对利用牙科手机进行体外口腔修复过程中,影响Vita Mark II齿科陶瓷修复后表面粗糙度的主要因素,进行了分析,确定口腔修复参数对表面粗糙度影响的主次关系。采用正交试验设计的方法进行试验设计,并用直观分析和方差分析两种方法进行数据...对利用牙科手机进行体外口腔修复过程中,影响Vita Mark II齿科陶瓷修复后表面粗糙度的主要因素,进行了分析,确定口腔修复参数对表面粗糙度影响的主次关系。采用正交试验设计的方法进行试验设计,并用直观分析和方差分析两种方法进行数据分析。结果表明:口腔修复深度对粗糙度算术平均偏差Ra值有非常显著的影响,车针进给速度对其无显著影响。结论:口腔修复深度为40μm、车针进给速度为30 mm/min时,粗糙度算术平均偏差Ra值最低。展开更多
目的:比较Crystaleye比色仪比色方法与Vita 3D Master比色板比色方法的临床应用效果。方法:对80例患者的103颗前牙采用随机分组的方法,分为两组,即比色仪组:40例患者(52颗前牙);比色板组:40例患者(51颗前牙)。分别采用Crystaleye比色仪...目的:比较Crystaleye比色仪比色方法与Vita 3D Master比色板比色方法的临床应用效果。方法:对80例患者的103颗前牙采用随机分组的方法,分为两组,即比色仪组:40例患者(52颗前牙);比色板组:40例患者(51颗前牙)。分别采用Crystaleye比色仪比色方法和Vita 3D Master比色板比色方法进行临床测色。制作修复体后,在口内再用Crystaleye比色仪对修复体和对照牙分别进行测色。分别计算两组修复体与对照牙的色差(△E)并评价患者对修复体颜色的满意度。结果:比色仪组的△E为(2.97±1.64),比色板组的△E为(6.07±2.28);t检验,差异有统计学意义(P<0.05)。比色仪组的患者满意度整体水平高于比色板组;x2检验,差异有统计学意义。结论:Crystaleye比色仪与Vita 3D Master比色板相比:比色结果更准确,患者满意度更高。展开更多
Bacillus megaterium as a companion strain in two-stage fermentation of vitamin C could secrete some active substances to spur growth of Gluconobacter oxydans to produce 2-KLG. In the fermenting system where Gluconobac...Bacillus megaterium as a companion strain in two-stage fermentation of vitamin C could secrete some active substances to spur growth of Gluconobacter oxydans to produce 2-KLG. In the fermenting system where Gluconobacter oxydans was combined with GB82-a mutated strain of B. megaterium by ion implantation, the amount of 2-KLG harvested was larger than that produced by the original B. megaterium BP52 being substituted for GB82. In this paper, we studied the effect of the active substances secreted by GB82 to enhance the capability of Gluconobacter oxydans to produce 2-KLG. The supernate of GB82 sampled at different cultivation times all had much more activity to spur Gluconobacter oxydans to yield 2-KLG than that of the original B. megaterium, which might be due to the genetic changes in the active components caused by ion implantation. Furthermore, the active substances of GB82's supernate would lose a part of its activity in extreme environments, which is typical of some proteins.展开更多
目的:研究联合法(诊室美白+家庭美白)和单独法(两次诊室美白)牙齿美白效果和牙齿敏感性。方法:选取2018年1月-2020年6月于西北大学附属医院/西安市第三医院进行牙齿美白患者32名,随机分为A、B两组,A组采用联合法(诊室美白+家庭美白)进...目的:研究联合法(诊室美白+家庭美白)和单独法(两次诊室美白)牙齿美白效果和牙齿敏感性。方法:选取2018年1月-2020年6月于西北大学附属医院/西安市第三医院进行牙齿美白患者32名,随机分为A、B两组,A组采用联合法(诊室美白+家庭美白)进行牙齿美白,B组采用单独法(两次诊室美白)。使用分光测色仪及Vita 3D Master比色板测量牙齿美白效果,使用4级语言测定评分记录牙齿敏感性。结果:联合法(诊室美白+家庭美白)和单独法(两次诊室美白),在牙齿美白效果、牙齿敏感性方面均无显著性差异。结论:无论采取联合法(诊室美白+家庭美白)还是单独法(两次诊室美白),美白效果及牙齿敏感性均较为相似。展开更多
文摘对利用牙科手机进行体外口腔修复过程中,影响Vita Mark II齿科陶瓷修复后表面粗糙度的主要因素,进行了分析,确定口腔修复参数对表面粗糙度影响的主次关系。采用正交试验设计的方法进行试验设计,并用直观分析和方差分析两种方法进行数据分析。结果表明:口腔修复深度对粗糙度算术平均偏差Ra值有非常显著的影响,车针进给速度对其无显著影响。结论:口腔修复深度为40μm、车针进给速度为30 mm/min时,粗糙度算术平均偏差Ra值最低。
文摘目的:比较Crystaleye比色仪比色方法与Vita 3D Master比色板比色方法的临床应用效果。方法:对80例患者的103颗前牙采用随机分组的方法,分为两组,即比色仪组:40例患者(52颗前牙);比色板组:40例患者(51颗前牙)。分别采用Crystaleye比色仪比色方法和Vita 3D Master比色板比色方法进行临床测色。制作修复体后,在口内再用Crystaleye比色仪对修复体和对照牙分别进行测色。分别计算两组修复体与对照牙的色差(△E)并评价患者对修复体颜色的满意度。结果:比色仪组的△E为(2.97±1.64),比色板组的△E为(6.07±2.28);t检验,差异有统计学意义(P<0.05)。比色仪组的患者满意度整体水平高于比色板组;x2检验,差异有统计学意义。结论:Crystaleye比色仪与Vita 3D Master比色板相比:比色结果更准确,患者满意度更高。
文摘Bacillus megaterium as a companion strain in two-stage fermentation of vitamin C could secrete some active substances to spur growth of Gluconobacter oxydans to produce 2-KLG. In the fermenting system where Gluconobacter oxydans was combined with GB82-a mutated strain of B. megaterium by ion implantation, the amount of 2-KLG harvested was larger than that produced by the original B. megaterium BP52 being substituted for GB82. In this paper, we studied the effect of the active substances secreted by GB82 to enhance the capability of Gluconobacter oxydans to produce 2-KLG. The supernate of GB82 sampled at different cultivation times all had much more activity to spur Gluconobacter oxydans to yield 2-KLG than that of the original B. megaterium, which might be due to the genetic changes in the active components caused by ion implantation. Furthermore, the active substances of GB82's supernate would lose a part of its activity in extreme environments, which is typical of some proteins.
文摘目的:研究联合法(诊室美白+家庭美白)和单独法(两次诊室美白)牙齿美白效果和牙齿敏感性。方法:选取2018年1月-2020年6月于西北大学附属医院/西安市第三医院进行牙齿美白患者32名,随机分为A、B两组,A组采用联合法(诊室美白+家庭美白)进行牙齿美白,B组采用单独法(两次诊室美白)。使用分光测色仪及Vita 3D Master比色板测量牙齿美白效果,使用4级语言测定评分记录牙齿敏感性。结果:联合法(诊室美白+家庭美白)和单独法(两次诊室美白),在牙齿美白效果、牙齿敏感性方面均无显著性差异。结论:无论采取联合法(诊室美白+家庭美白)还是单独法(两次诊室美白),美白效果及牙齿敏感性均较为相似。
