title: Fate of developing tooth buds located in relation to mandibular fractures in three infancy cases.
abstract: The fate of developing tooth buds located in relation to mandibular fractures was investigated in three infancy cases. Three infants, 2 girls and a boy, aged from 1 year and 5-months old to 2 years and 6-months old, were treated for dislocated mandibular fracture in the symphyseal region by manual reduction and fixation with a thermoforming splint and circumferential wiring under general anesthesia. Fracture healing was uneventful in all cases. A few years later, no obvious deformity of the jaw or malocclusion was observed; however, malformation of the crown was found in one of the permanent teeth on the fracture line in the first case. In the second case, no abnormality was observed in one of the permanent teeth on the fracture line, but the effect on the other tooth could not be evaluated due to abnormality of the tooth probably not related to the injury. In the third case, root formation was arrested in one of the permanent teeth on the fracture line and the tooth was lost early after eruption. The development of tooth buds on the fracture line is not predictable and therefore, should be monitored by regular follow up.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Nara Medical University, Japan. kazuyama@naramed-u.ac.jp
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Matsusue
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Murakami
authors.forename: Satoshi
authors.initials: S
authors.lastname: Horita
authors.forename: Yuri
authors.initials: Y
authors.lastname: Matsubara
authors.forename: Miho
authors.initials: M
authors.lastname: Kuraki
authors.forename: Miyako
authors.initials: M
authors.lastname: Kurihara
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Imai
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sugiura
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Kirita
mesh_terms: D001864:Bone Wires; D002675:Child, Preschool; D003481:Cuspid / Q000002:abnormalities; D005260:Female; D005500:Follow-Up Studies; D017102:Fracture Healing / Q000502:physiology; D005671:Fused Teeth / Q000209:etiology; D006801:Humans; D007180:Incisor / Q000002:abnormalities; D007223:Infant; D004204:Joint Dislocations / Q000503:physiopathology / Q000628:therapy; D008297:Male; D008337:Mandibular Fractures / Q000503:physiopathology / Q000628:therapy*; D009805:Odontogenesis / Q000502:physiology*; D013165:Splints; D019228:Tooth Crown / Q000002:abnormalities; D014083:Tooth Germ / Q000254:growth & development*; D014092:Tooth Root / Q000002:abnormalities; D014094:Tooth, Deciduous / Q000002:abnormalities