Fig. 2.

Clinical photographs showing the steps of the performed surgical procedure. a Teeth extraction. b The created two well-contained critical-sized horizontal ridge defects per jaw quadrant, each about 7-mm mesio-distally × 8-mm apico-coronally × 5-mm bucco-lingually. c Management of the study side with MPM composite and injection of part of the collected plasma over the formed MPM composite to form the MPM compact layer over it. d Defect covered with MPM compact layer. e Management of the control side with alloplast mixed with PRF cuts and serum exudates. f Defect covered with PRF membrane. g Collagen membrane placement to completely cover the defects on both sides. h The flap advancement to cover the membrane, suturing with simple interrupted sutures and reduction of the cusp tips of the teeth in the upper jaw opposite to the defect site