16.有關Angle's line of occlusion與esthetic line of the dentition之敘述,下列何者錯誤?
(A)Angle's line of occlusion可用來分析牙弓對稱與否及擁擠程度
(B)上下咬合時無法觀察Angle's line of occlusion
(C)esthetic line of the dentition可用來評估牙齒與嘴唇關係
(D)esthetic line of the dentition是沿著下顎前牙至後牙牙齒唇側面連線