Dieffenbach Method.—The flap is cut very much like that advised by Lisfranc, being wider only at its upper extremity, as shown in [Fig. 327].
He advocates removing the remains of the old nose, almost circumscribing the nose, as shown in the illustration, except for the deep linear incision at the base of the nose on a level with the oval fissure, leaving a bridge of skin at either angle into which the square or septal part of the superior frontal flap is affixed.
The flap is made so that the right oblique line lies an inch above that of the left, the latter incision running into the angle formed at the root of the old nose caused by the ablation.
Fig. 327.—Dieffenbach Method.
Von Ammon Method.—The flap is cut at its superior border, similar to that of Keegan, but made in the perpendicular; the point of beginning, at the end of the right eyebrow, lies about an inch above the end of the incision of the opposite side, but in line with it ([Fig. 328]). The same method of removing the remains of the old nose advocated by Dieffenbach is followed as well as the lobial incision to receive the septal section.
The shape of this flap permits of bringing the secondary wound on the forehead more readily than where square exsections are resorted to.
Fig. 328.—Von Ammon Method.