Fig. 4. Histology of LPM membrane specimen demonstrates the periodontal ligament (PL) and new bone (NB) in the furcation area. A new cementum layer (arrows) can be seen on the root surface (HE, original magnification×100).
Fig. 5. RPM membrane specimen shows the insertion of collagen fibers into the root surface (arrows) and newly formed bone trabecule (NB). PL: periodontal ligament; and RS: root surface (HE, original magnification×200).