Abstract: PURPOSE: To investigate the clinical effect and related influencing factors of implant and implant-natural tooth in dental restoration. METHODS: A total of 67 edentulous patients receiving dental implantation in Shangrao People's Hospital from May 2016 to June 2017 were enrolled, including 34 cases of implant-natural tooth supported restoration (combined group) and 33 cases of implant restoration (single group). During the 3-year follow-up, the repair effect and bone resorption of the two groups were evaluated. The general data of patients were collected, then the influencing factors of implant failure were screened. Statistical analysis was performed using SPSS 20.0 software package. RESULTS: The success rate of dental restoration was 93.65% in combined group, and 95.08% in simple implant group, with no significant difference between the two groups (P>0.05). The bone resorption of the alveolar ridge in combined group was significantly higher than that in simple implant group 1 and half years after operation (P<0.05). The proportion of female, maxillary posterior area, dental pulp disease, grade IV bone mineral density loss, diabetes mellitus, smoking history, implant diameter>4.5 mm, length>12 mm, periodontal probe depth>3 mm, and sulcus bleeding index≥2 were significantly higher in implant failure group than in implant success group (P<0.05). Bone mineral density loss, diabetes mellitus, smoking history, sulcus bleeding index≥2 and periodontal probe depth>3 mm were the risk factors of implant failure(P<0.05). CONCLUSIONS: Both implant and implant-natural tooth are effective in dental restoration, and implant-natural tooth restoration has good short-term efficacy, while bone mineral density loss, diabetes mellitus, smoking history, sulcus bleeding index≥2 and periodontal probe depth>3mm are the risk factors of implant failure.

Key words: Implant, Implant-natural tooth, Restoration effect, Influencing factor