Calderon S, Kaplan I, Gal G
Department of Oral & Maxillofacial Surgery, Beilinson Medical Center, Tel-Aviv University, Sackler School of Dentistry, Petah-Tiqua, Israel.
Endod Dent Traumatol. 1995 Apr;11(2):105-7. doi: 10.1111/j.1600-9657.1995.tb00468.x.
A case of multiple fractures of the mandible following a car accident in a five-year-old patient is reported. The fracture line passed distal to the first molar tooth bud. The fracture was treated by wire osteosynthesis and skeletal fixation. During the ensuing 18 months, a gradual arrest of the development of the first molar tooth bud was radiologically observed. The eruption process had not been disturbed, and the tooth erupted at the age of 6 1/2 years. Since the distal root had completely failed to develop and the mesial roots showed a diminished size, the tooth was extracted. Histopathological examination revealed disturbed dentin apposition, there was almost complete obliteration of the pulp chamber by globular dentin, and evidence of root resorption.
报告了一名五岁患者在车祸后发生下颌骨多处骨折的病例。骨折线经过第一磨牙牙胚远中侧。骨折采用钢丝骨合成和骨骼固定治疗。在随后的18个月中，放射学观察到第一磨牙牙胚发育逐渐停滞。萌出过程未受干扰，该牙在6岁半时萌出。由于远中根完全未发育，近中根尺寸减小，该牙被拔除。组织病理学检查显示牙本质附着紊乱，牙髓腔几乎完全被球形牙本质闭塞，并有牙根吸收的迹象。
