<qa>  What is the baseline time period for patients with insufficient signs of healing at the 6 months visitPatients who have agreed participate and have signed an informed patient consent prior to surgery will be included. Follow-up visits will be performed at the following time points: baseline pre-and postoperative, at 6 weeks, 12 weeks, 6 months, and 12 months for patients with insufficient signs of healing at the 6 months visit; otherwise preferable visit. 