitaria / Enophthalmos secondary to an orbital varix

El enoftalmos es un motivo de consulta poco frecuente en la práctica médica. La mayor parte de los casos se debe a un aumento de la cavidad ósea orbitaria de origen traumático. Presentamos el caso de una mujer de 63 años que consultó por enoftalmos progresivo de su ojo izquierdo, de doce años de evolución. El examen oftalmológico reveló la presencia de un marcado enoftalmos del lado izquierdo, que mejoraba notablemente con maniobras de Valsalva. Una tomografía computarizada y una resonancia magnética de la órbita permitieron diagnosticar una várice orbitaria no complicada. Las várices orbitarias son infrecuentes y por lo general se manifiestan por episodios de exoftalmos intermitente. Sin embargo, en raras ocasiones, la distensión y colapso repetidos pueden llevar a un enoftalmos progresivo por atrofia de la grasa orbitaria.(AU)

The enophthalmos is a rare cause of consultation in medical practice. The majority of cases are due to orbital space enlargement of traumatic origin.We report the case of a 63 year old patient with progressive enophthalmos of the left eye, with twelve years of evolution. Ophthalmologic examination revealed the presence of a marked enophthalmos on the left side, which improved significantly with Valsalva maneuvers. A CT scan and an MRI of the orbit allowed diagnosing uncomplicated orbital varices. Orbital varices are rare and usually manifest by episodes of intermittent exophthalmos. However, on rare occasions, repeated distension and collapse can lead to progressive enophthalmos by orbital fat atrophy.(AU)

Remoção de corpo estranho em cavidade orbitária: Relato de caso / Removal of foreign bodies from the orbital cavity: a case report

A penetração de corpos estranhos na cavidade orbitária normalmente ocorre pelo trauma direto e penetrante. A depender da localização e da composição do corpo estranho, o diagnóstico pode ser feito por observação direta ou mediante exames de imagens. As radiografias convencionais, as ultrassonografias, as tomografias computadorizadas e a ressonância magnética são exames auxiliares no diagnóstico. Entretanto, a natureza de alguns corpos estranhos pode dificultar a sua identificação a despeito dos exames de imagem utilizados. A presença de corpos estranhos na cavidade orbitária pode resultar em celulites orbitárias, lesões oculares, lesões cutâneas adjacentes, amaurose, perda parcial da acuidade visual, entre outras complicações. O objetivo deste trabalho foi relatar um caso clínico de uma paciente, 17 anos de idade, feoderma, agredida com um pedaço de madeira, diretamente sobre a órbita esquerda. A paciente evoluiu com celulite orbitária refratária à antibioticoterapia e perda da acuidade visual do olho esquerdo. A radiografia de face não revelou a presença de corpos estranhos. Na tomografia computadorizada das cavidades orbitárias, observou-se, na órbita esquerda, imagens com densidade semelhante a ar. A paciente foi, então, submetida à cirurgia exploratória, sob anestesia geral, no Hospital Municipal Miguel Couto /RJ, e nela inúmeros fragmentos de madeira foram removidos, evoluindo com remissão do processo infeccioso.

The intrusion of foreign bodies into the orbital cavity usually occurs through direct and penetrating trauma. Depending on the location and composition of the foreign body, the diagnosis can be made by direct observation or by the analysis of imaging studies. Conventional radiography, ultrasound, CAT scans and MRI are used as auxiliary investigations in the diagnosis. However, the nature of some foreign bodies can make their identification difficult, even with the use of imaging techniques. The presence of foreign bodies in the orbital cavity may result in orbital cellulitis, eye lesions, adjacent skin lesions, blindness, partial loss of visual acuity, among other complications. The aim of this study was to report the clinical case of a female dark-skinned patient, aged 17, injured by a piece of wood directly onto her left orbit. The patient developed orbital cellulitis, which was unresponsive to conventional antibiotic therapy, and loss of visual acuity. Radiography of the face did not reveal the retention of any foreign bodies. Computed tomography of the orbital cavity revealed images with a density similar to that of air were observed. The patient underwent exploratory surgery under general anesthesia at Hospital Miguel Couto - RJ, resulting in the removal of many wood fragments from the orbital cavity and the resulting remission of the infectious process.

Tissue repair after orbital reconstruction using polypropylene mesh implants: A histological study in dogs / Reparo tecidual após reconstrução de órbita com implante de malha de polipropileno: um estudo histológico em cães

Purpose: This experimental study aimed to assess the histological outcomes of orbit reconstruction with a polypropylene mesh implant in an animal model using dogs. Methods: The right and left orbits of 12 dogs were fractured in order to simulate orbital fractures similar to those occurring in humans as a result of trauma. The orbits were reconstructed with a polypropylene mesh positioned approximately 10 mm beyond the bone defect borders. The 24 orbits were divided into four groups of six: one group was given one polypropylene mesh layer; another group received two layers; a third group was given three polypropylene mesh layers; and the fourth group did not receive any implant (control group). The dogs were divided into clusters of four animals and were euthanized 15, 30, or 60 days after the surgery. The orbit medial wall was removed, and samples were subjected to histological polypropylene mesh analysis by optical microscopy. Data were analyzed using a non-parametric test with a 5% level of significance. Results: It was found that the polypropylene mesh caused a mild to moderate tissular reaction. Conclusion: The implant was well tolerated even with two or three overlapping layers.

Objetivo: Trata-se de estudo experimental em que se reconstruíram os continentes orbitais de 12 cães com implante de tela de polipropileno. Metodologia: Os continentes orbitais foram fraturados simulando as fraturas orbitais que ocorrem em humanos devido ao trauma e reconstruídas com tela de polipropileno cortadas com extensão de cerca de 10mm além da margem do defeito ósseo. Utilizaram-se uma, duas ou três camadas de tela de polipropileno nas órbitas teste e algumas órbitas, somente fraturadas, serviram como controle. Os cães foram sacrificados nos tempos de 15, 30 e 60 dias de pós-operatório; os tecidos das órbitas teste e controle foram removidos e preparados para análise histológica em microscopia óptica. Os resultados obtidos pela análise histológica foram submetidos a análise estatística não paramétrica com 5% de significância. Resultados: A tela de polipropileno causou reação tecidual de leve a moderada nos tecidos. Conclusão: O implante foi bem tolerado, mesmo quando a tela foi superposta em duas ou três camadas.