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
目的为评价CEREC椅旁CAD/CAM系统制作的IPS e.max CAD玻璃陶瓷高嵌体应用于根管治疗后牙缺损病例的临床效果。方法选择42例根管治疗后牙,应用高嵌体的牙体预备方式,采用CEREC椅旁CAD/CAM修复系统和IPS e.max CAD玻璃陶瓷,即刻完成修复...目的为评价CEREC椅旁CAD/CAM系统制作的IPS e.max CAD玻璃陶瓷高嵌体应用于根管治疗后牙缺损病例的临床效果。方法选择42例根管治疗后牙,应用高嵌体的牙体预备方式,采用CEREC椅旁CAD/CAM修复系统和IPS e.max CAD玻璃陶瓷,即刻完成修复体并粘接;修复1年后复查,参照改良修正后的美国公众健康服务标准(US Public Health Service Criteria,USPHS),在修复体边缘染色、边缘继发龋、修复体边缘适合性、修复体崩瓷折裂或脱落、修复体颜色、牙龈健康状况、修复体邻接关系、患者满意度8个方面进行评价。结果修复体边缘染色C级病例1例,成功率97.6%;边缘继发龋C级病例1例,成功率97.6%;修复体邻接关系欠佳C级病例1例,成功率97.6%;在边缘适合性、修复体崩瓷折裂或脱落、修复体颜色、牙龈健康状况、患者满意方面表现优秀,成功率均为100%。结论椅旁CAD/CAM系统制作的IPS e.maxCAD高嵌体修复体在短期内可取得良好的修复效果。展开更多
Architectural Computer-Aided Design(CAD)is a basic course for architectural engineering majors in vocational colleges.The integration of competition into teaching will not only help stimulate the students’enthusiasm,...Architectural Computer-Aided Design(CAD)is a basic course for architectural engineering majors in vocational colleges.The integration of competition into teaching will not only help stimulate the students’enthusiasm,but also help them improve their professional skills.However,there are still some problems in the teaching of Architectural CAD.Therefore,teachers must continuously optimize the integration of competition content into Architectural CAD classes through various strategies,so as to give full play to the value of competition content in classes.We explored and analyzed the problems in the integration of competition content into Architectural CAD classes,and proposed specific strategies,in hopes of improving the quality of Architectural CAD teaching.展开更多
Architectural Computer-Aided Design(CAD)is a highly technical and practical course and is also a course where its knowledge can be directly applied in the working field,which is especially important for higher vocatio...Architectural Computer-Aided Design(CAD)is a highly technical and practical course and is also a course where its knowledge can be directly applied in the working field,which is especially important for higher vocational students majoring in architecture.In order to improve the teaching quality of this course,this paper proposes the integration of competition content into teaching under the based on the original syllabus.Therefore,the content of the“Reading and Drafting of Construction Drawings”competition is integrated into the teaching of this course,so as to realize the balanced development of teaching and competition,enhance students’professional skills and practical ability,and help students adapt to the development of the industry.With that,the goal of personnel training in higher vocational colleges can be achieved.展开更多
The aim of this study is to investigate the color change of different restoration thicknesses, backgrounds and resin cement colors on lithium disilicate and zirconium reinforced lithium silicate materials in vitro. In...The aim of this study is to investigate the color change of different restoration thicknesses, backgrounds and resin cement colors on lithium disilicate and zirconium reinforced lithium silicate materials in vitro. In this study, IPS emax CAD (LT C14) and Celtra Duo (LT C14) are used as full ceramic materials, and Variolink Esthetic LC (warm, neutral) used as resin cement and Tokuyama Estelite Sigma Quick (A3, A2) is used as composite materials. A total of 160 samples in the form of 40 pieces of 5 × 5 0.4 mm thick 40 pieces of 5 × 5 0.6 mm thick square discs from each of the all-ceramic materials in block form were obtained using a water jet device (DWJ1525-FA;Dardi International Corporation, Nanjing, China). Glass ceramic samples produced in 2 different thicknesses were cemented on 2 different backgrounds with 2 different resin types of cement. Color measurements of the samples before and after cementation were performed on a grey background with spectrophotometer Vita EasyShade V (Vita Zahnfabrik, Bad Sackingen, Germany) and color parameters (L*, a*, b*, ΔE) were calculated according to the CIE Lab (Commission Internationale de L’Eclairage) system. Average values for each group (ΔE) were not affected by ceramic type, material thickness, background color, resin cement color, and the interaction of these four variables (p > 0.05). When the triple interactions between the groups were examined, there were no statistically significant differences (p > 0.05). In the evaluation of pairwise interactions between two groups (material type-material thickness, material type-background color, and thickness of material-background interactions) statistically significant differences (p Implications: The material type, thickness, background and cement color used did not cause any statistically significant color change in lithium disilicate and zirconium-reinforced lithium silicate glass ceramic materials (p > 0.05).展开更多
With the progress of computer technology, CAD technique is urgent needed. In this paper, we conduct numerical and theoretical analysis and research on computer aided design technique and novel pattern for electronic a...With the progress of computer technology, CAD technique is urgent needed. In this paper, we conduct numerical and theoretical analysis and research on computer aided design technique and novel pattern for electronic architectural drawing and perspective. AUTOCAD drawing soRware because of its versatility and easy entry, in engineering has broad user base, but also because of the basis of general drawing software, often cannot directly use of the existing order efficiently complete professional drawing. We modify the current pattern and introduce our proposed pattern for advancement. The experiment proves the effectiveness of the pattern. In addition, we will conduct more insightful research in the future to nolish the current anoroach.展开更多
机械制图与 Auto CAD是中职机电专业的一门主干课程,本课程的特点是学生在学习机械制图中,既要掌握理论知识,又要运用计算机进行绘图,这给教师在教学中提出了很大的挑战。在实际教学中,可以采取将《机械制图》与《Auto CAD》进行有机融...机械制图与 Auto CAD是中职机电专业的一门主干课程,本课程的特点是学生在学习机械制图中,既要掌握理论知识,又要运用计算机进行绘图,这给教师在教学中提出了很大的挑战。在实际教学中,可以采取将《机械制图》与《Auto CAD》进行有机融合的做法,充分发挥 Auto CAD软件强大的绘图功能和三维造型功能,从三维实体建模到二维工程图绘制,从二维工程图到三维实体模型。通过“3D建模—编辑—修改—表达”这样一个螺旋上升的过程来完成课程教学任务。将二者融合教学是解决这一难题的有效途径。本文就如何将机械制图与 Auto CAD融合教学进行探讨,并以两个典型案例进行了分析和说明,以期对专业课程的教学有所裨益。展开更多
Auto CAD是个通用的计算机辅助设计和绘图软件包.Auto CAD软件包因其功能强大广泛应用于我国各领域,但在使用中也遇到一些问题,由于Auto CAD是一种通用软件,而我国各行业都有相应的设计规范和标准,为满足各行业的需求,提高绘图效率... Auto CAD是个通用的计算机辅助设计和绘图软件包.Auto CAD软件包因其功能强大广泛应用于我国各领域,但在使用中也遇到一些问题,由于Auto CAD是一种通用软件,而我国各行业都有相应的设计规范和标准,为满足各行业的需求,提高绘图效率,我们相应就要对CAD进行二次开发,Auto CAD的二次开发工作主要包括下列内容:……展开更多
文摘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.
文摘目的为评价CEREC椅旁CAD/CAM系统制作的IPS e.max CAD玻璃陶瓷高嵌体应用于根管治疗后牙缺损病例的临床效果。方法选择42例根管治疗后牙,应用高嵌体的牙体预备方式,采用CEREC椅旁CAD/CAM修复系统和IPS e.max CAD玻璃陶瓷,即刻完成修复体并粘接;修复1年后复查,参照改良修正后的美国公众健康服务标准(US Public Health Service Criteria,USPHS),在修复体边缘染色、边缘继发龋、修复体边缘适合性、修复体崩瓷折裂或脱落、修复体颜色、牙龈健康状况、修复体邻接关系、患者满意度8个方面进行评价。结果修复体边缘染色C级病例1例,成功率97.6%;边缘继发龋C级病例1例,成功率97.6%;修复体邻接关系欠佳C级病例1例,成功率97.6%;在边缘适合性、修复体崩瓷折裂或脱落、修复体颜色、牙龈健康状况、患者满意方面表现优秀,成功率均为100%。结论椅旁CAD/CAM系统制作的IPS e.maxCAD高嵌体修复体在短期内可取得良好的修复效果。
基金Project Name:Research on Teaching Reform and Practice of Architectural CAD Course in Higher Vocational Colleges Under the Mode of“Integration of Competition and Teaching”(Project No.:GZ223279)。
文摘Architectural Computer-Aided Design(CAD)is a basic course for architectural engineering majors in vocational colleges.The integration of competition into teaching will not only help stimulate the students’enthusiasm,but also help them improve their professional skills.However,there are still some problems in the teaching of Architectural CAD.Therefore,teachers must continuously optimize the integration of competition content into Architectural CAD classes through various strategies,so as to give full play to the value of competition content in classes.We explored and analyzed the problems in the integration of competition content into Architectural CAD classes,and proposed specific strategies,in hopes of improving the quality of Architectural CAD teaching.
基金Research on Teaching Reform and Practice of Architectural CAD Course in Higher Vocational Colleges under the Mode of Integration of Competition and Teaching(Project number:GZ223279)。
文摘Architectural Computer-Aided Design(CAD)is a highly technical and practical course and is also a course where its knowledge can be directly applied in the working field,which is especially important for higher vocational students majoring in architecture.In order to improve the teaching quality of this course,this paper proposes the integration of competition content into teaching under the based on the original syllabus.Therefore,the content of the“Reading and Drafting of Construction Drawings”competition is integrated into the teaching of this course,so as to realize the balanced development of teaching and competition,enhance students’professional skills and practical ability,and help students adapt to the development of the industry.With that,the goal of personnel training in higher vocational colleges can be achieved.
文摘The aim of this study is to investigate the color change of different restoration thicknesses, backgrounds and resin cement colors on lithium disilicate and zirconium reinforced lithium silicate materials in vitro. In this study, IPS emax CAD (LT C14) and Celtra Duo (LT C14) are used as full ceramic materials, and Variolink Esthetic LC (warm, neutral) used as resin cement and Tokuyama Estelite Sigma Quick (A3, A2) is used as composite materials. A total of 160 samples in the form of 40 pieces of 5 × 5 0.4 mm thick 40 pieces of 5 × 5 0.6 mm thick square discs from each of the all-ceramic materials in block form were obtained using a water jet device (DWJ1525-FA;Dardi International Corporation, Nanjing, China). Glass ceramic samples produced in 2 different thicknesses were cemented on 2 different backgrounds with 2 different resin types of cement. Color measurements of the samples before and after cementation were performed on a grey background with spectrophotometer Vita EasyShade V (Vita Zahnfabrik, Bad Sackingen, Germany) and color parameters (L*, a*, b*, ΔE) were calculated according to the CIE Lab (Commission Internationale de L’Eclairage) system. Average values for each group (ΔE) were not affected by ceramic type, material thickness, background color, resin cement color, and the interaction of these four variables (p > 0.05). When the triple interactions between the groups were examined, there were no statistically significant differences (p > 0.05). In the evaluation of pairwise interactions between two groups (material type-material thickness, material type-background color, and thickness of material-background interactions) statistically significant differences (p Implications: The material type, thickness, background and cement color used did not cause any statistically significant color change in lithium disilicate and zirconium-reinforced lithium silicate glass ceramic materials (p > 0.05).
文摘With the progress of computer technology, CAD technique is urgent needed. In this paper, we conduct numerical and theoretical analysis and research on computer aided design technique and novel pattern for electronic architectural drawing and perspective. AUTOCAD drawing soRware because of its versatility and easy entry, in engineering has broad user base, but also because of the basis of general drawing software, often cannot directly use of the existing order efficiently complete professional drawing. We modify the current pattern and introduce our proposed pattern for advancement. The experiment proves the effectiveness of the pattern. In addition, we will conduct more insightful research in the future to nolish the current anoroach.
文摘机械制图与 Auto CAD是中职机电专业的一门主干课程,本课程的特点是学生在学习机械制图中,既要掌握理论知识,又要运用计算机进行绘图,这给教师在教学中提出了很大的挑战。在实际教学中,可以采取将《机械制图》与《Auto CAD》进行有机融合的做法,充分发挥 Auto CAD软件强大的绘图功能和三维造型功能,从三维实体建模到二维工程图绘制,从二维工程图到三维实体模型。通过“3D建模—编辑—修改—表达”这样一个螺旋上升的过程来完成课程教学任务。将二者融合教学是解决这一难题的有效途径。本文就如何将机械制图与 Auto CAD融合教学进行探讨,并以两个典型案例进行了分析和说明,以期对专业课程的教学有所裨益。
