Fig. 4

HE stain of soft tissues around Zr and Ti healing abutments with or without ligation (the bar = 100 µm) (ZrL: Zirconium healing abutments with ligation; ZrN: Zirconium healing abutments with non-ligation; TiL: Titanium healing abutments with ligation; TiN: Titanium healing abutments with non-ligation)