共用题干女,45岁。缺失,前牙区Ⅲ度深覆牙合,余留牙无异常。可摘局部义齿卡环应放置在A:B:C:D:E:
共用题干
女,45岁。
缺失,前牙区Ⅲ度深覆牙合,余留牙无异常。
女,45岁。
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/3e691a33d13fb978.jpg)
可摘局部义齿卡环应放置在
A:![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/d9a281a2283a55ad.jpg)
B:![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/02dcc41f96c4c5a2.jpg)
C:![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/d6c51d697d6698be.jpg)
D:![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/14eb4ee10b37970b.jpg)
E:![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/65a54debe58bb865.jpg)
A:
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/d9a281a2283a55ad.jpg)
B:
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/02dcc41f96c4c5a2.jpg)
C:
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/d6c51d697d6698be.jpg)
D:
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/14eb4ee10b37970b.jpg)
E:
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/65a54debe58bb865.jpg)
参考解析
解析:题41:该患者缺牙间隙在牙弓的前端,常设计为天然牙和黏膜共同支持的义齿。为了避免影响美观,尽量避免暴露金属,同时要避免邻近缺隙的基牙受到较大的扭力,卡环应放置在两侧
或以后的牙齿上(如
间隙卡环,卡臂尖位于近中倒凹区;或
联合卡环),尽量不要在
上放置卡环。同时要在
的牙合面或舌面近中放置支托,以增强支持作用。正确答案应选E。题42:前牙Ⅲ度深覆牙合,上前牙腭侧修复间隙小,而前牙牙合力相对较大。人工牙腭侧基托必须有足够的强度,而且要尽量薄。所以义齿应采用铸造金属支架和金属铸造基托。塑料基托、塑料基托加金属网或锤造金属基托均不适合。正确答案是A。题43:由于人工牙处咬合力大,修复间隙小,为了避免人工牙折断,应采用有金属舌面的人工前牙。正确答案是D。
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/149af8a8c4fbd554.jpg)
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/c8131b7abb82a496.jpg)
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/2c237ac2ffddcf35.jpg)
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/79d59b9f9e43d8f3.jpg)
![](https://assets.51tk.com/images/a4036d27d4a2b8f8_img/3583d82bbd8958ae.jpg)