RESUMEN
<p><b>OBJECTIVE</b>To investigate the functional repair of secondary deformity of unilateral cleft lip.</p><p><b>METHODS</b>The nasal branch, nasolabial branch, and labial branch of orbicularis oris muscle were dissected and repositioned precisely to correct the secondary deformity of unilateral cleft lip.</p><p><b>RESULTS</b>96 patients were treated successfully with this method during Jan. 2005 to Oct. 2008. Good cosmetic and functional results were achieved. 85 cases were followed up for 3 months to 5 years with a satisfactory rate of 94.1% (80/85 cases).</p><p><b>CONCLUSIONS</b>The application of refined anatomy and precise reposition in orbicularis oris muscle is important to ensure therapeutic effect in patients with secondary deformity of unilateral cleft lip.</p>