A 19-year-old patient in India experienced a complication when a metal orthodontic wire fractured during the consumption of a firm traditional food. The device—a transpalatal arch spanning his upper palate—broke into two segments, which he swallowed without realizing it. Within 20 minutes, he reported brief throat discomfort before the symptoms resolved. Subsequent X-rays confirmed both fragments had passed into his stomach, with no signs of airway obstruction.
The transpalatal arch is a common orthodontic appliance fixed to the upper molars using bands, with the wire bent to guide tooth alignment. After ingestion, the patient’s condition remained stable, allowing clinicians at the Armed Forces Medical College in Pune to proceed with non-emergency removal. The larger segment was retrieved using an endoscope, while the smaller piece was monitored via follow-up imaging until it passed naturally.
Research indicates orthodontic appliances contribute to a significant portion of swallowed foreign bodies. Studies show dental foreign bodies account for between 3.6% and 27.7% of all ingested or inhaled objects, with 85.19% involving swallowing rather than inhalation. While most cases resolve without intervention, sharp metal objects in the stomach or intestines require prompt retrieval to prevent complications.
Read Also: Lung mass in nonsmoker reveals rare birth defect
A 2003 case report from Egypt documented a similar incident involving a broken transpalatal arch. The authors emphasized that such events could become life-threatening if left undetected. A more recent 2022 review identified 19 published cases of swallowed orthodontic components, including wires, molar bands, and expansion keys, reinforcing the need for vigilance.
Metal vs. plastic: X-ray visibility saves lives
Metal appliances offer a diagnostic advantage over plastic alternatives. Unlike clear aligners, which may remain undetected until complications arise, a broken wire is easily visible on X-rays. In a 2024 report, a 31-year-old woman in Shanghai ingested a cracked aligner fragment that required adjusted CT settings for detection.
The Turkish Journal of Orthodontics has recommended precautions to reduce risks, including securing appliances with dental floss during adjustments and using radiopaque materials for better visibility on scans. These measures help clinicians locate lost parts more quickly, though they do not eliminate the risk entirely.
Read Also: Four States Sue to Block Medicaid Work Mandate
Patients who notice missing orthodontic components should seek medical evaluation immediately, even without symptoms. Urgent care is particularly necessary for breathing difficulties, chest pain, or abdominal discomfort. The transpalatal arch in the Pune case had been inserted into small sheaths welded onto bands on the patient’s upper first molars, with the wire bent to maintain precise tension. Even minor shifts, such as those caused by biting into dense food, can cause the appliance to snap.
Protocols for safe removal of swallowed metal fragments
Clinicians at the Armed Forces Medical College in Pune followed a protocol prioritizing immediate retrieval of sharp metal objects, even when patients remain asymptomatic. The gastroenterology team first cleared residual food from the stomach using a tube, and the larger fragment was then located and retrieved with an endoscope. The smaller segment, too small for endoscopic removal, was tracked via serial X-rays until it exited the body.
A 2022 literature review in the Journal of Orthodontic Science identified 19 cases of swallowed orthodontic components, with 85% occurring outside clinical settings. This suggests many patients underestimate the severity until symptoms appear. A 2003 Egyptian case report highlighted that undetected swallowed wires could lead to intestinal perforation or obstruction. The same study found 71% of patients had fixed appliances, indicating removable devices may carry lower risks, though underreporting likely obscures the true frequency.
