CLINICAL CASE 1 – Pre-operative picture of the area intended to treat. Note the thin biotype. 2 – Initial situation showing Miller Class I defects on region 4 (3 mm) and 5 (2 mm). 3 – A split-full-split thickness flap without releasing incisions is elevated. 4 – The anatomical papillae are de epithelialized. 5 – The collagen matrix Geistlich Mucograft® is placed under the flap. 6 – Immediate post-operative situation after suturing of the flap covering Geistlich Mucograft® completely 7 – Follow-up picture 2 weeks after surgery. 8 – Nice healing of the site 1.5 months post-operative. 9 – Pleasant esthetic outcome 7 months after surgery.