RETROGRADE SEALING OF ACCIDENTAL ROOT PERFORATIONS WITH DENTIN-BONDEDCOMPOSITE RESIN

Surgical treatment was performed on 100 latrogen perforations, of whic h 94 showed radiolucency of bone adjacent to the perforation and 83 pr esence of an exposed post. The perforations were in all cases sealed w ith a resin composite (Retroplast) bonded to adjacent root dentin with a dentin bonding agent (Gluma), Cases were examined after similar to 1 yr (first recall) and, if necessary after 11/2 to 11 yr (mean: 4.1 y r) (latest recall). It was observed that the presence or absence of bo ne on the root between the perforation and cervix at the time of opera tion had no significant effect on the healing result, and that the rad iographic classification ''partial'' healing with a border of cortical bone or a lamina dura often remained unchanged for many years, At lat est recall, the healing result of 65 teeth originally having root perf oration elsewhere than at the furcation was: 71% complete, 11% partial , 3% uncertain, and 15% failure. This is significantly different from the healing result of 27 molar teeth originally having perforation at the furcation: 30% complete, 41% partial, 11% uncertain, and 18% failu re.