Of Weerda 1980 1990

This flap is incised in three layers (Fig. 6.29a). The inferior labial artery and vein are dissected laterally in the cheek, then the mucosa is divided. The facial nerve branches are dissected and preserved. The three-layer skin-muscle-mucosal flap is then slid into the upper lip defect on its vascular pedicle, and the secondary wound is closed by mobilizing the surrounding skin (Fig. 6.29b, c). If part of the upper lip remains, the flap is incised downward at the commissure, portions of the upper lip mucosa are advanced medially, and the flap mucosa is flattened out to form the lateral mucosa of the upper lip(s). If cheek mobilization is not sufficient to close the secondary defect, Burow's triangles are excised to facilitate the closure (Fig. 6.29b).

Gillies Fan Flap Gillies Fan Flap

Fig. 6.28 Fan flap (Gillies 1976).

a The flap contains the orbicularis oris muscle. It is dissected bluntly to preserve the superior and inferior labial vessels (see Fig. 6.29). b The completed repair (see text).

Fig. 6.28 Fan flap (Gillies 1976).

a The flap contains the orbicularis oris muscle. It is dissected bluntly to preserve the superior and inferior labial vessels (see Fig. 6.29). b The completed repair (see text).

Gillies Fan Flap

Fig. 6.29 Neurovascular myocutaneous island flap of Weerda (1981, 1990; see Fig. 6.17).

a The flap can be cut in two layers (with mobilization of the cheek mucosa) or three layers, preserving its neurovascular pedicle.

A = superior labial artery V = vein N = facial nerve b The flap is advanced into the upper lip defect, and Burow's triangles are excised. c The completed repair

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