IADR Abstract Archives
Factors Affecting Dimensional Changes in the Maxillary Sinus Following Lateral Wall Augmentation
Objectives: To evaluate the variables affecting changes in the grafted site after lateral wall sinus augmentation using a composite autogenous/bovine-derived xenograft
Methods: Patients who underwent lateral wall sinus augmentation procedures were selected for this retrospective analysis provided that they met the following inclusion criteria: presence of three consecutive digital panoramic radiographs [taken pre-treatment (T0), immediately after lateral wall sinus augmentation (T1), and approximately 1 year postoperatively (T2)]. Dental implants were not inserted during this observation period. The use of composite grating material (1:9 ratio autogenous / xenogenic material). Panoramic radiographs were transferred into measurement software, and the following measurements were performed: (1) vertical distance from the alveolar crest to the height of the augmented material, (2) sagittal area of the grafted area, and (3) vertical distance from the alveolar crest to the roof of the maxillary sinus. All measurements were performed by one examiner (DR). Double measurements were performed in nine patients at T2, and the calculated Cronbach's alpha statistic was very high (0.96 - 0.98).
Results: Eighteen subjects aged 47 to 69 years (mean 62.72 ±6.1 years) were included in this analysis. Residual ridge vertical height ranges from 1.01 to 4.9 mm (mean 3.02 ± 1.4 mm). The overall area of the grafted material at the time of surgery was 468.3 ± 208 mm2 and 422.2 ± 193 mm2 1 year post-op, representing a mean loss of 46.07 mm2). A moderate positive correlation was found between baseline graft volume and changes in this volume over time (r=0.3913, p=0.05). Likewise, the vertical height of the graft at T1 (mean, 20.67 ± 4.5 mm) was slightly reduced at 1 year (mean, 19.35 ±4.9 mm). A weak non-significant correlation was observed between initial sinus sagittal area and the changes from T1 to T2 (p=0.2256, p=0.18). Finally, the association between the original graft vertical height and vertical changes were not statistically significant (r=-0.02, p= 0.46).
Conclusions: Minor dimensional changes of the graft material were observed 1 year following lateral wall sinus augmentation. Larger graft volume might exhibit greater dimensional reduction.
Methods: Patients who underwent lateral wall sinus augmentation procedures were selected for this retrospective analysis provided that they met the following inclusion criteria: presence of three consecutive digital panoramic radiographs [taken pre-treatment (T0), immediately after lateral wall sinus augmentation (T1), and approximately 1 year postoperatively (T2)]. Dental implants were not inserted during this observation period. The use of composite grating material (1:9 ratio autogenous / xenogenic material). Panoramic radiographs were transferred into measurement software, and the following measurements were performed: (1) vertical distance from the alveolar crest to the height of the augmented material, (2) sagittal area of the grafted area, and (3) vertical distance from the alveolar crest to the roof of the maxillary sinus. All measurements were performed by one examiner (DR). Double measurements were performed in nine patients at T2, and the calculated Cronbach's alpha statistic was very high (0.96 - 0.98).
Results: Eighteen subjects aged 47 to 69 years (mean 62.72 ±6.1 years) were included in this analysis. Residual ridge vertical height ranges from 1.01 to 4.9 mm (mean 3.02 ± 1.4 mm). The overall area of the grafted material at the time of surgery was 468.3 ± 208 mm2 and 422.2 ± 193 mm2 1 year post-op, representing a mean loss of 46.07 mm2). A moderate positive correlation was found between baseline graft volume and changes in this volume over time (r=0.3913, p=0.05). Likewise, the vertical height of the graft at T1 (mean, 20.67 ± 4.5 mm) was slightly reduced at 1 year (mean, 19.35 ±4.9 mm). A weak non-significant correlation was observed between initial sinus sagittal area and the changes from T1 to T2 (p=0.2256, p=0.18). Finally, the association between the original graft vertical height and vertical changes were not statistically significant (r=-0.02, p= 0.46).
Conclusions: Minor dimensional changes of the graft material were observed 1 year following lateral wall sinus augmentation. Larger graft volume might exhibit greater dimensional reduction.