Frontal Sinus Dissection (Cadaver)

1. Positioning and Anatomic Landmark Identification

2. Draf I

1. Anterior Ethmoidectomy
2. Dissect Agger Nasi
3. Identify Frontal Sinus

3. Draf II-A "Uncapping the Egg"

1. Remove Superior Edge of Agger Nasi
2. Ensure Identification of Frontal Sinus

4. Draf II-B

1. Cut Down Vertical Lamella
2. Enlarge Frontal Sinusotomy
3. Connect Frontal Sinus and Supraorbital Ethmoid

5. Draf III

1. Drilling Frontal Sinusotomy
2. Superior Anterior Septectomy