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Effect of periodontal ligament removal with gauze prior to delayed replantation in rabbit incisors on rate of replacement resorption
Author(s) -
Maslamani Manal,
Joseph Bobby,
Gabato Severino,
Andersson Lars
Publication year - 2018
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12398
Subject(s) - replantation , periodontal fiber , ankylosis , cementum , medicine , dentistry , resorption , tooth replantation , root canal , maxillary central incisor , root resorption , dentin , surgery , pathology
Abstract Background/Aim Delayed (dry storage > 60 minutes) replantation results in ankylosis and replacement resorption. It has been suggested to remove the non‐viable periodontal ligament before replantation to possibly reduce the rate of replacement resorption. However there has been no study on the rate of replacement resorption after such measures. The aim of this study was to investigate if there was any difference in the rate of replacement resorption by either removing the periodontal ligament ( PDL ) with gauze or not removing PDL in teeth subjected to delayed replantation followed by healing for 2 or 6 weeks. Materials and Methods Maxillary central incisors were extracted in 8 rabbits. In the right central incisors, the necrotic PDL was removed by dry gauze over the root surface. In the left eight extracted teeth PDL was left on the root surface. All extracted teeth were left to dry for 60 minutes. Extra‐oral root canal treatment was performed before replantation. The rabbits were sacrificed after 2 weeks and 6 weeks respectively. Histologic processing and evaluation was done. Results In the 2 weeks group, all teeth showed ankylosis. The cementum was intact, and fusion of the bone and root was generally seen without resorption of the root, whereas in the 6 weeks group regardless of whether PDL had been kept or not, ankylosis and osseous replacement of the dentin was seen. There was no evidence of inflammatory infiltrate in the sections examined. Conclusion Removal of PDL prior to delayed replantation may result in some initial protection of the cementum during the first few weeks. However, over longer times there seems to be neither protection of the dentin from ankylosis and osseous replacement, nor any influence on the rate of replacement resorption.