A preventive resin restoration (PRR) is a conservative dental treatment that removes the earliest decay from a pit or groove in a back tooth and seals the area with tooth-colored resin — stopping a cavity before it fully forms. At Lucas Elite Dental Studio, we offer PRRs as part of our preventive dental care because preserving your natural tooth structure is always the better outcome.
What Is a Preventive Resin Restoration?
A PRR sits somewhere between a dental sealant and a traditional composite filling. It can be an excellent solution for teeth with early signs of decay, as well as for premolars and molars with deep grooves and pits on their chewing surfaces that trap bacteria and food debris.
Instead of waiting for a full cavity to develop, we remove only the decayed tooth structure, clean the area, and seal it with a tooth-colored resin material. PRRs are minimally invasive, keeping more of your natural tooth structure intact while also offering the longevity of traditional dental fillings.
You may also hear a PRR called a “conservative resin restoration” or simply “PRR” — in dentistry, all three refer to the same minimally invasive procedure.
PRR vs. Sealant vs. Filling: What Is the Difference?
This is the question we hear most often, and the distinction comes down to one thing: how much decay is already present.
Dental Sealant — no decay yet
A sealant is a thin protective coating painted over the grooves of a healthy back tooth. Nothing is removed, because there is nothing to remove. A sealant is purely preventive, and it is the right choice when the tooth is sound but the grooves are deep enough to be at risk.
Preventive Resin Restoration — earliest decay
A PRR is the middle ground. When decay has started but is still confined to the enamel of a pit or groove, a sealant alone is not enough — sealing over active decay does not address what is already there. With a PRR, we remove that small area of decay first, restore it with composite resin, and then seal the surrounding grooves. You get the repair and the protection in one visit.
Composite Filling — established cavity
Once decay has progressed deeper into the tooth, a full composite filling is needed. More tooth structure has to be removed, and the restoration is correspondingly larger. This is exactly the outcome a timely PRR is meant to avoid.
Put simply: a sealant protects, a PRR intercepts, and a filling repairs. Dr. Hajiyani will recommend whichever matches what she actually finds on the tooth.
Who Is a Candidate for Preventive Resin Restoration?
PRRs work especially well for patients who have deep grooves and fissures on the chewing surfaces of their back teeth. These crevices trap food debris, providing harmful bacteria with the ideal environment to feast and flourish. Children and teens are common candidates for PRR, but adults who are prone to developing cavities can also benefit.
If Dr. Hajiyani sees signs of early-stage decay or high-risk areas during your twice-yearly dental exam, she may recommend a PRR as part of your overall preventive dental care plan. Her goal is to keep a cavity from fully developing or progressing whenever possible, preventing the need for more invasive treatment down the road.
What Is the Preventive Resin Restoration Procedure?
The PRR process does not require anesthetic shots in most cases. Most patients are in and out in under an hour. The following is a look at what you can expect:
- Examination and Diagnosis: We will start by evaluating the affected tooth using high-resolution digital imaging tools to identify early decay or vulnerable grooves and crevices.
- Minimal Preparation: We will remove only the affected or at-risk enamel, which will allow us to preserve as much of your healthy tooth structure as possible.
- Resin Placement: We will fill and seal the area with a tooth-colored composite resin material, coating the pits and grooves to prevent the decay from progressing.
- Sealant Application: In many cases, we will apply a protective sealant layer over the resin to further shield the tooth from future decay.
There is no downtime afterward. You can eat and drink normally as soon as you leave, and the tooth is fully functional right away.
How Long Does a Preventive Resin Restoration Last?
A well-placed PRR can last many years — comparable to a small composite filling in the same tooth. Longevity depends on a few things we will talk through with you:
- Oral hygiene: consistent brushing and flossing protects the margins where the resin meets the tooth.
- Bite forces: heavy grinding or clenching wears any restoration faster. If you grind, we may recommend a nightguard.
- Diet: frequent sugary or acidic foods keep the surrounding enamel under attack.
- Regular checkups: at each visit we check the restoration and catch wear early, while a small repair is still all that is needed.
What Does a PRR Cost, and Is It Covered by Insurance?
A preventive resin restoration typically costs less than a full composite filling on the same tooth, because it is a smaller, more conservative procedure. The exact fee depends on the tooth and the extent of the decay, so we will always review it with you before treatment begins. Our team will also verify your benefits in advance — see insurance and financing for the plans we work with, or our membership plan if you do not have dental insurance.
The 2026 ADA coding change for PRRs
If you are comparing older insurance paperwork or other dental websites, you may run into a code that no longer exists. Through the end of 2025, a preventive resin restoration on a permanent tooth was reported under ADA code D1352 (“preventive resin restoration in a moderate to high caries risk patient — permanent tooth”).
Effective January 1, 2026, the ADA deleted D1352. The procedure is now reported under D2391 (“resin-based composite — one surface, posterior”), which was revised at the same time: the wording that had limited it to decay reaching into dentin was removed, so it now covers a one-surface posterior composite regardless of how deep the lesion is. The ADA’s rationale was straightforward — the procedure is performed the same way either way, and a single code causes less confusion. You can read the ADA’s own summary of the deleted CDT codes for 2026.
For patients, nothing about the treatment itself has changed — only the code used to bill it. If a website or benefits document still references D1352, it simply has not been updated.
Preventive Resin Restorations Near Me in Lucas, TX
At Lucas Elite Dental Studio, we pride ourselves on offering personalized preventive services, including preventive resin restorations, to keep your smile at its best. PRR is all about halting tooth decay before it progresses and becomes a cavity, safeguarding your smile. Ready to learn more about our conservative smile solutions? We invite you to schedule your consultation today by calling us at (972) 905-0786 or booking an appointment online.
Preventive Resin Restoration FAQs
What does PRR mean in dentistry?
PRR stands for Preventive Resin Restoration, a conservative treatment that removes early tooth decay and seals the area with tooth-colored resin before a full cavity can form.
Is a preventive resin restoration painful?
Most PRRs do not require anesthetic, since only the earliest, shallow signs of decay are removed. Patients typically describe the procedure as quick and comfortable, often completed in under an hour.
How long does a PRR last?
A well-placed preventive resin restoration can last for many years with good oral hygiene and regular dental checkups, similar to the longevity of a traditional composite filling.
What is the ADA code for a preventive resin restoration?
D1352 was the code through 2025, but the ADA deleted it effective January 1, 2026. Preventive resin restorations are now reported under the revised code D2391, resin-based composite — one surface, posterior.
Is a PRR covered by dental insurance?
Coverage varies by plan. Our team is happy to help you understand your benefits and any out-of-pocket costs during your visit.
