⚠️ Clinical Calculators

Dry Socket Risk Calculator

Calculate post-extraction alveolar osteitis risk using validated risk factors. Returns a percentage risk estimate and tailored post-operative instructions for high-risk patients.

Validated Risk Factors OCP Interaction Post-Op Instructions Smoking Impact PDF Export
Dry Socket Risk Calculator
Alveolar Osteitis Risk Assessment · Evidence-based
Extraction Details
Patient Risk Factors
Previous dry socket historyPrior alveolar osteitis significantly increases recurrence risk
Current smokerSmoking impairs clot formation and increases risk 3-4x
Oral contraceptive pill (OCP) useOestrogen increases fibrinolytic activity - schedule extractions day 23-28 of cycle if possible
Poor oral hygiene / active periodontal diseaseHigher bacterial load increases infection risk
Pre-existing pericoronitis or infection at siteActive infection at extraction site increases alveolar osteitis risk
Diabetes (poorly controlled, HbA1c >7%)Impaired healing response and higher infection risk
Corticosteroids or immunosuppressant medicationImpaired healing and increased infection susceptibility
High-concentration vasoconstrictor used (≥1:50,000 epi)Prolonged local ischaemia may delay clot organisation

⚠️ Dry Socket Risk Results

0%LowModerateHigh100%
Estimated Risk
0%
Low risk
Risk Category
-
vs 2-5% baseline
Key Risk Factors
-
Identified
Post-Operative Instructions
Disclaimer: Risk estimates are based on published odds ratios from Blum 1992, Noroozi et al. 2009, and Nusair & Younis 2007. For guidance only. Actual dry socket incidence depends on operator skill, socket irrigation, and patient compliance with post-op instructions.

Dry socket: what clinicians actually need to know

Alveolar osteitis affects 2-5% of routine extractions and up to 30% of mandibular third molar extractions. It's the most common post-extraction complication and one of the most preventable - if you identify high-risk patients before the extraction and modify your approach accordingly.

The two biggest modifiable risk factors are smoking and oral contraceptive use. Smoking reduces blood supply, disrupts clot formation, and the negative pressure of inhaling physically dislodges the clot. OCP users have elevated oestrogen that increases fibrinolytic activity, breaking down the clot before it organises. For OCP patients, scheduling the extraction on day 23-28 of the cycle (the lowest oestrogen phase) reduces risk significantly.

For post-extraction management, pair this calculator with our Healing Time Estimator for patient-facing recovery guidance. If a patient develops dry socket, our Pain Level Tracker helps them monitor and document their pain for follow-up appointments.

Frequently Asked Questions

Ask the patient to stop smoking for at least 48 hours before and 72 hours after extraction. That's the minimum. Extended cessation through the full healing period (7-10 days) is better. Pack the socket with a medicated dressing (Alvogyl or similar) prophylactically in very high-risk cases. Chlorhexidine mouthwash starting the day before extraction reduces the bacterial load. Some evidence supports placement of oxidised cellulose or collagen plugs in the socket at time of extraction for patients with 2+ risk factors.
Dry socket presents 2-4 days post-extraction when the patient reports that pain is getting worse rather than better. The classic presentation is severe throbbing pain, an empty-looking socket with exposed bone, and a distinctive foul odour. Initial post-extraction pain that improves then worsens on day 2-4 is the tell. Treatment is irrigation and medicated dressing placement - not antibiotics alone, which don't treat the exposed bone.

Related Tools