What is a PRR?

PRR stands for Preventive Resin Restoration.  Thanks to modern technology and material research, it is one of the most conservative, amazing, and popular treatments offered which will extend the life of a healthy tooth.

A PRR takes advantage of the strength and bonding properties of composite with the added benefit of a sealant.  It is often done for children who are more prone to cavities during adolescence, but it is also frequently performed for adults who want to avoid cavities or treat early cavities and preserve the health of their teeth.

Why are PRRs Necessary?

The natural development process of permanent teeth results in grooves and pits on their chewing surface.  These pits and grooves can be so small and deep that brushing them becomes impossible.

Unlike a brush bristle however, bacteria and dissolved food particles easily fit inside these grooves.  Once decay-causing bacteria get into these grooves it becomes impossible to clean them out.  That's when cavities start.

What's Involved with a PRR?

When a tooth with deep, narrow grooves begins to show signs of decay, the groove is first cleaned out.  No anesthetic is necessary because the procedure is done in the surface enamel layer, not into the dentin like a standard filling.

Once the groove is cleaned out, it is filled and bonded with composite and then sealed.  This way, maximum tooth structure is preserved and the grooves are repaired, preventing cavity formation and extending the healthy life of a tooth.

What's the Difference Between a Filling and a PRR?

A PRR is an optional preventive measure to save a tooth before it is damaged by a cavity.  But, a filling is needed once a cavity has already formed.

A PRR generally does not need anesthetic because dentin is not involved.  (Dentin is the inner layer of a tooth that is sensitive.)  A filling does require anesthetic because dentin is involved.

Some insurance companies will not cover PRRs because there is no visible cavity for them to justify treatment for.  What they are forgetting though, is that if a PRR is not done early, then a cavity will form and damage the tooth.

What is a Sealant?

A sealant is a thin, plastic coating applied and bonded to the chewing surfaces of teeth to create a barrier against food and bacteria that cause decay.  Sealants are also used to finalize PRRs.

How Long Does a Sealant Last?

The lifespan of a sealant varies widely based on the shape of the grooves and the chewing pressures the sealant receives.  Sealants can often last several years.

Sometimes a sealant needs to be renewed after a few years.  Other times the outer portion of a sealant may break off or wear away leaving the inner portion in place (in the grooves) to protect the tooth.  In that situation, the sealant most likely does not need to be replaced and will continue to function for many years.