Before revision: Different studies revealed a different predisposition for the presence of septa based on sinus region: Anterior: Ulm, et al., Krennmair et al.Krennmair G, et al.
After revision: Different studies reveal a different predisposition for the presence of septa based on sinus region: Anterior: Ulm, et al., Krennmair et al.Krennmair G, et al.