Biomechanica Hungarica最新文献_第8页

A térdprotézisek beültetési tényezőinek hatása az ízület kinematikájára 膝关节置换术植入因素对关节运动学的影响

Biomechanica Hungarica Pub Date : 2015-11-24 DOI: 10.15289/BH.V8I1.211

Balassa Péter Gábor, M. Béla

引用次数: 0

A szivacsos csont mechanikai anizotrópiájának mérése mikroszerkezeti végeselemes szimuláció segítségével, a szerkezeti anizotrópia figyelembe vételével 考虑结构各向异性的海绵骨力学各向异性的微观结构有限元模拟测量

Biomechanica Hungarica Pub Date : 2015-11-24 DOI: 10.15289/bh.v8i1.207

Lakatos Éva, Nagy Dominik, Dobó-Nagy Csaba

{"title":"A szivacsos csont mechanikai anizotrópiájának mérése mikroszerkezeti végeselemes szimuláció segítségével, a szerkezeti anizotrópia figyelembe vételével","authors":"Lakatos Éva, Nagy Dominik, Dobó-Nagy Csaba","doi":"10.15289/bh.v8i1.207","DOIUrl":"https://doi.org/10.15289/bh.v8i1.207","url":null,"abstract":"Normal 0 21 false false false HU X-NONE X-NONE Jelen vizsgalat celja a foggyoker kornyezeteben, a terhelesek hatasara kialakulo anizotropia merese volt. A vizsgalatokhoz 10 kulonboző koru ferfi es nő allcsontjabol szarmazo 10 darab mintat vetettunk ala mikro-CT vizsgalatnak. A szerkezeti anizotropia mereset beillesztett ellipszoidok – a csontallomany belső pontjai kornyezeteben a legnagyobb olyan ellipszoid, ami ugy irhato a pont kore, hogy belsejeben csak csontanyagot tartalmaz, es felulete erinti a velőureget – segitsegevel vegeztuk. Feltetelezve, hogy a szerkezeti es mechanikai anizotropia főiranyai megkozelitőleg egybeesnek, a kapott dominans iranyokban kivagott csontkockakra mikroszerkezeti vegeselemes modellt generalva lehetőve valt a szivacsos allcsont mechanikai anizotropiajanak kozelebbi megismerese. A mikroszerkezet vegeselemes szimulacioja segitsegevel merhető volt a foggyoker kornyezeteből szarmazo csontmintak eseten a mechanikai anizotropia foka es becsulhető a harom dominans iranybeli rugalmassagi modulus. DOI: 10.17489/biohun/2015/1/01 /* Style Definitions */ \u0000 table.MsoNormalTable \u0000 {mso-style-name:\"Normal tablazat\"; \u0000 mso-tstyle-rowband-size:0; \u0000 mso-tstyle-colband-size:0; \u0000 mso-style-noshow:yes; \u0000 mso-style-priority:99; \u0000 mso-style-parent:\"\"; \u0000 mso-padding-alt:0cm 5.4pt 0cm 5.4pt; \u0000 mso-para-margin-top:0cm; \u0000 mso-para-margin-right:0cm; \u0000 mso-para-margin-bottom:10.0pt; \u0000 mso-para-margin-left:0cm; \u0000 line-height:115%; \u0000 mso-pagination:widow-orphan; \u0000 font-size:11.0pt; \u0000 font-family:\"Calibri\",\"sans-serif\"; \u0000 mso-ascii-font-family:Calibri; \u0000 mso-ascii-theme-font:minor-latin; \u0000 mso-hansi-font-family:Calibri; \u0000 mso-hansi-theme-font:minor-latin; \u0000 mso-fareast-language:EN-US;}","PeriodicalId":30208,"journal":{"name":"Biomechanica Hungarica","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66902762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of TKR implantation methods on the kinematics of the knee joint TKR植入方式对膝关节运动学的影响

Biomechanica Hungarica Pub Date : 2015-07-20 DOI: 10.17489/biohun/2015/1/02

G. Balassa, B. Csizmadia

引用次数: 0

Micro-FEM based mechanical anisotropy measurement of the trabecular bone, in view of the structural anisotropy 考虑结构各向异性，基于微有限元的骨小梁力学各向异性测量

Biomechanica Hungarica Pub Date : 2015-07-20 DOI: 10.17489/BIOHUN/2015/1/01

É. Lakatos, D. Nagy, C. Dobó-Nagy

引用次数: 0

Dynamic time warping analysis in post-stroke rehabilitation 脑卒中后康复的动态时间扭曲分析

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.17489/biohun/2014/2/06

B. Magyar, G. Stépán, M. Chen

引用次数: 1

Scanning electron and optical microscopic studies of the system of porcine zonular fibres 猪带状纤维系统的扫描电子和光学显微镜研究

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.17489/BIOHUN/2014/2/01

Z. Bocskai, Z. Kiss, Gábor L Sándor, I. Bojtár, Z. Nagy

引用次数: 1

Numerical investigation of the hemostasis process in transient blood flow 瞬时血流中止血过程的数值研究

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.17489/BIOHUN/2014/2/03

Gábor Závodszky, G. Paál

引用次数: 0

Estimation of moments acting on the pelvis in standing and in two different sitting postures 估计在站立和两种不同坐姿下作用在骨盆上的力矩

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.17489/BIOHUN/2014/2/05

B. Hera, József Zalavári

引用次数: 0

Compression test of the mandibular cortical bone: A cadaver study assessing formalin treated or macerated bone specimens 下颌骨皮质骨的压缩试验:一项评估福尔马林处理或浸泡骨标本的尸体研究

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.15289/BH.V7I2.193

János Simonovics, P. Bujtár, K. Varadi, A. Szűcs, Z. Fejér

{"title":"Compression test of the mandibular cortical bone: A cadaver study assessing formalin treated or macerated bone specimens","authors":"János Simonovics, P. Bujtár, K. Varadi, A. Szűcs, Z. Fejér","doi":"10.15289/BH.V7I2.193","DOIUrl":"https://doi.org/10.15289/BH.V7I2.193","url":null,"abstract":"Abstract Nowadays the examination of implants from engineering point of view is becoming more and more supported in the medical fi eld. Instead of the more problematic cadaver examination, the computer based simulations are growing more popular. The examinations must be validated to be able to stay with the realistic situation. Using these engineering methods it became possible to do measurements on the reconstructions of a human resectioned mandible. The creation of the bone models is one of the most varying fields in the biomechanical simulation. In the literature a wide range of Young modulus for the bone cortical layers can be found and these values are actively used even in different further fi nite element simulation researches. However the proper modeling of the cortical layer thickness and correctly calibrated mechanical parameter settings bare key importance regarding the stability and connection of the implants and the fi xing screws. The values of the Young modulus are depending on many factors, for example gender or even the age, not even mentioning further different infl uencing factors. In this study destructive biomechanical examinations were carried out on bones received from dead people. The samplings of the bone were conducted from the area of the screwing used in the mandible reconstruction. Considering the results it can be concluded that the values in the literature are often not as accurate. Regarding orthotropic values of the mandible, so far has only been a small segment of information was covered. The measured values are lower than the ones in the literature. In case of the highest value it is still 3.5 GPa Young modulus in the axial direction. The results can be used in order to create a more reliable model combined with a more realistic Young modulus for the fi nite element simulation of the bone models. On these models the different scenarios of the resection cases can be estimated more precisely with examinations. DOI: 10.17489/biohun/2014/2/02","PeriodicalId":30208,"journal":{"name":"Biomechanica Hungarica","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66902625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of a large volume maxillofacial CBCT system-from biomechanical point of view-as a tool to build patient customized bio-models 从生物力学角度评估大容量颌面CBCT系统作为构建患者定制生物模型的工具

Biomechanica Hungarica Pub Date : 2014-12-01 DOI: 10.17489/BIOHUN/2014/2/04

János Simonovics, P. Bujtár, K. Varadi, A. Szűcs, Z. Fejér

{"title":"Assessment of a large volume maxillofacial CBCT system-from biomechanical point of view-as a tool to build patient customized bio-models","authors":"János Simonovics, P. Bujtár, K. Varadi, A. Szűcs, Z. Fejér","doi":"10.17489/BIOHUN/2014/2/04","DOIUrl":"https://doi.org/10.17489/BIOHUN/2014/2/04","url":null,"abstract":"Abstract The number of patients diagnosed with cancer is reaching a scarily high number worldwide. This is no different in the area of mandible cancer. Unfortunately Hungary is quite high up in the ladder. The registered known number of patients with mandible cancer and the associated number of death occurrences are also showing signifi cant data in the country. However it is easy to diagnose, alcohol consumption and smoking or just bad oral hygiene really pushes the statistics. Inside the oral cavity, in case of mandible cancer and late diagnosis the only viable solution is the bone resection. To determine the extent of the cancer and to carefully plan the surgery procedure or in case of models which were created for biomechanical examinations, the medical science more and more often uses the image based processes and tools. Next to the realistically built models a more punctual mechanical parameter simulation becomes possible. It is highly important that the necessary information is extracted from the patients with the least stress. With the shortest time and smallest radiation the image must be made in a way that the scan can be well evaluated and it is usable. Within the current examination in the medical fi eld of imaging methods a gold standard MSCT and a specifi cally in the head-neck region used CBCT methods will be compared specifi cally from biomechanical modelling point of view. During the comparison the gray value was examined by the use of a cadaver head. The results show that the gray values provided by CBCT differs slightly from the MSCT values that is considered as reference. The more extent absolute error occurs with less frequency. Based on these facts the CBCT can be used for the density based material comparison for biomechanical models with less radiation dose. DOI: 10.17489/biohun/2014/2/04","PeriodicalId":30208,"journal":{"name":"Biomechanica Hungarica","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68196742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0