Abstract: Mandibular fractures are rear in infants, diagnosis and treatment are different from adult mandibular fractures. Infants' mandibular fractures always present a challenge, we must not only consider the treatment plan according to the mandibular fracture type, but also focus on the infants' teeth eruption and mandible development. This article reported a 4-month-old male infant with mandibular symphysis fracture who underwent reduction of the fracture and circummandibular fixation using denture base. The denture base was removed 3 months after surgery and the mandibular fracture healed.

Key words: Infant, Mandibular fractures, Denture base