en ترمیمی Cosmetic and Restorative Dentistry پژوهشي Research <table><tbody><tr><th valign="middle" width="95%">Clinical Relevance</th></tr></tbody></table><p> Dentists should read scientific papers carefully when searching for evidence for a specific treatment approach regarding postendodontic restoration, since inappropriate methodology may result in misleading clinical recommendations.</p><table><tbody><tr><th valign="middle" width="95%">SUMMARY</th></tr></tbody></table><p> <strong>Objective: </strong>The load capability of post-restored endodontically treated teeth (ETT) can be determined at different restorative stages. It was the aim of this study to compare the load capability of ETT at these stages.</p><p> <strong>Materials and Methods: </strong>Maxillary central incisors were divided into 4 groups (n=10) and endodontically treated. Specimens were restored with: (I) only glass fiber posts (GFP) (II) GFP and composite build-up with 2 mm ferrule (III and IV) with additional adhesively luted all-ceramic crowns. Group (I) to (III) were statically loaded, and group (IV) was exposed to thermomechanical loading (TML) and subsequent static loading.</p><p> <strong>Results: </strong>The lowest median load level of 73 N was determined for group (I). The maximum median load value of 331 N was found for group (III). The comparison of Fmax [N] of group (I), (II) and (III) revealed significant differences between the groups (p<0.001). The specimens of group (IV) failed at significantly lower load values (p<0.005) as similarly restored specimens of group (III) which were only statically loaded. The stage of restoration and TML loading prior to static loading had a significant impact on fracture patterns (p=0.006).</p><p> <strong>Conclusion: </strong>Every additional restorative step torwards a final crown-restored ETT significantly increased the load capability. TML prior to load-to-fracture testing of the complete restorative complex, ie. post, core and crown, significantly decreased maximum load capability.</p><hr><p></p><p> <strong> Source: </strong>Operative dentistry </p><p><a href="http://www.jopdentonline.org/doi/abs/10.2341/10-355-L" target="_blank"><font color="#0000cc">  Full text </font></a></p> 0 0 http://idai.ir/browse.php?a_code=A-10-32-242&slc_lang=en&sid=1 Guido Sterzenbach 1003194753284600966 1003194753284600966 No Geriatric Dentistry, and Craniomandibular Disorders, Charité–Universitätsmedizin Berlin, Berlin, Germany Martin Rosentritt 1003194753284600967 1003194753284600967 No Regensburg University Medical Center, Regensburg, Germany Roland Frankenberger 1003194753284600968 1003194753284600968 No University of Marburg, Marburg, Germany Sebastian Paris 1003194753284600969 1003194753284600969 No School for Dental Medicine, Christian Albrechts-Universität zu Kiel, Kiel, Germany Michael Naumann micha.naumann@gmx.de 1003194753284600970 1003194753284600970 Yes Center of Dentistry, University of Ulm, Ulm, Germany