This study evaluates effect of anterior component separation and posterior component separation and transversus abdominis muscle release methods for treatment of midline ventral hernias.

The anterior component separation technique requires an extensive subcutaneous flap elevation, incision of the external oblique aponeurosis, and incision of the posterior rectus sheath.

The posterior component separation technique utilized the retromuscular space, accessed by incising the posterior rectus sheath and dissecting the posterior sheath between the internal oblique and transversus abdominis muscles. Transversus abdominis muscle release dissected the posterior sheath back to the transversus abdominal muscle and accessed the space between muscle and trasversalis fascia.

Inclusion Criteria:

• subject has midline ventral hernia
• patient's approval to participate in the study

Exclusion Criteria:

• strangulated hernia
• patient's preference for either operative technique
• patient's refusal to participate in the study