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Study of the intrinsic mechanisms of nickel additive for grain refinement and strength enhancement of laser aided additively manufactured Ti–6Al–4V 被引量:16
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作者 Shang Sui Youxiang Chew +3 位作者 Fei Weng Chaolin Tan Zhenglin Du Guijun Bi 《International Journal of Extreme Manufacturing》 SCIE EI CAS 2022年第3期132-148,共17页
It is well-known that grain refiners can tailor the microstructure and enhance the mechanical properties of titanium alloys fabricated by additive manufacturing(AM). However, the intrinsic mechanisms of Ni addition on... It is well-known that grain refiners can tailor the microstructure and enhance the mechanical properties of titanium alloys fabricated by additive manufacturing(AM). However, the intrinsic mechanisms of Ni addition on AM-built Ti–6Al–4V alloy is not well established. This limits its industrial applications. This work systematically investigated the influence of Ni additive on Ti–6Al–4V alloy fabricated by laser aided additive manufacturing(LAAM). The results showed that Ni addition yields three key effects on the microstructural evolution of LAAM-built Ti–6Al–4V alloy.(a) Ni additive remarkably refines the prior-β grains, which is due to the widened solidification range. As the Ni addition increased from 0 to 2.5 wt. %, the major-axis length and aspect ratio of the prior-β grains reduced from over 1500 μm and 7 to 97.7 μm and1.46, respectively.(b) Ni additive can discernibly induce the formation of globular α phase,which is attributed to the enhanced concentration gradient between the β and α phases. This is the driving force of globularization according to the termination mass transfer theory. The aspect ratio of the α laths decreased from 4.14 to 2.79 as the Ni addition increased from 0 to2.5 wt. %.(c) Ni as a well-known β-stabilizer and it can remarkably increase the volume fraction of β phase. Room-temperature tensile results demonstrated an increase in mechanical strength and an almost linearly decreasing elongation with increasing Ni addition. A modified mathematical model was used to quantitatively analyze the strengthening mechanism. It was evident from the results that the α lath phase and the solid solutes contribute the most to the overall yield strength of the LAAM-built Ti–6Al–4V–x Ni alloys in this work. Furthermore, the decrease in elongation with increasing Ni addition is due to the deterioration in deformability of the β phase caused by a large amount of solid-solution Ni atoms. These findings can accelerate the development of additively manufactured titanium alloys. 展开更多
关键词 Ni addition microstructure refinement laser aided additive manufacturing titanium alloys strengthening mechanism
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Numerical and experimental analysis of quenching process for cam manufacturing 被引量:2
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作者 唐倩 裴林清 肖寒松 《Journal of Central South University》 SCIE EI CAS 2010年第3期529-536,共8页
In order to obtain satisfactory mechanical properties for the cam used in high-power ship diesel engines, a new quenching technology was proposed by designing a two-stage quenching process with an alkaline bath as the... In order to obtain satisfactory mechanical properties for the cam used in high-power ship diesel engines, a new quenching technology was proposed by designing a two-stage quenching process with an alkaline bath as the quenching medium. To demonstrate the effectiveness of the proposed new quenching technology, both numerical analysis and experimental study were performed. The new quenching technology was analyzed using finite element method. The combined effects of the temperature, stress and microstructure fields were investigated considering nonlinear material properties. Finally, an experimental study was performed to verify the effectiveness of the proposed new quenching technology. The numerical results show that internal stress is affected by both thermal stress and transformation stress. In addition, the direction of the internal stress is changed several times due to thermal interaction and microstructure evolution during the quenching process. The experimental results show that the proposed new quenching technology significantly improves the mechanical properties and microstructures of the cam. The tensile strength, the impact resistance and the hardness value of the cam by the proposed new quenching technology are improved by 4.3%, 8.9% and 3.5% compared with those by the traditional quenching technology. Moreover, the residual stress and cam shape deformation are reduced by 40.0% and 48.9% respectively for the cam manufactured by the new quenching technology. 展开更多
关键词 quenching process cam manufacturing finite element method NUMERICAL simulation experimental study
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Complications of CAD/CAM Fabricated Surgical Template for Static Computer-Aided Implant Surgery
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作者 Yu Kishimoto Yuka Hasegawa +2 位作者 Yasunori Kanemitsu Kuniteru Nagahara Tetsuji Nakamoto 《Open Journal of Stomatology》 2022年第4期103-107,共5页
Purpose: Surgical templates produced by digital simulation and CAD/CAM allow for three-dimensional control of implant placement. However, due to clinical limitations, there are complications during the use of the temp... Purpose: Surgical templates produced by digital simulation and CAD/CAM allow for three-dimensional control of implant placement. However, due to clinical limitations, there are complications during the use of the template. The purpose of this study was to summarize the complications associated with the use of surgical templates for static computer-aided implant surgery. Methods: Complications were collected during the observation period, and then their implant sites were reanalyzed with simulation software. Results: There were 104 cases during the observation period, 5 cases had complications. Mechanical complications were observed in four cases, including three cases in which the frame of the template fractured during implant placement surgery and one case in which the sleeve fell off the surgical template. In one case, there was an error in the planned position. All cases were mandibular molar cases, and all cases of frame fracture were at the free end defect site. All cases had a Hounsfield unit of more than 700 at the implant site, and some of them had a significantly small jaw opening. Conclusion: Although the spread of CAD/CAM surgical templates has made it possible to avoid problems caused by the position of the implant, it has been difficult to avoid fractures in cases of mandibular free end defects with high Hounsfield unit. 展开更多
关键词 CAD/cam Surgical Template Static Computer-aided Implant Surgery
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基于UG-II/Manufacturing模块的凸轮轮廓的交互式编程与加工仿真研究
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作者 吴义生 冯向勇 王宁生 《机械设计与制造》 2003年第4期60-61,共2页
介绍了UGII及其Manufacturing模块,对凸轮轮廓交互式图形编程作了一定的分析,研究了利用UG-II/Manufacturing模块进行凸轮轮廓的加工仿真,从而提出了改进凸轮轮廓数控编程的方法。
关键词 凸轮 轮廓 交互式图形编程 UGⅡ manufacturing模块 数控编程 数控加工 仿真 CAD cam
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MANUFACTURING SERVICE SYSTEM BASED ON WEB SERVICES FOR PARALLEL KINEMATICS MACHINES
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作者 张艳 钟诗胜 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2008年第2期135-140,共6页
Parallel kinematics machine (PKM) is advantageous over the serial machine tools in processing the complex-surface products. A manufacturing service system for PKM is developed to provide the services of the complex-... Parallel kinematics machine (PKM) is advantageous over the serial machine tools in processing the complex-surface products. A manufacturing service system for PKM is developed to provide the services of the complex-surface machining for potential geographically-dispersed manufacturing enterprises. In order to easily in- tegrate the external system, Web services are used to encapsulate post-processing functions of PKM legacy sys- tems, including compilation, workspace calculation, interfere calibration, and kinematics transformation. A ser- vice-oriented architecture(SOA) is proposed for the cooperative work between the PKM system and its client. The workflow and the function module of this manufacturing service system are presented. An example shows that as a result of SOA and loose coupling, such a Web service-based manufacturing service system is easier to in- tegrate and interoperate with its client. Meanwhile, the system decreases the manufacturing cost and improves the efficiency than its former kind of distributed system. 展开更多
关键词 machine tools computer aided manufacturing Web services service-oriented architecture
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Effect of cyclic heat treatment on microstructure and mechanical properties of laser aided additive manufacturing Ti-6Al-2Sn-4Zr-2Mo alloy
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作者 Shang Sui Youxiang Chew +4 位作者 Zhiwei Hao Fei Weng Chaolin Tan Zhenglin Du Guijun Bi 《Advanced Powder Materials》 2022年第1期59-66,共8页
Globularαphases can significantly improve the ductility of titanium alloys.Cyclic heat treatment(CHT)has been proved to be an effective way to induce the formation of globularαphases inα+βtitanium alloy Ti-6Al-4V ... Globularαphases can significantly improve the ductility of titanium alloys.Cyclic heat treatment(CHT)has been proved to be an effective way to induce the formation of globularαphases inα+βtitanium alloy Ti-6Al-4V fabricated by laser aided additive manufacturing(LAAM).However,there is no prior research reporting methods for obtaining globularαphases in LAAM-built near-αtitanium alloys.This work investigated the cyclic heat treatment(CHT)procedures suitable for the LAAM-built near-αtitanium alloy Ti-6Al-2Sn-4Zr-2Mo(Ti6242)to attain the globularαphases.The results show that 980​℃ is the most suitable upper temperature limit for CHT.However,it is difficult to achieve a high volume fraction of the globularαphases in the LAAM-built Ti6242 alloys through CHT,which is ascribed to the low composition gradient caused by moreα-stabilizing elements and fewerβ-stabilizing elements.The as-built sample demonstrated elongation of 6.3%,which is lower than the AMS 4919J standard(elongation≥10%).After 980​℃ CHT and 980​℃ CHT with solution heat-treatment,the formation of the globularαphases significantly increased the elongation to 13.5%and 12.9%,respectively.Although the mechanical strength is reduced after heat-treatment,the room-temperature tensile properties still exceed the AMS 4919J standard.Fractography examination showed that the as-built sample exhibited a mixed brittle and ductile fracture behavior,while the 980​℃ CHT and 980​℃ CHT with solution heat-treated samples displayed ductile fracture. 展开更多
关键词 Cyclic heat treatment Globularαphase Ti6242 alloy Laser aided additive manufacturing Room-temperature tensile properties
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A CAD EXPERT SYSTEM OF AIRCRAFT MANUFACTURING COORDINATION
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作者 傅向阳 应维云 +1 位作者 郭远峰 周儒荣 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1996年第2期62+57-61,共6页
讨论了工程CAD专家系统特点,提出其一般结构。为了解决如飞机制造协调等复杂工程问题,实现一种层次分布式CAD专家系统(HDES)结构。HDES由元级、任务级两个水平的分布式专家系统组成:任务级专家系统(T-ES)主要用于应用设计,它... 讨论了工程CAD专家系统特点,提出其一般结构。为了解决如飞机制造协调等复杂工程问题,实现一种层次分布式CAD专家系统(HDES)结构。HDES由元级、任务级两个水平的分布式专家系统组成:任务级专家系统(T-ES)主要用于应用设计,它们在其自己的设计领域中执行;元级专家系统(M-ES)则处理合作。介绍了层次-框架-规则的专家系统组织表示方法。 展开更多
关键词 expert systems COORDINATION computer aided design aircraft manufacturing DISTRIBUTION
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Study on the Digital Manufacturing System of Ship Model Surface
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作者 ZHU Linsen TANG Yangping BIN Hongzan FENG Qingxiu XIONG Zhengpeng (school of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074 China 《武汉理工大学学报》 CAS CSCD 北大核心 2006年第S2期547-551,共5页
Because a ship model surface (SMS) is a large double-curved 3-D surface,the machining efficiency of the cur- rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to ... Because a ship model surface (SMS) is a large double-curved 3-D surface,the machining efficiency of the cur- rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to greatly improve the machining efficiency and precision of SMS,based on the CAD/CAM/CNC technology,this paper proposed a model of SMS digi- tal manufacturing system,which is composed of five functional modules (preprocess module,CAD module,CAM module,post- process module and CNC module),and a twin-skeg SMS as an example,the key technologies & design principle of the nodtules were investigated also Based on the above research works,the first set of 4-axis SMS Digital Manufacturing System in China has been successfully developed,which can reduce the machining time of the twin-skeg SMS from 30 working days needed for the cur- rent handcrafting manufacturing method to 8 hours now,and which can control more effectively the precision of SMS also. 展开更多
关键词 SHIP ENGINEERING SHIP model surface(SMS) DIGITAL manufacturing CAD/cam/CNC
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CAD/CAM在口腔修复中的应用现状
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作者 黄浩 李雪林 +3 位作者 韩泽华 舒文 朱鹏飞 向盈盈 《昆明医科大学学报》 CAS 2024年第8期161-165,共5页
近年来计算机辅助设计和制造(CAD/CAM)不断推动口腔领域的发展和改革。口腔修复是口腔医学的重要组成部分,CAD/CAM越来越多地运用于口腔修复,促使口腔修复飞速发展。通过总结多篇国内外文献,概述CAD/CAM在口腔修复中的应用进展。
关键词 计算机辅助设计 计算机辅助制造 口腔修复
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An Integrated Geometric Modeling Methodology for 2.5D Cylindrical Prismatic Part for Computer Aided Process Planning
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作者 Viswa Mohan Pedagopu Manish Kumar 《Intelligent Control and Automation》 2014年第4期183-189,共7页
The field of solid modeling has created numerous techniques for unambiguous computer representations of three-dimensional objects. Its data structures and algorithms have been used in a broad range of applications: Co... The field of solid modeling has created numerous techniques for unambiguous computer representations of three-dimensional objects. Its data structures and algorithms have been used in a broad range of applications: Computer-Aided Design and Computer-Aided Manufacturing (CAD/ CAM), robotics, computer vision, computer graphics and visualization, virtual reality, etc. This research paper is used to generate process plan from feature-based modeling, based on an integrated geometric modeling system that supports both feature-based modeling and information storage. Present system is developed only for milling components and limited to selective machining features for prismatic components and further implemented for more machining features to develop algorithms for modeling the components through the input of machining features. As a result, feature information is directly available to downstream activities, and feature extraction is no longer needed. The various systematic steps involved in this approach are study of Design, identification of Features, selection of Processes, Tools and Machines, Machining and Inspection [DFPTMMI]. Machining features generated in the design stage are recognized and stored under the Visual Basic control of CATIA software ActiveX interface. Algorithms are developed for individual features and these algorithms are embedded in Visual Basic forms. This system is discussed and suited for 2.5 Dimensional part approach, however, that can be extended to 3 dimensional prismatic part and complex features machining. Finally a process planning chart has been presented as a model process planning. 展开更多
关键词 Modeling FEATURE COMPUTER aided manufacturing Design Prismatic Part
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Computer-Aided Design and Fabrication of Finger Prosthesis
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作者 Takeshi Murayama Kosei Oono +3 位作者 Mitsunori Tada Toru Eguchi Misuzu Nagami Mitsuhiro Tamamoto 《Journal of Biomedical Science and Engineering》 2015年第2期98-103,共6页
Custom-made esthetic finger prostheses, which are used for rehabilitation of patients with missing or impaired fingers, have been fabricated manually. However, such fabrication is time-consuming and requires manual sk... Custom-made esthetic finger prostheses, which are used for rehabilitation of patients with missing or impaired fingers, have been fabricated manually. However, such fabrication is time-consuming and requires manual skill. Here we propose a computer-aided method for fabricating finger pros-theses to save time and allow fabrications that do not require considerable manual skill. In this method, the dimensions of a patient’s healthy finger on the contralateral hand are first measured using a caliper. Using these dimensions, a three-dimensional model is constructed for fabricating a prosthesis for the patient’s impaired finger. Using the 3D model, a mold is designed using 3D modeling tools and a computer-aided design system. The resulting mold is then fabricated using a 3D printer. A finger prosthesis is fabricated by pouring silicone resin into the mold. A finger prosthesis for a volunteer was experimentally fabricated according to the proposed method. To evaluate the size and shape of the finger prosthesis, the difference between the finger prosthesis and the original finger of the volunteer was analyzed. Because the average difference between them was 0.25 mm, it was concluded that the proposed method could be used to fabricate a finger prosthesis of adequate size and shape. 展开更多
关键词 FINGER PROSTHESES ESTHETIC PROSTHESES COMPUTER-aided Design 3D PRINTER Additive manufacturing
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CAD/CAM与传统暂时性修复体边缘及内部适合性的体外研究
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作者 霍欢 周慧 张海兵 《中华老年口腔医学杂志》 2024年第4期205-209,共5页
目的研究CAD/CAM方法与传统方法对暂时性修复体的边缘及内部适合性的影响。方法将60颗全冠预备标准模型树脂牙随机分成四组(n=15):Protemp^(TM)4组、PMMA组、Cemeo组和Upcera PMMA组。制作出相应冠修复体后,将其粘接于相应的标准模型牙... 目的研究CAD/CAM方法与传统方法对暂时性修复体的边缘及内部适合性的影响。方法将60颗全冠预备标准模型树脂牙随机分成四组(n=15):Protemp^(TM)4组、PMMA组、Cemeo组和Upcera PMMA组。制作出相应冠修复体后,将其粘接于相应的标准模型牙上,水浴24 h,沿颊舌向的定位线切开。体视显微镜放大后拍照,利用Imageview显微测量软件对边缘及内部的参考点的间隙进行测量,并进行统计学分析。结果3组CAD/CAM暂时性修复体间边缘适合性、轴壁适合性、轴牙合线角适合性、牙合面适合性两两比较差异无统计学意义(P>0.05),传统暂时性修复体Protemp^(TM)4与3组CAD/CAM暂时性修复体间任意一组边缘适合性、轴壁适合性、轴牙合线角适合性、牙合面适合性两两比较差异均具有统计学意义(P<0.05)。结论CAD/CAM暂时性修复体的边缘及内部(轴壁、轴牙合线角、牙合面)适合性优于传统直接法制作的暂时性修复体。 展开更多
关键词 暂时性修复体 边缘适合性 内部适合性 计算机辅助设计/计算机辅助制作技术(CAD/cam)
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橡皮障隔离技术在椅旁CAD/CAM瓷嵌体修复治疗中的应用
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作者 李曌阳 段友南 马涛 《中西医结合护理》 2024年第1期18-21,共4页
目的研究橡皮障隔离技术在椅旁计算机辅助设计(CAD)/计算机辅助制作(CAM)瓷嵌体修复治疗中的应用效果。方法选择2020年1月—2022年1月医院牙体牙髓科行椅旁CAD/CAM瓷嵌体修复治疗的患者60例,随机分为研究组和对照组,各30例。对照组按照... 目的研究橡皮障隔离技术在椅旁计算机辅助设计(CAD)/计算机辅助制作(CAM)瓷嵌体修复治疗中的应用效果。方法选择2020年1月—2022年1月医院牙体牙髓科行椅旁CAD/CAM瓷嵌体修复治疗的患者60例,随机分为研究组和对照组,各30例。对照组按照常规流程操作,使用常规方法进行术野隔离;研究组在操作治疗中运用橡皮障隔离技术。比较两组总治疗时间和不良反应发生情况。结果两组患者的嵌体冠修复体在冠边缘、密合性、咬合关系等方面均良好。研究组总治疗时间(118.83±19.15)min,较对照组(141.26±11.74)min缩短,差异有统计学意义(P<0.05);研究组无不良反应发生,对照组发生1(3.33%)例不良反应。结论橡皮障隔离技术可有效缩短椅旁CAD/CAM瓷嵌体修复治疗时间。 展开更多
关键词 橡皮障隔离技术 计算机辅助设计 计算机辅助制作 瓷嵌体修复 口腔护理
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CAD/CAM氧化锆全瓷冠与金属烤瓷冠在牙冠修复中的应用效果
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作者 胡莲 郭海鑫 蔡晓亚 《河南医学研究》 CAS 2024年第20期3746-3749,共4页
目的 探究计算机辅助设计/计算机辅助制作(CAD/CAM)氧化锆全瓷冠、金属烤瓷冠对牙冠修复的效果。方法 回顾性选取平顶山市第二人民医院2021年9月至2023年9月收治的85例牙冠修复患者的病历资料,根据修复方案分为两组(对照组42例,研究组43... 目的 探究计算机辅助设计/计算机辅助制作(CAD/CAM)氧化锆全瓷冠、金属烤瓷冠对牙冠修复的效果。方法 回顾性选取平顶山市第二人民医院2021年9月至2023年9月收治的85例牙冠修复患者的病历资料,根据修复方案分为两组(对照组42例,研究组43例)。对照组使用钴铬合金烤瓷冠,研究组使用CAD/CAM氧化锆全瓷冠。对比两组修复效果、牙周指标[探诊深度(PD)、龈沟出血指数(SBI)、菌斑指数(PLI)]、龈沟液中基质金属蛋白酶(MMPs)[基质金属蛋白酶-2(MMP-2)、MMP-8、MMP-9]水平及患者修复满意度。结果 研究组颜色与邻牙匹配合格率较对照组高(P<0.05);两组外形合格率均为100%,两组边缘着色及完整性合格率相比,差异无统计学意义(P>0.05);与修复前对比,修复2周、6个月后,两组PD、SBI、PLI、MMP-2、MMP-8、MMP-9水平均升高,且研究组低于对照组(P<0.05);修复3个月后,两组PD、SBI、PLI、MMP-2、MMP-8、MMP-9对比,差异无统计学意义(P>0.05);研究组修复满意度优于对照组(P<0.05)。结论 CAD/CAM氧化锆全瓷冠修复牙冠效果较好,对牙周组织刺激较小,患者满意度高。 展开更多
关键词 计算机辅助设计/计算机辅助制作 氧化锆全瓷冠 金属烤瓷冠 基质金属蛋白酶
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3D椅旁CAD/CAM全瓷高嵌体修复后牙大面积缺损的临床疗效研究
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作者 邰叶 张为新 戴海峰 《中国美容医学》 CAS 2024年第3期127-130,共4页
目的:探讨3D椅旁计算机辅助设计和制作(Computer aided design/manufacturing,CAD/CAM)全瓷高嵌体修复后牙大面积缺损的临床效果。方法:回顾性分析2019年9月-2022年10月笔者医院收治的86例后牙大面积缺损患者,依据治疗方式不同分成对照... 目的:探讨3D椅旁计算机辅助设计和制作(Computer aided design/manufacturing,CAD/CAM)全瓷高嵌体修复后牙大面积缺损的临床效果。方法:回顾性分析2019年9月-2022年10月笔者医院收治的86例后牙大面积缺损患者,依据治疗方式不同分成对照组(传统印模全瓷修复)41例和观察组(CAD/CAM全瓷高嵌体修复)45例,记录两组临床指标,分析两组术后即刻与术后6个月的修复效果,观察两组修复前与修复后6个月龈沟液量与碱性磷酸酶(Alkaline phosphatase,ALP)、天门冬氨酸转氨酶(Aspartate transaminase,AST)水平及口腔卫生指数。结果:观察组平均备牙时间、平均调牙合时间均短于对照组,差异具有统计学意义(P<0.05);修复即刻,两组修复效果比较差异无统计学意义(P>0.05);修复6个月后,观察组边缘密合性、修复体完整性、修复体颜色、继发龋、修复体形态及食物嵌塞A级患者占比均高于对照组,差异具有统计学意义(P<0.05);修复6个月后,观察组龈沟液量、ALP及AST水平均低于对照组,简化牙石指数、简化软垢指数得分低于对照组,差异具有统计学意义(P<0.05)。结论:对于后牙大面积缺损患者使用3D椅旁CAD/CAM全瓷高嵌体修复美学效果较高,且操作时间短,对牙周组织影响小,有利于口腔卫生。 展开更多
关键词 计算机辅助设计和制作 高嵌体修复 后牙 大面积缺损 美学效果
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THE RESEARCH OF MANUFACTURING TOOLS(FIXTURES) PLANNING FOR ARMOURED FLEXIBLE CONVEYOR (AFC) USING CAD TECHNIQUE
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作者 曾钢 蒋桂荣 李凤军 《Journal of Coal Science & Engineering(China)》 1999年第2期67-72,共6页
The deepth and width of CAD application in coal mining equipments need promote furtherly. The information stream method is applied as the main clue to deal with the related technology and problems in research of manuf... The deepth and width of CAD application in coal mining equipments need promote furtherly. The information stream method is applied as the main clue to deal with the related technology and problems in research of manufacturing tools (Fixtures) planning for AFC (mining scraper bars conveyor) using CAD technique. 展开更多
关键词 computer aided manufacturing equipment planning machine feature of part fixtures planning potential function
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CAD/CAM树脂暂时冠在乳前牙大面积缺损修复中的应用效果分析
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作者 刘东亚 于雪菲 田慧萍 《中国美容医学》 CAS 2024年第4期157-159,178,共4页
目的:分析计算机辅助设计与制造(Computer aided design/Computer aided manufacturing,CAD/CAM)树脂暂时冠修复乳前牙大面积缺损的疗效。方法:选取2018年2月-2023年6月于笔者医院进行治疗的108例乳前牙大面积缺损患儿为研究对象,依据... 目的:分析计算机辅助设计与制造(Computer aided design/Computer aided manufacturing,CAD/CAM)树脂暂时冠修复乳前牙大面积缺损的疗效。方法:选取2018年2月-2023年6月于笔者医院进行治疗的108例乳前牙大面积缺损患儿为研究对象,依据入院先后顺序将其分为两组。对照组给予光固化复合树脂充填(n=54),观察组给予CAD/CAM树脂暂时冠修复(n=54),观察两组患儿的修复效果。结果:修复后3个月,两组缺损乳前牙修复体表面情况、色泽协调性、边缘密合度、继发龋比较差异均无统计学意义(P>0.05),修复后6个月,观察组缺损乳前牙修复体表面、色泽协调性、边缘密合度、继发龋有效率均高于对照组(P<0.05)。修复后3个月和6个月,两组缺损乳前牙牙龈炎症比较差异均无统计学意义(P>0.05)。结论:CAD/CAM树脂暂时冠在乳前牙大面积缺损修复中的效果较好,较光固化复合树脂充填更能够改善患儿远期预后。 展开更多
关键词 乳前牙 大面积缺损 计算机辅助设计与制造 树脂暂时冠 光固化复合树脂 修复
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数字化椅旁CAD/CAM制作高嵌体修复牙体缺损的效果
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作者 蔡丽锋 《中国民康医学》 2024年第4期73-76,共4页
目的:观察数字化椅旁计算机辅助设计/计算机辅助制作技术(CAD/CAM)制作高嵌体修复牙体缺损的效果。方法:选取2022年4月至2023年2月该院收治的80例牙体缺损患者进行前瞻性研究,按照随机数字表法将其分为对照组和研究组各40例。对照组采... 目的:观察数字化椅旁计算机辅助设计/计算机辅助制作技术(CAD/CAM)制作高嵌体修复牙体缺损的效果。方法:选取2022年4月至2023年2月该院收治的80例牙体缺损患者进行前瞻性研究,按照随机数字表法将其分为对照组和研究组各40例。对照组采用常规印模制作高嵌体修复,研究组采用数字化椅旁CAD/CAM制作高嵌体修复,比较两组修复成功率、治疗前后龈沟液炎性因子[中核因子κB受体活化因子(RANK)、巨噬细胞炎性蛋白-1α(MIP-1α)]水平、疼痛程度[数字疼痛评分法(NRS)]评分、牙周指标[牙龈指数(GI)、龈沟出血指数(SBI)、牙齿松动度(TM)、菌斑指数(PLI)]水平、咀嚼效率、咬合力和随访3个月内并发症发生率。结果:研究组修复成功率为93.02%(40/43),高于对照组的75.61%(31/41),差异有统计学意义(P<0.05);治疗后,研究组咀嚼效率、咬合力均高于对照组,并发症发生率和龈沟液RANK、MIP-1α水平,以及NRS、SBI、TM、GI、PLI评分均低于对照组,差异有统计学意义(P<0.05)。结论:数字化椅旁CAD/CAM制作高嵌体修复牙体缺损能够提高修复成功率,改善咀嚼功能和牙周功能,减轻疼痛和炎症刺激,降低并发症发生率,效果优于常规印模制作高嵌体修复。 展开更多
关键词 数字化椅旁计算机辅助设计/计算机辅助制作技术 常规印模 高嵌体 牙体缺损 龈沟液 炎性因子 并发症
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生物活性人工骨结合CAD/CAM技术重建颅骨板制作系统 被引量:12
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作者 陈德敏 刘义荣 +2 位作者 刘俊 袁建兵 王成焘 《生物医学工程与临床》 CAS 2005年第1期17-19,共3页
目的通过CAD/CAM技术和快速成型技术并结合生物活性人工骨材料的应用,建立个性化设计制造具有良好骨融合性的颅骨板制作系统。方法通过螺旋CT扫描、CAD三维重建成像、快速成型机加工,制成与患者颅骨缺损部位几何形态相同的个性化实体模... 目的通过CAD/CAM技术和快速成型技术并结合生物活性人工骨材料的应用,建立个性化设计制造具有良好骨融合性的颅骨板制作系统。方法通过螺旋CT扫描、CAD三维重建成像、快速成型机加工,制成与患者颅骨缺损部位几何形态相同的个性化实体模型,应用石膏翻模工艺和EH复合人工骨材料,制成患者骨修补治疗用颅骨板。结果CAD/CAM技术重建的人工骨颅骨板几何外形与骨缺损部位非常吻合,与健康侧对称,临床效果非常满意。结论生物活性人工骨结合CAD/CAM技术重建颅骨板制作系统为治疗颅骨缺损患者提供了一种新手段,可有效提高临床治疗效果和修复美学效果。 展开更多
关键词 骨板 颅骨缺损 人工骨 骨结合 治疗 患者 重建 新手 制作系统 几何
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CAD/CAM技术在义齿快速成形中的应用与发展 被引量:13
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作者 宋雅丽 李佳 +2 位作者 黄田 田彬 高平 《机械设计》 CSCD 北大核心 2004年第4期8-10,13-14,共5页
义齿计算机辅助设计与制作技术是先进制造技术与口腔医学相结合的产物。在设计与制造技术层面上分析了其各项基础单元技术和系统集成技术 ,包括原始信息采集、数据库建立、数据处理和数控加工技术及设备等 ,并指出进一步发展义齿CAD/CA... 义齿计算机辅助设计与制作技术是先进制造技术与口腔医学相结合的产物。在设计与制造技术层面上分析了其各项基础单元技术和系统集成技术 ,包括原始信息采集、数据库建立、数据处理和数控加工技术及设备等 ,并指出进一步发展义齿CAD/CAM系统的研究方向。 展开更多
关键词 义齿 快速成形 CAD cam 口腔医学 模型重构 数据处理 数控加工
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