Effect of coltosol®expansion on the crown of teethe ndodontically treated: original study

Introduction: Defective apical seals were identified as the main cause of failures in endodontic treatment, and several studies have emphasized the importance of adequate coronal sealing between sessions for successful endodontic therapy. Objective: to evaluate the effects of Coltosol® prey expansion on the remaining coronary structure of endodontically treated teeth. Methods: Four human molars were used, extracted for reasons unrelated to this work. After the endodontic treatment, they were restored with Coltosol®. Among the 4 teeth used, we changed the measurements of the surrounding walls and the cavity. Two elements with 2 mm of surrounding wall, one with occlusal cavity and one with Mesio-Occlusal-Distal cavity (MOD). Results: The expansion of prey of Coltosol® caused significant tensions in the remaining coronary structure, it was also noticed that teeth that have walls with thickness of 1.0 mm can suffer cracks after the expansion of the obturator and the absence of proximal walls in the cavities Mesio -Occlusion-Distal decreases the tension of the expansion (O) with 1.0 mm of surrounding wall was the most cracks due to stress expansion in the remaining walls. Conclusion: Coltosol® prey expansion can cause significant strains in the remaining coronary structure. Teeth that have 1.0 mm thick walls may be cracked after the shutter expands. The absence of proximal walls in the MOD cavity decreases the expansion strain on the remaining walls.