Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology, University Hospital of Würzburg, Würzburg, Germany.
Private Practice, Hamburg, Germany.
Dent Traumatol. 2019 Apr;35(2):147-152. doi: 10.1111/edt.12445. Epub 2018 Oct 29.
Ankylosis and external replacement resorption (ERR) are two typical biological responses to delayed replantation of avulsed teeth in cases where adequate root canal treatment is performed. The patient's growth stage affects the progression of root resorption and the long-term outcome of the affected teeth. This case report describes the long-term outcome of an 18.5-year-old patient following an accident in which both of his maxillary central incisors were avulsed and replanted after four hours of non-physiological storage. ERR and ankylosis of teeth 11 and 21 were detected clinically and radiographically during the second year of follow-up. Sixteen years after replantation, replacement resorption was progressing very slowly, enabling functional tooth retention with favorable esthetics. Young adults, with delayed replantation of avulsed teeth, may benefit from tooth retention with slow ERR.
在对已充分进行根管治疗的外伤性脱位牙进行延迟再植的情况下，发生附着丧失和外部替换吸收（ERR）是两种典型的生物学反应。患者的生长阶段会影响根吸收的进展和受影响牙齿的长期预后。本病例报告描述了一位 18.5 岁患者在事故中双侧上颌中切牙脱位并在非生理储存 4 小时后再植后的长期预后。在第二年的随访中，临床和影像学检查发现 11 号和 21 号牙发生 ERR 和粘连。再植后 16 年，替代吸收进展非常缓慢，能够以良好的美观维持功能牙的保留。对于延迟再植外伤性脱位牙的年轻患者，保留牙齿并发生缓慢的 ERR 可能会带来益处。
