Re-treatment files are now are available as part of the ProTaper Universal system and have been specifically designed to remove obturation material from the root canal.

There are three re-treatment files: D1, D2 and D3, one for each third of the canal. D1 has a cutting tip for effective entrance into the obturation material in the coronal third. D2 and D3 are used in the mid and apical thirds of the canal respectively and have non-active tips that have been designed to closely respect the path of the canal.