In this paper, we reported a case that simultaneously had maxillary bilateral impacted central incisors with dilaceration and mandibular bilateral fused lateral incisors and canines. 本篇文章将介绍一病例，此病例为上颚双侧正中门齿阻生合并下颚双侧侧门齿与犬齿融合。
Dilaceration is a developmental disturbance in shape of teeth. It refers to an angulation, or a sharp bend or curve, in the root or crown of a formed tooth.