57.依統計,下列何種牙周骨缺損(osseous defect)為臨床上最常見?
(A)Hemiseptum
(B)Three-wall osseous defect
(C)Interdental crater
(D)Circumferential defect
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統計: A(40), B(196), C(372), D(48), E(0) #1152451
統計: A(40), B(196), C(372), D(48), E(0) #1152451