21.上顎門齒牙冠受力移動時,下列何者最易出現?
(A)傾斜(tipping)
(B)整體移動(bodily movement)
(C)牙根扶正(root uprighting)
(D)下壓內縮(intrusion)

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統計: A(597), B(9), C(9), D(124), E(0) #1742190

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