Abstract: PURPOSE: To evaluate the effects of bone-level implantation combined with orthodontics on periodontal health and implant stability in patients with dentition defect. METHODS: A total of 92 patients(92 teeth) with dentition defect admitted to the hospital from January 2020 to January 2023 were selected and divided into 2 groups by random number table method, with 46 cases in each group. All patients in the two groups were treated with bone-level implantation, and the experimental group was treated combined with orthodontics before implantation. The implant success rate 6 months post-surgery, along with the periodontal status before and 6 months after implantation [sulcus bleeding index (SBI), probing depth(PD), plaque index (PLI)], chewing function, bone resorption, implant stability quotient and incidence of complications (occlusal elevation, non-occlusal contact, food impaction and occlusal pain) were compared. RESULTS: The implantation success rate of the experimental group was significantly higher than that of the control group, SBI, PD and PLI after 6 months of implantation were significantly lower than those of the control group, and the surface myoelectric activity of temporal muscle, bilateral masseter muscle and implant stability coefficient at maximum occlusion were significantly higher than those of the control group(P<0.05). There was no significant difference in bone absorption between the two groups(P>0.05), and the complication rate of the experimental group was significantly lower than that of the control group(P<0.05). CONCLUSIONS: Bone-level implantation combined with orthodontics helps improve periodontal health and enhances implant stability in patients with dentition defect.

Key words: Bone-level implantation, Orthodontics, Dentition defect, Implant stability