**3. Results**

#### *3.1. Improved Osteogenesis*

Various interdisciplinary approaches of surface coating have been performed in terms of biomaterials, drug release, and therapeutic effects [52]. The goal of the most actively studied research on coating or the surface modification of membranes is to improve new bone formation. For this purpose, calcium phosphate (CaP), bioactive glass, polydopamine (PDA), osteoinduced drugs, chitosan, platelet-rich fibrin (PRF), enamel matrix derivatives (EMT), amelotin (AMTN), hyaluronic acid (HyA), tantalum (Ta), and copper were used as membrane coating materials.
