Research Article

The Human Amniotic Mesenchymal Stem Cells (hAMSCs) Improve the Implant Osseointegration and Bone Regeneration in Maxillary Sinus Floor Elevation in Rabbits

Figure 4

Immunohistochemical staining of α-smooth muscle actin (α-SMA). (a–h) Four groups in the peri-implant and augmented areas at four and 12 weeks. (i–l) Relative vessel-like structure at four and 12 weeks. BO: Bio-Oss; NB: new bone; red arrow: blood vessel-like structure. Scale . ; ).