Comparative Evaluation of Fracture Resistance of Simulated Immature Teeth Restored with Glass Fiber Posts, Intracanal Composite Resin, and Experimental Dentine Posts

Abstract

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.

The restoration of root filled teeth: a review of the clinical literature

“…Possible strengthening of traumatized anterior teeth with wide root canals, by inserting adhesively luted fibre posts, has been suggested (Ree & Schwartz 2017). However, the results of in vitro studies are controversial (Carvalho et al 2005, Seto et al 2013, Brito‐Júnior et al, 2014, Nikhil et al 2015, Topcuoglu et al 2015) and more clinical data are required to support the assumption of strengthening.…”

Endodontic management of traumatized permanent teeth: a comprehensive review

“…2014, Nikhil et al . 2015), whilst others could not demonstrate an additional effect (Carvalho et al . 2005, Seto et al .…”

“…However, there is limited evidence on the additional benefit of a bonded root canal post in immature teeth with only minor loss of coronal tooth structure. Some laboratory studies reported that the use of fibre posts improved the fracture resistance of immature teeth significantly more than composite resin alone (Schmoldt et al 2011, Brito-Junior et al 2014, Nikhil et al 2015, whilst others could not demonstrate an additional effect (Carvalho et al 2005, Seto et al 2013. Backfilling the remaining part of the root canal with guttapercha and sealer resulted in the weakest roots (Schmoldt et al 2011, Brito-Junior et al 2014, Nikhil et al 2015.…”

“…Some laboratory studies reported that the use of fibre posts improved the fracture resistance of immature teeth significantly more than composite resin alone (Schmoldt et al 2011, Brito-Junior et al 2014, Nikhil et al 2015, whilst others could not demonstrate an additional effect (Carvalho et al 2005, Seto et al 2013. Backfilling the remaining part of the root canal with guttapercha and sealer resulted in the weakest roots (Schmoldt et al 2011, Brito-Junior et al 2014, Nikhil et al 2015. Clinical studies demonstrated that highly favourable long-term results can be obtained if the adhesive restoration of immature teeth treated with apical plugs is extended into the root canal to reinforce the thin roots, particularly in the cervical region (Pace et al 2014, Ree & Schwartz 2017.…”

“…2014, Nikhil et al . 2015). Clinical studies demonstrated that highly favourable long‐term results can be obtained if the adhesive restoration of immature teeth treated with apical plugs is extended into the root canal to reinforce the thin roots, particularly in the cervical region (Pace et al .…”