Abstract: Oblique facial cleft is a rare malformation of the maxillofacial region, which is mainly manifested as a single or composite fissure deformity of the craniofacial soft tissue and bone, and may be accompanied with other deformities such as multiple teeth. The pathogenesis that may be caused by genetic or environmental factors is unclear. This article reports a case of Tessier No.6 cleft with double dentition found in the clinic, which has certain clinical reference value.

Key words: oblique facial cleft, double dentition, jaw deformity