多生牙是一种比较常见的牙齿数目发育异常,指牙齿数目多于正常牙列(乳牙列20颗,恒牙列28-32颗)[1],可发生在牙弓的任何部位,以上颌前牙区多见,其发生率为1~3[2],一般为1~2颗,多于3颗的多发性多生牙的发生较为少见。我院接诊双侧下颌前磨牙区多发性多生牙3例,现报道如下。病例1患者,男,12岁,因“摄片发现双侧下颌多生牙”就诊。患者无系统性疾病史。患者因牙列不齐来院 Juvenile teeth is a more common number of teeth dysplasia, refers to the number of teeth more than normal dentition (20 teeth deciduous, permanent dentition 28-32) [1], may occur in any part of the dental arch, above Anterior maxillary area of ​​the jaw more common, the incidence of 1 to 3 [2], usually 1 to 2, more than 3 multiple occurrence of multiple polyps is relatively rare. Our hospital access to bilateral mandibular premolar multiple polyneonal teeth in 3 cases, are reported below. Case 1 patients, male, 12 years old, because of “radiography found bilateral lower jaw more teeth ” treatment. No history of systemic disease in patients. Patients due to dentition missing hospital