en پریودنتولوژی Periodontology پژوهشي Research <p> <strong>Background:</strong> The ability of mineral trioxide aggregate (MTA) to strengthen the tooth structure has been studied with contradictory results, and there is a lack of data in the case of Calciumenriched mixture (CEM) cement as a novel endodontic biomaterial. The aim of the present study was to evaluate the reinforcing effect of MTA and CEM cement on simulated immature teeth. </p><p> <strong>Materials and Methods:</strong> This ex vivo study was carried out on a total of 46 human maxillary incisors. Access cavities were prepared. Five teeth were randomly selected as negative control. The root length of the remaining teeth was standardized to 9 mm. Rotary files and peeso reamers were used to enlarge the canals. The prepared specimens were randomly assigned into three experimental (n = 12) and a positive control (n = 5) groups. In groups 1 and 2, the canals were filled with MTA or CEM cement, respectively. In group 3, a 5-mm MTA plug was placed, and the remainder of the canal was filled with composite resin. The canals of the positive control were kept unfilled. After 6 months, the teeth were tested for fracture strength in a universal testing machine. The groups were compared using Univariate analysis of variance (ANOVA). <strong>Results:</strong> There were significant differences between fracture strength of experimental groups with that of both control groups (P<0.05). However, the differences among the three experimental groups were not statistically significant (P>0.05).<strong> </strong></p><p> <strong>Conclusion:</strong> After 6 months, MTA and CEM cement exhibit distinct reinforcing effect on immature teeth. </p><hr><p></p><p> <strong>Source: </strong>Dental Research Journal </p><p> <a href="http://drj.mui.ac.ir/index.php/drj/article/view/1088" target="_blank"><font color="#0033ff">Full Text</font></a></p> Calcium-enriched mixture cement, fracture resistance, fracture strength,immature teeth, mineral trioxide aggregate 0 0 http://idai.ir/browse.php?a_code=A-10-32-691&slc_lang=en&sid=1 Amin Salem Milani amin.salemmilani@gmail.com 10031947532846002890 10031947532846002890 Yes Saeed Rahimi 10031947532846002891 10031947532846002891 No Faculty of Dentistry Zahra Borna 10031947532846002892 10031947532846002892 No Faculty of Dentistry, Urmia University of Medical Sciences, Urmia, Iran Mohammad Asghari Jafarabadi 10031947532846002893 10031947532846002893 No Faculty of Health and Nutrition Mahmoud Bahari 10031947532846002894 10031947532846002894 No Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz Alireza Sighari Deljavan 10031947532846002895 10031947532846002895 No Faculty of Dentistry