问题 单项选择题

男,23岁。下颌6缺失,下7近中、舌向倾斜均超过30°,牙冠完整,牙周健康。下5、8无异常。欲行固定义齿修复,对下7正确的处理方法是()

A.正畸治疗

B.行RCT后设计桩核冠固位体

C.设计半固定桥

D.设计单端固定桥

E.拔除下7,以5、8为基牙设计固定桥

答案

参考答案:A

解析:对于倾斜度超过30°的基牙,应行正畸治疗改善牙齿排列后再选作固定义齿基牙。桩核冠或半固定桥设计虽然可以获得共同就位道,但无法解决基牙所受侧向力过大的问题,仍易导致基牙损伤。

单项选择题 A1型题
单项选择题

Many foreigners who have not visited Britain call all the inhabitants English, for they are used to thinking of the British Isles as England. (1) , the British Isles contain a variety of peoples, and only the people of England call themselves English. The others (2) to themselves as Welsh, Scottish, or Irish, (3) the case may be; they are often slightly annoyed (4) being classified as "English".

Even in England there are many (5) in regional character and speech. The chief (6) is between southern England and northern England. South of a (7) going from Bristol to London, people speak the type of English usually learnt by foreign students, (8) there are local variations.

Further north regional speech is usually " (9) " than that of southern Britain. Northerners are (10) to claim that they work harder than Southerners, and are more (11) They are open-hearted and hospitable; foreigners often find that they make friends with them (12) Northerners generally have hearty (13) : the visitor to Lancashire or Yorkshire, for instance, may look forward to receiving generous (14) at meal times.

In accent and character the people of the Midlands (15) a gradual change from the southern to the northern type of Englishman.

In Scotland the sound (16) by the letter "R" is generally a p sound, and "R" is often pronounced in words in which it would be (17) in southern English. The Scots are said to be a serious, cautious, thrifty people, (18) inventive and somewhat mystical. All the Celtic peoples of Britain (the Welsh, the Irish, the Scots) are frequently (19) as being more "fiery" than the English. They are (20) a race that is quite distinct from the English. (289 words)

Notes: fiery 暴躁的,易怒的。

(15)()

A.designate

B.demonstrate

C.represent

D.reckon