What is the first line of offense when removing paste fillers?
A. When evaluating a paste case for retreatment, it is wise to recognize that certain pastes are very difficult to remove because they set up brickhard. However, it is important to appreciate that due to the method of placement, the most dense portion of the paste is in the coronal one-third and the material is generally less dense moving in an apical direction. Ultrasonic instruments, in conjunction with the microscope, afford excellent control in removing paste from the straight-away portions of the canal. To remove paste apical to canal curvature, use a precurved stainless steel file attached to a specially designed file adapter (SybronEndo) that hooks to the ultrasonic handpiece (Satelec P5, Dentsply Tulsa Dental). Other removal methods include heat, end-cutting rotary NiTi instruments, chemicals such as Endosolv R and Endosolv E (Endoco) and Micro-Debriders (Dentsply Maillefer). For further technique information on the removal of paste fillers, see also the Ruddle on Retreatment v
A. When evaluating a paste case for retreatment, it is wise to recognize that certain pastes are very difficult to remove because they set up brickhard. However, it is important to appreciate that due to the method of placement, the most dense portion of the paste is in the coronal one-third and the material is generally less dense moving in an apical direction. Ultrasonic instruments, in conjunction with the microscope, afford excellent control in removing paste from the straight-away portions of the canal. To remove paste apical to canal curvature, use a precurved stainless steel file attached to a specially designed “File Adapter” (SybronEndo) that hooks to the ultrasonic handpiece (P5, Dentsply Tulsa Dental). Other removal methods include heat, end-cutting rotary NiTi instruments, chemicals such as Endosolv R and Endosolv E (Endoco) and Micro-Debriders (Dentsply Maillefer). For further technique information on the removal of paste fillers, see also the Ruddle on Retreatment DVD ent
