Labial Vestibular Flap Closure of the Cleft Palate Is Advantageous for Maxillary Development.

: Using labial vestibular flap was performed to close the primary alveolar and hard palate cleft at the second stage of early 2-stage closure surgery for unilateral cleft lip and palate for minimizing the damage to the maxillary periosteum. We analyzed maxillary development to clarify the influence of cleft palate surgery. : Retrospective longitudinal study in 5 years after primary palatal closure. Institutional study Patients: Study subjects included 214 patients with nonsyndromic complete unilateral cleft lip and palate who were consecutively treated in our clinic. : We used a 3D dental model scanner to assess maxillary development in patients aged 3 months to 5 years after using either the conventional pushback method (PB) (51 cases) or 2-stage closure (Local palatal flap closure: LF [67 cases] and Labial vestibular flap closure: VF [96 cases]). : Comparing the measurement results, the major axis of maxilla, width, intercanine distance, and intermolar distance was significantly larger in the LF group compared to the PB group. After the age of 3, the cleft side of VF group had grown significantly to compare with LF group in width. It was also confirmed that the inserted labial mucosal flap itself grew. Enlargement of the labial mucosal flap was observed at all sites except the canine. : Good maxillary growth occurred in the following order: VF groups > LF group > PB group. Poor growth was correlated with the extent of periosteal damage during surgery and the degree of postoperative bone surface exposure.