表 1.

患牙情况及临床特征(n=84)

Demographics and clinical characteristics of the teeth (n=84)

Variables	Data
Age/years, x±s	10.25±2.13
Gender, n(%)
Male	54 (64.3)
Female	30 (35.7)
Tooth type, n(%)
Anterior	37 (44.0)
Premolar	47 (55.9)
Etiology, n(%)
Broken central cusp	45 (53.6)
Trauma	35 (41.7)
Caries	4 (4.8)
Diagnosis, n(%)
Pulp necrosis	5 (6.0)
Acute apical abscess	15 (17.9)
Asymptomatic apical periodontitis	5 (6.0)
Chronic apical abscess	31 (36.9)
Symptomatic apical periodontitis	28 (33.3)
Follow-up period/months, x±s	44.7±19.3