Abstract: Objective　 Sausage technique was applied in patients with knife-edge ridge to evaluate the effect of horizontal bone increment and provide clinical reference. Methods Twelve patients with residual alveolar bone width less than 5mm in the edentulous area at the Department of Implant, Hangzhou stomatological hospital were included, containing 18 horizontal bone increment sites. Planting sites’ CBCT data were collected, including preoperative data, data immediately after operation and 9 months of postoperative. It was fitted by 6D Dental Planning software. The width of alveolar bone was measured at vertical distance 1 mm, 3 mm, 5 mm and 7 mm from the midpoint of alveolar crest. SPSS25.0 software was used for statistical analysis. Result At 1mm, 3mm, 5mm and 7mm sections, the average increase of bone mass at 9 months postoperative compared with preoperative respectively was 2.26mm, 3.13mm, 3.17mm and 2.81 mm. Bone mass at 9 months of postoperative was compared with preoperative bone mass by One-way analysis of variance (Bonferroni). The bone mass of 1mm, 3mm, 5mm and 7mm sections at 9 months of postoperative was significantly increased compared with preoperative, and there was statistical significance (F=36.83；P<0.05)；(F=76.13；P<0.05)；(F=57.29；P<0.05)；(F=24.10；P<0.05). Conclusion Sausage technique can effectively improve horizontal bone defect of the knife-edge ridge.

Key words: knife-edge ridge, horizontal bone increment, sausage technique, cone beam computed tomography, alveolar bone width