Fig. 4

Changes in vertical width at the peri-implant soft tissue sealed area during wound healing. a Low magnification images of representative H&E staining for each time period used to measure each component of the peri-implant soft tissue (bars: 200 μm) are shown. The lowest points of the epithelium are indicated by arrowheads. The downgrowth of non-keratinized epithelium contacting the implant surface was recognized in both the PL and Cont groups. b The vertical distances of each component were measured and analyzed. Values are expressed as means ± SD. **p < 0.01, p < 0.05