Reinforcing effect of a resin glass ionomer in the restoration of immature roots in vitro.
Fifty-six extracted maxillary central incisors were used for this study. The crown of each tooth was removed in order to obtain a standard length of 13 mm. Root canals were enlarged to simulate immature teeth after apexification. The apical 2 mm of the root canal was obturated with gutta-percha and AH26 sealer. The specimens were divided into two groups. Group A was unrestored and served as positive control. In group B, the canal walls were reinforced with a resin modified glass ionomer using a translucent curing post. All teeth were subjected to compressive force using an Instron testing machine until fracture occurred. Group B showed an increased resistance to fracture (456.02 +/- 172.47 N) compared with group A (263.46 +/- 98.00 N). The difference between groups was statistically significant (P < 0.005).
Goldberg
Fernando
F
Department of Endodontics, School of Dentistry, University USAL-AOA, Buenos Aires, Argentina. goldberg@mail.retina.ar
Kaplan
Andrea
A
Roitman
Marcela
M
Manfré
Susana
S
Picca
Mariana
M
D001729:Bismuth; D003188:Composite Resins / Q000627:therapeutic use*; D019245:Compressive Strength; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements / Q000627:therapeutic use*; D006171:Gutta-Percha; D006801:Humans; D007180:Incisor / Q000293:injuries*; D008422:Materials Testing; D008437:Maxilla; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods; D012834:Silver; D014025:Titanium; D014082:Tooth Fractures / Q000517:prevention & control*; D014092:Tooth Root / Q000254:growth & development* / Q000293:injuries
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; C084550:Vitremer; D012834:Silver; C028044:epoxy resin AH-26; D006171:Gutta-Percha; D014025:Titanium; D001729:Bismuth