25.關於舌側隆凸鈎靠(cingulum rest)與切緣鈎靠(incisal rest)的敘述,下列何者正確?
(A)犬齒缺失時,能以多顆門牙的舌側隆凸鈎靠取代切緣鈎靠支持的功能
(B)切緣鈎靠比舌側隆凸鈎靠力量傳導更接近牙齒長軸,故優先考量使用
(C)舌側隆凸鈎靠縱切觀時的外型呈現V型,位於咬合1/3與中間1/3的交界位置
(D)舌側隆凸鈎靠的近遠心長度約2.5~3.0 mm,切緣根尖深度需要0.5 mm
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統計: A(790), B(43), C(254), D(241), E(0) #3198043
統計: A(790), B(43), C(254), D(241), E(0) #3198043
詳解 (共 3 筆)
#7437611
Rest preparation for RPD design:
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Occlusal rest:Rounded triangular shape.
- Width (at marginal ridge):2.5 mm.
- Depth (at marginal ridge):1.5 mm.
- Deepest part of the rest seat:concave (呈現 < 90度).
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Cingulum rest:Inverted V shape.
- MD length:2.5 ~ 3 mm.
- BL width:2 mm.
- Depth:1.5 mm.
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Incisal rest:Rounded notch.
- Width:2.5 mm.
- Depth:1.5 mm.
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