| Abstract text: |
When it comes today’s trends in modern dentistry the majority of practitioners, when faced with large tooth lesions which require endodontic treatment before the coronal restoration, prefer to use prefabricated post and core systems. The shape of the root portion of the posts, varies greatly from system to system, and with every new generation, it is being improved. These improvements, though, bring forth another problem, consisting of a level of unpredictability when it comes to the forces that are being exerted on the hard dental substance during engagement. In other words, with every new system that is marketed we have different behavior from the tooth root, during the anchorage process and also during normal physiological stress. This stress generated behavior, needs to be studied in order to correctly plan a treatment, treatment which would have beneficial effects on the patient. Using the photo-elasticity method we were able to reveals areas subjected to great amounts of stress during the cementing of Dentatus devices. By using a strain gauge method, the values of the tensions were measured, and this fact enabled us to establish a cementing technique, which would come to prevent stress accumulation and could offer a greater retention while reducing this stress. |
