Objective To explore the effect of oral implant restoration on dentition defect and its influence on language function and chewing function. Methods A total of 50 patients with dentition defect admitted to the Department of Stomatology of our hospital from February 2020 to March 2022 were selected as the research objects. They were divided into control group and observation group by random number table method, with 25 patients in each group. The control group was given routine restoration, and the observation group was given oral implant restoration. The clinical efficacy, language function, chewing function and complications of the two groups were compared. Results The total effective rate of treatment in the observation group was 96.00%, which was higher than 64.00% in the control group (P