Missing Denture: CT-Negative Radiolucent Non‑clasp Resin Partial Denture Retained in the Stomach for 10 Days

Accidental denture ingestion in older adults can cause gastrointestinal injury and may be diagnostically challenging when the prosthesis is radiolucent. We report a 76-year-old man who accidentally swallowed a metal-free non-clasp resin partial denture (approximately 1 × 3 cm) while eating. After 10 days, he presented with persistent epigastric pain. Non-contrast chest-abdomen computed tomography (CT) with multiplanar reconstruction (axial, coronal, and sagittal images), interpreted by a board-certified radiologist, showed no definite intraluminal foreign body and no secondary signs of perforation or obstruction. Given the reliable ingestion history and persistent symptoms, urgent esophagogastroduodenoscopy revealed a darkened resin denture in the mid-gastric body along the greater curvature. The denture was retrieved using a retrieval net because net traction alone was insufficient to pass the laryngeal inlet; grasping forceps were used to complete transoral extraction without complications. This case shows that a negative non-contrast CT does not exclude retention of a radiolucent denture, and early endoscopic evaluation should be considered when clinical suspicion remains high.