Determination of reinforcement of fibre with composite in root filled teeth, comparison of restoration techniques: an in- vitro technique

INTRODUCTION: Pediatric endodontic procedures has increased steadily in the past decade. Therefore, restoration of teeth after endodontic treatment is becoming an integral part of the restorative practice in dentistry. AIM: To evaluate the compressive strength of root filled deciduous molar teeth with different restorative techniques along with fibre placement. METHODOLOGY: Fifty extracted deciduous molars were taken [Figure No. 2] and divided into four groups. Group 1- served as control, Group 2- pediatric endodontic procedure was performed and were kept unrestored (post obturation restoration). In groups 3 and 4 – post obturation restoration with composite composite was done. A 3mm groove using 343 sized bur was prepared on the occlusal surface of the finished restorations in group 4 from buccal to lingual direction. Glass fibre was inserted in the groove in combination with flowable resin that was cured and covered with composite resin. Cavity surfaces were covered with flowable resin in group 5 and were placed onto the bed of resin in buccal to lingual direction before the composite restoration. Compressive loading of the teeth was performed by a Universal Testing Machine at a crosshead speed of 3mm-1 until failure. Data was recorded in Newton and submitted to Anova and Tukey post hoc test. RESULTS: Fibre when placed from buccal to lingual direction under composite restoration (Group 5) {2213.02(204.4)} significantly increased fracture resistance. CONCLUSION: Post endodontic restoration is an important step necessary step for a good prognosis of the tooth. In the present study restoration has been evaluated along with fibre placement in two variations and fibre placement under the composite restoration was found to be providing a greater compressive strength. However, further studies both in vivo and in vitro need to be done to evaluate the efficiency of fibre placement as a post endodontic restoration.