نتایج جستجو برای: bone quality

تعداد نتایج: 1046748  

ژورنال: سنجش و ایمنی پرتو 2014

Due to the increasing proliferation of radiotherapy centers in the country to treat cancer patients and raise the quality of treatment, it is needed to find the human equivalent phantom for dosimetry, calibration and quality control of radiotherapy devices. Generally, they are enumerated into two categories: homogeneous and nonhomogeneous phantoms (anthropomorphic). The main purpose of this stu...

Journal: :Journal of cellular physiology 2015
Sity Aishah Mansur Aleksandra Mieczkowska Béatrice Bouvard Peter R Flatt Daniel Chappard Nigel Irwin Guillaume Mabilleau

Type 1 diabetes mellitus is associated with a high risk for bone fractures. Although bone mass is reduced, bone quality is also dramatically altered in this disorder. However, recent evidences suggest a beneficial effect of the glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide 1 (GLP-1) pathways on bone quality. The aims of the present study were to conduct a comprehe...

Journal: :Clinical oral implants research 2011
Rejane Faria Ribeiro-Rotta Christina Lindh Andrea Castro Pereira Madeleine Rohlin

OBJECTIVES To survey definitions of bone tissue characteristics and methods of assessing them in studies of dental implant planning and placement. MATERIAL AND METHODOLOGY Three databases were searched using specified indexing terms. Three reviewers selected from the titles and retrieved abstracts in accordance with inclusion and exclusion criteria. Descriptions of bone tissue characteristics...

Journal: :Medicina oral, patologia oral y cirugia bucal 2011
Núria Farré-Pagés Ma Luisa Augé-Castro Fernando Alaejos-Algarra Javier Mareque-Bueno Eduard Ferrés-Padró Federico Hernández-Alfaro

AIMS This study aims to relate bone density in Hounsfield units (Hu) with the primary implant stability measured by insertion torque (Ncm) and resonance frequency analysis (ISQ). MATERIALS AND METHODS Ten patients were included in this study. A total of 54 implant sites were provided from 10 computerized tomography scans. The computerized tomography scan was used for the preoperative evaluati...

2017
Firmin Nongodo Kabore Sabrina Eymard-Duvernay Jacques Zoungrana Stéphanie Badiou Guillaume Bado Arsène Héma Assane Diouf Eric Delaporte Sinata Koulla-Shiro Laura Ciaffi Amandine Cournil

BACKGROUND Bone demineralization, which leads to osteoporosis and increased fracture risk, is a common metabolic disorder in HIV-infected individuals. In this study, we aimed to assess the change in bone quality using quantitative ultrasound (QUS) over 96 weeks of follow-up after initiation of second-line treatment, and to identify factors associated with change in bone quality. METHODS AND F...

2009
C H Sogaard L Mosekilde A Richards W R Walsh

from Bone 15 (4) 393-399 1994 Sodium fluoride has for more than 2 decades been a commonly used therapeutic agent for established osteoporosis because of a repeatedly documented anabolic effect on trabecular bone mass. Recently, however, three controlled trials have failed to demonstrate any therapeutic advantage of NaF over placebo with respect to vertebral fracture rate. Also, there have been ...

2014
RL Abel M Prime A Jin JP Cobb R Bhattacharya

Abstract Introduction Measuring the health of bone is important for understanding the pathogenesis, progression, diagnosis and treatment outcomes for fragility. At present the most common method for measuring bone health in a clinical setting is to assess skeletal mass. The current gold standard is dualenergy X-ray absorptiometry (DXA) which models bones as 2D objects and measures areal bone mi...

2012
Lauren E Carter Gail Kilroy Jeffrey M Gimble Z Elizabeth Floyd

BACKGROUND Bone physiology is increasingly appreciated as an important contributor to metabolic disorders such as type 2 diabetes. However, progress in understanding the role of bone in determining metabolic health is hampered by the well-described difficulty of obtaining high quality RNA from bone for gene expression analysis using the currently available approaches. RESULTS We developed a s...

2013
Alexander Scola Florian Gebhard Sebastian Weckbach Christoph Dehner Ronald Schwyn Ladina Fliri Götz Röderer

OBJECTIVES Surgical treatment of proximal humerus fractures can be challenging due to osteoporosis. The weak bone stock makes stable implant anchorage difficult, which can result in low primary stability. Accordingly, significant failure rates, even with modern locking plates, are reported in the literature. Intraoperative knowledge of local bone quality could be helpful in improving results. T...

2010
Sabine Goldhahn Franz Kralinger Daniel Rikli Marta Marent Jörg Goldhahn

BACKGROUND With an ever-increasing elderly population, orthopaedic surgeons are faced with treating a high number of fragility fractures. Biomechanical tests have demonstrated the potential role of osteoporosis in the increased risk of fracture fixation complications, yet this has not been sufficiently proven in clinical practice. Based on this knowledge, two clinical studies were designed to i...

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