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orbital reconstruction

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https://www.readbyqxmd.com/read/29337012/expanding-the-limits-of-endoscopic-intraorbital-tumor-resection-using-3-dimensional-reconstruction
#1
Luciano Lobato Gregorio, Nicolas Y Busaba, Marcel M Miyake, Suzanne K Freitag, Benjamin S Bleier
INTRODUCTION: Endoscopic orbital surgery is a nascent field and new tools are required to assist with surgical planning and to ascertain the limits of the tumor resectability. OBJECTIVE: We purpose to utilize three-dimensional radiographic reconstruction to define the theoretical lateral limit of endoscopic resectability of primary orbital tumors and to apply these boundary conditions to surgical cases. METHODS: A three-dimensional orbital model was rendered in 4 representative patients presenting with primary orbital tumors using OsiriX open source imaging software...
December 26, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29329172/clinical-features-and-outcomes-of-post-traumatic-silent-sinus-syndrome
#2
Edward J Wladis, Robert C Kersten, M Reza Vagefi, Carlos Pinheiro-Neto, Roman Shinder, H Jane Kim
PURPOSE: To identify demographic features and clinical outcomes associated with post-traumatic silent sinus syndrome. METHODS: A retrospective review was carried out at 3 academic medical centers to identify all cases of post-traumatic silent sinus syndrome. Clinical features and management strategies were recorded. Postoperative outcomes were assessed, and statistical analyses were performed via a dedicated computerized software package. RESULTS: Twenty cases were identified (14 men and 6 women, mean age = 44...
January 10, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29317363/spheno-orbital-meningiomas-surgery-multicenter-management-study-for-complex-extensive-tumors
#3
Louis-Marie Terrier, Florian Bernard, Henri-Dominique Fournier, Xavier Morandi, Stéphane Velut, Pierre-Louis Hénaux, Aymeric Amelot, Patrick François
BACKGROUND: Spheno-orbital meningiomas (SOMs) are complex tumors involving the sphenoid wing, the orbit, and sometimes the cavernous sinus with bone hyperostosis and sheet-like dural involvement. Optimal removal, proptosis cure and visual preservation remain a challenge. OBJECTIVE: To study the management of surgically treated SOMs METHODS: The clinical records of 130 consecutive patients undergoing surgery for SOMs were retrospectively collected in a database during a 20-year period to analyze symptoms, surgical technique, clinical outcome, and follow-up...
January 6, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29310408/case-report-repairing-orbital-skin-defects-using-composite-flaps-after-giant-eyelid-derived-tumor-excision-and-orbital-exenteration
#4
Bin Fan, Jian-Ju Liu, Bei-Fen Wang, Ying-Jian Sun, Guang-Yu Li
RATIONALE: Though giant malignant tumors arising in the eyelid are rare, they often require extensive surgery for removal along with orbital exenteration. Because of this, repairing orbital defects is an important factor in the surgical strategy. PATIENT CONCERNS: Case 1 was a 78-year-old nomad man who presented in the Department of Ophthalmology with a giant tumor in his right eyelid, which had developed over three years. Clinical examination revealed a huge pigmented, nonhealing ulcerated lesion, approximately 52×44×40 mm in size...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29300514/surgical-preferences-in-the-management-of-recalcitrant-endophthalmitis
#5
Roxana Fu, Joseph Childs, William Nunery, Peter Timoney
To assess the practice patterns of current members of the American Society of Ophthalmic Plastic and Reconstructive Surgery (ASOPRS) in the treatment of medically refractive endophthalmitis (MRE). A 17-question survey included the procedure of choice for MRE, the preferred type of orbital implant, the timing of implant placement, and the incidence of postoperative complications. 107 ASOPRS members participated in the study. In the setting of MRE, 72% preferred evisceration versus 28% who preferred enucleation...
January 4, 2018: Orbit
https://www.readbyqxmd.com/read/29283945/computer-assisted-volumetric-analysis-and-quantitatively-anophthalmic-orbit-reconstruction-with-dorsalis-pedis-flap-and-bone-graft
#6
Li-Ying Cheng, Wei-Wei Bian, Xiao-Ming Sun, Zhe-Yuan Yu, Ying Zhang, Lu Zhang, Yu-Guang Zhang, Rong Jin
Current approaches to orbit reconstruction are based on the assumption of facial symmetry and surgeons' experiences, and the reconstructed orbits are not precise. Through computer-assisted volumetric quantitative analysis, the volume of the bony orbit, and the volume of the soft tissues in both the anophthalmic orbit and the contralateral orbit are calculated in 39 anophthalmic patients. The rib graft is used for orbit reconstruction; the dosalis pedis flap and lipo-injection were used for soft tissue reconstruction and skin socket reconstruction...
December 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29283944/a-giant-osteoma-of-the-ethmoid-sinus
#7
Tatsuyuki Ishii, Yoshiaki Sakamoto, Tomoru Miwa, Kazunari Yoshida, Kazuo Kishi
Osteomas are slow-growing, benign bony tumors. Most are asymptomatic. Paranasal sinus osteoma in the pediatric population is rare; hence, there are few reports of symptomatic osteomas. The authors report the case of a giant ethmoid sinus osteoma in an 11-year-old girl who presented with diplopia and proptosis. Total excision and reconstruction of the medial orbital wall were performed via a coronal approach. The postoperative period was uneventful, the child's vision improved, and a good cosmetic result was obtained...
December 27, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29283508/the-lack-of-nasolacrimal-ducts-in-plethodontid-salamanders
#8
Dustin S Siegel, Michael S Taylor, David M Sever, Stanley E Trauth
Nasolacrimal ducts are a terrestrial vertebrate adaptation and appear to have co-evolved with orbital glands. Although plethodontid salamanders possess orbital glands, a recent study concluded that plethodontid salamanders lack nasolacrimal ducts. Functionally, the absence of nasolacrimal ducts closes the route for orbital gland secretion passage into the nasal and vomeronasal organ cavities. Orbital glands have been implicated in enhancement of vomeronasal function so loss could have important implications for communication...
December 28, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29275554/-estimation-of-external-features-of-eyes-for-the-adult-male-of-han-nationality-in-northeast-china-based-on-the-characteristics-of-skull
#9
G Y Xu, L Tian, J H Zhang
OBJECTIVES: To explore the correlation between the imaging parameters of skull and the external features of eyes. METHODS: Positive images of the head face and the frontal and lateral X-ray films were obtained from 101 cases of adult males of the Han nationality aged from 20 to 40 years old in Northeast China. The face width (x₁), upper face width (x₂), biorbital width (x₃), all facial height (x₄), upper facial height (x₅), maximum breadth of skull (x₆), minimum breadth of frontal bone (x₇), orbital widthⅡ(x₈), anterior interorbital breadth (x₉), maximum height of skull (x₁₀), minimum width of nasal bone (x₁₁) and orbital height (x₁₂) were measured and the data were statistically analysed...
October 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29275073/orbital-volume-and-shape-in-treacher-collins-syndrome
#10
Julie Levasseur, Johan Nysjö, Ronak Sandy, Jonathan A Britto, Nicolas Garcelon, Samer Haber, Arnaud Picard, Pierre Corre, Guillaume A Odri, Roman H Khonsari
Orbito-palpebral reconstruction is a challenge in Treacher Collins syndrome (TCS). This study investigates orbital phenotypes in TCS using cephalometry and orbital shape analysis. Eighteen TCS and 52 control patients were included in this study, using the Dr Warehouse database. Orbital cephalometry was based on 20 landmarks, 10 planes, 16 angles, and 22 distances. Orbits were segmented. Registration-based, age-specific mean models were generated using semi-automatic segmentation, and aligned and compared using color-coded distance maps - mean absolute distance (MAD), Hausdorff distance (HD), and Dice similarity coefficient (DSC)...
December 8, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29234230/traumatic-eye-ball-luxation-a-stepwise-approach-to-globe-salvage
#11
Himika Gupta, Srivalli Natarajan, Sushrut Vaidya, Shipra Gupta, Dinesh Shah, Raj Merchant, Shrikant Deshpande
Craniofacial trauma is often associated with orbital and ocular injuries. We report a case of a 21-year-old male with motor vehicular accident, orbital roof blow-in fracture, cerebrospinal fluid (CSF) leak, and left sided globe luxation with corneal abrasion and complete conjunctival denuding. The patient was managed by a multispeciality team and the eyeball was protected by amniotic membrane graft (AMG) biological dressing with novel use of inverted sterile metallic bowl as mechanical protection till the patient stabilized...
October 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/29233702/endoscopic-endonasal-repair-with-polyethylene-implants-in-medial-orbital-wall-fractures-a-prospective-study-on-25-cases
#12
Giacomo Colletti, Alberto Maria Saibene, Lorenzo Giannini, Margherita Dessy, Carlotta Pipolo, Fabiana Allevi, Paolo Lozza, Giovanni Felisati, Federico Biglioli
The aim of the study was to assess the mid-term effectiveness and safety of an original technique consisting of reconstructing fractures of the medial wall of the orbit with porous polyethylene implants with an exclusive transnasal approach. Twenty-five patients were treated. Each patient underwent a pre-operative ophthalmologic evaluation and a CT scan. The surgery started with an anteroposterior ethmoidectomy of the fractured side; all the fractured bone fragments were removed and all usual landmarks of healthy bony margins were identified...
November 21, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29233510/patient-specific-puzzle-implant-preformed-with-3d-printed-rapid-prototype-model-for-combined-orbital-floor-and-medial-wall-fracture
#13
Young Chul Kim, Kyung Hyun Min, Jong Woo Choi, Kyung S Koh, Tae Suk Oh, Woo Shik Jeong
BACKGROUND: The management of combined orbital floor and medial wall fractures involving the inferomedial strut is challenging due to absence of stable cornerstone. In this article, we proposed surgical strategies using customized 3D puzzle implant preformed with Rapid Prototype (RP) skull model. METHODS: Retrospective review was done in 28 patients diagnosed with combined orbital floor and medial wall fracture. Using preoperative CT scans, original and mirror-imaged RP skull models for each patient were prepared and sterilized...
November 29, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29214979/angular-dependent-magnetoresistance-study-in-ca0-73la0-27feas2-a-parent-compound-of-112-type-iron-pnictide-superconductors
#14
Xiangzhuo Xing, Chunqiang Xu, Zhanfeng Li, Jiajia Feng, Nan Zhou, Yufeng Zhang, Yue Sun, Wei Zhou, Xiaofeng Xu, Zhixiang Shi
We report a study of angular-dependent magnetoresistance (AMR) with the magnetic field rotated in the plane perpendicular to the current on a Ca0.73La0.27FeAs2 single crystal, which is regarded as a 'parent' compound of 112-type iron pnictide superconductors. A pronounced AMR with twofold symmetry is observed, signifying the highly anisotropic Fermi surface. By further analyzing the AMR data, we find that the Fermi surface above the structural/antiferromagnetic (AFM) transition (T s/T N) is quasi-two-dimensional (quasi-2D), as revealed by the 2D scaling behavior of the AMR, Δρ/ρ(0) (H, θ)  =  Δρ/ρ(0) (µ 0 Hcosθ), θ being the magnetic field angle with respect to the c axis...
December 7, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29195722/autologous-dermis-fat-grafts-as-primary-and-secondary-orbital-transplants-before-rehabilitation-with-artificial-eyes
#15
Sven Holger Baum, Claus Schmeling, Roman Pförtner, Christopher Mohr
OBJECTIVE: The aim of this study was to examine the role of autologous dermis-fat grafts in the reconstruction of orbital soft-tissue defects. PATIENTS: Thirty-six patients (3-84 years) were enrolled in this retrospective study from 2002 to 2014. The dermis-fat graft was primarily transplanted in seven cases, and secondarily in 29 patients. All the patients were evaluated for complications, adequate prosthetic cavity, possibility of artificial eye supply and movement, as well as cosmetic results...
October 26, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29188648/-application-of-bone-grafts-from-chin-of-the-mandible-in-the-reconstruction-of-orbital-fracture
#16
Li Xiaoyu, Wu Jing, Du Xinya, Huang Jian, Wu Bin, Xie Chun
OBJECTIVE: To evaluate the clinical effects of bone graft from the mandible in repairing orbital floor defects. METHODS: Bone grafts from the mandible were used to treat 11 cases of orbital floor defects and followed up for 6-12 months. RESULTS: The surgical incisions healed primarily in all 11 patients. The orbital floor structure was restored. No vision loss, limited eye movement, implant infection, or resorption were observed postoperatively, and no complications occurred in the supply area...
October 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29174553/primary-aesthetic-correction-of-nasal-anomaly-with-costal-graft-in-treating-orbital-hypertelorism
#17
Dong Li, Haoli Mao, Zheyuan Yu, Liang Xu, Jie Yuan, Min Wei
Orbital hypertelorism is a common congenital craniofacial anomaly in Asians. As Tessier pointed out, the correction of hypertelorism is effectively the correction of the nasal deformity, which is characterized by a broad, flat nose accompanying an increased interorbital distance and a lack of nasal projection. OBJECTIVES: To measure the changes in the orbital and nasal parameters after Tessier box osteotomy and primary aesthetic rhinoplasty, performed concurrently with otogenous costochondral graft...
October 13, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29166653/testing-the-applicability-of-a-benthic-foraminiferal-based-transfer-function-for-the-reconstruction-of-paleowater-depth-changes-in-rhodes-greece-during-the-early-pleistocene
#18
Yvonne Milker, Manuel F G Weinkauf, Jürgen Titschack, Andre Freiwald, Stefan Krüger, Frans J Jorissen, Gerhard Schmiedl
We present paleo-water depth reconstructions for the Pefka E section deposited on the island of Rhodes (Greece) during the early Pleistocene. For these reconstructions, a transfer function (TF) using modern benthic foraminifera surface samples from the Adriatic and Western Mediterranean Seas has been developed. The TF model gives an overall predictive accuracy of ~50 m over a water depth range of ~1200 m. Two separate TF models for shallower and deeper water depth ranges indicate a good predictive accuracy of 9 m for shallower water depths (0-200 m) but far less accuracy of 130 m for deeper water depths (200-1200 m) due to uneven sampling along the water depth gradient...
2017: PloS One
https://www.readbyqxmd.com/read/29165415/-the-potential-of-ectoprosthetics-in-rehabilitation-of-patients-with-orbital-pathology
#19
E N Verigo, I A Filatova, O N Tkachenko
AIM: rectification of indications and contraindications for ectoprosthetics and exploration of its potential as a modern rehabilitation modality. MATERIAL AND METHODS: Here are summarized the results of 89 cases of facial reconstruction with prosthetic means in trauma patients and those who had had congenital or oncological pathology and in whom other methods of rehabilitation were unable to remedy the defect within the orbital region. RESULTS: The indications and contraindications for facial prosthetics as well as the conditions, under which this type of medical and social rehabilitation can be carried out, were clarified...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29160242/angular-dependent-magnetoresistance-study-in-ca-sub-0-73-sub-la-sub-0-27-sub-feas-sub-2-sub-a-i-parent-i-compound-of-112-type-iron-pnictide-superconductors
#20
Xiangzhuo Xing, Chunqiang Xu, Zhanfeng Li, Jiajia Feng, Nan Zhou, Yufeng Zhang, Yue Sun, Wei Zhou, Xiaofeng Xu, Zhixiang Shi
We report a study of angular-dependent magnetoresistance (AMR) with the magnetic field rotated in the plane perpendicular to the current on a Ca<sub>0.73</sub>La<sub>0.27</sub>FeAs<sub>2</sub> single crystal, which is regarded as a "<i>parent</i>" compound of 112-type iron pnictide superconductors. A pronounced AMR with twofold symmetry is observed, signifying the highly anisotropic Fermi surface. By further analyzing the AMR data, we find that the Fermi surface above the structural/antiferromagnetic (AFM) transition (<i>T</i><sub>s</sub>/<i>T</i><sub>N</sub>) is quasi-two-dimensional (2D), as revealed by the 2D scaling behavior of the AMR, Δρ/ρ(0) (<i>H</i>, θ)=Δρ/ρ(0) (μ<sub>0</sub><i>H</i>cos<i>θ</i>), <i>θ</i> being the magnetic field angle with respect to the c axis...
November 21, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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