【名词&注释】
抗氧化(antioxidation)、抗腐蚀性(corrosion resistance)、全口义齿(complete denture)、延展性(ductility)、可摘局部义齿(removable partial denture)、抗腐蚀能力(anti corrosion property)、人工牙(artificial tooth)、明显提高(improved obviously)
[单选题]可摘局部义齿前牙排列时,下列哪项不是对称美的要求
A. 人工牙(artificial tooth)的唇面形态
B. 人工牙(artificial tooth)的轴向倾斜
C. 人工牙(artificial tooth)的唇舌径厚度
D. 人工牙(artificial tooth)的切缘长短
E. 人工牙(artificial tooth)的颈缘高低