4.有關第二乳臼齒的咬合關係,下列何者較易發展成Angle Class III molar關係?
(A)distal step
(B)flush terminal plane
(C)mesial step
(D)external oblique ridge line
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統計: A(21), B(2), C(362), D(0), E(0) #1031939
統計: A(21), B(2), C(362), D(0), E(0) #1031939