对于远中游离端义齿的制作下列哪项是错误的 （）
A.人工牙减径
B.人工牙减数
C.减少与对颌牙牙合面的接触面积
D.减少基托面积
E.加大基托面积
参考答案：D
解析：
义齿的下沉常见于游离端基托，无牙合支托的黏膜支持式义齿，是由牙合力造成的。牙合力的垂直分力是最主要的作用力，若发生不均匀性下沉极易造成基牙和支持组织的损伤。对于游离缺失患者，可采取人工牙减径，必要时减数，制取压力印模，扩大基托伸展面积等以分散牙合力。
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| As a child, there was nothing I liked better than Sunday afternoon at my grandfather's farm. 1 by miles of winding stone walls, the house provided 2 hours of fun for a city boy. I can still remember one 3 when I was eight years old. I wanted 4 anything to be allowed to climb the walls surrounding the property. The walls were old; some stones were 5 , others loose. Still, my desire to climb across those walls 6 so strong that finally, one spring weekend, I took all my 7 and entered the living room, where the 8 had gathered after Sunday dinner. "I, I wanna climb the stone walls," I said hesitantly. 9 a chorus went up from the women in the room. "Heavens, no!" they cried. "You will hurt yourself". I wasn't too 10 ; the respond was just as I had expected. But 11 I could have left the room, I was 12 by my grandfather's loud voice:" Now 13 just a minute." I heard him say. "Let the little boy climb the stone walls. 14 , he has to learn to do things for himself." For the next two hours I climbed those old walls and had the time of my 15 . Later I told my grandfather about my 16 . I will never forget what he said:"Fred," he said, smiling, "you made this day a (an) 17 one just by being yourself. Always remember, there is only one person in this whole world like you, and I like you exactly as you are." Many years have passed since then, and today I 18 the television program. Mister Rogers's Neighborhood, seen by millions of children. There have been 19 over the years, but one thing 20 the same: my suggestion to children at the end of almost every visit. "There is only one person in this whole world like you," the kids can hear me say, "and people can like you exactly as you are." | ||||
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