Dental Sealants Waterloo
A sealant is a thin, plastic coating applied to the chewing surface of molars, premolars and any deep grooves (called pits and fissures) of teeth. More than 75% of dental decay begins in these deep grooves. Teeth with these conditions are hard to clean and are very susceptible to decay. A sealant protects the tooth by sealing deep grooves, creating a smooth, easy to clean surface.
Sealants can protect teeth from decay for many years, but need to be checked for wear and chipping at regular dental visits.
Reasons for Sealants:
- Children and teenagers – As soon as the six-year molars (the first permanent back teeth) appear or any time throughout the cavity prone years of 6-16.
- Adults – Tooth surfaces without decay that have deep grooves or depressions.
- Baby teeth – Occasionally done if teeth have deep grooves or depressions and child is cavity prone.
What Do Sealants Involve?
Sealants are easily applied by your Waterloo dentist or dental hygienist and the process takes only a couple of minutes per tooth.
The teeth to be sealed are thoroughly cleaned and then surrounded with cotton to keep the area dry. A special solution is applied to the enamel surface to help the sealant bond to the teeth. The teeth are then rinsed and dried. Sealant material is carefully painted onto the enamel surface to cover the deep grooves or depressions. Depending on the type of sealant used, the material will either harden automatically or with a special curing light.
Proper home care, a balanced diet, and regular dental visits will aid in the life of your new sealants.
What to Expect at a Sealant Appointment
Dental sealants are one of the simplest preventive procedures in dentistry. The whole visit usually takes ten to twenty minutes per tooth, no needles, no drilling, and no recovery time. Sealants are thin plastic coatings painted onto the chewing surfaces of the back teeth, where the grooves and pits are too narrow for a toothbrush bristle to reach. By sealing those grooves off from food and bacteria, the sealant blocks one of the main pathways through which cavities form on molars.
Your dentist or hygienist cleans the tooth surface thoroughly, then applies a mild etching gel for a few seconds to roughen the enamel microscopically so the sealant grips well. The gel is rinsed off and the tooth is dried. The sealant material is brushed onto the grooves as a liquid, then hardened with a blue curing light in under a minute. A quick check of the bite makes sure the sealant feels even, and the appointment is done.
Sealants work best on freshly erupted permanent molars in children and teens, when the grooves are still deep and the risk of decay is highest. Adults with cavity-prone teeth or deep groove anatomy can also benefit. The procedure is comfortable, requires no anaesthetic, and the patient can eat and drink normally right after.
Who Is a Good Candidate for Sealants
Sealants are not a one-size answer for every tooth, but they are very effective when applied in the right situations. Talk to us about sealants if any of these apply:
- A child or teen has freshly erupted six-year or twelve-year molars (the back permanent teeth)
- Deep grooves and pits are visible on the chewing surfaces of molars or premolars
- Past cavities have appeared on the biting surfaces despite good brushing
- Brushing technique is still being learned (younger children) or is consistently rushed
- A diet high in sweet or starchy snacks raises decay risk
- Visible signs of early decay show on the chewing surface but have not yet broken through the enamel — sealants can sometimes arrest these
- Family history shows a pattern of cavities on back teeth
- An adult has a tooth with deep, stainable grooves but no actual decay
Sealants are not appropriate for teeth that already have cavities, fillings, or extensive wear. Those are addressed with the right restorative treatment instead.
How Sealants Hold Up Over Time
A well-placed sealant typically lasts five to ten years, though wear varies with how hard the patient bites, what they eat, and how the sealant was originally bonded. Sealants gradually thin over time and may chip in spots. The good news is that a sealant can be touched up or replaced quickly and inexpensively as needed — much faster and easier than treating a cavity that would have formed in its absence.
Your dentist checks the condition of each sealant at every cleaning visit. If a sealant has worn down or partially come off, it is repaired or replaced during that visit, often without needing a separate appointment. Most patients find sealants are still serving them well into adulthood.
Care is simple: regular brushing and flossing as normal, no special routine needed. Sealants do not require dietary changes. Avoid chewing on hard objects like ice or pen caps, which can crack a sealant edge. Continued fluoride exposure (toothpaste, water, or in-office treatments) protects the rest of the tooth surface that sealants do not cover.
Cost and Insurance Coverage
Sealant cost per tooth is among the lowest of all dental procedures. Trillium follows the current Ontario Dental Association Suggested Fee Guide for sealant placement, and we give you the per-tooth cost up front so you know what to expect for one tooth or for all four molars in one visit.
Most private dental insurance plans for children and teens cover sealants on permanent molars, often at 100 percent under the preventive category. Coverage for adults varies more — some plans cover, some do not. CDCP includes sealants as a preventive service for eligible children. We confirm coverage before placement so there are no surprises.
Frequently Asked Questions
Do sealants hurt?
No. Sealant placement involves no drilling and no needles. The tooth is cleaned, conditioned, and painted with a thin layer of sealant material that hardens under a blue light. Most patients describe the experience as no different from a polishing during a cleaning visit.
Can adults get sealants too?
Yes, when the situation calls for it. Adults with deep, stainable grooves on healthy molars, cavity-prone histories, or specific risk factors can benefit. Sealants are most commonly placed in childhood and the teen years because that is when permanent molars first erupt and decay risk is highest.
What if there's already a small cavity?
Sealants are not used over an active cavity. Your dentist examines each tooth carefully before placement. If decay is detected, it is treated first with a filling and the surrounding healthy areas can still be sealed if appropriate.
Do sealants contain BPA?
Modern dental sealants use materials that meet Canadian safety standards. The trace amounts of any BPA-related compounds released during sealant placement are far below thresholds established by regulatory bodies. If you have concerns, we are happy to discuss the specific materials we use.
How will I know if a sealant has come off?
You may notice a small piece of plastic in your mouth, but more often you will not feel anything change. The dentist or hygienist checks every sealant visually at each cleaning visit and replaces or repairs any that have worn down or come off, before the underlying tooth has a chance to develop decay.
Are sealants a replacement for brushing?
No. Sealants protect only the chewing surfaces of the back teeth. The smooth surfaces (front, back, and sides of all teeth) and the spaces between teeth still depend on daily brushing and flossing. Sealants are an addition to good home care, not a substitute for it.