Abstract
Recently we experienced luxation of A caused by a hit-wound in a boy 4 years and 1 month old. Clinical findings showed slight extrusion and tooth mobility, occlusion pain, and bleeding from the gingival sulcus. In the X-ray fingings, expansion of the periodontal membrane space was seen slightly but not distinctly. Bone fracture lines or fracture lines of the dental roots were not seen. Reduction and fixation between C were performed by the direct bonding method with the use of flexible quickpreparation adhesive resin and wire. Canal filling with paste was done by using calcium preparations and the prognosis was observed after removing the fixation.
About three years after treatment, root resorption of A was slightly delayed as compared with A. However, clinical discomfort or inflammatory findings in the X-ray examination were not found. Exchange with the succedaneous permanent tooth was completed smoothly. In the X-ray photos about four years after treatment, no abnormalities were found in the formation of the dental roots for both _??__??_a_n?d? _t he prognosis to date has been favorable.
