6.牙齒在發育之形態分化(morphodifferentiation)期間發生障礙,易造成:
(A)多生牙(supernumerary teeth)
(B)先天性缺牙(congenitally missing teeth)
(C) 畸形牙(malformed teeth)
(D)位萌出(ectopic eruption)
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統計: A(5), B(14), C(584), D(4), E(0) #1634272
統計: A(5), B(14), C(584), D(4), E(0) #1634272