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concept of occlusion

Ahmed M Abdelhamid, Kenda I Hanno, Mohamed H Imam
BACKGROUND: The purpose of this prospective cross-over study is to evaluate the effect of bilateral balanced occlusion and canine guidance occlusion on the masseter muscle activity using implant-retained mandibular overdentures. METHODS: After evaluation of 12 completely edentulous patients using cone beam computed tomography (CBCT), mucoperiosteal flaps were reflected exposing the mandibular interforaminal region. Two implants were placed in the interforaminal region for each of the 12 patients...
December 2015: Int J Implant Dent
Martin Krueger, Wolfgang Härtig, Clara Frydrychowicz, Wolf C Mueller, Andreas Reichenbach, Ingo Bechmann, Dominik Michalski
Stroke-induced blood-brain barrier breakdown promotes complications like cerebral edema and hemorrhagic transformation, especially in association with therapeutical recanalization of occluded vessels. As arteries, capillaries and veins display distinct functional and morphological characteristics, we here investigated patterns of blood-brain barrier breakdown for each segment of the vascular tree in rodent models of embolic, permanent, and transient middle cerebral artery occlusion, added by analyses of human stroke tissue...
September 28, 2016: Journal of Cerebral Blood Flow and Metabolism
Javier G Poveda, Gustavo L Silva, Pedro C Silva, Ângelo Nobre
Our goal is to introduce a new hybrid coronary revascularization concept-coronary surgical stenting. The procedure was performed on a 78-year old woman with severe, long and calcified involvement of the proximal left anterior descending artery, chronic total occlusion of the mid-left anterior descending artery and severe disease in the distal left anterior descending artery. An off-pump minimally invasive procedure was performed through the fifth intercostal space, including concurrent surgical placement of a drug-eluting stent in the distal left anterior descending artery, through the left anterior descending artery graft incision, associated with the left internal mammary artery to the mid-left anterior descending artery graft...
September 27, 2016: Interactive Cardiovascular and Thoracic Surgery
Narayan H Gandedkar, Chai Kiat Chng, Vincent Kok Leng Yeow
Thorough planning and execution is the key for successful treatment of dentofacial deformity involving surgical orthodontics. Presurgical planning (paper surgery and model surgery) are the most essential prerequisites of orthognathic surgery, and orthodontist is the one who carries out this procedure by evaluating diagnostic aids such as crucial clinical findings and radiographic assessments. However, literature pertaining to step-by-step orthognathic surgical guidelines is limited. Hence, this article makes an attempt to provide an insight and nuances involved in the planning and execution...
July 2016: Contemporary Clinical Dentistry
David Dreizin, Arthur J Nam, Nikki Tirada, Martin D Levin, Deborah M Stein, Uttam K Bodanapally, Stuart E Mirvis, Felipe Munera
After the nasal bones, the mandible is the second most common site of facial fractures, and mandibular fractures frequently require open reduction. In the trauma injury setting, multidetector computed tomography (CT) has become the cornerstone imaging modality for determining the most appropriate treatment management, fixation method, and surgical approach. Multidetector CT is also used to assess the adequacy of the reduction and evaluate potential complications in the postoperative period. For successful restoration of the mandible's form and function, as well as management of posttraumatic and postoperative complications, reconstructive surgeons are required to have a detailed understanding of mandibular biomechanics, occlusion, and anatomy...
September 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Niyaz Ahmad, Rizwan Ahmad, Atta Abbas Naqvi, Mohammad Ashafaq, Md Aftab Alam, Farhan Jalees Ahmad, Mastour Safer Al-Ghamdi
Antioxidants, with reported neuroprotective activity, encounter free radical induced neural damage leading to reduced risk of cerebral ischemia-reperfusion (IR) injury. Safranal, an antioxidant drug with potential role in the amelioration of cerebral ischemia, endures low solubility and poor absorption property thus resulting a low serum and tissue bioavailability. This research aims to prepare nanoemulsion with the concept; to increase the bioavailability in order to reduce oxidative stress-induced brain injury as well as to evaluate the brain-drug targeting following non-invasive nasal route administration in middle cerebral artery occlusion (MCAO) animal model...
September 9, 2016: Artificial Cells, Nanomedicine, and Biotechnology
Wen Wu, Hui Chen, Yuhai Cen, Yang Hong, Balvinder Khambay, Pheng Ann Heng
PURPOSE: The surgical treatment of many dentofacial deformities is often complex due to its three-dimensional nature. To determine the dental occlusion in the most stable position is essential for the success of the treatment. Computer-aided virtual planning on individualized patient-specific 3D model can help formulate the surgical plan and predict the surgical change. However, in current computer-aided planning systems, it is not possible to determine the dental occlusion of the digital models in the intuitive way during virtual surgical planning because of absence of haptic feedback...
September 6, 2016: International Journal of Computer Assisted Radiology and Surgery
C Caradu, A S Battut, C Gonthier, D Midy, E Ducasse
One third of patients with critical limb ischemia (CLI) has below the knee lesions and requires a restoration of direct blood flow into the foot. However, many of these patients are ineligible for open surgery. The primary goals thus become pain relief and limb salvage over patency. The angiosome concept helps determine the target artery to treat in priority. The endovascular approach has decreased morbidity and mortality rates compared to distal bypass surgery; while subintimal retrograde, trans-collateral and loop techniques push the limits of open surgery by reopening the plantar arch, thereby improving run-off...
September 1, 2016: Journal des Maladies Vasculaires
Irene M Lang, Peter Dorfmüller, Anton Vonk Noordegraaf
Chronic thromboembolic pulmonary hypertension (CTEPH) is a late sequel of venous thromboembolism that cannot be completely reproduced in animal models. The prevalence of CTEPH in humans is estimated at roughly 17-20 per million; however, partly because up to 50% of patients with CTEPH never experience symptomatic pulmonary embolism, precise numbers on the incidence and prevalence are not known. Because CTEPH is diagnosed at a median age of 63 years in patients who often have other concomitant cardiovascular disease or lung disease, assessment of pathophysiology in patients can be challenging, We do know that CTEPH is a dual vascular disorder...
July 2016: Annals of the American Thoracic Society
Sandra Boned, Marina Padroni, Marta Rubiera, Alejandro Tomasello, Pilar Coscojuela, Nicolás Romero, Marián Muchada, David Rodríguez-Luna, Alan Flores, Noelia Rodríguez, Jesús Juega, Jorge Pagola, José Alvarez-Sabin, Carlos A Molina, Marc Ribó
BACKGROUND: Identifying infarct core on admission is essential to establish the amount of salvageable tissue and indicate reperfusion therapies. Infarct core is established on CT perfusion (CTP) as the severely hypoperfused area, however the correlation between hypoperfusion and infarct core may be time-dependent as it is not a direct indicator of tissue damage. This study aims to characterize those cases in which the admission core lesion on CTP does not reflect an infarct on follow-up imaging...
August 26, 2016: Journal of Neurointerventional Surgery
Vieri Grandi, Irene Baldi, Pietro Cappugi, Moira Mori, Nicola Pimpinelli
BACKGROUND: Actinic Keratoses (AK) are considered a form of in situ Squamous Cell Carcinoma (SCC) arising on chronically photoexposed skin. PDT with ALA or MAL is an effective treatment for multiple AK due its high Overall Response Ratio (ORR) but is burdened by important drawbacks: time-consumption, pain and high costs. Indole-3 acetic acid (IAA) is a newly described photosensitizer with proven clinical efficacy on seborrheic dermatitis and acne vulgaris. The aim of the study was to assess efficacy, safety and tolerability of a cycle of IAA-PDT at 0...
August 23, 2016: Photodiagnosis and Photodynamic Therapy
Martin M I Sabandal, Edgar Schäfer
Mineralization defects like amelogenesis imperfecta are often of hereditary origin. This article reviews the diagnostic findings and summarizes the suggested treatment approaches. Currently, there are no defined therapy recommendations available for patients suffering from amelogenesis imperfecta. The mentioned therapies are more or less equal but no comprehensive therapy recommendation is evident. When treating patients suffering from amelogenesis imperfecta, a comprehensive therapy of almost every dental discipline has to be considered...
September 2016: Odontology
H Jalaie, K Schleimer, M E Barbati, A Gombert, J Grommes, M A F de Wolf, R de Graaf, C H A Wittens
BACKGROUND: Postthrombotic syndrome (PTS) is the development of symptoms and signs of chronic venous insufficiency following deep vein thrombosis (DVT) and has a significant negative effect on the quality of life. The current understanding is that the clinical manifestation of PTS is related more to venous obstruction than it is to venous reflux. The use of interventional techniques for the treatment of venous obstruction and/or venous occlusion has rapidly increased in recent years. OBJECTIVE: This article summarizes the current concept of endovenous and hybrid interventions and presents the optimized treatment of choice in patients with chronic symptomatic venous obstruction...
2016: Gefässchirurgie: Zeitschrift Für Vaskuläre und Endovaskuläre Chirurgie
Shlomo B Cohen, Jerome Bouaziz, Ariella Jakobson-Setton, Motti Goldenberg, Eyal Schiff, Raoul Orvieto, Adrian Shulman
OBJECTIVE: Investigate a novel office hysteroscopic tubal catheterization therapeutic method for proximal tubal occlusion. STUDY DESIGN: Prospective cohort study in a tertiary referral center. We evaluated the procedure on a group of 27 patients that were referred to our unit for proximal tubal occlusion demonstrated by hysterosalpingography, 9 (33.3%) of them with primary infertility and 18 of them (66.6%) with secondary infertility. The intervention included the usage of the modified Novy cornual cannulation set which was inserted through a 5F working cannel during an office operative hysteroscopy, followed by fallopian tube irrigation with saline-air mixture under ultrasonographic imaging...
September 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
J Sun, H Zeng, Y Q Wang, Y Y Zhao
Takayasu's arteritis is a rare, idiopathic, chronic inflammatory disease. Its course is unpredictable, but slow progression is usual, leading to stenosis, occlusion, or aneurismal degeneration of the aorta or its major branches. We present the anesthesia management of pregnancy in four women admitted to Peking University Third Hospital for caesarean section from year 2006 to 2015 complicated with Takayasu's arteritis and review this disease with special reference to natural history, diagnostic criteria, classification, prognostic factors, and anesthesia considerations...
February 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Carolin Gramsch, Stefan Zülow, Felix Nensa, Stefan Maderwald, Sophia Göricke, Adrian Ringelstein, Oliver Müller, Ulrich Sure, Isabel Wanke, Marc Schlamann
OBJECTIVES: Catheter angiography (DSA) as gold standard for the evaluation of aneurysmal occlusion after coiling has now been largely replaced by MRI or CTA in long term observations. However, the first year after treatment is crucial because most recurrences occur in this time. Until now no guidelines exist concerning the imaging modality to adopt in this period. Aim of the study was to determine whether DSA could also be omitted in the first follow-up examination after coiling due to MRI results...
October 2016: Clinical Neurology and Neurosurgery
Pascal Magne, Raymond Cheung
STATEMENT OF PROBLEM: Selecting material for a minimally invasive occlusal veneer reconstruction concept requires an understanding of how stresses are distributed during functional and parafunctional forces. PURPOSE: The purpose of this in vitro study was to investigate stress distribution in a maxillary molar restored with ultrathin occlusal veneers and subjected by an antagonistic mandibular molar to clenching and working and nonworking movements. MATERIAL AND METHODS: A maxillary first molar was modeled from microcomputed tomography (micro-CT) data, using medical image processing software, stereolithography editing/optimizing software, and finite element software...
August 7, 2016: Journal of Prosthetic Dentistry
Edward Gillis, Charles Rampersaud, Emmanuelle Pease, Paul Buscemi
BACKGROUND: In obstructive sleep apnea (OSA), occlusion of the upper airway by soft tissue causes intermittent hypoxemia and can have serious sequelae. A novel implantable medical device for OSA is composed of a linear silicone elastic element held in an extended state by a bioabsorbable external sheath. The implant is delivered to the tongue base or soft palate via a minimally invasive approach. Normal tissue healing anchors the device at the attachment points before the bioabsorbable material dissolves and the elastic element contracts to stabilize the surrounding tissue...
2016: Nature and Science of Sleep
Josef Schweiger, Jan-Frederik Güth, Daniel Edelhoff, Juliane Stumbaum
New treatment concepts for complete denture fabrication, including digital components, may increase the predictability of the treatment outcome. The reduced number of appointments, improved biocompatibility of the materials, opportunity to copy the outline of existing dentures, possibility of a virtual evaluation, and reduction of costs have changed the treatment workflow considerably. This becomes even more important against the background of an aging population. The innovative approach presented describes the combination of an impression-occlusal rim with a 3-dimesional face scan that allows a virtual evaluation, which might complement or even replace the traditional evaluation of a conventional tooth arrangement...
August 1, 2016: Journal of Prosthetic Dentistry
Kornelia E C Wirsching, Thomas S Kühnel
Objectives: Hereditary hemorrhagic telangiectasia (HHT) is characterized by the presence of vascular malformations with an absence of capillaries between arteries and veins. One major manifestation site is the nasal mucous membrane where recurrent nosebleeds occur. Our clinical strategy to treat patients with HHT has the aim to reduce nasal bleeding long-term with minimal local and general side effects. Methods: We describe staged diagnosis and therapy including individual medical treatments of 97 patients with HHT...
July 21, 2016: Clinical and Experimental Otorhinolaryngology
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