The Avulsed Tooth Clock: A 60-Minute IADT-Aligned Protocol for ER and Urgent Care
A child arrives in your emergency department with a permanent front tooth in a sandwich bag. The parents are frightened, the clock is running, and most emergency physicians have never reimplanted a tooth. That is the gap this protocol is built to close. Tooth avulsion is one of the few emergencies where the first 60 minutes genuinely decide the long term result, and where a confident clinician with no specialized dental training can change the outcome.
This is a working reference for emergency physicians, urgent care clinicians, EMS crews, and school nurses across the Salt Lake City area. It follows the International Association of Dental Traumatology (IADT) 2020 avulsion guidelines, so whatever you do in the first hour lines up with what the dentist does next.

Why the 60-minute window matters
An avulsed permanent tooth is not just a tooth. Clinging to its root surface are periodontal ligament (PDL) cells, and their survival is what lets a reimplanted tooth heal back into the bone normally. Those cells are fragile. They begin to die within minutes of dry exposure, and after roughly 60 minutes of total dry time they are considered non-viable regardless of how the tooth is stored afterward.
When PDL cells die, the body cannot rebuild a normal attachment. Instead the root fuses directly to bone and is slowly replaced by it, a process called replacement resorption, or ankylosis. It is progressive and largely irreversible. A separate problem, inflammatory resorption, is driven by a necrotic pulp and bacterial toxins; unlike ankylosis, it is preventable with timely root canal therapy. That is why two things protect the tooth independently: keeping PDL cells alive, and handing the case to a dentist fast enough for definitive endodontic care.
The single most useful fact you can capture on arrival is the extra-oral dry time. Time out of the mouth, time in a storage medium, and the type of medium together tell the dentist whether to expect favorable healing or to plan for managed ankylosis. Maturity matters too: closed-apex (mature) teeth will need root canal treatment, while open-apex (immature) teeth in younger patients may revascularize and are watched rather than treated immediately.
The IADT 2020 storage hierarchy
If a caller reaches you before they arrive, the storage medium is the highest-value instruction you can give. The IADT hierarchy, best to last resort, is straightforward:
- Cold milk. Widely available, close to the right osmolality, and forgiving. This is the realistic best choice for most families.
- Hank's Balanced Salt Solution (HBSS). The ideal medium, sold in tooth-preservation kits, though rarely on hand at home.
- The patient's own saliva. Tucked in the buccal vestibule between cheek and gums, only for a cooperative patient who will not swallow or aspirate it.
- Sterile saline. Acceptable for short periods and usually available in your department.
- Water. Last resort only. It is severely hypotonic and ruptures PDL cells, although it still beats letting the tooth air-dry on a counter.
The message for parents, coaches, and school staff is simple: never let the tooth dry out, never scrub it, and get it into milk on the way to care.
The field protocol your ER can run
For a permanent tooth within the viable window, reimplantation is a procedure you can perform. The IADT sequence is consistent across every source:
- Handle the tooth by the crown only. Never touch or wipe the root surface.
- If visibly contaminated, rinse gently with sterile saline. Do not scrub, curette, or disinfect the root, and do not remove tissue attached to it.
- Reposition any displaced socket bone and irrigate the socket with saline to clear clot debris.
- Replant the tooth slowly into its original socket with light digital pressure until it seats.
- Verify position clinically and, where available, radiographically.
- Have the patient bite gently on gauze to stabilize the tooth.
- Apply a passive, flexible splint for about 2 weeks. Extend toward 4 weeks if there is an associated alveolar fracture or if dry time exceeded 60 minutes.
A flexible splint can be improvised with thin stainless steel wire bonded with composite, nylon fishing line and composite, or a prefabricated titanium trauma splint. The goal is stability with slight physiologic movement, never rigid fixation.
Not sure whether to replant in the department or send the patient straight over? A 60-second call to our team gets you a real-time answer and a same-day slot. We would always rather talk it through with you first than have a tooth lost to hesitation.
Adjuncts that protect the result
A few low-effort steps meaningfully improve healing. Check and update tetanus status, especially when the injury involved soil or a dirty surface. Systemic antibiotics are recommended after replantation; amoxicillin or penicillin is a typical first choice, and tetracyclines such as doxycycline are generally avoided in younger children because they can permanently discolor developing teeth. A chlorhexidine 0.12% rinse twice daily reduces bacterial load at the site. Advise a soft diet for about 2 weeks and meticulous, gentle oral hygiene around the splint.
When not to replant
One contraindication is absolute: never replant an avulsed primary (baby) tooth, because it can damage the developing permanent tooth bud beneath it. Relative contraindications include severe untreatable caries or advanced periodontal disease in the avulsed tooth, a markedly uncooperative patient where the attempt is unsafe, and severe medical compromise or immunosuppression. When replantation is not appropriate, preserve the tooth in milk and arrange prompt dental evaluation anyway, since the dentist may still have options.
The same-day dental handoff
Your work buys the tooth time; the dentist makes it permanent. On handoff, the practice confirms or adjusts the splint and plans definitive care by apex maturity. For a closed-apex tooth, root canal therapy is planned deliberately, with pulp extirpation generally around 7 to 10 days after replantation and before the splint comes off, which heads off inflammatory resorption. Open-apex teeth are monitored for revascularization instead. A structured recall follows: roughly 2 weeks for splint removal, then 4 weeks, 3 months, 6 months, 1 year, and yearly thereafter. Skipped follow-up is independently linked to losing the tooth, so the handoff is not a formality; it is the rest of the treatment.
This is exactly where an emergency dental practice open 7 days a week earns its place in your referral pathway. Avulsions do not wait for Monday, and neither does the 7 to 10 day endodontic window.
Call us first, before the parents Google it
When an avulsed tooth comes through your doors, you do not have to manage it alone. Our team provides emergency dental care in Salt Lake City every day of the week, including evenings and weekends, and we welcome direct calls from ED and urgent care clinicians mid-case. Tell us the dry time, the storage medium, and the patient's age, and we will give you a clear next step and a same-day appointment. Save our number where your team can find it fast, because the best outcomes start with a quick call to an emergency dentist in Salt Lake City rather than a frantic search. Call us first, and we will take it from there.
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