Horizontally augmentation of a deficient lower posterior ridge (knife edge) using a combination of anorganic bovine bone matrix (DBBM) with autogenous bone and native collagen membrane. 60 years old male missing teeth 35,36 and 37 for more than 20 years. CBCT scan showed good height but only 3 mms width contraindicating implant placement. Procedure included full thickness flap, isolation of mental foramen, cortical perforation for angiogenesis, autogenous bone scraped from external oblique ridge combined with DBBM (Bio-Oss®) 1:1 ratio. Stabilization of bone graft was performed using a porcine natural collagen membrane (Bio-Gide®) with bone tacks and flaps released and closed with Cytoplast® suture. Nine months after bone regeneration, a new CBCT scan showed a horizontal bone gain of 6 mms for a total of 9 mms width. The treatment of horizontally deficient alveolar ridges with the GBR technique using autogenous bone mixed with ABBM and a natural collagen resorbable barrier membrane can be regarded as succesful. Schlagwörter: sausage technique, bone regeneration, collagen membrane, xenograft