Pediatric Dentistry · single question
What is the BEST storage medium for an avulsed tooth?
Show answer and explanation
Correct answer: E. HBSS (Hank's Balanced Salt Solution)
✓ E) HBSS (Hank's Balanced Salt Solution) is the BEST storage medium.
Storage media ranked best to worst for maintaining PDL cell viability: (1) HBSS — designed to maintain cell physiology, osmolality and pH ideal; (2) Milk — readily available, pH ~6.8, iso-osmotic, low bacterial contamination; (3) Saline; (4) Saliva/buccal vestibule; (5) Tap water — hypotonic, damages PDL cells; (6) Dry storage — worst, PDL cells die within minutes.
✗ Milk is correct when HBSS is not available (common exam scenario). NEVER dry storage or tap water.
Storage media ranked best to worst for maintaining PDL cell viability: (1) HBSS — designed to maintain cell physiology, osmolality and pH ideal; (2) Milk — readily available, pH ~6.8, iso-osmotic, low bacterial contamination; (3) Saline; (4) Saliva/buccal vestibule; (5) Tap water — hypotonic, damages PDL cells; (6) Dry storage — worst, PDL cells die within minutes.
✗ Milk is correct when HBSS is not available (common exam scenario). NEVER dry storage or tap water.
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