[Application of single-layer forearm flap in the repair of perforating defect of palate].

To evaluate the feasibility and clinical efficacy of a single-layer radial forearm free flap （RFFF） for through-and-through palatal defects. The single-layer forearm flap was used to repair 6 cases of perforating palatal defect due to oral malignant tumor. Preoperative Allen test and ultrasound doppler examination were used to judge the forearm vessels. Patients were followed up to evaluate their chewing, swallowing, speech function, surgical outcomes and quality of life. All flaps survived completely （100.0%）. At 6 months all patients resumed normal oral intake without nasal regurgitation; speech was intelligible with mild-to-moderate hypernasality. Overall satisfaction with appearance and function was high. The single-layer forearm flap is a safe and reliable method for perforating palatal defect repair.