ABSTRACT The main traumatic deformities of the extensor expansion (EE) are the boutonnière lesion (BL) and the mallet finger (MF). The classical BL is characterized by flexion deformity at the proximal interphalangeal joint, with hyperextension of the metacarpophalangeal and terminal interphalangeal joint, caused by the rupture or division of the central slip of the EE in a finger. The MF is defined as a deformity resulting from loss of EE continuity

This study describes an experimental animal model for the investigation of the vascularization of the rectus abdominis muscle and musculo-cutaneous flap on pig. We used four common breed pigs divided in two groups, one muscular and another musculo-cutaneous, each group contained four flaps, .The flaps were harvested, injected with contrast media and studied by radiological methods. The results consist in creating a protocol for harvesting, preparation