목적: Sulcus vocalis is a groove formation at the free edges of the vocal folds. Previously we have reported the efficacy of treating sulcus vocalis with pulsed dye laser (PDL) and named the specific surgical procedure PDL glottoplasty. The aim of this study is to present the long term effects of PDL in the management of sulcus vocalis with special emphasis on the morphologic and voice outcomes. 방법:This study was conducted on 36 patients diagnosed with sulcus vocalis and treated by PDL glottoplasty between 2008 and 2013. Any patients with other associated laryngeal lesions and who have been followed up shorter than 12 months were excluded. Energy delivery was fixed at 0.75 Joules per pulse, and each vocal fold was administered 60 to 110 pulses (average 72.5 pulses) during each procedure. Aerodynamic, stroboscopic, and acoustic voice analyses results performed before and at least 12 months after the operation were compared. All patients received continuous voice therapy or singing therapy starting from 3 months after the operation. 결과:The mean age was 39.3 years (male 26, female 10) with 8 professional voice users. The initially pathologic vocal folds showed decreased stiffness, resolution of previous scar formation and improved mucosal wave properties after treatment, resulting in improved vibration and dysphonia. In the objective voice analysis, there was a general improvement in all indices 12 months following the PDL glottoplasty with significance in mean airflow rate, subglottic pressure, irregularity of amplitude, fundamental frequency, and voice handicap index score. 결론:PDL glottoplasty can be an effective and beneficial treatment for sulcus vocalis. Objective measurements of voice quality and normalization of vocal fold vibration and morphologic changes of scar formation improved after PDL treatment in most cases. Further studies on the basic fundamental molecular mechanisms underlying the mucosal changes following PDL treatment should be investigated in the future.