fig1

Figure 1. A graphical illustration of the labio-mandibular flap raised from the peri-oral and lower lip areas, along the LMF and vermilion border, illustrated by "1". Note also the Y-V advancement of the oral commissure into the flap itself (illustrated as "2"). The presence of the orbicularis oris musculocutaneous perforator within the distal flap ensures its continued perfusion while the narrow cutaneous bridge at the oral commissure suffices for venous and lymphatic return