fa Influence of Different Bonding Agents and Composite Resins on Fracture Resistance of Reattached Incisal Tooth Fragment ترمیمی Cosmetic and Restorative Dentistry پژوهشي Research <b> Statement of Problem</b>: Reattachment of the fractured tooth fragment should be considered as a conservative treatment and valid alternative to a composite restoration. Purpose: This in vitro study was to evaluate the influence of different adhesives and composite resins on fracture resistance of dental fragment reattached to the sectioned incisal edges. <div>  <b>Materials and Method:</b> 120 sound human maxillary central incisors were selected under standard conditions and randomly divided into 3 groups, 12 sound teeth were used as a control group and the remaining teeth were assigned to 3 groups (n=36) and each group into three subgroups (n=12). The incisal third of the samples was sectioned using a diamond disk and the respective fragments were then reattached utilizing different intermediate restorative materials, namely: i) adhesive materials alone (OptiBond S or OptiBond XTR or OptiBond All-in-One ii) Premise flowable composite and iii) Point 4 composite in the one of the mentioned adhesive interface. After storage for two weeks at 37°C and 100% humidity and then thermocycling shear bond strength (SBS) was recorded in kilogram force (kgf) by applying a load in the middle incisal third with a Zwick Universal Testing Machine at a cross-head speed of 1 mm/min. Data was analyzed with one-way ANOVA and Tukey HSD (p< 0.05).</div><div><b> Results: </b>The control group had a significantly higher SBS than other groups (p= 0.001) the highest SBS values were obtained using the Premise flowable composite and OptiBond S adhesive (112.44±30.46 MPa) and the lowest with OptiBond All-in-One alone (33.97± 15.63 MPa).</div><div><b> Conclusion:</b> Although, none of the tested materials provided fracture resistance similar to that found with the intact maxillary central incisors utilizing the Premise flowable composite and OptiBond S adhesive improved the SBS of the reattached fragment than other materials.</div><hr><p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><b>Source: </b>Journal of Dentistry Shiraz University of Medical Sciences </p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><a href="http://dentjods.sums.ac.ir/index.php/JDSUMS/article/view/569" target="_blank"><font color="#0000ff">Full Text</font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-3065&slc_lang=fa&sid=1 AR Davari 100319475328460014181 100319475328460014181 No School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran M Sadeghi mostafa.sadeghi110@yahoo.com 100319475328460014182 100319475328460014182 Yes School of Dentistry, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.