Does Foraminal Enlargement Increase Postoperative Pain After Root Canal Treatment?

The researchers also found that excluding two influential studies reduced heterogeneity without changing the direction of the pooled effect.

In other words, the overall findings continued to favour the non-enlargement approach for postoperative pain, even after this additional analysis.

The apical third presents a particular challenge during root canal treatment. Clinicians aim to reduce the microbial load while maintaining control over instrumentation and limiting unwanted effects on the periapical tissues. Foraminal enlargement is one approach intended to improve cleaning in this region, but its clinical benefits must be considered alongside potential postoperative symptoms.

The findings raise a practical consideration: if foraminal enlargement is being considered, the possibility of increased postoperative pain should form part of the clinical decision. This is particularly relevant when discussing treatment expectations with patients.

However, the review does not establish that foraminal enlargement should never be performed. It assessed postoperative pain, not whether the technique improves microbial reduction, periapical healing or long-term endodontic success. The authors also noted that the observed increase in pain appeared to be transient, occurring during the first week after treatment.

Importantly, the review focused on asymptomatic necrotic permanent teeth treated in a single visit. Its results should not automatically be extrapolated to every endodontic diagnosis or clinical situation.

Further well-designed clinical trials are needed to clarify whether foraminal enlargement offers meaningful benefits in terms of disinfection and healing, and how these potential benefits compare with the risk of postoperative symptoms.

More studies are needed to focus on whether doing so offers enough benefit to justify the additional postoperative discomfort that may follow.