The autogenous DDM granules prepared at the chairside after extractions could act as an excellent readily available alternative to bone graft material in GBR, even for implantation of severe periodontitis cases.

Rationale:Foreign bodies are rarely found in the submandibular gland and the Wharton duct, due to their physiological and anatomical features.Patient concerns:A 23-year-old man was referred to Foshan Stomatology Hospital in July 2016, with pain and intermittent swelling in the right submandibular area.Diagnoses:Physical examination revealed enlarged, indurated, and painful swelling in the right submandibular area, with a normal oral cavity. No abscess or fistula was detected. Radiography and computed tomography (CT) indicated a 1.7 cm radiopaque mass in the Wharton duct, close to the submandibular gland.Interventions:Submandibular sialadenectomy was performed under general anesthesia. Upon exploration of the fully dissected submandibular gland, a 2.0 cm long barb-like metallic body was found in the Wharton duct.Outcomes:The patient had an uneventful recovery during a 6-months follow-up.Lessons:Foreign bodies in the Wharton's duct can be detected by imaging techniques, such as radiography and CT, and successfully treated by submandibular sialadenectomy.