[Tensile strength analysis of three different restoring techniques in canine primary teeth]

ABSTRACT

Extensive caries in the primary anterior teeth is one of the highly prevalent dental issues in primary dentition. On the other hand, special considerations for restoring these teeth are a challenge for the dental practitioner. The aim of this in vitro study was to compare the tensile bond strength of a new method of Reverse Metal Post Technique [RMPT] with two conventional methods. Eighty-four extracted primary canines were assigned to three equal groups. The crowns were cut-off 1 mm coronal to CEJ and the root canals were prepared for the next stage. The teeth were restored according to the groups they were assigned to; Group 1 with composite posts; Group 2 with alpha-shaped orthodontic wires; and Group 3 with the RMPT. The specimens were then subjected to tensile force by a mechanical testing machine. Data were analyzed using ANOVA, tukey post hoc, Chi-square and student t test [alpha =0.05]. The mean tensile bond strength for groups 1, 2 and 3 were 6.26 +/- 2.40, 7.35 +/- 1.60 and 9.88 +/- 2.60MPa, respectively. A significant difference was observed between group 3 and the two other groups [p<0.001]. However, the difference between groups 1 and 2 was not statistically significant [p>0.05]. The tensile bond strength was significantly higher in RMPT than the two conventional methods used for restoring severely destroyed primary anterior teeth