老年无牙颌患者,义齿戴用7年,自觉咀嚼不利,面显苍老。其原因是
A. 下(颌)前伸
B. 垂直距离过低
C. 垂直距离过高
D. 咬合不平衡
E. 义齿固位差
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男,65岁,上下颌牙列缺失,行全口义齿修复。口腔检查时发现患者有习惯性下颌前伸,那么确定颌位关系时应注意
A. 利用旧义齿的颌位关系
B. 帮助下颁后退
C. 采用患者的习惯位置
D. 适当增大垂直距离
E. 牙槽嵴的丰满度
女,28岁,上前牙2年前不慎折断,未及时处理,现上唇肿胀,检查发现冠折3/4,叩痛(+++),根管口暴露,探诊无反应,牙体变色,前庭沟变浅,并有波动,为缓解疼痛、消除急性炎症,对该病例应及时进行以下应急处理,但不包括( )。
A. 根管开放引流
B. 切开排脓
C. 拔牙引流
D. 消炎止痛
E. 根管冲洗上药
The communications explosion is on the scale of the rail, automobile or telephone revolution. Very soon you’ll be able to record your entire life (1) —anything a microphone or a camera can sense you’ Il be able to (2) . In particular, the number of images a person captures in a lifetime is set to rise exponentially. The thousand (3) a year I take of my children on a digital camera are all precious to me. (4) a generation’ s time, my children’ s children will have total image documentation of their entire lives—a (5) log of tremendous personal value.By then we’ll be wrestling with another question: how we control all the electronic (6) connected to the internet: trillions of PCs, laptops, cell phones and other gadgets. In Cambridge, we’re already working (7) millimetre-square computing and sensing devices that can be linked to the internet through the radio network. This sort of (8) will expand dramatically (9) microscopic communications devices become dirt-cheap and multiply. Just imagine (10) the paint on the wall could do if it had this sort of communications dust in it: change colour, play music, show movies or even speak to you.(11) costs raise other possibilities too. (12) launching space vehicles is about to become very much cheaper, the number of satellites is likely to go up exponentially. There’ s lots of (13) up there so we could have millions of them. And if you have millions of loworbit satellites, you can establish a (14) communications network that completely does away with towers and masts. If the satellites worked on the cellular principle so you got spatial reuse of frequencies, system (15) would be amazing. Speech is so (16) that I expect voice communication to become almost free eventually: you’ 11 pay just a monthly fixed (17) and be able to make as many calls as you want. By then people will also have fixed links with business (18) , friends and relatives. One day I (19) being able to keep in touch with my family in Poland on a fibreoptic audio-video (20) ; we’ll be able to have a little ceremony at supper-time, open the curtains and sit down "together" to eat. Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1.20()
A. route
B. tunnel
C. link
D. path
女,23岁,上前牙两年前不慎折断,未及时处理,现上唇肿胀,检查发现右上中切牙冠折 3/4,叩痛(+++),根管口暴露,探诊(-),牙体变色,前庭沟变浅,并有波动,为缓解疼痛、消除急性炎症,对该病例应及时进行以下应急处理,除了( )
A. 根管开放引流
B. 消炎止痛
C. 拔牙引流
D. 切开排脓
E. 根管冲洗上药