问题
单项选择题 案例分析题
29岁男性患者，左上前牙不慎撞断1天，冷热刺激痛，要求修复。
口腔检查示左上2外伤冠折露髓，远中及舌侧缺损至龈下1．5～2mm，松（-），叩（+），龈缘红肿。左上3近中邻面浅龋，余牙牙周情况良好。下列哪项修复前准备是不必要的（）.
A.脱敏治疗
B.根管治疗
C.邻牙去腐充填
D.冠延长术
E.选磨调
答案
参考答案：A
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29岁男性患者，左上前牙不慎撞断1天，冷热刺激痛，要求修复。
口腔检查示左上2外伤冠折露髓，远中及舌侧缺损至龈下1．5～2mm，松（-），叩（+），龈缘红肿。左上3近中邻面浅龋，余牙牙周情况良好。下列哪项修复前准备是不必要的（）.
A.脱敏治疗
B.根管治疗
C.邻牙去腐充填
D.冠延长术
E.选磨调
参考答案：A
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| There are four seasons in a year. They are spring, summer, fall and winter. 1________ is the first season of the year. It is getting 2________ and flowers begin to open. Trees and grass begin to turn 3________. It's usually rainy, people like to fly kites. Then it is summer and it is the 4________ season of the year. The days get 5________, so we can play in the afternoon. 6________ is the third season. It's very beautiful. It's not too hot and not too cold. There is usually 7________ in fall and leaves begin to turn yellow and come down. Many people like to have a picnic in the park. The last season of the year is winter. People usually don't like to go 8________ because it is cold. And there is sometimes 9________ in winter. Then we play with it. But it is the 10________ of the year. So we have to wear heavy clothes such as winter jacket in winter.
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