IADR Abstract Archives
Reaction of Schneiderian Membrane to Sinus Augmentation: A Retrospective Study
Objectives: To investigate the effect of maxillary sinus floor elevation via lateral approach on the thickness of the Schneiderian membrane
Methods: This retrospective pilot study included computed tomography (CT) scans of 16 maxillary sinuses obtained from the medical records of 12 patients that were referred to maxillary sinus augmentation procedures. CT scans were performed before sinus augmentation and 6 months later (before dental implant placement). Patients that were enrolled in the study were not suffering from acute or chronic sinusitis. The surgical procedure was performed according to lateral wall sinus augmentation protocol and included separation of the Schneiderian membrane from the sinus walls, engraftment of the space with xenograft and protection of the graft with two collagen membranes inside and outside the sinus. Post operative medication included a prescription of antibiotics, corticosteroids and analgetics. A total of 32 preoperative and postoperative CT scans were analyzed. The membrane thickness and the height of the graft were measured on the pre and post operative CT scan (using image J software). t-test analysis was used to compare the thickness of the membrane before and after sinus augmentation. Pearson correlation test was used to analyze the correlation between graft height, pre and post operative membrane thickness.
Results: Pre and post operative measurements of Schneiderian membrane thickness revealed a significant increase in the membrane thickness following the surgical procedure. Pre operative membrane thickness was 1.56 ± 0.96mm, while post operative thickness was 3.34 ± 1.66mm, p=0.0024. The mean height of the graft was 12.73 ± 3.42 mm. No significant correlation was found between the initial membrane thickness, the post operative membrane thickness and the height of the graft.
Conclusions: Sinus floor elevation via lateral approach using a bovine bone graft and a collagen membrane may increase the thickness of the Schneiderian membrane.
Methods: This retrospective pilot study included computed tomography (CT) scans of 16 maxillary sinuses obtained from the medical records of 12 patients that were referred to maxillary sinus augmentation procedures. CT scans were performed before sinus augmentation and 6 months later (before dental implant placement). Patients that were enrolled in the study were not suffering from acute or chronic sinusitis. The surgical procedure was performed according to lateral wall sinus augmentation protocol and included separation of the Schneiderian membrane from the sinus walls, engraftment of the space with xenograft and protection of the graft with two collagen membranes inside and outside the sinus. Post operative medication included a prescription of antibiotics, corticosteroids and analgetics. A total of 32 preoperative and postoperative CT scans were analyzed. The membrane thickness and the height of the graft were measured on the pre and post operative CT scan (using image J software). t-test analysis was used to compare the thickness of the membrane before and after sinus augmentation. Pearson correlation test was used to analyze the correlation between graft height, pre and post operative membrane thickness.
Results: Pre and post operative measurements of Schneiderian membrane thickness revealed a significant increase in the membrane thickness following the surgical procedure. Pre operative membrane thickness was 1.56 ± 0.96mm, while post operative thickness was 3.34 ± 1.66mm, p=0.0024. The mean height of the graft was 12.73 ± 3.42 mm. No significant correlation was found between the initial membrane thickness, the post operative membrane thickness and the height of the graft.
Conclusions: Sinus floor elevation via lateral approach using a bovine bone graft and a collagen membrane may increase the thickness of the Schneiderian membrane.