What medium should a loose tooth be placed in to preserve it for reimplantation?

Storage Medium for Avulsed Teeth

If you cannot immediately replant an avulsed permanent tooth, place it in Hank's Balanced Salt Solution, oral rehydration salt solution, propolis, or rice water (if preprepared), or wrap it in cling film—and if none of these are available, use whole milk as your backup option. 1

Optimal Storage Solutions (In Order of Preference)

The 2024 AHA/American Red Cross Guidelines provide the most current evidence-based hierarchy for tooth storage 1:

First-Line Options (Best Cell Viability):

• Hank's Balanced Salt Solution (HBSS) - Contains balanced salts rich in bicarbonate ions that maintain periodontal ligament cell viability
• Oral rehydration salt solutions - Balanced glucose and electrolytes (can be purchased or made at home)
• Propolis - Resinous mixture from honey bees; research shows superior cell viability after 1 and 3 hours compared to milk 2
• Rice water (if preprepared)
• Cling film wrap - Prevents dehydration

Second-Line Options (If Above Unavailable):

• Whole milk (cow's milk) - Widely available, maintains cell viability better than saline or water 2, 1
• Saliva - Patient can place tooth in buccal vestibule or drool into container 3

Third-Line Options (Limited Availability):

• Probiotic solutions
• Egg white 2
• Almond milk 1

NEVER Use:

• Tap water - Causes osmotic lysis of root fibroblasts and significantly reduces cell viability 1, 3

Critical Time Factors

Time is the enemy here. The likelihood of successful reimplantation decreases rapidly with every minute the tooth remains out of the socket, particularly if the periodontal ligament dies 1. Immediate replantation (within 5 minutes) is ideal 4. Even 10 minutes of desiccation can affect outcomes 4.

Practical Algorithm for Real-World Settings

1. First 10 seconds: Briefly rinse visible debris from the tooth (hold by crown only, never touch the root) 1

2. Attempt immediate replantation if possible - have patient bite on cloth to hold in position 3

3. If replantation not possible, use this decision tree:

   • At home/school: Use whole milk (most readily available) 2, 1
   • Have oral rehydration salts?: Mix and use (superior to milk) 1
   • Have cling film?: Wrap tooth to prevent dehydration 1
   • Nothing available?: Patient stores in buccal vestibule (between cheek and gum) using own saliva 3

4. Seek dental care immediately - bring tooth if not replanted 1

Common Pitfalls to Avoid

• Don't scrub or handle the root - The periodontal ligament fibroblasts are fragile and essential for reattachment 3
• Don't store in saline - Despite seeming logical, saline shows no benefit over milk and is inferior to preferred solutions 2
• Don't delay seeking care - Storage medium aids survival but doesn't replace the need for immediate professional intervention 2
• Don't replant primary (baby) teeth - Only permanent teeth should be replanted 3

Evidence Quality Note

The evidence base consists primarily of very-low-quality studies (downgraded for risk of bias, indirectness, and imprecision) 2. Most research measures cell viability in extracted teeth rather than actual tooth survival after replantation. However, the 2024 guidelines 1 represent the most recent consensus, superseding the 2015 recommendations 2 with updated evidence on oral rehydration solutions and cling film as viable options.

Bottom line for clinical practice: Milk remains the most practical first-line option due to universal availability, but oral rehydration solutions and cling film now provide evidence-based alternatives when available 1.