【名词&注释】
可能性(possibility)、营养不良(malnutrition)、楔状缺损(wedge-shaped defect)、慢性牙髓炎(chronic pulpitis)、牙发育(tooth development)、牙周袋(periodontal pocket)、牙萌出(tooth eruption)、不完全(incomplete)、釉质发育不全(enamel hypoplasia)
[单选题]釉质发育不全(enamel hypoplasia)是因为()
A. A.牙萌出(tooth eruption)后患儿缺钙所致
B. B.牙发育期间,全身或局部因素所致
C. C.牙萌出(tooth eruption)后患儿高热所致
D. D.牙萌出(tooth eruption)后患儿缺少维生素所致
E. E.牙萌出(tooth eruption)后患儿营养不良所致