Objectives: Of 432 implants (174 patients) which had placed in department of periodontics of Chonnam National University Hospital, 204 implants which were connected with transmucosal abutment and had at least 2 consecutive periapical radiographs were investigated about distribution of implants and bony changes at mesial and distal sites, cumulative survival rates. Methods: The radiographs were scanned by flatbed scanner and digitalized, mesial and distal bone levels were measured using Image analyzer( Image Pro Plus, Media Cybernetics, USA) immediately after implant placement, 2nd surgery, 3 months, 6 months, 1 year, and every 1 year. Results: 1. Of 204 implants, 168(82.3%) were placed in molar region, and 121(59.3%) in mandible. 2. 15 implants failed and were removed. Of those, 9 showed mobility due to disintegration. 3. The amount of bone loss was little between 1st and 2nd surgery, greater bone loss appeared for 3 months after transmucosal abutment, and 0.86±0.92mm was lost for the first year. 4. After 1 year of prosthodontic treatment, annual bone loss was 0.1±0.68mm, and total bone loss was 0.90±0.80mm. 5. The cumulative survival rate was 94.10% for 7 years. 6. In systemic disease patients, the greater bone was lost than healthy patients. Conclusions: From this results, the bony change around the implants were greatest in 3 months after transmucosal abutment connection. The amount of crestal bone loss for follow up period was variable, and for the long term results there are needs for radiographs of regular interval.