نتایج جستجو برای: fracture shape factor

تعداد نتایج: 1112999  

2015
Qing-Bo Lv Xin Fu Hai-Ming Jin Hai-Chao Xu Zhe-Yu Huang Hua-Zi Xu Yong-Long Chi Ai-Min Wu

The relationship between weight change and risk of hip fracture is still controversial. We searched PubMed and Embase for studies on weight change and risk of hip fracture. Eight prospective studies were included. The weight loss studies included 85592 participants with 1374 hip fractures, and the weight gain studies included 80768 participants with 732 hip fractures. Weight loss is more likely...

2010
Tristan Whitmarsh Ludovic Humbert Mathieu De Craene Luis Miguel del Río Barquero Karl D. Fritscher Rainer Schubert Felix Eckstein Thomas M. Link Alejandro F. Frangi

Area Bone Mineral Density (aBMD) measured by Dual energy X-ray Absorptiometry (DXA) is an established criterion in the evaluation of hip fracture risk. The evaluation from these planar images however is limited to 2D while it has been shown that proper 3D assessment of both the shape and the BMD distribution improves the fracture risk estimation. In this work we present a method to reconstruct ...

Journal: :Information processing in medical imaging : proceedings of the ... conference 2007
Qiong Han Derek Merck Joshua H. Levy Christina Villarruel James N. Damon Edward L. Chaney Stephen M. Pizer

In deformable model segmentation, the geometric training process plays a crucial role in providing shape statistical priors and appearance statistics that are used as likelihoods. Also, the geometric training process plays a crucial role in providing shape probability distributions in methods finding significant differences between classes. The quality of the training seriously affects the fina...

Journal: :Sig. Proc.: Image Comm. 2002
Dengsheng Zhang Guojun Lu

Shape description is one of the key parts of image content description for image retrieval. Most of existing shape descriptors are usually either application dependent or non-robust, making them undesirable for generic shape description. In this paper, a generic Fourier descriptor (GFD) is proposed to overcome the drawbacks of existing shape representation techniques. The proposed shape descrip...

Journal: :Archives of emergency medicine 1988
P D Britton

Fracture of the lateral portion of the distal end of the tibia in adults is known as the fracture of Tillaux (Tillaux, 1872). The fracture line extends vertically from the distal articular surface of the tibia upwards to the lateral cortex. The fragment is roughly quadrangular in shape. The analogous epiphyseal injury is less common and two such cases are presented here, both were fixed interna...

Journal: :journal of dental research, dental clinics, dental prospects 0
hadi mokhtarpour dds, ms assistant professor, department of prosthodontics, faculty of dentistry, sari university of medical sciences, sari, iran reza eftekhar ashtiani dds, ms assistant professor, department of dental technology, school of dentistry, shahid beheshti university of medical sciences, tehran, iran minoo mahshid dds, ms professor, department of prosthodontics, school of dentistry, shahid beheshti university of medical sciences, tehran, iran farhad tabatabaian dds, ms assistant professor, department of prosthodontics, school of dentistry, shahid beheshti university of medical sciences, tehran, iran marzieh alikhasi dds, ms associate professor, department of prosthodontics, school of dentistry, tehran university of medical sciences, tehran, iran

background: fracture load of implant-supported restorations is an important factor in clinical success. this study evaluated the effect of two techniques for screw access hole preparation on the fracture load of cement-screw retained implant-supported zirconia-based crowns. methods: thirty similar cement-screw retained implant-supported zirconia-based maxillary central incisor crowns were evalu...

Journal: :international journal of transportation engineering 0
seyed mohammad farnam ph.d candidate, department of civil engineering, bu-ali sina university, hamedan, iran fereydoon rezaie associate professor, department of civil engineering, bu-ali sina university, hamedan, iran

initial cracks occur in high strength concrete sleepers for various reasons, such as shrinkage and wrong curing and long lifetime of over 50 years of sleepers. these cracks may lead to complete failure of the structure. in order to more accurately design the sleepers, fracture mechanics (not strength of materials) should be incorporated. in order to achieve this purpose, it is important to fore...

2016
Asuka Suzuki Hiroshi Yukawa Yoshinori Murata

A consistent description of the hydrogen permeation through metal membrane based on hydrogen chemical potential proposed has been explained in detail. The hydrogen flux is proportional to the PCT factor, fPCT, consistently, which reflects the shape of the pressure-composition-isotherm (PCT curve) of the material. In addition, in view of the PCT factor, fPCT, and the ductile-to-brittle transitio...

2016
SORIN POROJAN LILIANA POROJAN MIHAELA BÎRDEANU CRISTINA SAVENCU ANGHEL CERNESCU

Fracture of ceramic materials has been one of the most frequently reported complications for all-ceramic restorations. The aim of the study was to analyze the fracture features of hot-pressed ceramic crowns in order to evaluate areas susceptible to crack initiation and crack propagation correlated with stress areas. The crowns were inspected visually to determine the shape and orientation of th...

2012
Jie Wu Pavani Davuluri Kevin Ward Charles Cockrell Rosalyn S. Hobson Kayvan Najarian

Fracture detection in pelvic bones is vital for patient diagnostic decisions and treatment planning in traumatic pelvic injuries. Manual detection of bone fracture from computed tomography (CT) images is very challenging due to low resolution of the images and the complex pelvic structures. Automated fracture detection from segmented bones can significantly help physicians analyze pelvic CT ima...

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