Comparative Evaluation of the Effect of Adhesive Restorative Techniques on the Reinforcement of Simulated Immature Permanent Teeth: An in Vitro Study

Kumpatla Madhavi

doi:10.37591/jopc.v10i3.6771

Abstract

The aim of the study was to compare the reinforcement effect of 3 different adhesive restorative techniques on simulated immature maxillary central incisors after apexification. A total of 30 simulated immature permanent maxillary central incisors were randomly assigned into 3 groups (n=10), according to the reinforcing technique used: Group 1: Nanohybrid composite. (Tetric N-Ceram Ivoclar Vivadent), Group 2: Short-fiber reinforced composite (everX posterior GC EUROPE) extended 3mm below CEJ, covered with 1mm layer of Nanohybrid composite, Group 3: polyethylene fibre (Ribbond Inc., Seattle, WA, USA)) along with Short-fiber reinforced composite (everX posterior GC EUROPE), covered with a 1mm layer of Nanohybrid composite. These specimens were subjected to a compressive load at a speed of 0.5 mm/min on the incisal edge of the crown at a 1350 angle with the long axis of the tooth using a Universal testing machine. The data thus obtained was tabulated and subjected to statistical evaluation using a One-way analysis of variance (ANOVA) followed by Tukey’s post hoc analysis. P value of <0.05 was considered statistically significant for all the comparisons, and a confidence interval of 95% was taken. Results showed that the mean fracture load values for the samples were as follows: Group 1:- 273.8000±103.35099N, Group 2:- 469.4800±165.4N, Group 3: -451.5100±148.04774N. The highest mean load required to fracture the samples was found in Group 2. Group 1 showed significantly lower fracture resistance compared to Group 2 (p-0.012) and Group 3(p-0.024). There was no significant difference in mean fracture load values between Groups 2 and 3. Intra-coronal and intra-radicular reinforcement using Short-fibre reinforced composite and Intra-coronal reinforcement using a combination of polyethylene fibre with Short-fibre reinforced composite showed significant improvement in fracture resistance of immature permanent teeth after apexification.