Abstract: Objective To analyze peri-implant alveolar bone loss with radiography. Methods 38 implants were inserted in 27 cases. The peri-implant alveolar bone was observed and measured with intraoral radiography at time of insertion, functional loading, and 3, 6, 12 months after functional loading. Results The mean peri-implant alveolar bone loss was 0.35 mm immediately after functional loading, 0.57 mm, 0.67 mm,1.01 mm at 3,6,12 months later. There was not significant difference of bone loss between maxilla and mandible, neither of submerged and non-submerged implants. ITI implants performed significantly less bone loss than Replace Select within 3 months after functional loading (P<0.01). Conclusion Osseointegration will successfully be obtained on implants involved. The peri-implant alveolar bone loss with ITI is less than that with Replace Select. The bone loss is not different between submerged and non-submerged implants.

Key words: osseointegration, alveolar bone loss, implant