Minor tooth movement (M. T. M.) を応用した幼若永久歯外傷の整復症例

DOI 参考文献16件
  • 駿河 由利子
    Department of Pediatric Dentistry, School of Dentistry, Iwate Medical University
  • 野坂 久美子
    Department of Pediatric Dentistry, School of Dentistry, Iwate Medical University
  • 塚本 暁子
    Department of Pediatric Dentistry, School of Dentistry, Iwate Medical University
  • 甘利 英一
    Department of Pediatric Dentistry, School of Dentistry, Iwate Medical University

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  • Repositioning of immature permanent teeth with displacement due to trauma by minor tooth movement (M. T. M.)

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We report two cases of subluxation of upper incisors, in which repositioning was performed by M. T. M. with good prognosis.<BR>Case 1 was a boy aged 7 years and 7 months who sustained trauma 21_??_1 in a fall. On initial examination, 21_??_1 were displaced lingually, which prevented posterior occlusion. Since the injury was three days old, M. T. M. was used for repositioning. After three weeks of M. T. M., retention was performed for two weeks. At 4 months after the fall, as 1 showed inflammation in the coronal pulp, vital pulpotomy was performed. The course after treatment has been good for the last three years, although narrowing of the pulp cavity was observed in 1_??_1. In 21_??_1, the pulp was vital, and root formation was complete without changes in the tooth color.<BR>case 2 was a boy aged 14 years and 9 months, who came with fresh injury in the maxillary anterior region in a collision, accompanying lingual displacement of _??_12 and extrusion of _??_2. On initial examination, root formation was complete and the pulp was positive in the pulp vitality test in _??_12. For treatment, reposition by M. T. M. for 2 months, followed by retention for 6 months. Since the pulp became negative in the vitality test 6 months after the collision, root canal treatment was performed. Long-term retention was thought to be necessary for extruded teeth.<BR>Thus, it was demonstrated that M. T. M. causes minimal damage to the pulp of teeth presenting old luxation with little root resorption of extruded teeth, which is associated with a poor prognosis, facilitating long-term preservation of the teeth.

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