目的:观测钩状突尖端(uncinate process tip,UPT)、椎弓根峡部和颈神经之间的位置关系,为单孔分体脊柱内镜辅助颈椎前路椎间盘切除减压融合术中钩状突精准切除实现颈神经彻底减压提供临床数据参考。方法:选取2016年8月至2021年1月滨州...目的:观测钩状突尖端(uncinate process tip,UPT)、椎弓根峡部和颈神经之间的位置关系,为单孔分体脊柱内镜辅助颈椎前路椎间盘切除减压融合术中钩状突精准切除实现颈神经彻底减压提供临床数据参考。方法:选取2016年8月至2021年1月滨州医学院附属医院的26例神经根型颈椎病病人资料,并在Mimics21.0上观测C3~4至C7~T1相关参数:UPT分别至UPT所在矢状面的颈神经前缘前后距离(a)、UPT所在矢状面的颈神经下缘垂直距离(b)、颈神经起点上缘左右距离(c)、颈神经起点上缘垂直距离(d)、颈神经起点下缘垂直距离(e)、椎弓根峡部外侧缘前后距离(f)、椎弓根峡部外侧缘左右距离(g)、颈神经外展角(∠A)、前倾角(∠B)。结果:C_(3~4)至C_(7)~T_(1),同节段不同性别、不同侧别之间差异无统计学意义;同节段b、e之间差异无统计学意义,表明减压UPT所在矢状面的颈神经下缘即可实现颈神经起点下缘减压;随着C_(3~4)至C_(7)~T_(1)节段降低,a逐渐减小;b、d、e、g、∠A、∠B逐渐增加;c、f先增加后减小(P<0.05)。结论:以UPT作为重要骨性标志点,明确颈神经减压范围并精准切除钩状突。UPT向前(0.9±0.5)mm至(2.3±1.3)mm至椎弓根峡部外侧缘,向外磨透钩状突,可完成UPT至椎弓根区出口处颈神经腹侧减压;向上(5.5±2.1)mm至(8.0±3.0)mm、向内(1.1±0.5)mm至(1.9±0.9)mm分别磨除部分上位椎体和钩状突后外侧壁增生骨赘,可显露硬脊膜外侧缘和颈神经起点上缘,完成UPT至颈神经起点减压,为手术精准切除钩状突安全减压颈神经提供理论依据。展开更多
With the continuous advancement of technology,the application of 3D printing technology in the field of dental medicine is becoming increasingly widespread.This article aims to explore the current applications and fut...With the continuous advancement of technology,the application of 3D printing technology in the field of dental medicine is becoming increasingly widespread.This article aims to explore the current applications and future potential of 3D printing technology in dental medicine and to analyze its benefits and challenges.It first introduces the current state of 3D printing technology in dental implants,crowns,bridges,orthodontics,and maxillofacial surgery.It then discusses the potential applications of 3D printing technology in oral tissue engineering,drug delivery systems,personalized dental prosthetics,and surgical planning.Finally,it analyzes the benefits of 3D printing technology in dental medicine,such as improving treatment accuracy and patient comfort,and shortening treatment times,while also highlighting the challenges faced,such as costs,material choices,and technical limitations.This article aims to provide a reference for professionals in the field of dental medicine and to promote the further application and development of 3D printing technology in this area.展开更多
Human dental pulp stem cell transplantation has been shown to be an effective therapeutic strategy for spinal cord injury.However,whether the human dental pulp stem cell secretome can contribute to functional recovery...Human dental pulp stem cell transplantation has been shown to be an effective therapeutic strategy for spinal cord injury.However,whether the human dental pulp stem cell secretome can contribute to functional recovery after spinal cord injury remains unclear.In the present study,we established a rat model of spinal cord injury based on impact injury from a dropped weight and then intraperitoneally injected the rats with conditioned medium from human dental pulp stem cells.We found that the conditioned medium effectively promoted the recovery of sensory and motor functions in rats with spinal cord injury,decreased expression of the microglial pyroptosis markers NLRP3,GSDMD,caspase-1,and interleukin-1β,promoted axonal and myelin regeneration,and inhibited the formation of glial scars.In addition,in a lipopolysaccharide-induced BV2 microglia model,conditioned medium from human dental pulp stem cells protected cells from pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1βpathway.These results indicate that conditioned medium from human dental pulp stem cells can reduce microglial pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1βpathway,thereby promoting the recovery of neurological function after spinal cord injury.Therefore,conditioned medium from human dental pulp stem cells may become an alternative therapy for spinal cord injury.展开更多
AIM： To determine the distance between the branching point of the left colic artery （LCA） and the inferior mesenteric artery （IMA） by computed tomography （CT） scanning, for preoperative evaluation before laparo...AIM： To determine the distance between the branching point of the left colic artery （LCA） and the inferior mesenteric artery （IMA） by computed tomography （CT） scanning, for preoperative evaluation before laparoscopic colorectal operation. METHODS： From February 2004 to May 2005, 100 patients （63 men, 37 women） underwent angiography performed with a 16-scanner multi-detector row CT unit （Toshiba, Aquilion 16）. All images were analyzed on a workstation （AZE Ltd, Virtual Place Advance 300）. The distance from the root of the IMA to the bifurcation of the LCA was measured by curved multi-planar reconstruction on a workstation. RESULTS： The IMA could be visualized in all the cases, but the LCA was missing in two patients. The mean distance from the root of the IMA to the root of the LCA was 42.0 mm （range, 23.2-75.0 mm）. There were no differences in gender, arterial branching types, body weight, height, and body mass index. CONCLUSION： Volume-rendered 3D-CT is helpful to assess the vascular branching anatomy for laparoscopic surgery.展开更多
In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered...In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered at 1 350℃, 1 400 ℃, 1 450 ℃,1 500 ℃, respectively, then were treated by soaking in artificial saliva （65 ℃, pH=7） for two months. The treated specimens sintered at 1 350 ℃ showed there was no phase transformation but whose strength and toughnesswere significantly improved （P〈0.05）, while those sintered at 1 400 ℃- 1 500 ℃ revealed a small amount of phase transformation and insignificant mechanical reinforcement （P〉0.05）. No microcracks were detected but increment in lattice volume was found in all specimens. Lowering sintering temperature favors aging resistance and mechanical reinforcement of 3Y-TZP in a simulated oral environment.展开更多
文摘目的:观测钩状突尖端(uncinate process tip,UPT)、椎弓根峡部和颈神经之间的位置关系,为单孔分体脊柱内镜辅助颈椎前路椎间盘切除减压融合术中钩状突精准切除实现颈神经彻底减压提供临床数据参考。方法:选取2016年8月至2021年1月滨州医学院附属医院的26例神经根型颈椎病病人资料,并在Mimics21.0上观测C3~4至C7~T1相关参数:UPT分别至UPT所在矢状面的颈神经前缘前后距离(a)、UPT所在矢状面的颈神经下缘垂直距离(b)、颈神经起点上缘左右距离(c)、颈神经起点上缘垂直距离(d)、颈神经起点下缘垂直距离(e)、椎弓根峡部外侧缘前后距离(f)、椎弓根峡部外侧缘左右距离(g)、颈神经外展角(∠A)、前倾角(∠B)。结果:C_(3~4)至C_(7)~T_(1),同节段不同性别、不同侧别之间差异无统计学意义;同节段b、e之间差异无统计学意义,表明减压UPT所在矢状面的颈神经下缘即可实现颈神经起点下缘减压;随着C_(3~4)至C_(7)~T_(1)节段降低,a逐渐减小;b、d、e、g、∠A、∠B逐渐增加;c、f先增加后减小(P<0.05)。结论:以UPT作为重要骨性标志点,明确颈神经减压范围并精准切除钩状突。UPT向前(0.9±0.5)mm至(2.3±1.3)mm至椎弓根峡部外侧缘,向外磨透钩状突,可完成UPT至椎弓根区出口处颈神经腹侧减压;向上(5.5±2.1)mm至(8.0±3.0)mm、向内(1.1±0.5)mm至(1.9±0.9)mm分别磨除部分上位椎体和钩状突后外侧壁增生骨赘,可显露硬脊膜外侧缘和颈神经起点上缘,完成UPT至颈神经起点减压,为手术精准切除钩状突安全减压颈神经提供理论依据。
文摘With the continuous advancement of technology,the application of 3D printing technology in the field of dental medicine is becoming increasingly widespread.This article aims to explore the current applications and future potential of 3D printing technology in dental medicine and to analyze its benefits and challenges.It first introduces the current state of 3D printing technology in dental implants,crowns,bridges,orthodontics,and maxillofacial surgery.It then discusses the potential applications of 3D printing technology in oral tissue engineering,drug delivery systems,personalized dental prosthetics,and surgical planning.Finally,it analyzes the benefits of 3D printing technology in dental medicine,such as improving treatment accuracy and patient comfort,and shortening treatment times,while also highlighting the challenges faced,such as costs,material choices,and technical limitations.This article aims to provide a reference for professionals in the field of dental medicine and to promote the further application and development of 3D printing technology in this area.
基金supported by the Research Foundation of Technology Committee of Tongzhou District,No.KJ2019CX001(to SX).
文摘Human dental pulp stem cell transplantation has been shown to be an effective therapeutic strategy for spinal cord injury.However,whether the human dental pulp stem cell secretome can contribute to functional recovery after spinal cord injury remains unclear.In the present study,we established a rat model of spinal cord injury based on impact injury from a dropped weight and then intraperitoneally injected the rats with conditioned medium from human dental pulp stem cells.We found that the conditioned medium effectively promoted the recovery of sensory and motor functions in rats with spinal cord injury,decreased expression of the microglial pyroptosis markers NLRP3,GSDMD,caspase-1,and interleukin-1β,promoted axonal and myelin regeneration,and inhibited the formation of glial scars.In addition,in a lipopolysaccharide-induced BV2 microglia model,conditioned medium from human dental pulp stem cells protected cells from pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1βpathway.These results indicate that conditioned medium from human dental pulp stem cells can reduce microglial pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1βpathway,thereby promoting the recovery of neurological function after spinal cord injury.Therefore,conditioned medium from human dental pulp stem cells may become an alternative therapy for spinal cord injury.
基金Supported by Kobayashi Magobe Memorial Medical Foundation
文摘AIM： To determine the distance between the branching point of the left colic artery （LCA） and the inferior mesenteric artery （IMA） by computed tomography （CT） scanning, for preoperative evaluation before laparoscopic colorectal operation. METHODS： From February 2004 to May 2005, 100 patients （63 men, 37 women） underwent angiography performed with a 16-scanner multi-detector row CT unit （Toshiba, Aquilion 16）. All images were analyzed on a workstation （AZE Ltd, Virtual Place Advance 300）. The distance from the root of the IMA to the bifurcation of the LCA was measured by curved multi-planar reconstruction on a workstation. RESULTS： The IMA could be visualized in all the cases, but the LCA was missing in two patients. The mean distance from the root of the IMA to the root of the LCA was 42.0 mm （range, 23.2-75.0 mm）. There were no differences in gender, arterial branching types, body weight, height, and body mass index. CONCLUSION： Volume-rendered 3D-CT is helpful to assess the vascular branching anatomy for laparoscopic surgery.
基金Funded by the National High Technology Research and Development Program of China (No.2006AA03Z440)
文摘In order to investigate the effect of sintering temperature on aging properties and mechanical properties of 3Y-TZP dental ceramic in simulated oral environment, 3Y-TZP nanopowder compacts were pressurelessly sintered at 1 350℃, 1 400 ℃, 1 450 ℃,1 500 ℃, respectively, then were treated by soaking in artificial saliva （65 ℃, pH=7） for two months. The treated specimens sintered at 1 350 ℃ showed there was no phase transformation but whose strength and toughnesswere significantly improved （P〈0.05）, while those sintered at 1 400 ℃- 1 500 ℃ revealed a small amount of phase transformation and insignificant mechanical reinforcement （P〉0.05）. No microcracks were detected but increment in lattice volume was found in all specimens. Lowering sintering temperature favors aging resistance and mechanical reinforcement of 3Y-TZP in a simulated oral environment.
