Comparative evaluation of fracture resistance of simulated immature teeth restored with glass fiber posts, intracanal composite resin, and experimental dentine posts.

AIM: The aim of this study was to compare the fracture resistance of simulated immature teeth restored with gutta-percha, glass fiber posts (GFP), experimental dentine posts (DP) or Intracanal composite Resin (ICR). MATERIALS AND METHODS: Fifty maxillary canines were decoronated, standardized and enlarged until, number 5 Peeso reamers were allowed to simulate immature teeth. After placement of 5 mm of MTA, the canals were divided into 5 groups and filled as follows: Group 1: AH Plus + gutta-percha, lateral compaction; Group 2: GFP luted with PARACORE dual cure resin; Group 3: DP luted with PARACORE dual cure resin; Group 4: PARACORE dual cure resin. A standardized core was built in all groups except in Group 5. Each of the specimens was tested for fracture resistance by universal testing machine. RESULTS: The mean fracture resistance were 817 +/- 27.753, 1164.6 +/- 21.624, 994.4 +/- 96.8747, 873.8 +/- 105.446 and 493.7 +/- 6.945 newtons for Groups 1, 2, 3, 4, and 5 respectively. Independent "t" test revealed statistically significant discrepancies, in the fracture resistance among the 4 groups except Group 1 and Group 4 (P < 0.05). CONCLUSIONS: This study suggests that GFP and DP may be preferred for additional reinforcement of immature teeth.