问题 单项选择题

戴义齿两周,主诉义齿撬动明显,且疼痛。查游离端可摘局部义齿,分别设计三臂卡环,马蹄形塑基托,与黏膜贴合良好,远中牙槽嵴黏膜上可见黏膜红肿。造成义齿撬动疼痛的原因是()。

A.人工牙排在牙槽嵴顶腭侧

B.人工牙牙尖斜度过大

C.未设计间接固位体

D.卡环缺乏环抱作用

E.基托面积小

答案

参考答案:C

解析:

可摘局部义齿双侧游离缺失,应在支点的对侧放置直接固位体或间接固位体,以减小侧向[*]力,达到咬合平衡,可以克服义齿的摆动。故答案为C。

多项选择题
单项选择题

Passage One


When I was six, Dad brought home a dog one day, who was called "Brownie". My brothers and I all loved Brownie and did different things with her. One of us would walk her, another would feed her, then there were baths, playing catch and many other games. Brownie, in return, loved each and every one of us. One thing that most touched my heart was that she would go to whoever was sick and just be with them. We always felt better when she was around.
One day, as I was getting her food, she chewed up one of Dad’s shoes, which had to be thrown away in the end. I knew Dad would be mad and I had to let her know what she did was wrong. When I looked at her and said, "Bad girl," she looked down at the ground and then went and hid. I saw a tear in her eyes.
Brownie turned out to be more than just our family pet, she went everywhere with us. People would stop and ask if they could pet her. Of course she’d let anyone pet her. She was just the most lovable dog. There were many times when we’d be out walking and a small child would come over and pull on her hair. She never barked or tried to get away. Funny thing is she would smile. This frightened people because they thought she was showing her teeth. Far from the truth, she loved everyone.
Now many years have passed since Brownie died of old age. I still miss days when she was with us.

What would Brownie do when someone was ill in the family

A.Look at them sadly.

B.Keep them company.

C.Play games with them.

D.Touch them gently.