title: Prognosis of intentional replantation of vertically fractured roots reconstructed with dentin-bonded resin.
abstract: There is no particular treatment established to preserve vertically fractured teeth. We evaluated the long-term prognosis of the intentional replantation of 26 vertically fractured roots after reconstruction with 4-META/MMA-TBB dentin-bonded resin. Replanted teeth were evaluated according to clinical criteria and radiographic examinations for periods ranging from 4 to 76 months. Eighteen cases were functional and retained, with six fully successful; the others needed further observation. Eight cases failed to respond to treatment because of refracture, recurrence of gingival inflammation, or both. Longevity was calculated as 88.5% at 12 months after replantation, 69.2% at 36 months, and 59.3% at 60 months. All failures occurred in premolar and molar teeth. Longitudinal fractures extending more than 2/3 from the cervical portion toward the apex showed significantly shorter longevity compared with fractures within the 2/3 area (log-rank test, p = 0.02). Intentional replantation of vertically fractured roots reconstructed with dentin-bonded resin may be considered for incisors as an alternative to extraction, although the long-term success is not optimal.
authors.affiliation: Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Suita, Japan. mikarin@dent.osaka-u.ac.jp
authors.forename: Mikako
authors.initials: M
authors.lastname: Hayashi
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Kinomoto
authors.forename: Fumio
authors.initials: F
authors.lastname: Takeshige
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Ebisu
mesh_terms: D000328:Adult; D000368:Aged; D001896:Boron Compounds / Q000627:therapeutic use; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008689:Methacrylates / Q000627:therapeutic use; D008768:Methylmethacrylates / Q000627:therapeutic use; D008875:Middle Aged; D011379:Prognosis; D019279:Resin Cements / Q000627:therapeutic use*; D016019:Survival Analysis; D014082:Tooth Fractures / Q000601:surgery / Q000628:therapy*; D014090:Tooth Replantation; D014092:Tooth Root / Q000293:injuries*
chemical_list: D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; C049495:Super-bond