Objective To analyze the application effect of implant anchorage intrusion overerupted posterior teeth in implant restoration for elderly patients with opposing teeth loss and its effect on periodontal condition and quality of life. Methods A total of 80 elderly patients with opposing teeth loss admitted to our hospital from January 2023 to August 2024 were selected as the research subjects, and they were randomly divided into control group and observation group, with 40 patients in each group. The control group was restored with traditional implant method, and the observation group was restored with implant anchorage intrusion overerupted posterior teeth. The intrusion effect, periodontal condition, quality of life and treatment satisfaction were compared between the two groups. Results The intrusion volume of overerupted teeth in the observation group was lower than that in the control group (P<0.05), and there was no significant difference in the resorption volume of apical root between the two groups (P>0.05). The PD and mSBI in the observation group after treatment were lower than those in the control group (P<0.05). All the scores of quality of life in the observation group after treatment were higher than those in the control group (P<0.05). All the scores of the treatment satisfaction in the observation group were higher than those in the control group (P <0.05). Conclusion The application value of implant anchorage intrusion technique in implant restoration for elderly patients with opposing teeth lossis definite, and it can effectively intrude the overerupted posterior teeth, reduce the apical root resorption, improve the periodontal health, and effectively enhance the quality of life and treatment satisfaction of patients.