Which chemical is used in chemical matrixectomy and is considered the least painful option?

Which chemical is used in chemical matrixectomy and is considered the least painful option?

• A. Phenol
• B. Formalin
• C. Trichloroacetic acid
• D. Sodium hypochlorite

Answer: (A)

Phenol is used in chemical matrixectomy to destroy the nail matrix after partial nail removal, preventing regrowth of the nail portion that causes ingrown nails. It’s considered the least painful option because, when applied with a brief, controlled contact time (commonly around a few minutes) and then thoroughly rinsed, it achieves reliable matrix destruction with minimal surrounding tissue trauma. This efficiency often translates to shorter procedure time and less postoperative discomfort compared with other caustic agents. Formalin, trichloroacetic acid, and sodium hypochlorite are more irritating and tend to cause more inflammation and longer healing, which can lead to more pain after the procedure. Proper technique with phenol—including adequate irrigation and protection of surrounding skin—keeps pain and complications to a minimum while providing durable results.

Phenol is used in chemical matrixectomy to destroy the nail matrix after partial nail removal, preventing regrowth of the nail portion that causes ingrown nails. It’s considered the least painful option because, when applied with a brief, controlled contact time (commonly around a few minutes) and then thoroughly rinsed, it achieves reliable matrix destruction with minimal surrounding tissue trauma. This efficiency often translates to shorter procedure time and less postoperative discomfort compared with other caustic agents.

Formalin, trichloroacetic acid, and sodium hypochlorite are more irritating and tend to cause more inflammation and longer healing, which can lead to more pain after the procedure. Proper technique with phenol—including adequate irrigation and protection of surrounding skin—keeps pain and complications to a minimum while providing durable results.