通常情况下第二前磨牙钙化在5岁时即可在X线片上有所表现,但如果出现发育迟缓,医生检查牙片不仔细而造成误诊,就可能使正畸治疗复杂化。现作者对牙发育不全误诊一例报告如下。 Typically, second premolar calcification occurs at the age of 5 on the X-ray, but orthodontic treatment may be complicated if there is stunting and the doctor misdiagnoses the tooth. The author of a case of misdiagnosis of dental hypoplastic report as follows.