Figure 1: Representative sections obtained from furcal perforation sites repaired with Geristore (a-c). a. Masson trichrom-stained section showing no reparative hard tissue apposition (open arrowhead) over the furcation site and severe interradicular bone resorption (open arrow). RD: radicular dentin. (Original magnifications 30X). b. Section from another specimen showing multinucleated osteoclast cells (open arrowhead) and inflammatory cells infiltrate separated by a tunnel defect (open arrowhead). (Original magnification 40X). c. Modified trichrome-stained section showing multinucleated osteoclast cells (open arrowhead) and resorptive lacunae (open arrow).