Pediatric Dentistry · single question
An 8-year-old has an avulsed permanent maxillary central incisor (open apex) brought in HBSS. If HBSS is unavailable, which is an acceptable alternative storage medium?
Show answer and explanation
Correct answer: A. Cold milk
- A. Correct. Cold milk is an excellent, widely available storage medium that preserves PDL cell viability (osmolality/pH).
- B. Tap water is hypotonic and lyses PDL cells — the worst choice.
- C. Dry storage rapidly kills PDL cells.
- D. Mouthwash is cytotoxic to PDL cells.
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