Abstract: Objective: To analyze the effect of β-tricalcium phosphate artificial bone (β-TCP) implantation and oral repair membrane covering on bone defect restoration after jaw cyst excision. Methods: 116 patients with jaw cyst in our hospital from July 2018 to September 2019 were selected and randomly divided into control group and observation group, with 58 cases in each group. The control group underwent curettage after cyst excision, however, the observation group was filled with β-TCP and covered with membrane after the curettage. The clinical efficacy, computed tomography (CT) value of bone defect area, and postoperative recovery of the lost function teeth were compared between two groups. Results: After the operation, the total effective rate of observation group was obviously higher than that of control group (P<0.05); at 3 months after operation, the CT values of the defect area in both groups were obviously higher than those before the operation (P<0.05); at 6 months after operation, the CT values of the defect area were obviously higher than those at 3 months after operation and before operation (P<0.05), and the recovery of the affected teeth in both groups was obviously better than that at 3 months after operation (P<0.05); at 12 months after the operation, the CT values of the defect area and the recovery of affected teeth in both groups were obviously higher and better than those at 3 and 6 months after operation and before operation (P<0.05); at 3, 6, and 12 months after operation, the CT values of bone defect area and the recovery of affected teeth in the observation group were obviously higher and better than those in the control group (P<0.05). Conclusion: The use of β-TCP combined with oral repair membrane can effectively promote osteogenesis and tooth recovery in patients with jaw cyst.

Key words: β-tricalcium phosphate artificialbone, oral repair membrane, jaw cyst, bone defect