1. Radiographic assessment of marginal bone loss
bone loss
CREST, BONE LOSS
The implant was utilized as a reference for the measurement of marginal bone loss (MBL) from the cross-sectional view by adjusting panoramic long axis in its center and bisecting it (showing the buccolingual dimensions).At the crest of the buccal plate of bone and ending at the apical level of the implant, a line was drawn directly parallel to the implant, and its height was measured in millimeters immediately, 6 months and 18 months postoperative. The measurement of the bone level at implant placement was considered as baseline. Radiographic MBL was calculated as the difference between the reading at 6 and 18 months postoperative and the baseline value.