06/07/2025
These wedge-shaped grooves near the gumline are called abfraction lesions—a type of non-carious cervical lesion (NCCL). They're caused by tooth flexure from grinding (bruxism) or a misaligned bite, which creates microfractures in enamel and dentin. Over time, abrasive brushing or acidic exposure can worsen the damage. Even if painless, they weaken tooth structure, trap plaque, and may lead to sensitivity or fractures. Treatment involves correcting bite forces (e.g., night guard), gentle brushing, and possibly restoring the area with composite or glass ionomer. Early management preserves tooth health, prevents complications, and avoids more invasive treatments later.
