{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,20]],"date-time":"2026-06-20T20:52:02Z","timestamp":1781988722129,"version":"3.54.5"},"reference-count":28,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,6,8]],"date-time":"2026-06-08T00:00:00Z","timestamp":1780876800000},"content-version":"vor","delay-in-days":158,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Dentistry"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>This report highlights the unique occurrence of secondary trauma to a tooth previously treated with regenerative endodontic therapy (RET) and the successful outcome following this secondary injury. A 10\u2010year\u2010old girl sustained initial trauma to her maxillary central incisors. Tooth 11 sustained a complicated crown fracture and was treated with pulpotomy, which promoted complete root closure. Tooth 21 initially presented with an uncomplicated crown fracture; however, subsequent radiographic examinations revealed external inflammatory root resorption (EIRR) and periapical periodontitis. RET was performed to halt EIRR, and follow\u2010up radiographs confirmed complete healing, indicated by a well\u2010defined border around the resorption surface and the absence of apical radiolucency. Seven months after the initial trauma, the patient experienced a second injury, resulting in the concussion of both Teeth 11 and 21. No intervention was needed, but the teeth were closely monitored clinically. At the 26\u2010month follow\u2010up, both teeth remained asymptomatic with no pathological findings. This case demonstrates that RET effectively arrests EIRR in a short timeframe and maintains tooth stability even after subsequent mild trauma.<\/jats:p>","DOI":"10.1155\/crid\/5571369","type":"journal-article","created":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T06:18:35Z","timestamp":1780985915000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Regenerative Endodontics Maintained Arrest of External Inflammatory Root Resorption After Secondary Concussion Injury: A Case 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