Resin Infiltration

Resin infiltration is a conservative treatment approach designed to halt the progression of early, non-cavitated enamel caries without the need for traditional drilling and filling. The procedure involves etching the surface of the affected enamel with hydrochloric acid to open the pores of the lesion, drying the area, and then applying a specially formulated low-viscosity resin that is drawn into the demineralized enamel through capillary action. Once light-cured, the resin effectively seals the lesion from the inside, blocking the pathways that acids and bacteria use to advance the decay process.

On the billing side, resin infiltration occupies a unique space in the CDT code set. It is reported under code D2990, which specifically covers resin infiltration of an incipient smooth surface lesion. Dental billing teams should be aware that not all payers recognize this code or provide reimbursement for it, particularly if the plan categorizes the procedure as experimental or elective. Pre-authorization and benefits verification are important steps before treatment to avoid claim denials and patient billing disputes.

For practices looking to grow their preventive and minimally invasive service lines, resin infiltration offers a meaningful revenue opportunity. It fills a gap where the traditional approach would be to simply "watch" the early lesion at recall appointments, generating no procedural revenue. By offering this treatment, practices can intervene at an earlier stage, deliver better clinical outcomes for patients, and capture a billable procedure that might otherwise be lost. Proper clinical documentation, including radiographic evidence and intraoral photographs showing the extent of the lesion, strengthens the claim and supports medical necessity if the payer requires justification.