下颌阻生智齿拔除仿头模模型的建立

目的：使用口腔常用材料制作可反复使用的下颌阻生智齿拔除仿头模模型,并将其应用于临床前教学。方法：根据口腔常用材料特点、下颌阻生智齿的解剖特点及拔除的技术特点,设计并制作可反复使用的下颌阻生智齿拔除模型;将该模型固定于仿头模内,由口腔颌面外科临床医师及实习学生试用,采用问卷调查的方法对使用效果进行评估。结果：成功设计并制作出了下颌阻生智齿拔除模型;问卷调查结果显示该仿头模模型很好的模拟了临床下颌阻生智齿的拔除。结论：使用口腔常用材料可以成功的制作出下颌阻生智齿拔除模型,有助于临床实际操作。     

异色牙瓷贴面修复的遮色效果

目的:优选异色牙瓷贴面的遮色修复方法,研究不同厚度、不同透光度瓷贴面及组织面遮色涂层、遮色树脂水门汀粘固等处理方式对瓷贴面颜色的影响。方法:选取完整上颌中切牙4颗进行瓷贴面基牙预备,制作颜色为Vita A2的3种厚度(0.8 mm、1.0 mm、1.2 mm)和两种透明度(高透、低透)的热压铸造二硅酸锂玻璃陶瓷贴面各3个,共计72个瓷贴面。再将其中3颗牙冠表面涂色,模拟重度氟斑牙、重度四环素牙和重度异色死髓牙。用3种不同的试粘固用树脂水门汀糊剂(透明无色、不透明遮色、黄色)将每个贴面分别暂时粘固到相应牙面,用比色板和电子比色仪对每个瓷贴面的表面颜色(明度、饱和度、色相)进行比色和记录。将0.8 mm厚高透瓷贴面的组织面烧结遮色瓷涂层后粘固,再次进行比色并分析各遮色处理后颜色的差距。结果:瓷贴面厚度每增加0.2 mm,平均降低1个明度单位,饱和度变化不明显,与粘接剂种类无关。当瓷贴面厚度减小至0.8 mm时,即便使用低透瓷块,其遮色效果也不明显。透明树脂水门汀和黄色水门汀的遮色效果差,而遮色树脂水门汀可以降低平均2个明度单位,饱和度也有下降。组织面遮色涂层可以达到均匀一致,之后无论用何种颜色的树脂水门汀,其明度和饱和度均下降至2M1~2M1.5水平,对于不同异色牙有稳定的遮色效果。结论:对于变色牙的瓷贴面修复,加厚瓷贴面对于恢复自然透光度和色泽最为有效,也可使用组织面遮色涂层和遮色树脂水门汀来降低灰度和提高亮度。     

口腔门诊可重复使用牙椅照明灯柄防护套的研制与应用

介绍了口腔门诊可重复使用牙椅照明灯柄防护套的研制方法,以及防护套的性能检测和临床应用效果,证实灯柄防护套可经过浸泡及高温、高压蒸汽灭菌消毒后反复使用,符合医生临床操作习惯,并可在消毒后用于门诊手术等无菌要求较高的诊疗操作中。     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

比色板标准与非标准色标识别差异的初探

Objective To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.Methods Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study.Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light.Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded.Frequency of right match was analyzed using Monte Carlo exact probability-test Wilcoxin test was used to analyze the difference between each group on ranked data of value,chroma and hue.Results The shade matching accuracy of tabs of shade guide[45.9%(199/434)]was significantly higher than that of tabs out of shade guide[9.0%(39/434)].There was significant difference between the two kinds of tabs of ranked data of value[0.2 (0.1～0.3),0.4(0.4～0.5)]and chroma[0.2(0.1～0.4),0.5(0.4～0.6),P＜0.01 ],but there was no significant difference in hue data[0.3(0.1～0.4),0.3(0.1～0.4)].Conclusions The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide.To fulfill clinical need,more training is necessary.     

修复医技间的团队协同

修复医师和牙科技师的通力合作可以大大提升修复体的美观和功能。当彼此花时间去理解学习另一方的长处和困难．他们才可以制订出成功的治疗计划。诊断蜡型让医技对于面临的问题有一个三维的认识，并有助于患者理解治疗设计。医师制取的口内咬合记录协助技师正确的上骀架，正确的确定模型间关系。医师和技师对于制作临时修复体和主模型的材料达成共识后．能够获得更为精确和更具功能性的结果。牙体预备对于修复的成功是很关键的，因为好的边缘形态可以使技师更容易地制作出精确的修复体。一个治疗性蜡型可以向医师、技师和患者三方传递修复体的全面信息，以确保三方在最终修复体制作完成前调整外形和功能到最满意的程度。最终修复体的材料类型和色彩特性是最为重要的，这其中综合了医技双方的技术和经验。本文明确了修复治疗过程中通过医技团队协作以提高修复质量的若干环节。     

咬合板的临床应用特点

咬合板是可影响颌位关系的可摘式人工咬合面,又称垫,适用于颞下颌功能紊乱病的诊断和治疗,以及义齿修复过程中咬合位置的确定.咬合板作为可逆性手段,是咬合治疗第一阶段既保守治疗阶段使用的第一步装置.咬合板种类繁多,使用目的 和临床效果不同,临床医师尚缺乏对其临床适应证选择、规范化使用、治疗过程管理等方面的正确认识,也对其临...