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KMID : 0358920160430030254
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Journal of the Korean Academy of Pedodontics
2016 Volume.43 No. 3 p.254 ~ p.263
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Prognosis of Replanted Permanent Incisors after Avulsion Injury: A Retrospective Study
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Lee Hyung-Sub
Kim Young-Jin
Kim Hyun-Jung
Kim So-Hyun
Nam Soon-Hyeun
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Abstract
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Many studies on the prognosis of avulsed teeth were published but follow-up studies on Korean children and adolescents are insufficient. The aim of this study was to identify clinical factors determining the healing and prognosis of permanent incisors that were replanted after avulsion injury. This study included 184 permanent teeth in 142 patients aged 6-14 years. The clinical and radiographic data of the patients were analyzed from electronic medical records. Immature teeth had a higher probability of pulp revascularization than mature teeth. When extra-alveolar time was longer than 60 minutes, the incidence of inflammatory root resorption (IRR) was higher in immature teeth than mature teeth. However, the incidence of replacement root resorption (RR) was higher in mature teeth than immature teeth under the same condition. The incidence of IRR was increased when pulp was extirpated more than 20 days after replantation. IRR had a more significant influence on the decrease of survival expectation than RR. There was no significant correlation between the root development stage and survival expectation. However, when RR occurred, immature teeth survived shorter than mature teeth. Long term follow-up results from this study are expected to be used as fundamental data for the treatment guidelines and evaluation of the prognosis of replanted teeth.
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KEYWORD
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Avulsion, Pulp revascularization, Inflammatory root resorption, Replacement root resorption
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