Influence of root morphology on the customized technique for adaptation of glass fiber posts and orthodontic extrusion for achieving the ferrule effect

This study evaluated the clinical outcomes of a customized technique for restoring large-diameter root canals using prefabricated glass fiber posts (GFPs). The approach involved strategic modifications to accommodate increased root diameters and improve restoration longevity. A total of 104 crowns [45 e.max lithium disilicate (LidiSi) monolithic, 17 e.max LidiSi layered, 27 zirconia monolithic, and 15 zirconia layered] were cemented on endodontically treated teeth (ETT) with GFPs adapted using this technique. The restorations demonstrated a 97.1% survival rate over 24 months, confirming the method's effectiveness, minimal invasiveness, and suitability for rehabilitating ETT. The high success rate underscores the durability of this personalized restoration approach. While these findings suggest promising long-term potential, further research is needed to fully assess the biomechanical impact of all involved components.