仿生种植牙三维有限元模型   总被引：1，自引：1，他引：1  

王宗篪  谢培庆  庄国铭  赖森财 《三明学院学报》2006,23(2):137-140

目的:建立成人上颌中切牙的仿生种植体三维有限元模型,为分析与探讨仿生种植牙的生物力学特性奠定基础。以成人上颌中切牙为标本,通过螺旋CT扫描和计算机图像处理技术,获取中切牙各截面的轮廓坐标数据,再通过CAD技术进行单元网格的自动划分,形成SuperSAP模型数据文件,输入到SuperSAP93有限元专用分析软件后建模。结果:建立了有效的仿生种植牙三维有限元模型。结论:模型的几何相似性、生物力学相似性均佳,可用于仿生种植牙的生物力学研究。  相似文献   

仿生设计与造型形态   总被引：5，自引：0，他引：5  

王峡 《合肥联合大学学报》2001,11(1):106-108

本通过例子分析了仿生设计与造型形态之间的密切关系,提出了仿生设计势必是我国工业设计的潮流和趋势,会朝向中国古代的“天人合一”境界发展的观点。  相似文献   

Effects and complications of placement of motility coupling post in porous polyethylene orbital implants     

Cui HG  Hu RR  Li HY  Han W 《Journal of Zhejiang University. Science. B》2008,9(6):464-469

Objective: To investigate the effects and complications of primary and secondary placements of motility coupling post (MCP) in the unwrapped porous polyethylene orbital implant (PPOI) following enucleation. Methods: We investigated 198 patients who received PPOI implantation following the standard enucleation procedure in the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China, from 2002 to 2004. These patients were subgrouped into PPOI-only patients (112 cases, received PPOI following enucleation), primary MCP patients (46 cases, received primary placement of MCP during PPOI operation), and secondary MCP patients (40 cases, received secondary placement of MCP 6 months after the initial surgery). Effects and complications among these three groups were compared. Results: The PPOI-only patients took shorter treatment course when compared with other two MCP groups (P<0.001), without significant difference noted between the two MCP groups. However, the two MCP groups had better prosthetic motility than PPOI-only group (P<0.001), without significant difference between the two MCP groups. In the early stage, 2 eyes in the PPOI-only group and 1 eye in the primary MCP group had PPOI infection. In PPOI-only group, 3 (2.68%) eyes had PPOI exposure, which occurred after fitting the prostheses; 4 eyes (8.70%) in primary MCP group and 1 eye (2.50%) in secondary MCP had PPOI exposure, which occurred before fitting the prostheses. After prosthesis was fit successfully, the excessive discharge and granuloma were 33.9% and 1.79% in PPOI group-only, 53.3% and 8.9% in primary MCP group, and 52.5% and 7.5% in secondary MCP group, respectively. Conclusion: Both primary and secondary placements of MCP into the PPOI following enucleation can help patients to obtain desirable prosthetic motility, but maybe associated with more complications. The primary placement of MCP with skilled operation in selected patients is more recommendable than secondary placement.  相似文献   

浅谈童装的仿生设计     

温礼  张志春 《南宁职业技术学院学报》2006,11(2):20-22

仿生设计,顾名思义是指有关模仿生物的设计。自从20世纪60年代仿生学作为一门学科正式诞生以来,经过几十年的探索与实践,巳发展成为横跨多门学科的边缘性学科。服装仿生设计作为仿生学的一个重要分支,也得到了广泛的研究与应用。从童装的仿生设计角度入手,研究童装仿生设计方法,探讨童装仿生设计当中的规律。并且从儿童的角度研究了几种主要的童装仿生方法,既可以使儿童穿上自己喜欢的仿生童装,也能够培养儿童的智力发展和兴趣发展。  相似文献   

口腔医学专业实习前教育改革的设想   总被引：1，自引：0，他引：1  

许少平 《泰州职业技术学院学报》2003,3(4):111-112

本分析了口腔医学教学的性状和社会关心的医疗模式的改变，尤其是发展私立牙科诊所后的一些变化。为了提高口腔医学教学质量，培养更多合格的口腔专业学生，在教学中应有新思路和新方法，对进入临床实习前的教学工作提出了一些设想，包括教学目标、内容和实际操作方法。  相似文献   

多仿生机器鱼群体及单体控制体系结构的研究     

陈尔奎  喻俊志  王硕  谭民 《中国科学院大学学报》2003,20(2):232-237

多仿生机器鱼群体协作与控制的研究,是针对未来仿生机器鱼在水下作业、海洋考察、军事侦察等方面的实际应用而开展的相关理论和关键技术的研究.控制体系结构是其中很重要的一个研究内容,也是今后进一步开展研究工作的基础.考虑到机器鱼自主性和协作性的要求,本文给出了多仿生机器鱼群体和单体控制体系结构,并重点讨论了单体控制体系结构.该体系结构是混合分层的,具有较好的开放性,便于功能的扩展.  相似文献   

Dry Skulls and Cone Beam Computed Tomography (CBCT) for Teaching Orofacial Bone Anatomy to Undergraduate Dental Students     

Fabio Savoldi  Andy W. K. Yeung  Ray Tanaka  Lisa S. Mohammad Zadeh  Carla Montalvao  Michael M. Bornstein  James K. H. Tsoi 《Anatomical sciences education》2021,14(1):62-70

Learning bone anatomy of the skull is a complex topic involving three-dimensional information. The impact of the use of human dry skulls and cone beam computed tomography (CBCT) imaging was investigated in the teaching of undergraduate dental students. Sixty-four first-year students in the University of Hong Kong were randomly divided into eight groups. Four teaching methods were tested: (1) CBCT followed by standard lecture, (2) CBCT followed by lecture with skulls, (3) standard lecture followed by CBCT, and (4) lecture with skulls followed by CBCT. After each, students were given a multiple-choice questionnaire to assess their objective learning outcome (20 questions) and a questionnaire for their subjective satisfaction (10 statements). Surveys were assessed with Cronbach's alpha, Kendall's tau-b, and principal components analysis. Data were analyzed with Student's t-test and a one-way ANOVA (significance α = 0.05). Standard lecture followed by CBCT showed the highest learning outcome score (81.6% ± 14.1%), but no significant difference was present among four teaching methods. Cone beam computed tomography followed by lecture with skulls scored the highest overall subjective satisfaction (4.9 ± 0.8 out of 6), but no significant difference was present among teaching methods. Nevertheless, students' perception of learning was positively influenced by the use of skulls (P = 0.018). The timing of administration of the CBCT did not affect students' subjective satisfaction or objective learning outcome. Students perceived to learn more by using skulls, but their objective learning outcomes were not significantly affected. A discrepancy seems to exist between students' perception of learning and their effective performance.  相似文献   

Late phonological development in Spanish children with bilateral hearing loss / Desarrollo fonológico tardío en niños españoles con pérdidas auditivas bilaterales     

Verónica Martínez  Ana Herrero  Gary Morgan 《Infancia y Aprendizaje》2013,36(4):829-870

Abstract

This study has a twofold objective: to analyse and compare the phonological processes in a sample of Spanish children with hearing loss, both with a cochlear implant and with a hearing aid, with a group with normal hearing; and to determine whether there are differences between the participants with a cochlear implant and with a hearing aid in the frequency and nature of the phonological processes. The sample is made up of 168 participants, eight with hearing loss (four with an implant and four with a hearing aid) and 160 with normal hearing. Samples of spontaneous speech were collected and transcribed using the tools from the CHILDES project. For the analysis, the phonological processes paradigm was adopted, evaluating phonological development based on normative error rates. The participants with a hearing loss show slower phonological development in terms of phonological processes, along with atypical processes. Furthermore, the participants with cochlear implants committed more phonological errors than those that wear a hearing aid. The implications of the results are discussed, and it is recommended that auditory stimulation should be done early in children with hearing loss regardless of their technical aid.  相似文献   

湖北省荆门市城乡6357名中小学生龋病调查报告     

陶建英  赵宗富 《荆门职业技术学院学报》2010,25(5):30-32

目的：掌握青少年学生口腔健康状况及龋齿发病趋势,为制定本市初级卫生保健发展战略和防治龋病提供科学依据。方法：采用整群抽样调查方法,确定了荆门市8所中小学,以年级分层,以教学班为单位随机在学生中进行口腔健康普查,统计龋病发生人次、龋均及DMFT数,应用PEMS3.1标准进行数据分析。结果：受检青少年学生6 357人,患龋人数695,患龋率11.64%,龋均0.53,DMFT3186。结论：近年来,通过全民口腔健康教育,改变了青少年学生口腔卫生习惯,家长关心关注学生口腔健康,口腔医生积极开展防龋行动——对乳磨牙和恒磨牙进行窝沟封闭、在青少年学生中涂氟保护漆保护牙齿,龋龄预防抓早抓小,推广使用含氟牙膏,这一系列的措施行之有效,今后应进一步推广并深入。  相似文献   

儿童龋齿的病因和预防     

李洋 《商丘职业技术学院学报》2014,(2):65-67

为了正确引导儿童进行牙齿的合理保健、促进儿童健康生长。通过对城区五所幼儿园7岁内儿童进行健康体检,发现儿童患龋病人数呈上升趋势。由四联因素分析引起龋齿的原因、指导正确保护牙齿的方法,得出从小养成良好卫生习惯保持口腔清洁可以减少腐蚀机会,可大大降低儿童患龋齿的发病率的结论。  相似文献