4. Implant apico-coronal position. Step 6. The remaining defects augmentation based on the proposed scheme. Flapless surgery will be applied consequently GBR application place will be inside the socket. The remaining defects and dehiscences after implant placement will be filled up, using two types of bone graft materials: Group I - natural bovine bone grafting material + resorbable natural soft tissue membrane and Group II - processed human allograft + resorbable natural soft tissue membrane. In future we will call Group II control group. Resorbable membrane should be condensed on bone graft without pressure and fixed by provisional crown. Conventional medicament treatment including Chlorhexidine 0.2% oral rinses twice daily for 2 weeks will be applied.