Risk score algorithm for treatment of persistent apical periodontitis

Area of Science:

• Endodontics
• Dental Radiology
• Biostatistics

Background:

• Persistent apical periodontitis after root canal treatment may not always require intervention.
• Differentiating between lesions requiring treatment and those compatible with health is crucial for efficient patient care.

Purpose of the Study:

• To develop a Deterioration Risk Score (DRS) for persistent apical periodontitis.
• To identify lesions that are likely to be compatible with health and do not need further intervention.

Main Methods:

• A cross-sectional study analyzed 228 periapical lesions in 182 patients from 2003-2008.
• Risk factors were screened against outcomes (improved, unchanged, deteriorated) using multivariate probit regression.
• A 5-level DRS was constructed based on predicted probabilities of deterioration.

Main Results:

• Most lesions (55.7%) improved, while 30.3% deteriorated over time.
• Significant predictors of deterioration included time since treatment, current pain, sinus tract presence, and lesion size.
• The DRS categorizes risk from very low (<15) to very high (>40).

Conclusions:

• The developed DRS can assist clinicians in identifying persistent apical periodontitis at low risk for deterioration.
• Implementing the DRS may reduce overtreatment and improve the efficiency of disease management.
• Further validation of the DRS is recommended for widespread clinical adoption.