Pre- and Postoperative Long-Term Assessment of Sinus Floor Augmentation Site Using Cone Beam Computed Tomography

Introduction. Sinus lift operations are planned in atrophic maxillary residual alveolar bone. There is little evidence how the quality and quantity of residual bone influence the dimension of sinus lifts.

Aim of the Study. To evaluate relationship between amount of residual alveolar bone and sinus lift dimension.

Materials and Methods. 73 sinuses of 54 patients were included in to the study. Preoperative and postoperative cone beam computed tomography scan of sinus lift operation site was performed. The measurement of atrophic alveolar bone height, width and radiodensity in planned sinus lift area was done. Postoperatively sinus lift height, width and length were measured. The sinus volume difference from both scans was calculated. Amount of bone substitute materials used was registered.

Results. Residual alveolar bone mean height was 3.84 mm SD±2.28, width 7.15 mm SD±2.27, radiodensity 142.74 HU SD±155.38. Postoperatively mean sinus lift height was 15.81 mm SD±2.91, length 18.73 mm SD±5.21, width 12.70 mm SD±2.49. The mean sinus volume difference was 2422.70 mm3 SD± 3415.92. Mean amount of biomaterials used was 1.29 g SD±0.67.

Conclusions. The less bone radiodensity was found in alveolar bone with more dimensions. The less quantity of atrophic alveolar bone leads to increase size of sinus lift.