Taking contents of Italian Renaissance gardens in the course Foreign Landscape Architecture History as an example,this paper introduces case teaching method and analyzes application of three-dimensional graphic analys...Taking contents of Italian Renaissance gardens in the course Foreign Landscape Architecture History as an example,this paper introduces case teaching method and analyzes application of three-dimensional graphic analysis method in case teaching in detail,aiming at typical cases of Italian Renaissance gardens,namely,Villa Medici,Fiesole and Villa d’Este,Tivoli.Three-dimensional graphic analysis can help students form intuitive feeling of terrain and space,further understand the typical gardening techniques of foreign gardens,so as to improve the teaching effect of landscape architecture history course.展开更多
The three-dimensional teaching mode is an integrated teaching mode,which integrates teaching design,teaching methods,teaching resources and student learning.In the English classroom,the three-dimensional teaching mode...The three-dimensional teaching mode is an integrated teaching mode,which integrates teaching design,teaching methods,teaching resources and student learning.In the English classroom,the three-dimensional teaching mode is used to make the English learning class full of vitality and to improve the effect of English classroom teaching.展开更多
BACKGROUND Ganglioneuroma is a rare,well-differentiated,slow-growing benign tumor of the peripheral nerves,with surgical resection being the only curative treatment.Surgical resection of ganglioneuromas encasing major...BACKGROUND Ganglioneuroma is a rare,well-differentiated,slow-growing benign tumor of the peripheral nerves,with surgical resection being the only curative treatment.Surgical resection of ganglioneuromas encasing major blood vessels remains a substantial clinical challenge.Traditionally,these cases often require open abdominal surgery or combined organ resections,and in some instances,the tumors are considered unresectable.Currently,no reports have described the resection of such tumors via laparoscopy.CASE SUMMARY A 35-year-old woman was admitted to our hospital after the incidental discovery of a retroperitoneal space-occupying lesion.Imaging revealed a mass with the celiac axis and superior mesenteric artery passing through it.A neurogenic tumor was suspected,with ganglioneuroma being the most likely diagnosis.Following comprehensive preoperative preparation,the retroperitoneal tumor was resected using a three-dimensional laparoscopy combined with an organ suspension technique.The surgical approach involved incising the tumor along the vascular axis and conducting meticulous,vascular-preserving tumor excision.The operation lasted approximately 458 minutes,with an estimated blood loss of 50 mL.The patient was discharged on the 8th postoperative day.A transient liver injury occurred after surgery but improved rapidly.After 11 months of postoperative follow-up,no complications or tumor recurrence were observed.CONCLUSION This case illustrates the feasibility of minimally invasive laparoscopic resection for retroperitoneal ganglioneuromas encasing major blood vessels.展开更多
Undergraduate medical immunology education is an important part of the basic course of medical higher education in our country.As an important basic course for medical students,medical immunology teaching has shown al...Undergraduate medical immunology education is an important part of the basic course of medical higher education in our country.As an important basic course for medical students,medical immunology teaching has shown all kinds of deficiencies in the teaching effect by using the traditional teaching model of classroom teaching.Combined with the teaching characteristics and teaching difficulties of medical immunology,it is found in the teaching practice that in the key stage of traditional teaching,the combination of PBL and RISE teaching method of case teaching can integrate the previous learning knowledge of medical immunology through students’independent learning,and stimulate students’interest in learning.It can improve students’ability to connect immunology theory with clinical diseases and public health immunological events,and improve students’comprehensive ability to further learn medical immunology knowledge and other related disciplines in the next stage.A good teaching effect has been achieved.展开更多
This study took the teaching practice of food-related majors in Chengdu University,a representative applied institution in China,as an example.Aligning with the course characteristics and educational objectives of Fun...This study took the teaching practice of food-related majors in Chengdu University,a representative applied institution in China,as an example.Aligning with the course characteristics and educational objectives of Functional Foods,it introduced the features of the BOPPPS teaching model and its implementation in course design.By incorporating research cases and presenting teaching examples,the steps and methods of BOPPPS-based teaching reform were explored while incorporating ideological and political elements into specialized instruction.This study provides insights and references for reforming other food-related courses and contributes to cultivating more food professionals with practical awareness and critical thinking.展开更多
As an important method of practical teaching,case-based teaching has become increasingly prominent in international Chinese language education.However,the development of case-based teaching for Chinese characters rema...As an important method of practical teaching,case-based teaching has become increasingly prominent in international Chinese language education.However,the development of case-based teaching for Chinese characters remains insufficient,with limited research outcomes,making it difficult to effectively support the teaching and research of Chinese character instruction.The establishment of a case library for international Chinese character teaching can provide a wealth of teaching cases,meeting the developmental needs of international Chinese language education in the new era.展开更多
Objective:To explore the effectiveness of multi-modal teaching based on an online case library in the education of gene methylation combined with spiral computed tomography(CT)screening for pulmonary ground-glass opac...Objective:To explore the effectiveness of multi-modal teaching based on an online case library in the education of gene methylation combined with spiral computed tomography(CT)screening for pulmonary ground-glass opacity(GGO)nodules.Methods:From October 2023 to April 2024,66 medical imaging students were selected and randomly divided into a control group and an observation group,each with 33 students.The control group received traditional lecture-based teaching,while the observation group was taught using a multi-modal teaching approach based on an online case library.Performance on assessments and teaching quality were analyzed between the two groups.Results:The observation group achieved higher scores in theoretical and practical knowledge compared to the control group(P<0.05).Additionally,the teaching quality scores were significantly higher in the observation group(P<0.05).Conclusion:Implementing multi-modal teaching based on an online case library for pulmonary GGO nodule screening with gene methylation combined with spiral CT can enhance students’knowledge acquisition,improve teaching quality,and have significant clinical application value.展开更多
By analyzing the dilemma encountered in practical teaching of new media advertising course in the digital economy era, this paper explores the teaching path of new media advertising course based on “three-dimensional...By analyzing the dilemma encountered in practical teaching of new media advertising course in the digital economy era, this paper explores the teaching path of new media advertising course based on “three-dimensional” practical teaching system, and believes that it is necessary to accurately determine talent training objectives, and construct the three dimensions of practical teaching, practical ability, and new media entrepreneurship and employment. Finally, the teaching countermeasures of practical teaching system based on three dimensions are put forward.展开更多
The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching c...The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching concepts and curriculum of Three-dimension Structure, and using new materials for spatial creativity training. This paper acclaims that only if the traditional teaching concepts of Three-dimension Structrue are abandoned, students' specialty fully used, the teaching effect will be improved effectively.展开更多
The calls for the employment demand are making a change to the rigid, backward teaching method. In this paper, the ＂three- dimensional teaching＂ as a very scientific, flexible, and efficient classroom teaching model...The calls for the employment demand are making a change to the rigid, backward teaching method. In this paper, the ＂three- dimensional teaching＂ as a very scientific, flexible, and efficient classroom teaching model currently is mainly discussed. Meanwhile, the dynamic internal composition of the ＂three-dimensional teaching＂ is mainly introduced from its three stages and three principles, and also the three-dimensional teaching reform plan is supported and promoted based on two advantages.展开更多
Purpose:Study the specific application effect of multi-dimensional and three-dimensional teaching in Geriatric Nursing teaching in the context of mass entrepreneurship and innovation.Methods:Respectively select 80 nur...Purpose:Study the specific application effect of multi-dimensional and three-dimensional teaching in Geriatric Nursing teaching in the context of mass entrepreneurship and innovation.Methods:Respectively select 80 nursing undergraduates of 2015 and 80 nursing undergraduates of 2014 in our school as the research object of the experimental group and the control group.In terms of Geriatric Nursing teaching,nursing students in the control group adopt traditional classroom teaching methods to carry out,while students in the experimental group adopt multi-dimensional and three-dimensional teaching in the context of mass entrepreneurship and innovation.Then observe and compare the geriatric nursing knowledge scoring as well as theory and practice assessment results in the two groups taught with different methods.Results:It's obvious that the scoring of nursing students in the experimental group is higher than those in the control group in respect of geriatric nursing knowledge,and statistical significance exists in the between-group differences(P<0.05).The nursing students in the experimental group perform obviously better than those in the control group in terms of the results of theory,practice and comprehensive assessment as well as total score,and statistical significance exists in the between-group differences(P<0.05).Conclusion:Implementing Geriatric Nursing teaching for higher education nursing undergraduates with multi-dimensional and three-dimensional teaching in the context of mass entrepreneurship and innovation can remarkably improve nursing students'cognitive level in geriatric nursing as well as their mastery degree of theoretical,practical and comprehensive knowledge.Thus,the multi-dimensional and three-dimensional teaching mode in the context of mass entrepreneurship and innovation makes 80 nursing undergraduates of 2015 in our school direct beneficiaries,which could be popularized and applied in medical colleges.展开更多
It can be seen that it is of great practical signi？ cance to evaluate practice teaching of tourism management specialty. Tourism management professional ability training objectives that is mainly refers to develop th...It can be seen that it is of great practical signi？ cance to evaluate practice teaching of tourism management specialty. Tourism management professional ability training objectives that is mainly refers to develop the tourism, ecology, tourism economics, tourism planning and development, management of travel agencies, tour guides, hotel management and tourism scenic spot management expertise, has complete professional ability has a skilled job skills in tourism industry to cultivate specialized personnel with high quality. The new local colleges and universities as an important role in higher education, entrepreneurship education in the process of exploring the important role of the gradually emerging and to explore the development of the entrepreneurship education in new local colleges and universities will help to cultivate pioneering talents extensively. This paper analyzes the issue from the essential perspective that will improve the general quality of the education.展开更多
The New English curriculum criteria suggest teaching English grammar based on the students’cognitive characteristics and emotional needs,helping them discover the rules and encouraging them to master the grammar by u...The New English curriculum criteria suggest teaching English grammar based on the students’cognitive characteristics and emotional needs,helping them discover the rules and encouraging them to master the grammar by using it.But due to the limited time in a lesson,many English teachers adopt a simple approach to teach grammar,in which students are required to memorize the rules first and then practice a lot.This approach is effec-展开更多
BACKGROUND Root canal retreatment is common after root canal therapy in clinical situations.Especially,completing the retreatment of variant root canals can be challenging.This is particularly true for the molars loca...BACKGROUND Root canal retreatment is common after root canal therapy in clinical situations.Especially,completing the retreatment of variant root canals can be challenging.This is particularly true for the molars located at the end of the dental arch.However,advancements in digital dental diagnosis and treatment techniques can solve these problems.Here,we describe a case of a maxillary second molar with a variant distobuccal root canal treated via a novel“inlay-guided endodontics”technique based on improved computer-generated programs.CASE SUMMARY A 63-year-old man complained of a defect in the maxillary left second molar.The tooth,diagnosed with post-treatment endodontic disease,was initially treated by conventional methods,which were ineffective.Our“inlay-guided endodontics”technique was subsequently adopted,with the establishment of a precise integrated three-dimensional(3D)plate model of cone-beam computed tomography data and a digital impression of the dentition.An optimal root canal approach was generated for the“virtual file”in the 3D model.The plate data were imported into a 3D printer and printed.With the help of the guide plate,the file was accurately placed into the cervical third of the distal root canal.The root canal and prosthodontic treatments successfully proceeded subsequently.CONCLUSION Our newly developed inlay guide plates may facilitate individualized and minimally invasive root canal treatment.展开更多
BACKGROUND Well-differentiated liposarcoma is the second most common pathologic type of retroperitoneal sarcoma.It is characterized by a huge mass,but multiple organ invasions are common.Surgery is the only treatment ...BACKGROUND Well-differentiated liposarcoma is the second most common pathologic type of retroperitoneal sarcoma.It is characterized by a huge mass,but multiple organ invasions are common.Surgery is the only treatment option for potential cure.Hyper-accuracy three-dimensional(3D)reconstruction is widely used in robotic partly nephrectomy owing to its ability to visualize overlapping anatomy.CASE SUMMARY A 54-year-old man was admitted for progressive abdominal distension over the preceding 2 mo.Computed tomography revealed a 32 cm×21 cm×12 cm lipomatous mass.Hyper-accuracy 3D reconstruction was performed because of the complex relationship between the mass and nearby tissue.The patient underwent surgical resection,and the tumor did not recur for over 16 mo.CONCLUSION Hyper-accuracy 3D reconstruction is useful for operative planning owing to its intuitiveness and precise determination of anatomical structures in both tumors and nearby tissues.展开更多
BACKGROUND Giant cell tumors(GCT)are most commonly seen in the distal femur.These tumors are uncommon in the small bones of the hand and feet,and a very few cases have been reported.A giant cell tumor of the talus is ...BACKGROUND Giant cell tumors(GCT)are most commonly seen in the distal femur.These tumors are uncommon in the small bones of the hand and feet,and a very few cases have been reported.A giant cell tumor of the talus is rarely seen clinically and could be a challenge to physicians.CASE SUMMARY We report a rare case of GCT of the talus in one patient who underwent a new reconstructive surgery technique using a three-dimensional(3D)printing talar prosthesis.The prosthesis shape was designed by tomographic image processing and segmentation using technology to match the intact side by mirror symmetry with 3D post-processing technologies.The patient recovered nearly full range of motion of the ankle after 6 mo.The visual analogue scale and American Orthopaedic Foot and Ankle Society scores were 1 and 89 points,respectively.CONCLUSION We demonstrated that 3D printing of a talar prosthesis is a beneficial option for GCT of the talus.展开更多
BACKGROUND Lateral facial clefts are atypical with a low incidence in the facial cleft spectrum.With the development of ultrasonography(US)prenatal screening,such facial malformations can be detected and diagnosed pre...BACKGROUND Lateral facial clefts are atypical with a low incidence in the facial cleft spectrum.With the development of ultrasonography(US)prenatal screening,such facial malformations can be detected and diagnosed prenatally rather than at birth.Although three-dimensional US(3DUS)can render the fetus'face via 3D reconstruction,the 3D images are displayed on two-dimensional screens without field depth,which impedes the understanding of untrained individuals.In contrast,a 3D-printed model of the fetus'face helps both parents and doctors develop a more comprehensive understanding of the facial malformation by creating more interactive aspects.Herein,we present an isolated lateral facial cleft case that was diagnosed via US combined with a 3D-printed model.CASE SUMMARY A 31-year-old G2P1 patient presented for routine prenatal screening at the 22nd wk of gestation.The coronal nostril-lip section of two-dimensional US(2DUS)demonstrated that the fetus'bilateral oral commissures were asymmetrical,and left oral commissure was abnormally wide.The left oblique-coronal section showed a cleft at the left oral commissure which extended to the left cheek.The results of 3DUS confirmed the cleft.Furthermore,we created a model of the fetal face using 3D printing technology,which clearly presented facial malformations.The fetus was diagnosed with a left lateral facial cleft,which was categorized as a No.7 facial cleft according to the Tessier facial cleft classification.The parents terminated the pregnancy at the 24th wk of gestation after parental counseling.CONCLUSION In the diagnostic course of the current case,in addition to the traditional application of 2D and 3DUS,we created a 3D-printed model of the fetus,which enhanced diagnostic evidence,benefited the education of junior doctors,improved parental counseling,and had the potential to guide surgical planning.展开更多
基金Sponsored by Beijing Natural Science Foundation (8202017)。
文摘Taking contents of Italian Renaissance gardens in the course Foreign Landscape Architecture History as an example,this paper introduces case teaching method and analyzes application of three-dimensional graphic analysis method in case teaching in detail,aiming at typical cases of Italian Renaissance gardens,namely,Villa Medici,Fiesole and Villa d’Este,Tivoli.Three-dimensional graphic analysis can help students form intuitive feeling of terrain and space,further understand the typical gardening techniques of foreign gardens,so as to improve the teaching effect of landscape architecture history course.
文摘The three-dimensional teaching mode is an integrated teaching mode,which integrates teaching design,teaching methods,teaching resources and student learning.In the English classroom,the three-dimensional teaching mode is used to make the English learning class full of vitality and to improve the effect of English classroom teaching.
基金Supported by the Zhejiang Medical Science and Technology Project,No.2022KY1325 and No.2023KY381Public Welfare Project of Jinhua Science and Technology Plan,No.2023-4-084Major Project of Jinhua Science and Technology Plan,No.2023-3-066.
文摘BACKGROUND Ganglioneuroma is a rare,well-differentiated,slow-growing benign tumor of the peripheral nerves,with surgical resection being the only curative treatment.Surgical resection of ganglioneuromas encasing major blood vessels remains a substantial clinical challenge.Traditionally,these cases often require open abdominal surgery or combined organ resections,and in some instances,the tumors are considered unresectable.Currently,no reports have described the resection of such tumors via laparoscopy.CASE SUMMARY A 35-year-old woman was admitted to our hospital after the incidental discovery of a retroperitoneal space-occupying lesion.Imaging revealed a mass with the celiac axis and superior mesenteric artery passing through it.A neurogenic tumor was suspected,with ganglioneuroma being the most likely diagnosis.Following comprehensive preoperative preparation,the retroperitoneal tumor was resected using a three-dimensional laparoscopy combined with an organ suspension technique.The surgical approach involved incising the tumor along the vascular axis and conducting meticulous,vascular-preserving tumor excision.The operation lasted approximately 458 minutes,with an estimated blood loss of 50 mL.The patient was discharged on the 8th postoperative day.A transient liver injury occurred after surgery but improved rapidly.After 11 months of postoperative follow-up,no complications or tumor recurrence were observed.CONCLUSION This case illustrates the feasibility of minimally invasive laparoscopic resection for retroperitoneal ganglioneuromas encasing major blood vessels.
基金Scientific Research of BSKY from Anhui Medical University(Project No.:XJ201935)。
文摘Undergraduate medical immunology education is an important part of the basic course of medical higher education in our country.As an important basic course for medical students,medical immunology teaching has shown all kinds of deficiencies in the teaching effect by using the traditional teaching model of classroom teaching.Combined with the teaching characteristics and teaching difficulties of medical immunology,it is found in the teaching practice that in the key stage of traditional teaching,the combination of PBL and RISE teaching method of case teaching can integrate the previous learning knowledge of medical immunology through students’independent learning,and stimulate students’interest in learning.It can improve students’ability to connect immunology theory with clinical diseases and public health immunological events,and improve students’comprehensive ability to further learn medical immunology knowledge and other related disciplines in the next stage.A good teaching effect has been achieved.
文摘This study took the teaching practice of food-related majors in Chengdu University,a representative applied institution in China,as an example.Aligning with the course characteristics and educational objectives of Functional Foods,it introduced the features of the BOPPPS teaching model and its implementation in course design.By incorporating research cases and presenting teaching examples,the steps and methods of BOPPPS-based teaching reform were explored while incorporating ideological and political elements into specialized instruction.This study provides insights and references for reforming other food-related courses and contributes to cultivating more food professionals with practical awareness and critical thinking.
基金the research result of the 2022 International Chinese Education Research Project“Construction and Research of International Chinese Character Teaching Case Library in Chinese Education”(22YH88D).
文摘As an important method of practical teaching,case-based teaching has become increasingly prominent in international Chinese language education.However,the development of case-based teaching for Chinese characters remains insufficient,with limited research outcomes,making it difficult to effectively support the teaching and research of Chinese character instruction.The establishment of a case library for international Chinese character teaching can provide a wealth of teaching cases,meeting the developmental needs of international Chinese language education in the new era.
基金supported by the Autonomous Region Industry-Education Integration Project“Application of DNA Methylation Combined with Spiral CT in the Screening of Pulmonary Ground-Glass Nodules and AI Recognition Systems in Teaching Practice”(Project No.2023210016)the“Open Project of the State Key Laboratory of High Incidence Diseases in Central Asia”(Project No.SKL-HIDCA-2021-28).
文摘Objective:To explore the effectiveness of multi-modal teaching based on an online case library in the education of gene methylation combined with spiral computed tomography(CT)screening for pulmonary ground-glass opacity(GGO)nodules.Methods:From October 2023 to April 2024,66 medical imaging students were selected and randomly divided into a control group and an observation group,each with 33 students.The control group received traditional lecture-based teaching,while the observation group was taught using a multi-modal teaching approach based on an online case library.Performance on assessments and teaching quality were analyzed between the two groups.Results:The observation group achieved higher scores in theoretical and practical knowledge compared to the control group(P<0.05).Additionally,the teaching quality scores were significantly higher in the observation group(P<0.05).Conclusion:Implementing multi-modal teaching based on an online case library for pulmonary GGO nodule screening with gene methylation combined with spiral CT can enhance students’knowledge acquisition,improve teaching quality,and have significant clinical application value.
基金Sponsored by 2022 “Tourism Industry Economic Teaching Innovation Team” of Taishan University。
文摘By analyzing the dilemma encountered in practical teaching of new media advertising course in the digital economy era, this paper explores the teaching path of new media advertising course based on “three-dimensional” practical teaching system, and believes that it is necessary to accurately determine talent training objectives, and construct the three dimensions of practical teaching, practical ability, and new media entrepreneurship and employment. Finally, the teaching countermeasures of practical teaching system based on three dimensions are put forward.
基金Sponsored by the First Session of Middle-aged and Young Key Teachers’and Presidents’Overseas Research Program of Jiangsu Colleges and Universities
文摘The teaching model of "creative Teaching + creative class = creative products + additional value" was proposed, so as to cultivate students' design creativity and practical ability by changing teaching concepts and curriculum of Three-dimension Structure, and using new materials for spatial creativity training. This paper acclaims that only if the traditional teaching concepts of Three-dimension Structrue are abandoned, students' specialty fully used, the teaching effect will be improved effectively.
文摘The calls for the employment demand are making a change to the rigid, backward teaching method. In this paper, the ＂three- dimensional teaching＂ as a very scientific, flexible, and efficient classroom teaching model currently is mainly discussed. Meanwhile, the dynamic internal composition of the ＂three-dimensional teaching＂ is mainly introduced from its three stages and three principles, and also the three-dimensional teaching reform plan is supported and promoted based on two advantages.
文摘Purpose:Study the specific application effect of multi-dimensional and three-dimensional teaching in Geriatric Nursing teaching in the context of mass entrepreneurship and innovation.Methods:Respectively select 80 nursing undergraduates of 2015 and 80 nursing undergraduates of 2014 in our school as the research object of the experimental group and the control group.In terms of Geriatric Nursing teaching,nursing students in the control group adopt traditional classroom teaching methods to carry out,while students in the experimental group adopt multi-dimensional and three-dimensional teaching in the context of mass entrepreneurship and innovation.Then observe and compare the geriatric nursing knowledge scoring as well as theory and practice assessment results in the two groups taught with different methods.Results:It's obvious that the scoring of nursing students in the experimental group is higher than those in the control group in respect of geriatric nursing knowledge,and statistical significance exists in the between-group differences(P<0.05).The nursing students in the experimental group perform obviously better than those in the control group in terms of the results of theory,practice and comprehensive assessment as well as total score,and statistical significance exists in the between-group differences(P<0.05).Conclusion:Implementing Geriatric Nursing teaching for higher education nursing undergraduates with multi-dimensional and three-dimensional teaching in the context of mass entrepreneurship and innovation can remarkably improve nursing students'cognitive level in geriatric nursing as well as their mastery degree of theoretical,practical and comprehensive knowledge.Thus,the multi-dimensional and three-dimensional teaching mode in the context of mass entrepreneurship and innovation makes 80 nursing undergraduates of 2015 in our school direct beneficiaries,which could be popularized and applied in medical colleges.
文摘It can be seen that it is of great practical signi？ cance to evaluate practice teaching of tourism management specialty. Tourism management professional ability training objectives that is mainly refers to develop the tourism, ecology, tourism economics, tourism planning and development, management of travel agencies, tour guides, hotel management and tourism scenic spot management expertise, has complete professional ability has a skilled job skills in tourism industry to cultivate specialized personnel with high quality. The new local colleges and universities as an important role in higher education, entrepreneurship education in the process of exploring the important role of the gradually emerging and to explore the development of the entrepreneurship education in new local colleges and universities will help to cultivate pioneering talents extensively. This paper analyzes the issue from the essential perspective that will improve the general quality of the education.
文摘The New English curriculum criteria suggest teaching English grammar based on the students’cognitive characteristics and emotional needs,helping them discover the rules and encouraging them to master the grammar by using it.But due to the limited time in a lesson,many English teachers adopt a simple approach to teach grammar,in which students are required to memorize the rules first and then practice a lot.This approach is effec-
基金the Youth Development Project of Army Military Medical University,No.2018XQN014the Clinical Innovation Project of Army Military Medical University,No.2019XLC2014the Science and Technology Foundation of Chongqing,China,No.cstc2014jcyjA10092.
文摘BACKGROUND Root canal retreatment is common after root canal therapy in clinical situations.Especially,completing the retreatment of variant root canals can be challenging.This is particularly true for the molars located at the end of the dental arch.However,advancements in digital dental diagnosis and treatment techniques can solve these problems.Here,we describe a case of a maxillary second molar with a variant distobuccal root canal treated via a novel“inlay-guided endodontics”technique based on improved computer-generated programs.CASE SUMMARY A 63-year-old man complained of a defect in the maxillary left second molar.The tooth,diagnosed with post-treatment endodontic disease,was initially treated by conventional methods,which were ineffective.Our“inlay-guided endodontics”technique was subsequently adopted,with the establishment of a precise integrated three-dimensional(3D)plate model of cone-beam computed tomography data and a digital impression of the dentition.An optimal root canal approach was generated for the“virtual file”in the 3D model.The plate data were imported into a 3D printer and printed.With the help of the guide plate,the file was accurately placed into the cervical third of the distal root canal.The root canal and prosthodontic treatments successfully proceeded subsequently.CONCLUSION Our newly developed inlay guide plates may facilitate individualized and minimally invasive root canal treatment.
基金the National Natural Science Foundation of China,No.81272833.
文摘BACKGROUND Well-differentiated liposarcoma is the second most common pathologic type of retroperitoneal sarcoma.It is characterized by a huge mass,but multiple organ invasions are common.Surgery is the only treatment option for potential cure.Hyper-accuracy three-dimensional(3D)reconstruction is widely used in robotic partly nephrectomy owing to its ability to visualize overlapping anatomy.CASE SUMMARY A 54-year-old man was admitted for progressive abdominal distension over the preceding 2 mo.Computed tomography revealed a 32 cm×21 cm×12 cm lipomatous mass.Hyper-accuracy 3D reconstruction was performed because of the complex relationship between the mass and nearby tissue.The patient underwent surgical resection,and the tumor did not recur for over 16 mo.CONCLUSION Hyper-accuracy 3D reconstruction is useful for operative planning owing to its intuitiveness and precise determination of anatomical structures in both tumors and nearby tissues.
文摘BACKGROUND Giant cell tumors(GCT)are most commonly seen in the distal femur.These tumors are uncommon in the small bones of the hand and feet,and a very few cases have been reported.A giant cell tumor of the talus is rarely seen clinically and could be a challenge to physicians.CASE SUMMARY We report a rare case of GCT of the talus in one patient who underwent a new reconstructive surgery technique using a three-dimensional(3D)printing talar prosthesis.The prosthesis shape was designed by tomographic image processing and segmentation using technology to match the intact side by mirror symmetry with 3D post-processing technologies.The patient recovered nearly full range of motion of the ankle after 6 mo.The visual analogue scale and American Orthopaedic Foot and Ankle Society scores were 1 and 89 points,respectively.CONCLUSION We demonstrated that 3D printing of a talar prosthesis is a beneficial option for GCT of the talus.
文摘BACKGROUND Lateral facial clefts are atypical with a low incidence in the facial cleft spectrum.With the development of ultrasonography(US)prenatal screening,such facial malformations can be detected and diagnosed prenatally rather than at birth.Although three-dimensional US(3DUS)can render the fetus'face via 3D reconstruction,the 3D images are displayed on two-dimensional screens without field depth,which impedes the understanding of untrained individuals.In contrast,a 3D-printed model of the fetus'face helps both parents and doctors develop a more comprehensive understanding of the facial malformation by creating more interactive aspects.Herein,we present an isolated lateral facial cleft case that was diagnosed via US combined with a 3D-printed model.CASE SUMMARY A 31-year-old G2P1 patient presented for routine prenatal screening at the 22nd wk of gestation.The coronal nostril-lip section of two-dimensional US(2DUS)demonstrated that the fetus'bilateral oral commissures were asymmetrical,and left oral commissure was abnormally wide.The left oblique-coronal section showed a cleft at the left oral commissure which extended to the left cheek.The results of 3DUS confirmed the cleft.Furthermore,we created a model of the fetal face using 3D printing technology,which clearly presented facial malformations.The fetus was diagnosed with a left lateral facial cleft,which was categorized as a No.7 facial cleft according to the Tessier facial cleft classification.The parents terminated the pregnancy at the 24th wk of gestation after parental counseling.CONCLUSION In the diagnostic course of the current case,in addition to the traditional application of 2D and 3DUS,we created a 3D-printed model of the fetus,which enhanced diagnostic evidence,benefited the education of junior doctors,improved parental counseling,and had the potential to guide surgical planning.
