Iranian Dental Association Journal of Iranian Dental Association 3060-8201 23 4 2011 12 01 Tensile strength analysis of three different restoring techniques in canine primary teeth 217 224 EN Ali reza Eshghi Raha Kowsari- Esfahan Saeid Khatami Mahdi Nekouei Hamid Mazaheri maryam Khoroushi Journal Article 2011 12 15 2013 02 23 <font size="2"> Tensile strength analysis of three different restoring techniques in canine primary teeth </font> <i> </i> Dr. Eshghi A .,1 Dr. Kowsari - Esfahan R ., 2 Dr. Khatami S .,3 Dr. Nekouei M.,3 Dr. Mazaheri H., 4  <u> Dr. </u><u>Khoroushi </u><u>M. </u>4 <u />   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 .   <i> (Received 31 Jan, 2011 Accepted 29 June, 2011) </i><i /> <i> </i> <i> Abstract </i><i /> <i /> <i> Background </i><i>and </i><i>Aim </i>: 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 <i>in vitro</i> study was to compare the tensile bond strength of a new method of Reverse Metal Post Technique (RMPT) with two conventional methods.  <i> Materials </i><i>and </i><i>Methods </i>: 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).  <i> Results </i>: 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).  <i> Conclusion </i>: The tensile bond strength was significantly higher in RMPT than the two conventional methods used for restoring severely destroyed primary anterior teeth.  <i> Key words </i>: Primary anterior teeth – Composite restoration <i>– </i><i />Intra - canal post – Tensile bond strength <i /> <i> </i> <i> Corresponding Author: </i><i /><i>Dr. </i><i>Khoroushi </i><i>M .,</i><i> </i><i>Associate Professor </i><i>, </i><i>Department of </i><i>Operative </i><i>Dentistry, School of Dentistry, Isfahan University </i><i>of Medical Sciences </i><i>. </i><i /><i>Isfahan </i><i>, Iran </i><i>. </i> <i> e.mail: </i><i>Khoroushi@dnt.mui.ac.ir </i>