Treatment of External Cervical Resorption via Surgical Crown Lengthening and Concomitant Placement of a Resin-Modified Glass-Ionomer Restoration: A Case Series with 1- to 4-Year Follow-up.

External cervical resorption is a disease entity with an idiopathic etiology by which osteoclastic invasion cavitates teeth near the cementoenamel junction. The lesion, if left untreated, has the potential to progress and compromise tooth maintainability. Treatment of these lesions requires access (often surgical), removal of the affected tissue, and placement of a restorative material. This case series documents 10 external cervical resorption lesions that were treated by surgical crown lengthening with concurrent placement of a resin-modified glass-ionomer restoration and followed up for a period ranging from July 2020 to July 2024. This case series offers evidence that external cervical resorption can be treated with a high expectancy of tooth survival. Longer-term follow-ups are needed to see if this treatment remains stable and predictable.