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https://www.readbyqxmd.com/read/28526645/carotid-falciform-optic-neuropathy-microsurgical-treatment
#1
M Neil Woodall, Cargill H Alleyne
BACKGROUND: Several recent reports have implicated vascular ectasia and vessel contact with dysfunction of the visual apparatus. A subset of patients with pre-chiasmatic visual deterioration have an ectatic internal carotid artery (ICA) that displaces and flattens the optic nerve (ON) rostrally as the ON exits the skull base. We will offer a proposed pathophysiological mechanism and describe a straightforward surgical technique for dealing with this interesting problem. METHODS: Via an ipsilateral pterional craniotomy, the bony roof of the optic canal is removed...
May 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28516966/expanded-transcanal-transpromontorial-approach-to-the-internal-auditory-canal-and-cerebellopontine-angle-a-cadaveric-study
#2
L Presutti, M Bonali, D Marchioni, G Pavesi, A Feletti, L Anschuetz, M Alicandri-Ciufelli
The aim of this paper is to describe and evaluate the feasibility of an expanded endoscopic transcanal transpromotorial approach (ExpTTA) to the internal auditory canal and the cerebellopontine angle. To this end, we performed a cadaveric dissection study in September 2015. In total, 2 heads (4 sides) were dissected focusing on anatomical landmarks and surgical feasibility. Data from dissections were reviewed and analysed for further consideration. In all 4 sides of the cadavers the procedure was feasible. In all cadavers, it was necessary to extensively drill the temporo-mandibular joint and to calibrate the external ear canal to allow adequate room to manoeuver the instruments and optics and to comfortably access the cerebellopontine angle...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28483236/the-prevalence-of-the-onodi-cell-most-suitable-method-of-ct-evaluation-in-its-detection
#3
L P Chmielik, A Chmielik
BACKGROUND: The Onodi cell (sphenoethmoidal air cell) is an anatomic variant of the most posterior ethmoid cell that pneumatised superiorly and laterally to the sphenoid sinus, and is in close relation to the optic nerve. The proper identification of the Onodi cell is essential during a pre-operative computer tomography (CT) examination, as the presence of that ethmoid cell variant makes sphenoid sinus surgery more risky. The bulging of the optic nerve to the ethmoid cell wall is well visualized during endoscopic examination, but there are no clearly defined criteria for a potentially dangerous Onodi cell type in CT examinations...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28474186/sphenoorbital-meningioma-surgical-series-and-design-of-an-intraoperative-management-algorithm
#4
Lior Gonen, Eytan Nov, Nir Shimony, Ben Shofty, Nevo Margalit
Current surgical removal of sphenoorbital meningiomas (SOM) mainly aims at reduction of proptosis and restoration of visual function; some stages of the surgical technique are controversial. In this study, we aim to present a surgical decision-making algorithm for SOM. A retrospective study of 27 patients who underwent resection of SOM in our center (2005-2014) was conducted. The primary outcomes evaluated were postoperative visual function and radiological exophthalmos. In our study, clinical proptosis was the most common presenting sign (92%), followed by visual loss (37%)...
May 4, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28455115/reduced-free-communication-of-the-subarachnoid-space-within-the-optic-canal-in-the-human
#5
Mikee Liugan, Zhaoyang Xu, Ming Zhang
PURPOSE: Recent studies in patients demonstrated that cerebrospinal fluid does not flow continuously between the intracranial subarachnoid space (SAS) and the space around the optic nerve in the orbit. Its anatomical basis remains elusive. The objective of this study was to use a novel anatomical technology, the epoxy sheet plastination, to reveal the configuration of the fibrous structures within the optic canal and their relationship with the optic nerve, SAS and ophthalmic artery. DESIGN: A human cadaveric study...
April 25, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28440591/imaging-collector-channel-entrance-with-a-new-intraocular-micro-probe-swept-source-optical-coherence-tomography
#6
Chen Xin, Xiaoya Chen, Meng Li, Yan Shi, Huaizhou Wang, Ruikang Wang, Ningli Wang
PURPOSE: To describe the use of a newly developed side-viewing catheter probe to provide the cross-sectional images of collector channel entrance (CCE), achieved by swept-source optical coherence tomography (SS-OCT). METHODS: A side-viewing SS-OCT catheter probe was developed that has a core probe diameter of 0.15 mm and an outer diameter of 0.25 mm, for the purpose of imaging CCEs within eye globe. Cadaver eyes harvested from swine and human were used to demonstrate its feasibility...
April 25, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28437265/unilateral-blindness-after-septoplasty
#7
Ahmet Erdem Kilavuz, Duzgun Yildirim, Gediz Murat Serin, Asim Kaytaz
Septoplasty is a frequently performed procedure with mostly minor complications. Nevertheless, it may lead to serious complications.The authors present a 29-year-old patient admitted to their hospital 10 days after septoplasty in another institution. He suffered a total loss of vision immediately after the surgery.High-resolution computed tomography and magnetic resonance imaging revealed a direct trauma of the optic canal and an inflamed and edematous optic nerve. Even though a successful endoscopic optic nerve was performed, the patient's loss of vision did not improve after the surgery...
April 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28435366/comparative-evaluation-of-antimicrobial-efficacy-of-triple-antibiotic-paste-calcium-hydroxide-and-a-proton-pump-inhibitor-against-resistant-root-canal-pathogens
#8
Shibha Mehta, Promila Verma, Aseem Prakash Tikku, Anil Chandra, Rhythm Bains, Gopa Banerjee
OBJECTIVE: The objective of this study is to compare the antimicrobial efficacy of triple antibiotic paste (TAP) and a proton pump inhibitor (PPI) (omeprazole) in combination with calcium hydroxide (CH) against Enterococcus faecalis and Candida albicans. MATERIALS AND METHODS: E. faecalis and C. albicans were subcultured and inoculated at 37° overnight and were treated with different dilutions of TAP, 25 μg/ml (Group 1), CH (Group 2, control), CH 16 mg/ml + omeprazole 2 mg/ml (Group 3a) (CH 16 mg/ml + omeprazole 4 mg)/ml (Group 3b) for 24, 48, and 72 h in sterile uncoated 96-well microtiter plates...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28416309/detection-of-apical-root-cracks-using-spectral-domain-and-swept-source-optical-coherence-tomography
#9
Bruna Paloma de Oliveira, Andréa Cruz Câmara, Daniel Amancio Duarte, Anderson Stevens Leonidas Gomes, Richard John Heck, Antonio Celso Dantas Antonino, Carlos Menezes Aguiar
INTRODUCTION: This study aimed to evaluate the ability of 2 optical coherence tomographic (OCT) systems to detect apical dentinal microcracks. METHODS: Twenty extracted human single-rooted mandibular incisors were selected. After root canal preparation with an R40 Reciproc file (VDW, Munich, Germany), the specimens presenting apical microcracks were identified using micro-computed tomographic (micro-CT) scanning as the gold standard. Then, the apical portions of the roots were imaged with spectral domain OCT (SD-OCT) and swept-source OCT systems, and the resulting images were blindly evaluated by 3 independent examiners to detect microcracks...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28413768/surgical-resection-of-an-optic-nerve-sheath-meningioma-relevance-of-endoscopic-endonasal-approaches-to-the-optic-canal
#10
Patrick J Hunt, Franco DeMonte, Rosa A Tang, Shirley Y Su, Shaan M Raza
Optic nerve sheath meningiomas (ONSMs) account for less than 2% of meningiomas and 1.7% of orbital tumors. Although rare, the management of these tumors is important as unilateral blindness often results in untreated cases. Radiotherapy has emerged as the preferred treatment. However, therapies for ONSMs are controversial due to the variable natural history of the disease and limitations of surgical and radiotherapy options. A 60-year-old woman presented with monocular left diminished color perception and blurred vision...
April 2017: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/28405489/three-dimensional-optical-coherence-tomography-imaging-and-treatment-of-glaucomatous-optic-nerve-head-defects-associated-with-schisis-like-maculopathy
#11
Zafer Öztaş, Jale Menteş, Halil Ateş, Serhad Nalçacı
We present the three-dimensional (3D) spectral-domain optical coherence tomography (SD-OCT) findings of schisis-like maculopathy associated with structural changes of the optic nerve (ON) head as well as the treatment outcomes of a case of advanced glaucoma. In addition to ophthalmological examination, B-scan and 3D-SD-OCT images of the ON head, peripapillary retina, and the macula were obtained. The B-scan images only detected typical retinoschisis findings. However, the 3D-SD-OCT images of the ON head revealed defects of various sizes, shapes, and depths at the outer wall of the prelaminar and laminar regions of the ON canal...
April 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28388344/the-revised-anatomy-of-the-canals-connecting-the-orbit-with-the-cranial-cavity
#12
Marì Regoli, Eugenio Bertelli
Orbits are connected with the middle cranial fossa via the optic canal, the superior orbital fissure, the M-type orbitomeningeal foramen, the metoptic canal, an accessory anterior opening of the foramen rotundum, and Warwick's canal. They are also in communication with the anterior cranial fossa via the ethmoidal canals and the A-type orbitomeningeal foramen. The anatomy of these conduits has been recently enriched with several details that are summarized and reviewed in this article.
April 2017: Orbit
https://www.readbyqxmd.com/read/28383199/outcomes-of-endoscopic-optic-nerve-decompression-in-patients-with-idiopathic-intracranial-hypertension
#13
Luisam Tarrats, Gabriel Hernández, José M Busquets, Juan C Portela, Luis A Serrano, Lorena González-Sepúlveda, José R Sánchez-Pérez
BACKGROUND: The conventional treatment for idiopathic intracranial hypertension involves weight loss, steroids, diuretics, and/or serial lumbar punctures; however, if the symptoms persist or worsen, surgical intervention is recommended. Surgical options include cerebrospinal fluid diversion procedures, such as ventriculoperitoneal and lumboperitoneal shunts, and optic nerve decompression with nerve sheath fenestration. The latter can be carried out using an endoscopic approach, but the outcomes of this technique have not been firmly established...
April 6, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28349910/good-bugs-vs-bad-bugs-evaluation-of-inhibitory-effect-of-selected-probiotics-against-enterococcus-faecalis
#14
Aarti A Bohora, Sharad R Kokate
INTRODUCTION: The main goal of endodontics is the prevention of apical periodontitis. This is due to the presence of persistent pathogenic microorganisms, such as Enterococcus faecalis, and its ability to directly cause acute and chronic inflammation in the periapical tissues. Lactobacillus has been shown to promote health in the intestines as well as to inhibit the growth of certain problematic oral bacteria. This study explores shifting the established paradigm of endodontic treatment, which has focused on eliminating all bacteria from the canal system and on elimination of the problematic bacteria through introducing probiotics...
April 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28348630/intracanalicular-optic-nerve-swelling-and-signal-change-in-fulminant-untreated-idiopathic-intracranial-hypertension
#15
Anand A Moodley, Mahlubonke S Dlwati, Miranda Durand
The role of the optic canal in the pathogenesis of papilloedema has been under scrutiny recently. Whether a larger canal precedes more severe papilloedema or is the result of bone remodelling from chronically raised pressure across a pressure gradient is not clear. The authors present the magnetic resonance imaging findings of a 29-year-old female with fulminant and untreated idiopathic intracranial hypertension. Imaging showed focal expansion and intrinsic signal changes of the intracanalicular optic nerve...
April 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28345519/anatomical-landmarks-for-maxillary-nerve-block-in-the-pterygopalatine-fossa-a-radiological-study
#16
S Carrier, B Castagneyrol, L Beylacq, K Nouette-Gaulain, M Montaudon, M Laurentjoye
INTRODUCTION: The aim of this study was to describe the anatomical landmarks for maxillary nerve block in the pterygopalatine fossa. The risk of injury to the skull base and maxillary artery was assessed. METHODS: This retrospective study was based on the analysis of 61 consecutive computed tomography angiographies obtained from patients suffering from different pathologies. Anatomical relationships between optic canal (OC), foramen rotundum (FR), inferior orbital fissure (IOF) and puncture point (PP) were assessed...
April 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28316949/evaluation-of-the-role-of-probiotics-in-endodontic-treatment-a-preliminary-study
#17
Aarti Bohora, Sharad Kokate
AIMS AND OBJECTIVES: The principal goal of endodontics is the prevention of periapical infection. Acute and chronic apical periodontitis occur due to the persistence of pathogenic microorganisms such as Enterococcus faecalis and Candida albicans harboring the root canal systems of the teeth. The concept of the use of probiotics in addressing endodontic disease is new and has not been studied adequately. On the basis of the success of probiotics in periodontal treatment, this preliminary work was performed (a) to evaluate the antibacterial efficacy of probiotics against common endodontic pathogens, i...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28292597/the-effect-of-the-dental-operating-microscope-on-the-outcome-of-nonsurgical-root-canal-treatment-a-retrospective-case-control-study
#18
Navid Khalighinejad, Anita Aminoshariae, James C Kulild, Kristin A Williams, Jeannie Wang, Andre Mickel
INTRODUCTION: The aim of the current investigation was to assess the effect of the use of a dental operating microscope on the outcome of nonsurgical root canal treatment (NS RCT) while treating the mesiobuccal (MB) root of the maxillary first molar. METHODS: This retrospective investigation included endodontically treated maxillary first molars (ETMs) with apparent adequate previous NS RCT and restorations referred for endodontic retreatment at the endodontic graduate clinic...
March 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28289839/pneumosinus-dilatans-of-the-spheno-ethmoidal-complex-associated-with-hypovitaminosis-d-causing-bilateral-optic-canal-stenosis
#19
Saritha Aryan, Sumit Thakar, Aniruddha T Jagannatha, Chandrakiran Channegowda, Arun S Rao, Alangar S Hegde
INTRODUCTION: Pneumosinus dilatans (PSD) is a rare disorder of undetermined etiology characterized by expansion of the paranasal sinuses without bony erosion. Of the few cases of PSD described in indexed pediatric literature, there has been no reported case of this disorder presenting with optic canal stenosis in the setting of a vitamin deficiency. CASE MATERIAL: A 12-year-old girl presented with a 3-month history of progressive, painless, and asymmetric visual deterioration in her eyes...
March 13, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28280481/the-optic-canal-a-bottleneck-for-cerebrospinal-fluid-dynamics-in-normal-tension-glaucoma
#20
Achmed Pircher, Margherita Montali, Jatta Berberat, Luca Remonda, Hanspeter E Killer
PURPOSE: To report on the optic canal cross-sectional area (OCA) in Caucasian patients with normal-tension glaucoma (NTG) compared with Caucasian control subjects without known optic nerve (ON) diseases. METHODS: Retrospective analysis of computed tomographic images of the cranium and orbits in 56 NTG patients (30 females and 26 males; 99 of 112 eyes; mean age 67.7 ± 11.1 years). Fifty-six age- and gender-matched subjects (mean age: 68.0 ± 11.2 years) without known ON diseases served as controls...
2017: Frontiers in Neurology
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