The oblique margins C, B, C are thus brought together vertically and sutured in the median line. The mucous membrane is brought from within outward and stitched to the skin margin.
The operation leaves two triangular wounds, which are to be healed by granulation. The result of the rotation and apposition of the flaps is shown in [Fig. 230].
Fig. 228. Fig. 229. Fig. 230.
Buchanan Method.
Syme Method.—Syme removes the affected area in triangular fashion, and from the apex of the wounds carries two curved and sweeping incisions downward from the anterior chin and beneath, terminating at the angles of the jaw (see [Fig. 231]).
These two large flaps are dissected from their attachment to the jaw and are slid upward until the sides of the triangular wound are raised to a horizontal line corresponding to the superior border of the lower lip, when the flaps are sutured vertically upon the anterior chin and to the triangular island of undisturbed tissue underneath the chin, as shown in [Fig. 232].
The advantage of this operation is that no secondary wounds are left to granulate, the whole healing by primary union.
Fig. 231. Fig. 232.