Fig 7. Digital radiographs of implants at the beginning of the plaque formation period in week 24 (A) and at the end of the study in week 46 (B).

Differences in crestal bone level are evident. 1. Uncoated zirconia abutment, 2. G3 glassy coated abutment, 3. ZnO35 coated abutment, 4. G1n-Ag coated abutment.