Abstract: PURPOSE: To explore the clinical value of ultrasound-assisted parotid flap sialolithotomy in the treatment of deep parotid duct stones. METHODS: From January 2019 to June 2020, five patients with deep parotid duct stones in the Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, were collected. Preoperative CT scan showed that the stones were located in the intraparenchymal duct, which was at the anterior edge of the masseter muscle. The patient underwent parotid flap stone extraction under general anesthesia. During operation, a small S-shaped incision was designed behind the ear with the aid of B-ultrasound. The marginal mandibular branch of the facial nerve was dissected to expose the duct in the gland where the stone was located. Then, the wall of the duct wall was cut to remove the stone, and the duct was sutured tightly. Follow-up data were collected at 1 week, 3 months, and 12 months after operation. RESULTS: All stones were successfully removed. One patient developed symptoms of parotid duct obstruction after operation, which improved after washing and dilatation treatment. No facial nerve injury, salivary fistula, infection and other complications occurred. The clinical symptoms before surgery were completely relieved at 12-month follow-up, and the curative effect was satisfactory. CONCLUSIONS: Ultrasound-assisted parotid flap sialolithotomy for deep parotid duct stones has a high success rate, good curative effect, and is worth of wide application.

Key words: Sialolithiasis, Parotid, Ultrasound-assisted, Sialolithotomy