INTRODUCTIONrnIn oral implantology, the quality and volume of alveolar bone in the implant area affect implant position, primary stability and soft tissue shape recovery, and other critical factors related to satisfactory implantation restoration.1 Generally, the alveolar bone will suffer secondary absorption and atrophy after tooth loss, the width and height of the alveolar ridge will decrease, and become insufficient for implantation over time.2 Therefore, the reconstruc-tion of alveolar bone in the implant area is a key point in oral implantology. There are many clinical methods for alveolar bone defect recovery, including guided bone regeneration technique (GBR), onlay bone grafting, bone extrusion technique, bone splitting technique, and distraction osteogenesis. Due to its simple operation, low technical sensitivity, osteogenic stability, and multidirectional osteogenesis ability, GBR is one of the most currently used technique to repair alveolar bone defects.