Delayed intentional replantation of periodontally hopeless teeth: a retrospective study
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Purpose: The purpose of this study was to retrospectively evaluate the survival of periodontallyhopeless teeth that were intentionally extracted and replanted after a delay and to comparethe radiographic characteristics of the survival group with those of the failure group. Methods: The clinical and radiographic data from patients who underwent delayed intentionalreplantation between March 2000 and July 2010 were reviewed. Twenty-seven periodontallyhopeless teeth were extracted and preserved in medium supplemented with antibioticsfor 10–14 days. The teeth were then repositioned in the partially healed extractionsocket and followed for 3 to 21 months. The radiographic parameters were analyzed using apaired t test and the cumulative survival rate was analyzed using Kaplan-Meier analysis. Results: Seven replanted teeth failed and the overall cumulative survival rate was 66.4%. In the survival group, the amount of bone loss was reduced from 68.45% to 34.66% threemonths after replantation. There was radiologic and clinical evidence of ankylosis with 5teeth. However, no root resorption was found throughout the follow-up period. In the failuregroup, bone formation occurred from the bottom of the socket. However, a remarkableradiolucent line along the root of a replanted tooth existed. The line lengthened and thickenedas time passed. Finally, in each case of failure, the tooth was extracted due to signs ofinflammation and increased mobility. Conclusions: Delayed intentional replantation has many advantages compared to immediateintentional replantation and could serve as an alternative treatment for periodontallyinvolved hopeless teeth. However, techniques for maintaining the vitality of periodontalstructures on the tooth surface should be developed for improved and predictable results.
Abstract
Purpose: The purpose of this study was to retrospectively evaluate the survival of periodontallyhopeless teeth that were intentionally extracted and replanted after a delay and to comparethe radiographic characteristics of the survival group with those of the failure group. Methods: The clinical and radiographic data from patients who underwent delayed intentionalreplantation between March 2000 and July 2010 were reviewed. Twenty-seven periodontallyhopeless teeth were extracted and preserved in medium supplemented with antibioticsfor 10–14 days. The teeth were then repositioned in the partially healed extractionsocket and followed for 3 to 21 months. The radiographic parameters were analyzed using apaired t test and the cumulative survival rate was analyzed using Kaplan-Meier analysis. Results: Seven replanted teeth failed and the overall cumulative survival rate was 66.4%. In the survival group, the amount of bone loss was reduced from 68.45% to 34.66% threemonths after replantation. There was radiologic and clinical evidence of ankylosis with 5teeth. However, no root resorption was found throughout the follow-up period. In the failuregroup, bone formation occurred from the bottom of the socket. However, a remarkableradiolucent line along the root of a replanted tooth existed. The line lengthened and thickenedas time passed. Finally, in each case of failure, the tooth was extracted due to signs ofinflammation and increased mobility. Conclusions: Delayed intentional replantation has many advantages compared to immediateintentional replantation and could serve as an alternative treatment for periodontallyinvolved hopeless teeth. However, techniques for maintaining the vitality of periodontalstructures on the tooth surface should be developed for improved and predictable results.
참고문헌 (19)
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