{"name":"口腔医学技术初级（士）题库","level":"初级（士）","org":"国家卫生健康部门","count":300,"questions":[{"id":1,"type":"single","stem":"制作钴铬合金铸造支架时，模型上需要先填补的倒凹区域通常位于基牙的","options":["颊侧轴面角","舌侧轴面角","近缺隙侧轴面","远缺隙侧轴面"],"answer":[2],"explanation":"知识点：铸造支架共同就位道与倒凹填塞。正确项：近缺隙侧轴面（邻面板所在区域）需填塞倒凹以获得就位道。错误项：颊侧轴面角属于固位区通常保留倒凹；舌侧轴面角与就位关系较小；远缺隙侧轴面一般不作为填凹重点。","tier":"进阶"},{"id":2,"type":"single","stem":"用藻酸盐印模材制取工作印模后，灌注石膏前对印模的正确处理是","options":["流水冲洗后立即灌注","消毒液浸泡过夜再灌注","干燥后放置两小时灌注","冷水冲洗后静置半小时灌注"],"answer":[0],"explanation":"知识点：印模灌注时机。正确项：藻酸盐印模取出后流水冲洗并尽快灌注，防止失水变形。错误项：浸泡过夜会使印模吸水膨胀变形；干燥放置两小时会因失水收缩；静置半小时同样导致尺寸变化。","tier":"基础"},{"id":3,"type":"single","stem":"可卸代型制作时，在模型底面灌注的石膏层与牙列部分之间涂布分离剂的主要目的是","options":["防止代型与底座粘连","增加石膏表面强度","便于石膏充分膨胀","提高代型颜色对比度"],"answer":[0],"explanation":"知识点：可卸代型分离剂作用。正确项：涂分离剂使代型能从底座中顺利取出而不破损。错误项：分离剂不增强强度；不用于控制膨胀；与颜色对比无直接关系。","tier":"进阶"},{"id":4,"type":"single","stem":"全口义齿排牙时，上颌第一磨牙近中颊尖通常应位于","options":["下颌第一磨牙颊沟","下颌第一磨牙近中窝","下颌第二前磨牙远中窝","下颌第一磨牙远中颊尖"],"answer":[0],"explanation":"知识点：全口义齿排牙咬合关系。正确项：上颌第一磨牙近中颊尖对下颌第一磨牙颊沟，形成正常尖窝关系。错误项：近中窝、第二前磨牙远中窝、远中颊尖均不是标准对应位置。","tier":"基础"},{"id":5,"type":"single","stem":"制作烤瓷熔附金属冠时，金属基底冠的瓷结合面喷砂处理后还需进行的前处理是","options":["涂布遮色瓷后直接堆瓷","超声清洗后排气预氧化","酸蚀后立即涂分离剂","抛光后涂粘接剂再堆瓷"],"answer":[1],"explanation":"知识点：金瓷结合前处理。正确项：喷砂后需超声清洗去除残砂油脂，再排气预氧化形成氧化膜以利结合。错误项：遮色瓷前不做清洁会影响结合；酸蚀后涂分离剂会阻碍结合；抛光后涂粘接剂不适用于金瓷结合面。","tier":"进阶"},{"id":6,"type":"single","stem":"患者戴用可摘局部义齿后主诉咀嚼时基托与黏膜间有食物嵌塞，检查发现卡环固位良好，最可能的原因是","options":["基托边缘过长压迫黏膜","基托组织面与黏膜不贴合","人工牙排列偏颊侧","支架连接体位置过低"],"answer":[1],"explanation":"知识点：义齿食物嵌塞原因。正确项：基托组织面不贴合形成间隙导致食物进入。错误项：边缘过长主要表现为压痛；人工牙偏颊侧影响外观与咬合；连接体过低多引起压迫而非嵌塞。","tier":"挑战"},{"id":7,"type":"single","stem":"铸造全冠蜡型制作时，为补偿合金冷却收缩，蜡型在牙尖及边缘处的处理应为","options":["适当加厚并放大蜡型","按最终尺寸精确制作","边缘处减薄防止过厚","牙尖处开窗减轻重量"],"answer":[0],"explanation":"知识点：铸造收缩补偿。正确项：蜡型适当加厚放大可补偿合金冷却收缩，保证铸件尺寸。错误项：按最终尺寸制作会因收缩导致过小；边缘减薄会使边缘不密合；开窗破坏冠的完整性。","tier":"进阶"},{"id":8,"type":"single","stem":"在全口义齿制作中，确定颌位关系时使用哥特式弓描记的主要目的是","options":["测量垂直距离","确定水平颌位关系","记录息止颌间隙","判断基托边缘伸展"],"answer":[1],"explanation":"知识点：颌位关系记录。正确项：哥特式弓用于确定正中关系等水平颌位。错误项：垂直距离用其他方法测量；息止颌间隙为垂直向指标；基托边缘伸展与描记无关。","tier":"进阶"},{"id":9,"type":"single","stem":"某技师在给上颌总义齿基托抛光时发现基托边缘出现细小裂纹，最恰当的处理方式是","options":["直接戴入口内观察","磨除裂纹区域重新抛光","用自凝树脂填补裂纹","加热使裂纹自行闭合"],"answer":[1],"explanation":"知识点：基托裂纹处理。正确项：裂纹处强度已受损，应磨除后重新抛光或修补。错误项：直接戴入可能裂纹扩展；自凝填补结合力差易脱落；加热无法使裂纹闭合。","tier":"挑战"},{"id":10,"type":"single","stem":"弯制卡环时，为获得良好固位力，卡环臂进入基牙倒凹的深度一般应控制在","options":["0.1mm左右","0.25mm左右","0.75mm左右","1.0mm左右"],"answer":[1],"explanation":"知识点：卡环固位深度。正确项：钴铬合金弯制卡环通常进入倒凹约0.25mm。错误项：0.1mm固位力不足；0.75mm与1.0mm过深会导致取戴困难及基牙损伤。","tier":"进阶"},{"id":11,"type":"multi","stem":"关于全口义齿基托蜡型的处理，下列做法正确的有","options":["蜡型边缘应圆润光滑","蜡型厚度均匀一致","组织面需保留气泡以利缓冲","蜡型完成后可立即装盒"],"answer":[0,1],"explanation":"知识点：基托蜡型要求。正确项：边缘圆润光滑可减少黏膜刺激；厚度均匀保证强度与舒适。错误项：组织面气泡会造成不贴合；蜡型完成后需检查修整再装盒，不能直接装盒。","tier":"挑战"},{"id":12,"type":"single","stem":"全口义齿排牙时，上颌前牙切缘应位于切牙乳突中点前的距离约为","options":["4～6mm","8～10mm","12～14mm","16～18mm"],"answer":[1],"explanation":"知识点：全口义齿上前牙定位。正确项：上颌中切牙唇面应位于切牙乳突中点前约8～10mm，这是前牙美观和功能的位置参考。错误项：4～6mm偏近，会导致前牙过于后缩；12～14mm偏远，唇倾过度；16～18mm明显超出正常范围，影响唇部和发音。","tier":"基础"},{"id":13,"type":"single","stem":"可摘局部义齿铸造颌支托的颊舌向宽度约为磨牙颊舌径的","options":["四分之一","三分之一","二分之一","三分之二"],"answer":[1],"explanation":"知识点：支托形态要求。正确项：铸造颌支托颊舌向宽度约为磨牙颊舌径的1/3，既能传递颌力又不影响食物排溢。错误项：1/4过窄易折断；1/2过宽会覆盖牙尖斜面影响咬合；2/3明显过宽，妨碍对颌牙尖运动。","tier":"基础"},{"id":14,"type":"single","stem":"用自凝树脂修补热凝基托折裂时，在断面涂单体溶胀后，填胶加压应选择","options":["直接室温自然固化","放入40℃温水缓慢固化","放入100℃沸水快速固化","放入冰箱低温固化"],"answer":[1],"explanation":"知识点：自凝树脂修补基托的固化控制。正确项：40℃温水缓慢固化可使气泡少、结合好、变形小。错误项：室温自然固化太慢且易产生气泡；100℃沸水会使自凝树脂剧烈发泡、变色、变形；冰箱低温固化不完全，强度差。","tier":"进阶"},{"id":15,"type":"single","stem":"制作金瓷冠时，金属基底冠的瓷覆盖区唇侧应至少保留的金属厚度约为","options":["0.1～0.2mm","0.3～0.5mm","0.7～0.9mm","1.0～1.2mm"],"answer":[1],"explanation":"知识点：金瓷冠金属基底厚度。正确项：瓷覆盖区金属基底厚约0.3～0.5mm，可保证强度又不透出金属色。错误项：0.1～0.2mm过薄易变形、遮色差；0.7～0.9mm过厚会透金属色且咬合空间不足；1.0～1.2mm明显过厚，磨除牙体过多。","tier":"基础"},{"id":16,"type":"single","stem":"某技师在制作全口义齿时发现下颌模型舌侧边缘超出黏膜转折线约3mm，正确的处理是","options":["保留该边缘以增强封闭","磨除超出部分并重新形成边缘","将超出部分压向模型内侧","用蜡加厚整个舌侧边缘"],"answer":[1],"explanation":"知识点：全口义齿模型边缘修整。正确项：超出黏膜转折线的边缘必须磨除并重新形成，否则义齿压迫组织。错误项：保留会压迫舌侧黏膜；压向内侧仍会形成压迫区；加厚整个舌侧边缘会加重不适且不解决超界问题。","tier":"挑战"},{"id":17,"type":"single","stem":"琼脂印模材在口腔内取模时，最适宜的冷却方式是","options":["用冰水棉球快速冷却","用室温水棉球缓慢冷却","用热毛巾覆盖保温","自然暴露于空气中冷却"],"answer":[1],"explanation":"知识点：琼脂印模材使用。正确项：室温水棉球缓慢冷却可减少收缩变形，保持印模精度。错误项：冰水快速冷却会产生较大内应力和收缩；热毛巾保温会使琼脂无法凝固；自然空气冷却太慢且不均匀。","tier":"基础"},{"id":18,"type":"single","stem":"全口义齿基托磨光面应形成的形态是","options":["凸面形","凹面形","平面形","波浪形"],"answer":[1],"explanation":"知识点：全口义齿磨光面外形。正确项：磨光面应呈凹面，使唇颊舌肌力量转化为义齿稳定力。错误项：凸面会使肌肉推义齿脱位；平面缺乏肌肉辅助固位；波浪形不符合生理要求且易积存食物。","tier":"基础"},{"id":19,"type":"single","stem":"某患者戴用可摘局部义齿后，主诉咀嚼时基牙疼痛，检查发现卡环臂进入基牙倒凹过深，最可能的原因是","options":["卡环臂过松","卡环臂过紧","颌支托过宽","基托边缘过长"],"answer":[1],"explanation":"知识点：卡环臂与基牙疼痛的关系。正确项：卡环臂进入倒凹过深说明卡环过紧，咀嚼时对基牙产生侧向力引起疼痛。错误项：卡环过松不会引起疼痛；颌支托过宽主要影响咬合和食物排溢；基托边缘过长引起黏膜压痛而非基牙痛。","tier":"挑战"},{"id":20,"type":"single","stem":"瓷粉堆塑后烧结时，若升温速度过快，最可能出现的问题是","options"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扰、义齿翘动及关节不适。错误项：发音不清多与基托厚度或腭部形态有关；边缘过长表现为压痛溃疡；前牙开合多因颌位记录或排牙误差。","tier":"进阶"},{"id":40,"type":"single","stem":"技师在制作可摘局部义齿时，发现模型上卡环体部与基牙之间存在明显间隙，正确的处理方式是","options":["直接在该间隙处加蜡后铸造","重新取模并灌制工作模型","用自凝树脂填补间隙","将卡环体部压向基牙后继续"],"answer":[1],"explanation":"卡环体与基牙间应有贴合接触，出现明显间隙说明模型或设计有误，应重新取模灌模。错误项：加蜡铸造无法恢复贴合；自凝树脂填补强度不足且不密合；强行压卡环会变形。","tier":"挑战"},{"id":41,"type":"single","stem":"制作全口义齿时，确定垂直距离常用的方法是","options":["瞳孔至口角距离测量法","鼻底至颏底距离测量法","耳屏至鼻尖距离测量法","眉间至鼻底距离测量法"],"answer":[1],"explanation":"垂直距离常用鼻底至颏底的距离结合息止颌位来评估。错误项：瞳孔至口角、耳屏至鼻尖、眉间至鼻底均不是确定垂直距离的常规测量径路。","tier":"基础"},{"id":42,"type":"multi","stem":"关于可摘局部义齿铸造支架的喷砂处理，下列描述正确的有","options":["可清除铸件表面包埋材料残留","能降低铸件表面粗糙度","可提高铸件表面清洁度","喷砂压力越大处理效果越好","喷砂后无需再抛光即可戴用"],"answer":[0,2],"explanation":"喷砂可清除包埋材料残留并提高表面清洁度。错误项：喷砂会增加表面粗糙度而非降低；压力过大会损伤铸件边缘；喷砂后仍需抛光才能戴用。","tier":"挑战"},{"id":43,"type":"single","stem":"制作可摘局部义齿时，模型观测后确定义齿就位道，若基牙近缺隙侧倒凹较大，通常将模型向该侧倾斜的目的是","options":["增大近缺隙侧倒凹以增强卡环固位","减小近缺隙侧倒凹并使远缺隙侧倒凹适度增大","使各基牙倒凹深度完全一致便于设计双臂卡","消除全部倒凹使义齿与基牙紧密贴合"],"answer":[1],"explanation":"知识点为可摘局部义齿模型观测与就位道选择。将模型向缺隙侧倾斜可减小该侧基牙倒凹，同时使对侧倒凹增大，从而兼顾就位与固位。A项错在近缺隙侧倒凹过大会妨碍就位；C项错在倒凹深度受基牙形态限制无法通过倾斜完全一致；D项错在消除全部倒凹将失去卡环固位作用。","tier":"挑战"},{"id":44,"type":"single","stem":"用藻酸盐印模材料制取下颌无牙颌初印模时，托盘就位后应保持不动的时间主要取决于","options":["材料完全丧失流动性所需时间","材料开始凝固至终凝的时间","患者耐受张口的时间","材料调拌后膨胀的时间"],"answer":[1],"explanation":"知识点为藻酸盐印模材料的凝固特性与临床操作。托盘就位后需保持不动至材料终凝，即从开始凝固到终凝这段时间，过早取出会变形。A项错在丧失流动性时尚未获得足够强度；C项错在患者耐受时间不是材料固化依据；D项错在膨胀发生在凝固后吸水阶段，与保持不动无关。","tier":"进阶"},{"id":45,"type":"single","stem":"铸造金属全冠蜡型制作中，邻面接触区蜡的添加应在轴面蜡完成之后单独进行，主要原因是","options":["便于用蜡刀修整出解剖外形","防止轴面蜡收缩影响接触区位置","邻面接触区需要更高的蜡温","避免邻面接触区蜡与轴面蜡熔接不良"],"answer":[0],"explanation":"知识点为铸造全冠蜡型制作程序。轴面成形后再单独加邻面接触区蜡，便于用蜡刀修整出正确的接触区形态和位置。B项错在蜡收缩不是分步添加的主要理由；C项错在接触区不需要更高蜡温；D项错在分步添加反而可能增加熔接问题，不是主要原因。","tier":"进阶"},{"id":46,"type":"single","stem":"全口义齿排牙时，上颌后牙的牙合平面应大致平分颌间距离，若牙合平面偏高，最可能导致","options":["义齿固位力下降且咀嚼时翘动","前牙区出现明显开牙合","下颌前伸运动受阻","患者发音清晰度提高"],"answer":[0],"explanation":"知识点为全口义齿牙合平面位置与固位稳定关系。牙合平面偏高使牙合力偏离牙槽嵴顶，易导致义齿翘动和固位下降。B项错在前牙开牙合与后牙平面高度无直接关系；C项错在前伸运动主要受前牙和髁道影响；D项错在牙合平面偏高不会提高发音清晰度。","tier":"进阶"},{"id":47,"type":"single","stem":"在义齿基托树脂热处理固化过程中，将型盒从水浴中取出后应自然冷却至室温再开盒，若趁热开盒最可能造成","options":["基托树脂颜色变深","基托内气泡增多","基托变形或人工牙移位","基托与模型分离困难"],"answer":[2],"explanation":"知识点为热凝树脂热处理后的冷却与开盒操作。趁热开盒时树脂尚未完全硬化，易在应力释放中变形或使人工牙移位。A项错在颜色变化与开盒温度关系不大；B项错在气泡主要源于填塞或聚合过程；D项错在分离困难通常与分离剂有关。","tier":"进阶"},{"id":48,"type":"single","stem":"某技师在制作钴铬合金支架蜡型时，发现卡环臂蜡型表面有细小凹坑，最恰当的下一步处理是","options":["直接包埋铸造以减少修整时间","用蜡刀蘸少量蜡填补凹坑并烫平","用酒精棉球擦拭凹坑处消除","将整个蜡型重新制作"],"answer":[1],"explanation":"知识点为支架蜡型表面缺陷的修整。凹坑应局部补蜡并烫平，保证铸件表面完整。A项错在凹坑会复制到铸件上形成缺陷；C项错在酒精擦拭不能填补凹坑且可能破坏蜡型；D项错在局部缺陷无需整体重做。","tier":"挑战"},{"id":49,"type":"single","stem":"患者戴用全口义齿一周后主诉下颌义齿在说话时容易脱位，检查发现下颌义齿磨光面呈凹形且边缘伸展不足，正确的处理是","options":["磨改下颌义齿磨光面使其呈凸形","重衬下颌义齿基托组织面","加长下颌义齿边缘并抛光","调磨下颌后牙牙尖高度"],"answer":[2],"explanation":"知识点为全口义齿固位不良的检查与处理。边缘伸展不足使边缘封闭丧失，应加长边缘并抛光恢复封闭。A项错在磨光面凹形有利于固位，不应改为凸形；B项错在组织面重衬不解决边缘封闭不足；D项错在调磨牙尖不能改善边缘封闭问题。","tier":"挑战"},{"id":50,"type":"multi","stem":"关于可摘局部义齿铸造牙合支托的制作要求，下列叙述正确的有","options":["支托应位于基牙牙合面近远中边缘嵴处","支托宽度约为基牙颊舌径的1/3","支托凹底面应与基牙长轴垂直","支托厚度最薄处约为1.0mm","支托应伸入基牙倒凹区以增强固位"],"answer":[0,1,3],"explanation":"知识点为牙合支托的位置、形态和尺寸要求。支托位于边缘嵴、宽度约颊舌径1/3、最薄处约1.0mm均正确。C项错在支托凹底面应与基牙长轴呈一定角度而非垂直；E项错在支托不应进入倒凹区，进入倒凹会妨碍就位且不产生固位。","tier":"挑战"},{"id":51,"type":"single","stem":"制作可摘局部义齿时，模型观测线位于基牙颊侧倒凹区，若卡环臂尖端 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","stem":"义齿基托蜡型完成后，装盒时最常采用的装盒方法是","options":["正装法","反装法","混装法","倒装法"],"answer":[2],"explanation":"知识点为装盒方法。混装法将人工牙翻置于上半盒、基托蜡型留在下半盒，适用于多数可摘局部义齿和全口义齿；正装法多用于全口义齿，反装法多用于简单局部义齿，倒装法不是规范术语，故第一、二、四项错误。","tier":"基础"},{"id":125,"type":"single","stem":"热凝树脂基托热处理时，水浴加热至100℃后应维持的时间是","options":["15分钟","30分钟","45分钟","60分钟"],"answer":[1],"explanation":"知识点为热凝树脂热处理。水浴沸腾后维持30分钟可使树脂充分聚合；15分钟聚合不完全，45分钟和60分钟延长加热易产生气泡和变形，故第一、三、四项错误。","tier":"基础"},{"id":126,"type":"single","stem":"焊接义齿支架时，焊料应具备的性能是","options":["熔点高于被焊金属","熔点低于被焊金属","熔点与被焊金属相同","熔点高于包埋材料"],"answer":[1],"explanation":"知识点为焊接材料选择。焊料熔点必须低于被焊金属，才能在加热时先熔化而母材不熔；熔点高于或等于被焊金属会使母材先熔，故第一、三项错误；焊料熔点与包埋材料无直接要求，第四项错误。","tier":"基础"},{"id":127,"type":"single","stem":"在打磨义齿基托边缘时，正确的操作顺序是","options":["先用细砂石再用粗砂石","先用粗砂石再用细砂石","只用细砂石不用粗砂石","先用抛光轮再用砂石"],"answer":[1],"explanation":"知识点为打磨抛光程序。应先粗后细，先用粗砂石去多余材料，再用细砂石修整平滑；先细后粗会留下粗痕，故第一项错误；只用细砂石效率低且难去除多余材料，故第三项错误；抛光轮应在砂石修整之后使用，故第四项错误。","tier":"基础"},{"id":128,"type":"single","stem":"某技师制作上颌全口义齿时，发现模型腭部有气泡，最可能的原因是","options":["石膏调拌过稠","石膏调拌过稀","灌注时从一侧缓慢注入","模型震荡不足"],"answer":[3],"explanation":"知识点为模型灌注缺陷原因。模型震荡不足使气泡未排出，是腭部气泡的常见原因；调拌过稠或过稀影响流动性但不直接形成局部气泡，故第一、二项错误；从一侧缓慢注入有利于排气，不是气泡原因，故第三项错误。","tier":"挑战"},{"id":129,"type":"single","stem":"某患者戴用可摘局部义齿后主诉咀嚼时基托翘动，检查发现卡环固位臂过紧，正确的处理是","options":["调磨基托边缘","调整卡环固位臂","重衬基托组织面","增加支托高度"],"answer":[1],"explanation":"知识点为义齿翘动的处理。固位臂过紧会导致就位后翘动，应调整卡环固位臂；调磨基托边缘不解决固位臂过紧问题，故第一项错误；重衬基托组织面用于基托不密合，故第三项错误；增加支托高度会改变咬合，故第四项错误。","tier":"挑战"},{"id":130,"type":"single","stem":"某技师在铸造钴铬合金支架时，铸件表面出现较多金属瘤，最可能的原因是","options":["包埋材料透气性差","铸造温度过低","铸型焙烧时间不足","铸圈位置远离离心机"],"answer":[0],"explanation":"知识点为铸造缺陷原因。金属瘤常因包埋材料透气性差、气体排出不畅所致；铸造温度过低易致浇不足，故第二项错误；焙烧时间不足影响铸型强度与膨胀，故第三项错误；铸圈位置影响充填但非金属瘤主因，故第四项错误。","tier":"进阶"},{"id":131,"type":"single","stem":"制作钴铬合金铸造支架时，模型上的工作区与组织面之间需要留出的间隙通常应控制在","options":["0.1mm左右","0.3mm左右","0.5mm左右","0.8mm左右"],"answer":[2],"explanation":"知识点是铸造支架组织面缓冲间隙。钴铬合金支架组织面需留出约0.5mm间隙，以容纳印模材和模型材料的膨胀、保证就位且不压迫黏膜。0.1mm过小，就位后易压迫黏膜；0.3mm偏小，缓冲不足；0.8mm过大，支架与组织贴合差、易食物嵌塞。","tier":"进阶"},{"id":132,"type":"single","stem":"用藻酸盐印模材料制取工作印模时，托盘就位后应保持不动直至材料完全凝固，其主要目的是","options":["防止印模与托盘分离","避免印模材发生形变","防止患者出现恶心反应","减少气泡混入印模"],"answer":[1],"explanation":"知识点是藻酸盐印模的凝固特性。藻酸盐在凝固过程中受扰动会产生永久形变，因此就位后必须保持不动。防止与托盘分离靠托盘边缘和孔洞设计；恶心反应与就位深度和体位有关；气泡混入主要发生在调拌阶段。","tier":"进阶"},{"id":133,"type":"single","stem":"某技师在铸造全冠蜡型时发现邻面接触区蜡量不足，最恰当的处理方式是","options":["直接滴加蜡液后修整邻面","将整个蜡型加热后重新加压","在邻面加蜡后烫出接触区形态","用蜡刀刮除邻面后重新堆蜡"],"answer":[2],"explanation":"知识点是蜡型邻面接触区的加蜡修整。邻面加蜡后需用蜡刀烫出正确的接触区形态和位置，才能保证接触关系。直接滴加不修整形态不准；整体加热重压会破坏已修整好的其他部位；单纯刮除后重堆容易造成蜡型变形且效率低。","tier":"挑战"},{"id":134,"type":"single","stem":"可摘局部义齿的卡环臂在模型上弯制时，卡环臂尖端应位于基牙的","options":["倒凹区","非倒凹区","外形高点处","颈缘处"],"answer":[0],"explanation":"知识点是卡环臂的倒凹固位原理。卡环臂尖端进入倒凹区才能产生固位力，倒凹深度一般0.25~0.5mm。非倒凹区无固位作用；外形高点处卡环臂会妨碍就位；颈缘处易压迫牙龈且固位不良。","tier":"基础"},{"id":135,"type":"single","stem":"制作全口义齿时，人工牙排列的补偿曲线主要作用是","options":["提高义齿的美观效果","便于义齿的清洁","与前伸牙合运动相协调","增加义齿基托的强度"],"answer":[2],"explanation":"知识点是全口义齿牙合学。补偿曲线使人工牙牙尖斜面与髁道斜度相适应，保证前伸牙合时后牙能多点接触。美观与人工牙排列位置有关；清洁与牙合面形态关系不大；基托强度取决于基托材料和厚度。","tier":"基础"},{"id":136,"type":"single","stem":"某患者石膏模型在灌注24小时后仍能用手轻易捏碎，最可能的原因是","options":["石膏粉过期失效","水粉比例中水过多","调拌时间过长","模型未进行真空搅拌"],"answer":[1],"explanation":"知识点是石膏水粉比例对强度的影响。水过多会使石膏凝固后孔隙率增大、强度显著下降。石膏粉过期会影响凝固时间但强度下降程度不如水粉比明显；调拌时间过长会引入气泡但不会如此酥脆；未真空搅拌主要影响气泡和表面质量。","tier":"挑战"},{"id":137,"type":"single","stem":"某技师在打磨树脂基托时，最适宜使用的打磨方向是","options":["垂直于基托表面往复推拉","沿基托表面单向连续打磨","在基托表面做环形运动","从基托边缘向中心打磨"],"answer":[1],"explanation":"知识点是树脂基托打磨手法。沿表面单向连续打磨可避免局部过热和产生深划痕。垂直推拉和环形运动容易造成局部过热使树脂软化；从边缘向中心打磨不便于控制力度和方向。","tier":"基础"},{"id":138,"type":"single","stem":"制作烤瓷熔附金属冠时，金属基底冠的厚度一般要求为","options":["0.1~0.2mm","0.3~0.5mm","0.6~0.8mm","1.0~1.2mm"],"answer":[1],"explanation":"知识点是烤瓷熔附金属冠金属基底冠的厚度要求。金属基底冠一般0.3~0.5mm，既能保证强度又为瓷层留出足够空间。0.1~0.2mm过薄易变形；0.6~0.8mm过厚会挤压瓷层空间；1.0~1.2mm明显过厚，影响美观和牙体预备量。","tier":"基础"},{"id":139,"type":"single","stem":"某患者戴用可摘局部义齿后主诉咀嚼时义齿翘动，检查发现远中游离端基托与黏膜不密合，最可能的原因是","options":["卡环固位力过大","基托边缘过长","印模时功能整塑不足","人工牙排列偏颊侧"],"answer":[2],"explanation":"知识点是游离端义齿印模的功能整塑。功能整塑不足会导致印模未反映功能状态下的黏膜形态，基托与黏膜不密合引起翘动。卡环固位力过大会导致摘戴困难；基托边缘过长会引起压痛；人工牙偏颊侧影响咬合关系而非翘动。","tier":"挑战"},{"id":140,"type":"single","stem":"某技师在铸造纯钛支架时，使用的包埋材料应选择","options":["石膏系包埋材","磷酸盐系包埋材","硅酸乙酯系包埋材","氧化铝系包埋材"],"answer":[2],"explanation":"知识点是纯钛铸造的包埋材料选择。纯钛化学活性高，需使用硅酸乙酯系等与钛反应性小的包埋材料。石膏系和磷酸盐系在高温下会与钛反应导致表面污染；氧化铝系虽耐高温但与钛的热膨胀匹配性不如硅酸乙酯系。","tier":"基础"},{"id":141,"type":"multi","stem":"关于全口义齿基托边缘伸展范围，下列描述正确的有","options":["上颌基托后缘应伸展至腭小凹后2mm","下颌基托后缘应覆盖磨牙后垫全部","上颌基托颊侧应伸展至颊系带处","下颌基托舌侧应伸展至舌系带处","基托边缘应避开系带活动区"],"answer":[0,1,4],"explanation":"知识点是全口义齿基托边缘伸展范围。上颌后缘至腭小凹后2mm可形成后堤封闭；下颌后缘覆盖磨牙后垫全部可保证边缘封闭；基托边缘避开系带活动区是基本原则。上颌颊侧应伸展至颊系带处但不应超过，说”伸展至颊系带处“不准确；下颌舌侧应避开舌系带而非伸展至舌系带处。","tier":"挑战"},{"id":142,"type":"single","stem":"在制作可摘局部义齿时，模型观测线将基牙倒凹区分为不同区域，其中位于观测线龈方、靠近牙颈部的倒凹区通常被称为","options":["基牙倒凹","组织倒凹","骨性倒凹","系带倒凹"],"answer":[0],"explanation":"知识点为模型观测线与倒凹分类。基牙倒凹指位于观测线龈方、牙冠轴面靠近牙颈部的倒凹区，用于放置卡环固位臂。组织倒凹位于观测线龈方的软组织区域，不用于卡环固位。骨性倒凹指骨组织形成的倒凹，不是牙冠表面的分区。系带倒凹指系带附着处形成的倒凹，与基牙轴面倒凹不是同一概念。","tier":"进阶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产生大量气泡；印模浸水会稀释石膏影响强度。","tier":"基础"},{"id":161,"type":"multi","stem":"关于全口义齿排牙时后牙排列的要求，下列叙述正确的有","options":["后牙牙尖应与下颌牙槽嵴顶方向一致","上颌后牙应排列在牙槽嵴顶上","下颌后牙应排列在牙槽嵴顶稍颊侧","后牙应形成合适的补偿曲线和横𬌗曲线"],"answer":[0,3],"explanation":"知识点为全口义齿后牙排列原则。后牙牙尖方向应与下颌牙槽嵴顶一致以利于咬合力传导；后牙需形成补偿曲线和横𬌗曲线以平衡咬合；上颌后牙应排于牙槽嵴顶稍颊侧而非正顶上；下颌后牙应排于牙槽嵴顶上而非稍颊侧。","tier":"挑战"},{"id":162,"type":"single","stem":"制作钴铬合金铸造支架时，模型上的铸道口应设置在支架的哪个部位最有利于金属液充填？","options":["网状结构最厚处","网状结构最薄处","卡环尖端处","支托凹底处"],"answer":[0],"explanation":"知识点为铸造支架铸道设置原则。金属液应优先充满厚大部位并向薄处流动，故铸道口设在最厚处；网状最薄处易冷却堵塞，卡环尖端和支托凹底处体积小，设在彼处不利于补缩。","tier":"进阶"},{"id":163,"type":"single","stem":"制作上颌全口义齿时，若模型上腭皱襞区域被过度刮除，最可能影响的是？","options":["义齿基托边缘封闭","义齿辅助发音功能","义齿后堤区密合度","义齿基托的抛光效果"],"answer":[1],"explanation":"知识点为全口义齿基托的解剖标志。腭皱襞参与辅助发音，过度刮除会使义齿失去该形态；边缘封闭依靠边缘伸展和肌功能修整，后堤区密合靠后堤压印，抛光效果与刮除皱襞无关。","tier":"进阶"},{"id":164,"type":"single","stem":"某技师在制作可摘局部义齿时发现模型上缺牙区牙槽嵴有明显倒凹，为便于义齿就位，正确的处理方式是？","options":["将模型倒凹区填除后制作","将义齿基托边缘延伸入倒凹","在倒凹区加厚基托缓冲","直接将卡环放置在倒凹区"],"answer":[0],"explanation":"知识点为模型填倒凹。缺牙区牙槽嵴倒凹会阻碍义齿就位，应填除倒凹；基托边缘进入倒凹会无法就位或压迫黏膜，加厚基托缓冲不解决就位问题，卡环应放在观测线以下的倒凹区而非倒凹最深处。","tier":"挑战"},{"id":165,"type":"single","stem":"制作金属烤瓷冠时，在金瓷结合界面处若金属基底表面被手指油脂污染，最可能导致？","options":["瓷层颜色变深","金瓷结合力下降","金属基底变形","瓷层透明度增加"],"answer":[1],"explanation":"知识点为金瓷结合原理。金属表面污染会阻碍金瓷间化学结合和机械结合，导致结合力下降；颜色变深、变形、透明度变化与油脂污染无直接因果关系。","tier":"进阶"},{"id":166,"type":"single","stem":"某技师在打磨钴铬合金支架时，发现砂轮转速过高导致局部金属发蓝，此时最恰当的处理是？","options":["继续打磨至表面平整","降低转速并充分冷却后打磨","提高转速快速磨除变色层","改用粗砂轮加大压力打磨"],"answer":[1],"explanation":"知识点为金属打磨产热的影响。发蓝表示局部过热使金属表面氧化，应降低转速并冷却；继续或提高转速会加重氧化，粗砂轮加大压力也会产热更多。","tier":"挑战"},{"id":167,"type":"single","stem":"灌注石膏模型时，若调拌石膏粉水比中水过多，对模型性能的主要影响是？","options":["模型膨胀率增大","模型强度下降","模型凝固时间缩短","模型表面光泽增强"],"answer":[1],"explanation":"知识点为石膏水粉比与性能关系。水过多会使石膏凝固后孔隙率增加、强度下降；膨胀率主要受石膏种类和调拌条件影响，水多通常延长凝固时间，光泽不会增强。","tier":"进阶"},{"id":168,"type":"single","stem":"制作全口义齿时，需在模型上确定后堤区，其主要作用是？","options":["增强基托边缘强度","形成边缘封闭减少空气进入","引导下颌前伸运动","增加义齿基托厚度"],"answer":[1],"explanation":"知识点为全口义齿后堤区功能。后堤区通过轻微压迫腭部软组织形成边缘封闭，减少空气进入基托与黏膜之间；与基托强度、下颌运动引导、基托厚度无直接关系。","tier":"基础"},{"id":169,"type":"single","stem":"某技师在制作可摘局部义齿时，发现模型观测线上基牙颊侧近中倒凹较大，若将三臂卡环的卡臂尖放在该倒凹区，最可能的结果是？","options":["义齿固位力不足","义齿就位困难或无法就位","基牙受到过大侧向力","义齿基托与黏膜不密合"],"answer":[1],"explanation":"知识点为观测线与卡环就位关系。卡臂尖应放在观测线以下的倒凹区，但倒凹过深会使卡环进入倒凹时受阻，导致就位困难；固位力不足是倒凹过浅的表现，侧向力和基托密合与卡臂尖位置无直接关系。","tier":"挑战"},{"id":170,"type":"single","stem":"制作金属烤瓷冠时，在金属基底上堆塑瓷粉后，若烧结温度低于规定温度，最可能出现？","options":["瓷层出现气泡","瓷层与金属结合不良","瓷层颜色过深","金属基底变形"],"answer":[1],"explanation":"知识点为瓷烧结温度与结合。温度过低瓷粉未充分熔融，无法与金属形成良好结合；气泡多因温度过高或排气不当，颜色过深受金属底色或瓷层厚度影响，金属变形与烧结温度低关系不大。","tier":"进阶"},{"id":171,"type":"single","stem":"某技师在制作全口义齿时，发现模型上颌结节区倒凹较大，若直接在该区形成基托，最可能导致？","options":["义齿固位力增强","义齿就位困难","义齿基托边缘过长","义齿咬合关系异常"],"answer":[1],"explanation":"知识点为倒凹与就位。上颌结节区倒凹大会阻碍义齿就位，应缓冲或填除；固位力增强不是直接结果，边缘过长和咬合异常与倒凹无直接因果关系。","tier":"挑战"},{"id":172,"type":"single","stem":"制作可摘局部义齿时，若模型上舌侧倒凹未填除，义齿就位后最可能出现的临床问题是？","options":["义齿基托压迫舌侧黏膜","义齿固位力明显不足","义齿咬合高度降低","义齿基托颜色改变"],"answer":[0],"explanation":"知识点为倒凹填除与组织压迫。舌侧倒凹未填除会使基托进入倒凹区，就位后压迫舌侧黏膜；固位力不足与倒凹过浅有关，咬合高度和基托颜色与倒凹填除无关。","tier":"进阶"},{"id":173,"type":"single","stem":"制作钴铬合金铸造支架时，模型设计观察线后需要填倒凹，其主要目的是","options":["使支架顺利就位并避免压伤龈缘","增加支架与基牙的摩擦固位力","补偿合金铸造时的收缩量","防止铸造时熔融金属冲坏模型"],"answer":[0],"explanation":"填倒凹的知识点是为支架提供就位道并保护龈组织。正确项对在：填倒凹使硬区、龈缘区形成让开间隙，支架可顺利就位且不压迫龈缘。错误项：增加摩擦固位力靠卡环设计和基牙倒凹深度，不是填倒凹的目的；补偿铸造收缩靠模型放大或铸造后处理；防止冲坏模型靠包埋和浇注系统设计。","tier":"进阶"},{"id":174,"type":"single","stem":"可摘局部义齿基托蜡型完成后，装盒时选择反装法的关键依据是","options":["义齿的固位体是否位于模型的一侧","基托蜡型的厚度是否均匀","人工牙是否排列在牙槽嵴顶","模型石膏的凝固膨胀率大小"],"answer":[0],"explanation":"装盒正装与反装的选择依据是固位体（卡环、支托等）在模型上的位置。正确项对在：当固位体主要位于模型一侧、正装难以暴露时采用反装，便于充填和避免卡环变形。错误项：基托蜡型厚度影响充填量但不决定装盒方式；人工牙位置决定的是排牙和装盒时的分盒面，不是正反装的主要依据；石膏膨胀率与装盒方式无关。","tier":"基础"},{"id":175,"type":"single","stem":"全口义齿排牙时，上颌后牙牙合平面应位于","options":["与鼻翼耳屏线大致平行并位于其下方","与瞳孔连线平行并位于其上方","与眶下缘至耳屏连线重合","与下颌牙槽嵴顶平行并紧贴其上"],"answer":[0],"explanation":"全口义齿牙合平面定位的知识点。正确项对在：上颌牙合平面通常与鼻翼耳屏线（Camper线）大致平行，并位于其下方适当位置，符合解剖生理要求。错误项：瞳孔连线是前牙区参考，不是后牙牙合平面标准；眶下缘耳屏连线不是常规排牙参考线；牙合平面不能紧贴下颌牙槽嵴顶，否则影响舌活动空间。","tier":"基础"},{"id":176,"type":"single","stem":"在石膏模型上制作熔模时，蜡型表面出现粗糙颗粒，最可能的原因是","options":["蜡液温度过高导致蜡质分解","模型表面残留分离剂过多","蜡刀在蜡液凝固后反复刮动","铸道蜡线插入角度过于倾斜"],"answer":[0],"explanation":"熔模制作中蜡温控制的知识点。正确项对在：蜡液温度过高会使蜡质部分分解、碳化，凝固后表面呈现粗糙颗粒。错误项：分离剂过多主要影响蜡型与模型的密合或造成蜡型翘起，不是颗粒主因；凝固后刮动会造成划痕而非颗粒；铸道角度影响铸造，与蜡型表面粗糙无关。","tier":"进阶"},{"id":177,"type":"single","stem":"某技师在打磨钴铬合金支架时发现局部出现蓝黑色氧化色，正确的下一步处置是","options":["降低打磨压力并充分冷却后继续修整","提高转速以快速磨除变色层","改用粗粒度磨头一次磨到规定形态","在变色处直接涂布抛光膏抛光"],"answer":[0],"explanation":"合金打磨产热控制的情境判断。正确项对在：蓝黑色氧化色说明局部过热，应降低压力、充分冷却后再继续，避免合金性能改变。错误项：提高转速会加剧过热；粗粒度磨头一次磨到形会加大产热和磨削量；变色层未去除前直接抛光无法消除氧化层且影响后续抛光质量。","tier":"挑战"},{"id":178,"type":"single","stem":"灌注工作模型时，为减少气泡，最有效的操作是","options":["调拌石膏时沿同一方向缓慢搅拌","石膏粉倒入水中后静置再快速搅拌","调拌后立即将石膏从模型一端倾倒","使用高稠度石膏一次灌注完成"],"answer":[0],"explanation":"石膏调拌与灌注的知识点。正确项对在：沿同一方向缓慢搅拌可减少空气混入，从而减少气泡。错误项：静置再快速搅拌会带入更多空气；从一端倾倒易包裹气泡；高稠度石膏流动性差，反而更难排出气泡。","tier":"基础"},{"id":179,"type":"single","stem":"全口义齿试排牙时发现前牙唇侧过于丰满，最合理的调整是","options":["磨改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全贴合，正确的处理是","options":["调磨支托使其与支托窝贴合","调磨基牙支托窝加深","加厚基托边缘增加稳定","调整卡环臂进入倒凹深度"],"answer":[0],"explanation":"知识点：支托不贴合导致义齿翘动的处理。正确项对：调磨支托使其与支托窝密合，消除翘动。错误项：调磨基牙支托窝属不可逆损伤基牙；加厚基托边缘不解决翘动；卡环臂深度与翘动无直接关系。","tier":"挑战"},{"id":198,"type":"single","stem":"制作全口义齿个别托盘时，用自凝树脂在模型上压制托盘，其边缘应比义齿基托边缘","options":["短2至3毫米","长2至3毫米","等长无差别","长5至6毫米"],"answer":[0],"explanation":"知识点：个别托盘边缘长度设计。正确项对：个别托盘边缘应短于义齿基托边缘2至3毫米，为功能整塑留出空间。错误项：过长会限制边缘整塑；等长无法整塑；长5至6毫米过长明显。","tier":"进阶"},{"id":199,"type":"multi","stem":"影响全口义齿固位的因素中，下列哪些属于义齿本身可调整的因素","options":["基托边缘的伸展范围","基托组织面的密合度","患者唾液黏稠度","咬合面的牙尖斜度","患者牙槽嵴吸收程度"],"answer":[0,1,3],"explanation":"知识点：全口义齿固位的影响因素分类。正确项对：基托边缘伸展、组织面密合度、咬合面牙尖斜度均属技师可制作的义齿因素。错误项：唾液黏稠度是患者生理条件；牙槽嵴吸收程度是患者解剖条件，均非义齿本身可调整。","tier":"挑战"},{"id":200,"type":"single","stem":"制作可摘局部义齿时，模型观测后确定就位道，若基牙近缺隙侧倒凹较大而远缺隙侧倒凹较小，常选择的就位道方向是","options":["由近缺隙侧向远缺隙侧倾斜就位","由远缺隙侧向近缺隙侧倾斜就位","垂直于牙合平面平行就位","由舌侧向颊侧倾斜就位"],"answer":[1],"explanation":"知识点为可摘局部义齿就位道选择。当基牙近缺隙侧倒凹大、远缺隙侧倒凹小时，应使模型向远缺隙侧倾斜，让就位道从远缺隙侧进入，以减小近缺隙侧倒凹、避免卡环进入过深。A项方向相反会加大近缺隙侧倒凹；C项平行就位不能兼顾两侧倒凹差异；D项颊舌向倾斜不针对缺隙侧倒凹分布。","tier":"进阶"},{"id":201,"type":"single","stem":"铸造全冠蜡型制作中，为补偿合金冷却收缩，蜡型在牙尖及边缘处应","options":["按最终尺寸精确雕刻不再加放","整体均匀加放0.1毫米","仅在轴面加放0.2毫米","仅在牙合面加放0.3毫米"],"answer":[1],"explanation":"知识点为铸造收缩补偿。合金从液态冷却到室温会产生线收缩，蜡型需整体均匀加放一定厚度以补偿，通常为0.1毫米左右。A项不加放会导致铸件过小；C项仅轴面加放会使牙合面不足；D项仅牙合面加放会使轴面过紧。","tier":"进阶"},{"id":202,"type":"single","stem":"热凝树脂基托热处理时，将型盒从室温升至100℃并维持一段时间后，应采取的冷却方式是","options":["立即投入冷水中快速冷却","随型盒自然缓慢冷却至室温","取出基托后立即用冷水冲淋","放入冰箱冷冻室加速定型"],"answer":[1],"explanation":"知识点为热凝树脂热处理后的冷却。应随型盒自然缓慢冷却，使树脂内部应力缓慢释放，避免基托变形或产生气泡。A、C项骤冷会使基托翘曲变形；D项冷冻急冷同样引起内应力集中导致变形。","tier":"进阶"},{"id":203,"type":"single","stem":"在模型上弯制卡环时，不锈钢丝卡环臂进入基牙倒凹区的深度一般应控制在","options":["0.01毫米以内","0.25毫米左右","0.75毫米左右","1.5毫米以上"],"answer":[1],"explanation":"知识点为卡环臂倒凹深度。铸造或弯制卡环臂的弹性部分应进入倒凹约0.25毫米，既能提供固位又便于摘戴。A项过浅固位力不足；C、D项过深会使摘戴困难并损伤基牙。","tier":"进阶"},{"id":204,"type":"single","stem":"可摘局部义齿的间接固位体主要作用是","options":["直接卡抱基牙防止义齿下沉","防止义齿沿支点线翘动和旋转","增加基托与黏膜的吸附力","代替卡环提供主要固位力"],"answer":[1],"explanation":"知识点为间接固位体功能。间接固位体位于支点线对侧，防止义齿沿支点线翘动、旋转和摆动。A项是直接固位体（卡环）的作用；C项是基托与黏膜的物理作用；D项间接固位体不承担主要固位力。","tier":"基础"},{"id":205,"type":"single","stem":"烤瓷熔附金属冠制作中，金属基底冠的瓷结合面喷砂处理的主要目的是","options":["增加金属表面粗糙度以提高机械结合","去除金属表面的氧化膜使瓷易脱落","降低金属热膨胀系数以匹配瓷","使金属表面形成蜂窝状便于瓷流入"],"answer":[0],"explanation":"知识点为金瓷结合机制。喷砂使金属表面粗糙，增加瓷与金属的机械锁结面积。B项去氧化膜后应再形成适当氧化层，且目的是增强而非使瓷脱落；C项喷砂不改变热膨胀系数；D项蜂窝状过度粗糙反而不利于润湿结合。","tier":"进阶"},{"id":206,"type":"single","stem":"患者缺牙区牙槽嵴吸收严重呈刃状，制作全口义齿时对该区域的处理应为","options":["缓冲该区基托组织面以减轻压痛","加厚该区基托以增加支持","在该区增加人造牙排列","降低该区基托边缘伸展"],"answer":[0],"explanation":"知识点为全口义齿基托缓冲。刃状牙槽嵴覆盖黏膜薄，受力易压痛，应在模型上刮除相应部位形成缓冲。B项加厚基托会加重压痛；C项排牙不解决支持问题；D项降低边缘伸展会导致边缘封闭丧失。","tier":"进阶"},{"id":207,"type":"single","stem":"某患者戴用可摘局部义齿后主诉咀嚼时义齿前后翘动，检查发现卡环固位良好，最可能的直接原因是","options":["基托边缘过长压迫黏膜","支点线一侧缺少间接固位体","人工牙牙尖斜度过大","基托组织面有气泡"],"answer":[1],"explanation":"知识点为可摘局部义齿稳定性。卡环固位良好仍翘动，说明支点线对侧缺乏对抗翘动的间接固位体。A项边缘过长主要引起压痛和溃疡；C项牙尖斜度大影响侧向力但非翘动直接原因；D项气泡引起压痛或基托强度问题。","tier":"挑战"},{"id":208,"type":"single","stem":"制作个别托盘时，在模型上涂布分离剂后铺自凝树脂，其厚度一般应控制在","options":["0.5毫米左右","2毫米左右","4毫米左右","6毫米左右"],"answer":[1],"explanation":"知识点为个别托盘制作。自凝树脂铺于模型上，厚度约2毫米，既有足够强度又不至于过厚影响取模精度。A项过薄易变形折断；C、D项过厚占用口腔空间、影响印模材均匀分布。","tier":"进阶"},{"id":209,"type":"multi","stem":"关于全口义齿基托边缘伸展，下列做法正确的有","options":["上颌基托后缘应伸展至腭小凹后2毫米","下颌基托后缘应覆盖磨牙后垫全部","下颌基托舌侧边缘应越过内斜嵴","上颌颊侧边缘应伸展至颊沟底","下颌唇侧边缘应止于唇沟底"],"answer":[0,3],"explanation":"知识点为全口义齿基托边缘伸展范围。上颌后缘至腭小凹后2毫米可获良好封闭；上颌颊侧至颊沟底可形成边缘封闭。B项下颌后缘应覆盖磨牙后垫前1/2至2/3而非全部；C项下颌舌侧不应越过内斜嵴以免压迫舌体；E项下颌唇侧应止于唇沟底稍上方而非完全到沟底。","tier":"挑战"},{"id":210,"type":"single","stem":"制作钴铬合金铸造支架时，模型上需要预留的铸造收缩补偿量主要取决于","options":["合金的线收缩率","印模材料的弹性回复","石膏模型的吸水膨胀","包埋材料的膨胀性能"],"answer":[3],"explanation":"知识点：铸造收缩补偿。正确项：钴铬合金铸造时体积收缩的补偿主要依靠包埋材料的膨胀（吸水膨胀、热膨胀等）来实现，故取决于包埋材料的膨胀性能。错误项：合金线收缩率是补偿的针对对象而非补偿手段；印模弹性回复影响模型尺寸但不主导铸造补偿；石膏吸水膨胀影响工作模型精度，不是补偿铸造收缩的主要途径。","tier":"进阶"},{"id":211,"type":"single","stem":"可摘局部义齿基托蜡型完成后，装盒时最常采用的装盒方式是","options":["正装法","反装法","混装法","整装法"],"answer":[2],"explanation":"知识点：装盒方法。正确项：混装法将模型与蜡型分别包埋于上下层，兼顾基托与人工牙，是可摘局部义齿最常用的装盒方式。错误项：正装法多用于全口义齿；反装法适用于少数简单义齿；整装法多用于活动矫治器或个别托盘。","tier":"基础"},{"id":212,"type":"single","stem":"全口义齿排牙时，上颌前牙的切缘应位于","options":["切牙乳突后缘稍前方","唇高线下方约2mm","与下唇静止线平齐","稍向唇侧超出牙槽嵴顶"],"answer":[0],"explanation":"知识点：全口义齿前牙排列位置。正确项：上颌前牙唇面应位于切牙乳突后缘稍前方，符合美学与功能要求。错误项：唇高线下方是下颌前牙有关参考；与下唇静止线平齐不符前牙位置要求；超出牙槽嵴顶过多会破坏义齿稳定性。","tier":"基础"},{"id":213,"type":"single","stem":"义齿基托树脂聚合过程中，若升温过快最易导致","options":["基托颜色变浅","基托内产生气泡","基托韧性提高","基托与模型分离"],"answer":[1],"explanation":"知识点：热凝树脂聚合原理。正确项：升温过快时树脂内部单体汽化及聚合放热不能及时散出，易在基托内形成气泡。错误项：颜色变浅不是典型结果；韧性提高不符聚合规律；与模型分离多与分离剂或装盒有关，不是升温过快的主要后果。","tier":"基础"},{"id":214,"type":"single","stem":"铸造支架中，连接体与基牙接触区域应设计为","options":["完全密贴无间隙","留0.05mm缓冲间隙","留0.5mm明显间隙","与基牙呈点接触"],"answer":[0],"explanation":"知识点：支架就位与密合。正确项：连接体与基牙接触区域应完全密贴，以保证支持、稳定和固位。错误项：留缓冲间隙会影响支持；0.5mm间隙过大导致食物嵌塞；点接触不能提供足够支持。","tier":"进阶"},{"id":215,"type":"single","stem":"全口义齿试戴时发现下颌义齿后缘过长，最可能引起","options":["恶心反射","义齿翘动","发音不清","咀嚼无力"],"answer":[0],"explanation":"知识点：义齿边缘伸展与不适。正确项：下颌义齿后缘过长易越过磨牙后垫后方，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足。选项1正确：清洁且均匀氧化层是金瓷结合的基础。","tier":"进阶"},{"id":252,"type":"single","stem":"铸造蜡在制作嵌体蜡型时，为补偿铸造收缩，常用的方法是","options":["蜡型直接按预备体尺寸制作","蜡型放大后铸造再打磨","使用膨胀系数合适的包埋材料","铸造时提高熔金温度"],"answer":[2],"explanation":"知识点：铸造收缩补偿主要依靠包埋材料的凝固膨胀和热膨胀，使铸型腔大于蜡型。选项0错误：直接按预备体尺寸制作未考虑收缩，铸件会偏小。选项1错误：蜡型放大后打磨会破坏精确性，不是规范做法。选项3错误：提高熔金温度不能补偿铸造收缩，反而可能影响铸件质量。选项2正确：选择膨胀系数合适的包埋材料是补偿铸造收缩的主要方法。","tier":"进阶"},{"id":253,"type":"single","stem":"患者戴用全口义齿一周后复诊，主诉下颌义齿在张口时容易抬起，检查发现下颌基托后缘过长延伸至磨牙后垫后方，正确的处理是","options":["调磨下颌基托后缘过长部分","加高下颌基托后缘","调磨下颌前牙切缘","重衬下颌基托组织面"],"answer":[0],"explanation":"知识点：下颌基托后缘过长会刺激磨牙后垫区软组织，张口时肌肉活动将义齿抬起，需调磨过长部分。选项1错误：加高后缘会加重刺激和抬起。选项2错误：调磨前牙切缘与后缘抬起无关。选项3错误：重衬不能解决后缘过长问题。选项0正确：调磨过长后缘是针对性处理。","tier":"挑战"},{"id":254,"type":"multi","stem":"关于全口义齿基托边缘伸展，下列处理正确的有","options":["上颌基托后缘应伸展至腭小凹后约2mm","下颌基托后缘应覆盖磨牙后垫全部","唇颊侧基托边缘应止于黏膜转折处","舌侧基托边缘应越过下颌舌骨嵴","上颌结节区基托应适当缓冲"],"answer":[0,2,4],"explanation":"知识点：全口义齿基托边缘伸展需符合解剖标志要求。选项0正确：上颌后缘至腭小凹后约2mm是常规标准。选项2正确：唇颊侧止于黏膜转折处可形成良好边缘封闭。选项4正确：上颌结节区倒凹需缓冲避免压痛。选项1错误：下颌后缘应覆盖磨牙后垫约1/2至2/3，而非全部。选项3错误：舌侧边缘应止于下颌舌骨嵴之上，越过会压迫该区。","tier":"挑战"},{"id":255,"type":"single","stem":"藻酸盐印模材料调拌时，粉液比中用水量过多会导致印模出现哪种缺陷","options":["印模强度下降且易撕裂","印模凝固时间明显延长","印模表面出现气泡","印模与托盘黏结力增强"],"answer":[0],"explanation":"知识点：藻酸盐印模材料粉液比影响强度与凝固。水过多使材料稀薄、强度降低、易撕裂。正确项强度下降易撕裂符合。错误项凝固时间延长主要与水粉比略偏稀有关但强度下降更典型；表面气泡源于调拌手法而非水量；与托盘黏结力增强不成立，水多反而黏结下降。","tier":"进阶"},{"id":256,"type":"single","stem":"制作钴铬合金铸造支架时，模型上需要缓冲的部位通常是","options":["组织倒凹区","基牙牙冠轴面","支托凹底","模型边缘"],"answer":[0],"explanation":"知识点：钴铬合金支架就位需缓冲组织倒凹区，避免压伤黏膜。正确项组织倒凹区符合。错误项基牙牙冠轴面为就位道相关但非缓冲部位；支托凹底需贴合支托不需缓冲；模型边缘为工作区不需缓冲。","tier":"基础"},{"id":257,"type":"single","stem":"全口义齿排牙时，上颌后牙排列应遵循的he平面与牙槽嵴顶关系通常是","options":["he平面平行于牙槽嵴顶","he平面前低后高","he平面平分颌间距离","he平面与瞳孔连线平行"],"answer":[2],"explanation":"知识点：全口义齿he平面应平分颌间距离，使上下牙受力均衡。正确项平分颌间距离符合。错误项平行牙槽嵴顶不准确，牙槽嵴吸收程度不同；前低后高会破坏咬合；与瞳孔连线平行是前牙区参考，不适用于后牙he平面。","tier":"进阶"},{"id":258,"type":"single","stem":"可摘局部义齿设计中，当基牙牙冠较短且倒凹较小，为获得足够固位力常采用的卡环是","options":["锻丝卡环","铸造三臂卡环","圈形卡环","RPI卡环"],"answer":[1],"explanation":"知识点：铸造三臂卡环可精确贴合牙面，在倒凹小、牙冠短时通过铸造卡环臂进入倒凹获得固位。正确项铸造三臂卡环符合。错误项锻丝卡环弹性大但贴合差；圈形卡环用于远中孤立基牙；RPI卡环用于游离端缺牙，非短冠固位首选。","tier":"进阶"},{"id":259,"type":"single","stem":"患者戴用可摘局部义齿后主诉咀嚼时义齿翘动，检查发现基托边缘在系带处过长，正确的处理方法是","options":["磨除系带处过长基托","加高基托边缘","调整卡环固位力","重衬基托组织面"],"answer":[0],"explanation":"知识点：基托边缘在系带处过长会阻碍系带活动并导致翘动，应磨除过长部分。正确项磨除过长基托符合。错误项加高基托边缘会加重翘动；调整卡环固位力针对固位不足；重衬针对基托不密合，均非该问题处理。","tier":"挑战"},{"id":260,"type":"single","stem":"模型灌注时，为防止石膏模型产生气泡，正确的操作是","options":["从模型一端缓慢注入石膏","将石膏从高处快速倒入","调拌石膏时大量加水","灌注后立即用振动器振动"],"answer":[0],"explanation":"知识点：灌注石膏应从一端缓慢注入，使石膏逐渐流入并排出空气，减少气泡。正确项从一端缓慢注入符合。错误项从高处快速倒入会带入气泡；大量加水降低强度；立即振动可能使石膏分层但非首要防泡措施。","tier":"进阶"},{"id":261,"type":"single","stem":"全口义齿试排牙时，发现前牙覆盖过大，最可能的原因是","options":["上颌前牙排列过于唇倾","下颌前牙排列过于舌倾","上颌前牙排列过于舌倾","下颌前牙排列过于唇倾"],"answer":[0],"explanation":"知识点：前牙覆盖指上颌前牙切缘超出下颌前牙唇面的水平距离，上颌前牙唇倾会增加覆盖。正确项上颌前牙过于唇倾符合。错误项下颌前牙舌倾会减少覆盖；上颌前牙舌倾减少覆盖；下颌前牙唇倾减少覆盖。","tier":"挑战"},{"id":262,"type":"single","stem":"焊接钴铬合金支架时，为防止焊接区氧化影响焊接强度，应采取的措施是","options":["焊接前用焊剂保护焊接区","焊接时加大火焰氧化焰","焊接后立即投入冷水中","焊接前将支架预热至800℃"],"answer":[0],"explanation":"知识点：钴铬合金焊接时使用焊剂可防止氧化，保证焊接质量。正确项焊剂保护符合。错误项氧化焰会加剧氧化；焊接后立即冷水易产生应力裂纹；预热至800℃过高且非防氧化措施。","tier":"进阶"},{"id":263,"type":"single","stem":"患者戴用全口义齿后出现恶心，检查发现上颌基托后缘过长，正确的处理方法是","options":["磨短上颌基托后缘","加厚基托后缘","降低下颌he平面","重新制作义齿"],"answer":[0],"explanation":"知识点：上颌基托后缘过长会刺激软腭引起恶心，应磨短后缘。正确项磨短上颌基托后缘符合。错误项加厚后缘会加重刺激；降低he平面与恶心无关；重新制作义齿非首选，可先调改。","tier":"挑战"},{"id":264,"type":"single","stem":"全口义齿排牙时，上颌后牙牙尖与下颌牙槽嵴顶的关系应使咀嚼力主要传导至","options":["下颌牙槽嵴顶","下颌颊棚区","下颌舌骨嵴","下颌磨牙后垫"],"answer":[0],"explanation":"知识点：全口义齿后牙排列与咬合力传导。正确项为下颌牙槽嵴顶，因后牙功能尖应正对下颌牙槽嵴顶，使咬合力沿牙槽嵴长轴传导。错误项颊棚区是缓冲区而非主要承力区；舌骨嵴为需缓冲的骨突；磨牙后垫是边缘封闭区而非咬合力主承区。","tier":"进阶"},{"id":265,"type":"single","stem":"在可摘局部义齿设计时， 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分类法。正确项为单侧游离端缺失，即第二类。错误项双侧游离端缺失为第一类；单侧非游离端缺失为第三类；前牙缺失跨越中线为第四类。","tier":"基础"},{"id":266,"type":"single","stem":"石膏模型灌注后，为获得较高强度，通常建议的凝固时间是","options":["30分钟","1小时","12小时","24小时"],"answer":[2],"explanation":"知识点：石膏模型材料凝固与强度发展。正确项为12小时，因石膏凝固后强度随时间增长，12小时可达较高强度。错误项30分钟和1小时仅初凝或早期强度；24小时虽强度更高但常规操作中12小时已满足修模要求。","tier":"基础"},{"id":267,"type":"single","stem":"患者戴用全口义齿后主诉咬合时下颌总向一侧滑移，最可能的原因是","options":["双侧后牙排列偏颊","一侧后牙排列偏舌","前牙排列过于唇倾","基托边缘过长"],"answer":[1],"explanation":"知识点：全口义齿咬合平衡与异常咬合判断。正确项为一侧后牙排列偏舌，导致该侧咬合接触点偏移，咬合时下颌向对侧滑移。错误项双侧后牙偏颊多引起义齿脱位；前牙唇倾影响美观和唇侧丰满度；基托边缘过长引起压痛而非咬合滑移。","tier":"进阶"},{"id":268,"type":"single","stem":"在制作可摘局部义齿时，弯制卡环的钢丝通常选用的直径是","options":["0.6mm","0.8mm","1.0mm","1.2mm"],"answer":[1],"explanation":"知识点：可摘局部义齿弯制卡环用不锈钢丝规格。正确项为0.8mm，是常用弯制卡环钢丝直径。错误项0.6mm过细，卡环强度不足；1.0mm和1.2mm过粗，弹性差且不易弯制。","tier":"基础"},{"id":269,"type":"single","stem":"制作全口义齿时，确定颌位关系记录中垂直距离是指","options":["鼻底至颏底的距离","眼外眦至口角的距离","耳屏至鼻尖的距离","眉间至颏底的距离"],"answer":[0],"explanation":"知识点：全口义齿颌位关系记录中的垂直距离。正确项为鼻底至颏底的距离，即面下1/3高度。错误项眼外眦至口角、耳屏至鼻尖、眉间至颏底均不是垂直距离的标准测量标志。","tier":"基础"},{"id":270,"type":"single","stem":"制作树脂基托时，热处理后开盒取模，发现基托表面有散在小气泡，最可能的原因是","options":["装盒压力不足","充填树脂过多","热处理升温过快","分离剂涂布过多"],"answer":[2],"explanation":"知识点：树脂基托热处理气泡成因。正确项为热处理升温过快，树脂聚合产热使单体沸腾形成气泡。错误项装盒压力不足致基托不完整；充填树脂过多致溢出；分离剂过多影响表面光洁度而非气泡。","tier":"挑战"},{"id":271,"type":"single","stem":"口腔修复中，藻酸盐印模材料调拌时，粉液比过高会导致","options":["印模强度增加","印模流动性降低","印模凝固时间缩短","印模表面细节更清晰"],"answer":[1],"explanation":"知识点：藻酸盐印模材料粉液比与性能关系。正确项为粉液比过高使流动性降低，因粉多液少导致稠度增大。错误项强度增加不准确，粉过多反而脆性大；凝固时间缩短不明显；表面细节更清晰与粉液比过高相反。","tier":"进阶"},{"id":272,"type":"multi","stem":"以下关于全口义齿基托边缘伸展的描述，正确的有","options":["上颌颊侧边缘应伸展至颊沟","下颌舌侧边缘应伸展至口底","上颌后缘应伸展至腭小凹","下颌磨牙后垫应完全覆盖","上颌前缘应伸展至唇沟"],"answer":[0,1,2],"explanation":"知识点：全口义齿基托边缘伸展范围。正确项上颌颊侧至颊沟、下颌舌侧至口底、上颌后缘至腭小凹均为标准伸展。错误项下颌磨牙后垫应覆盖其前1/2至2/3而非完全覆盖；上颌前缘应伸展至唇沟但需适度，此处作为干扰项设置完全伸展不准确。","tier":"挑战"},{"id":273,"type":"single","stem":"可摘局部义齿支架弯制时，卡环臂进入基牙倒凹区的深度通常控制在","options":["0.25mm左右","0.50mm左右","0.75mm左右","1.00mm左右"],"answer":[0],"explanation":"知识点：卡环臂进入倒凹深度决定固位力。正确项对：钴铬合金卡环一般进入0.25mm左右，固位力适中且不易损伤基牙。错误项B错在0.50mm固位力过大易致基牙损伤；C错在0.75mm超出常规安全范围；D错在1.00mm会造成摘戴困难和基牙负担过重。","tier":"进阶"},{"id":274,"type":"single","stem":"患者戴用全口义齿后主诉咀嚼时义齿翘动，检查发现基托边缘在系带处过短，最可能的原因是","options":["基托边缘缓冲不足压迫系带","印模时系带区未做功能整塑","颌位关系记录偏移导致咬合不平衡","人工牙排列偏向颊侧形成杠杆"],"answer":[1],"explanation":"知识点：全口义齿边缘伸展与功能整塑。正确项对：系带区印模未做功能整塑会使边缘过短，戴入后系带活动牵拉义齿翘动。错误项A错在缓冲不足表现为压痛而非翘动；C错在颌位偏移引起的是咬合痛或偏斜不是系带区翘动；D错在牙排列偏颊主要引起脱位和压痛。","tier":"挑战"},{"id":275,"type":"single","stem":"石膏模型灌注后，脱模的最佳时机是","options":["石膏初凝后立即脱模","石膏终凝后30分钟脱模","石膏完全干燥后脱模","石膏发热结束后即可脱模"],"answer":[3],"explanation":"知识点：石膏凝固过程与脱模时机。正确项对：石膏发热结束表示凝固反应基本完成，此时强度足够且尚含水分，脱模不易断裂。错误项A错在初凝时强度不足易损坏模型；B错在终凝后30分钟仍偏早，边缘易崩；C错在完全干燥后石膏过硬脆，脱模易碎裂。","tier":"基础"},{"id":276,"type":"single","stem":"焊接钴铬合金支架时，为防止焊接区氧化影响结合强度，正确的操作是","options":["焊接前用酒精清洁焊接面并预热","焊接时使用还原焰并缩短加热时间","焊接前在焊接面涂布硼砂并充分预热","焊接后立即投入冷水中快速冷却"],"answer":[2],"explanation":"知识点：合金焊接的防氧化与助熔措施。正确项对：涂布硼砂可隔绝氧气并清除氧化物，充分预热保证焊料流动结合。错误项A错在仅酒精清洁不能防止高温氧化；B错在缩短加热时间会导致焊料未完全熔融结合不良；D错在急冷会产生内应力甚至裂纹。","tier":"进阶"},{"id":277,"type":"single","stem":"在全口义齿排牙时，上前牙的唇面应位于","options":["切导针前方约2mm处","切导针后方约1mm处","与切导针平齐的位置","唇侧超出切导针约3mm"],"answer":[0],"explanation":"知识点：全口义齿前牙排列位置。正确项对：上中切牙唇面位于切导针前方约2mm，符合美观与功能要求。错误项B错在后方会使上唇塌陷；C错在平齐位置唇部支撑不足；D错在超出过多导致唇部过突。","tier":"基础"},{"id":278,"type":"single","stem":"患者下颌双侧后牙游离缺失，设计可摘局部义齿时，为防止义齿下沉，应采取的措施是","options":["增加卡环数目增强固位","在缺牙区牙槽嵴上设计支托","扩大基托面积并取功能性印模","选用弹性较大的不锈钢卡环"],"answer":[2],"explanation":"知识点：游离端缺失义齿的下沉控制。正确项对：扩大基托面积并取功能性印模可分散咬合力，减少游离端下沉。错误项A错在增加卡环只增强固位不解决下沉；B错在游离缺失区无牙可放支托；D错在弹性卡环与下沉控制无关。","tier":"进阶"},{"id":279,"type":"single","stem":"铸造蜡型在铸造前需要进行蜡型排气，其主要目的是","options":["减少铸造时气体膨胀造成的铸件缺陷","防止蜡型在包埋时发生变形","提高蜡型表面的光洁度","便于包埋材料与蜡型紧密结合"],"answer":[0],"explanation":"知识点：蜡型排气与铸造缺陷的关系。正确项对：排气可减少铸造时蜡型气化产生的气体压力，避免气孔和铸不满。错误项B错在排气不改变蜡型热变形；C错在表面光洁度由蜡型修整决定；D错在包埋结合靠包埋材料润湿性。","tier":"进阶"},{"id":280,"type":"single","stem":"某技师在制作烤瓷熔附金属冠时，金属基底冠的瓷覆盖区金瓷结合面应","options":["打磨成镜面以减少瓷层厚度","喷砂后形成均匀粗糙面","涂布分离剂防止瓷粘附","酸洗后保持光滑钝化面"],"answer":[1],"explanation":"知识点：金瓷结合的表面处理。正确项对：喷砂形成均匀粗糙面增大结合面积，提高金瓷结合强度。错误项A错在镜面减少机械锁结；C错在分离剂会完全阻止金瓷结合；D错在光滑钝化面结合力不足。","tier":"挑战"},{"id":281,"type":"single","stem":"在制作可摘局部义齿时，模型观测线用于确定","options":["基牙倒凹区与卡环臂的走向","人工牙的排列位置","基托的边缘伸展范围","咬合平面的倾斜角度"],"answer":[0],"explanation":"知识点：模型观测线的临床应用。正确项对：观测线划分倒凹区与非倒凹区，指导卡环臂走向和位置设计。错误项B错在人工牙排列由咬合关系和美学决定；C错在基托边缘由功能整塑决定；D错在咬合平面由颌位记录决定。","tier":"进阶"},{"id":282,"type":"multi","stem":"全口义齿初戴后出现恶心，可能的原因包括","options":["基托后缘过长刺激软腭","基托后缘与黏膜不密合","下颌前牙排列过于偏舌","垂直距离恢复过低"],"answer":[0,1],"explanation":"知识点：全口义齿戴入后恶心的原因分析。正确项对：后缘过长直接刺激软腭致恶心，后缘不密合唾液刺激也会引起恶心。错误项C错在下前牙偏舌主要影响发音和舌活动，不直接致恶心；D错在垂直距离过低表现为咀嚼无力、面容苍老，与恶心无关。","tier":"进阶"},{"id":283,"type":"single","stem":"制作可摘局部义齿时，模型观测后确定就位道，若选择平均倒凹法，其主要目的是","options":["使各基牙倒凹均匀分布便于卡环设计","使义齿就位时对基牙扭力最小","使模型前后方向倒凹集中于一侧","使基牙远中面倒凹完全消除"],"answer":[1],"explanation":"平均倒凹法通过调整模型倾斜使各基牙倒凹量接近，目的是减小义齿就位时对基牙的扭力，保护基牙。A项倒凹均匀分布是平均倒凹的表面现象，不是核心目的；C项倒凹集中于一侧是调凹法可能造成的结果，方向错误；D项完全消除倒凹不符合可摘局部义齿需利用倒凹固位的原理。","tier":"挑战"},{"id":284,"type":"single","stem":"上颌全口义齿基托后缘伸展的解剖标志是","options":["腭小凹后约2mm处","腭中缝与软腭交界处","翼上颌切迹连线前方","腭大孔后方约5mm处"],"answer":[0],"explanation":"上颌全口义齿后缘应伸展至腭小凹后约2mm的软腭区，形成后堤封闭。B项腭中缝与软腭交界处是骨性标志，不是基托后缘的伸展标志；C项翼上颌切迹是后缘两侧的界限，不是后缘中点的伸展标志；D项腭大孔是神经血管出口，与基托后缘无关。","tier":"基础"},{"id":285,"type":"single","stem":"铸造全冠蜡型制作时，为保证铸件收缩后仍能顺利就位，蜡型应","options":["在代型上直接恢复解剖形态并预留粘固剂间隙","先做内层蜡型补偿收缩再做外层形态","整体加厚蜡型以补偿铸造收缩","只恢复咬合面形态不作轴面修整"],"answer":[0],"explanation":"铸造全冠蜡型需在代型上恢复解剖形态，同时通过代型间隙漆等预留粘固剂间隙，保证铸件收缩后能就位。B项先做内层再外层的分步法不是常规全冠蜡型程序；C项整体加厚蜡型会使冠过紧无法就位；D项只恢复咬合面会导致轴面形态和边缘不合格。","tier":"进阶"},{"id":286,"type":"single","stem":"患者戴用可摘局部义齿后主诉咀嚼时义齿翘动，检查发现游离端基托下黏膜有压痛点，最可能的原因是","options":["基托边缘过度伸展","支托位置过低","卡环臂进入倒凹过深","基托与黏膜间存在间隙"],"answer":[0],"explanation":"游离端义齿咀嚼时基托下沉，若边缘过度伸展会压迫黏膜产生压痛点并引起翘动。B项支托位置过低主要影响支持，不直接造成游离端翘动；C项卡环臂进入倒凹过深主要影响就位和摘戴；D项基托与黏膜间有间隙一般不会产生压痛点。","tier":"挑战"},{"id":287,"type":"single","stem":"全口义齿排牙时，上颌后牙的补偿曲线曲度大小主要取决于","options":["髁导斜度","切导斜度","牙尖斜度","平面斜度"],"answer":[0],"explanation":"根据五因素十定律，补偿曲线曲度与髁导斜度正相关，髁导斜度越大补偿曲线曲度越大。B项切导斜度主要影响前牙区排列；C项牙尖斜度影响侧方平衡；D项平面斜度影响前伸平衡，但不是补偿曲线曲度的主要决定因素。","tier":"基础"},{"id":288,"type":"single","stem":"制作钴铬合金支架时，模型上需先填倒凹，下列部位中必须填倒凹的是","options":["基牙颊面倒凹区","基牙舌面倒凹区","组织倒凹区","基牙邻面倒凹区"],"answer":[2],"explanation":"支架的硬区部分不能进入组织倒凹，否则无法就位，因此组织倒凹区必须填倒凹。A、B、D项基牙倒凹区是卡环臂需要进入的区域，不能填倒凹，否则卡环失去固位作用。","tier":"进阶"},{"id":289,"type":"single","stem":"全口义齿初戴时，患者做前伸咬合运动，若前牙接触而后牙不接触，应调整的是","options":["减小切导斜度","增大髁导斜度","减小补偿曲线曲度","增大牙尖斜度"],"answer":[0],"explanation":"前伸咬合时前牙接触后牙不接触，说明切导斜度过大，应减小切导斜度使后牙接触。B项增大髁导斜度会使后牙更不接触；C项减小补偿曲线曲度也会使后牙脱离接触；D项增大牙尖斜度不能解决前伸平衡问题。","tier":"进阶"},{"id":290,"type":"single","stem":"患者女，55岁，上颌单侧游离端缺失，设计可摘局部义齿时，为减小游离端基托下沉对基牙的扭力，最宜采取的措施是","options":["增加近中支托并设计RPI卡环组","增加远中支托并设计三臂卡环","仅设计颊侧卡环臂固位","设计全牙列连续卡环"],"answer":[0],"explanation":"游离端缺失时，近中支托配合RPI卡环组可使义齿受力时基托下沉、卡环臂离开基牙，减小对基牙的扭力。B项远中支托加三臂卡环会产生较大扭力；C项仅颊侧卡环臂固位不足且不能分散扭力；D项连续卡环不适用于单侧游离端且扭力更大。","tier":"挑战"},{"id":291,"type":"single","stem":"在全口义齿制作中，若患者下颌牙槽嵴严重吸收呈低平状，排牙时最应注意的是","options":["后牙尽可能排在牙槽嵴顶","前牙尽量向唇侧排列","后牙尽量向舌侧排列","前牙加大覆盖以利美观"],"answer":[0],"explanation":"下颌牙槽嵴严重吸收时，人工牙应尽量排在牙槽嵴顶，以利于义齿稳定和咬合力沿牙槽嵴传导。B项前牙向唇侧排列会产生杠杆力导致义齿翘动；C项后牙向舌侧排列影响舌空间和稳定；D项加大覆盖会影响前伸平衡和美观，不是低平牙槽嵴的首要注意点。","tier":"挑战"},{"id":292,"type":"single","stem":"某技师在制作金属烤瓷冠时，发现瓷层与金属结合处出现气泡，下列操作中最可能导致该缺陷的是","options":["金属基底表面喷砂后未彻底清洁","瓷粉堆塑时振动不够","烧结温度略低于规定值","瓷层厚度略大于规定值"],"answer":[0],"explanation":"金属基底表面喷砂后若残留砂粒或油污，烧结时会产生气泡，影响金瓷结合。B项振动不够主要导致瓷层致密度不足而非气泡；C项烧结温度略低主要影响瓷的熔融和色泽；D项瓷层厚度略大主要影响强度和美观，不是气泡的直接原因。","tier":"挑战"},{"id":293,"type":"single","stem":"全口义齿排牙时，上颌后牙排列应使牙合平面","options":["与瞳孔连线平行","与鼻翼耳屏线平行","与眶耳平面平行","与下颌牙槽嵴平行"],"answer":[1],"explanation":"知识点为全口义齿牙合平面定位。鼻翼耳屏线是临床常用参考线，牙合平面约与之平行，故正确。瞳孔连线主要用于前牙排列的对称参考，不是牙合平面标准；眶耳平面是解剖学参考平面，与功能性牙合平面不一致；下颌牙槽嵴吸收程度个体差异大，不能作为统一基准。","tier":"进阶"},{"id":294,"type":"single","stem":"某技师在石膏模型上完成蜡型后，拟采用中熔合金铸造，其蜡型厚度应控制在","options":["0.2～0.3mm","0.3～0.5mm","0.5～0.8mm","1.0～1.5mm"],"answer":[1],"explanation":"知识点为不同铸造合金对蜡型厚度的要求。中熔合金铸造收缩补偿适中，蜡型厚度一般控制在0.3～0.5mm，故B正确。0.2～0.3mm偏薄，易造成铸造不全；0.5～0.8mm偏厚，增加收缩变形；1.0～1.5mm明显过厚，适用于特殊高熔合金大件，不用于常规中熔铸造。","tier":"基础"},{"id":295,"type":"single","stem":"用琼脂印模材制取工作模时，为防止印模变形，灌注石膏前应将印模","options":["立即灌注，避免吸水膨胀","放入冰箱冷冻10分钟","在室温下静置至完全冷却","用热水冲洗后灌注"],"answer":[2],"explanation":"知识点为琼脂印模材的冷却定型特性。琼脂由溶胶转为凝胶需充分冷却，室温静置至完全冷却可减少变形，故C正确。立即灌注时印模尚未定型，易变形；冷冻会使凝胶收缩过快导致尺寸失真；热水冲洗会重新软化琼脂，破坏印模。","tier":"挑战"},{"id":296,"type":"single","stem":"患者戴用全口义齿后主诉说话时义齿有哨音，最可能的原因是","options":["基托边缘过长","腭部基托过于光滑","上下前牙排列过分重叠","后牙牙合平面过低"],"answer":[2],"explanation":"知识点为全口义齿发音异常的常见原因。哨音多因前牙舌面与腭部之间形成狭窄通道，上下前牙排列过分重叠会加重此效应，故C正确。基托边缘过长主要引起压痛或固位差；腭部基托光滑不会产生哨音；牙合平面过低主要影响咀嚼和美观，与哨音关系不大。","tier":"进阶"},{"id":297,"type":"single","stem":"制作金属烤瓷冠时，金瓷结合界面出现气泡，最可能的操作原因是","options":["金属基底表面喷砂后未清洁","瓷粉堆塑时振动不足","烧结温度低于规定值","瓷层过厚一次烧结完成"],"answer":[0],"explanation":"知识点为金属烤瓷冠气泡产生的工艺原因。金属基底喷砂后若未彻底清洁，残留砂粒或油污会在烧结时产生气泡，故A正确。振动不足主要导致瓷层致密度差和气泡也有关系但非最直接原因；烧结温度偏低主要造成瓷熔合不全；瓷层过厚一次烧结主要引起瓷裂。","tier":"进阶"},{"id":298,"type":"single","stem":"某技师在制作可摘局部义齿时，模型观测后发现基牙近缺隙侧倒凹较大，远缺隙侧倒凹较小，此时卡环设计宜采用","options":["回力卡环","对半卡环","倒钩卡环","圈形卡环"],"answer":[2],"explanation":"知识点为不同倒凹条件下卡环类型的选择。倒钩卡环适用于近缺隙侧倒凹大、远缺隙侧倒凹小的基牙，故C正确。回力卡环多用于远中游离端；对半卡环用于前后均有缺隙的孤立基牙；圈形卡环用于远中孤立磨牙，均不符合本病例倒凹分布特点。","tier":"挑战"},{"id":299,"type":"single","stem":"制作钴铬合金支架的可摘局部义齿时，模型经复模法翻制耐火材料工作模型后，其干燥处理的正确操作是","options":["室温自然干燥后直接放入已升至900℃的茂福炉中","室温自然干燥后缓慢升温至900℃并维持足够时间","趁湿直接放入茂福炉随炉升温至900℃","室温自然干燥后放入400℃炉中维持至完全干燥"],"answer":[1],"explanation":"知识点：钴铬合金铸造支架耐火模型焙烧前的干燥与升温工艺。正确项B：耐火模型必须先在室温自然干燥，再随炉缓慢升温并维持足够时间，使模型内水分和有机物充分排除，避免铸造时产生气孔和模型开裂。A错在未经缓慢升温直接入高温炉，骤热会使模型爆裂。C错在带湿入炉，水分急速汽化导致模型崩裂。D错在只干燥不完成焙烧升温，达不到铸造所需的焙烧温度。","tier":"挑战"},{"id":300,"type":"multi","stem":"铸造全冠蜡型完成后进行包埋时，下列操作中符合正确要求的是","options":["蜡型表面用软毛刷均匀涂布一薄层表面张力降低剂","包埋材料沿蜡型一侧缓慢注入避免产生气泡","包埋后待包埋材料完全凝固再取下铸圈底座","蜡型内壁用酒精反复擦洗以去除表面油污","包埋材料调和后静置片刻再使用以排除气泡"],"answer":[0,1,4],"explanation":"知识点：铸造全冠蜡型的包埋操作要点。A正确：涂布表面张力降低剂可使包埋材料均匀润湿蜡型表面，防止气泡附着。B正确：从一侧缓慢注入可减少气泡卷入。E正确：调和后静置排气可减少包埋料内气泡。C错误：应在包埋材料初步凝固后及时取下底座，完全凝固后再取易造成铸道口损伤或蜡型移位。D错误：用酒精反复擦洗蜡型会溶解蜡型表面，破坏蜡型形态和边缘。","tier":"挑战"}]}