23.在正常齒列咀嚼食物時,下列牙齒形態特徵,何者可提供有益牙齦的適當刺激?
(A)頰舌側外形(facial and lingual contour)
(B)牙骨質牙釉質交界(cementoenamel junction)
(C)點角(point angle)
(D)窩(fossa)

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統計: A(10), B(1), C(2), D(2), E(0) #3975642