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

Abstract

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

  

  Dr. Eshghi A .,¹ Dr. Kowsari - Esfahan R ., ² Dr. Khatami S .,³ Dr. Nekouei M.,³ Dr. Mazaheri H., ⁴

  Dr. Khoroushi M.^ 4

  

  ¹ Assistant Professor, Department of Pediatric Dentistry, School of Dentistry, Isfahan University of Medical Sciences . Isfahan , Iran . ^{2 Resident, Department of Pediatric Dentistry, School of Dentistry, Isfahan University of Medical Sciences . Isfahan , Iran . 3 Dentist. 4 Associate Professor , Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences . Isfahan , Iran . 5 Assistant Professor , Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences . Isfahan , Iran .}

 

  (Received 31 Jan, 2011 Accepted 29 June, 2011)

  

  Abstract

 

  Background and Aim : 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.

  Materials and 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 ( α =0.05).

  Results : 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).

  Conclusion : The tensile bond strength was significantly higher in RMPT than the two conventional methods used for restoring severely destroyed primary anterior teeth.

  Key words : Primary anterior teeth – Composite restoration – Intra - canal post – Tensile bond strength

  

  Corresponding Author: Dr. Khoroushi M ., Associate Professor , Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences . Isfahan , Iran .

  e.mail: Khoroushi@dnt.mui.ac.ir