Dental Hygiene & Prevention

Keep Your Mouth Looking & Feeling Great Before The Problems Begin

Serving Oshawa & Durham Region

Complete Dental Exams & Cleanings

We'll keep your teeth & gums extra-healthy with regularly-scheduled dental exams & cleanings.

Each regular exam includes a detailed teeth cleaning, in which we will clean, polish, and rinse your teeth to remove any tartar and plaque that have built up on the tooth’s surface.

Your regular exam will take about 45 minutes to 1 hour.

We also suggest visiting our office every six months to give yourself the chance to talk to the doctor about any questions you may have about your oral health.

Regular exams are offered by appointment only, so please contact our practice today to schedule your next dental exam and teeth cleaning.

Immediately after a cleaning, your teeth may be more sensitive than usual due to the removal of tartar and plaque that once shielded your teeth.

But, in most scenarios, this sensitivity will pass within a day or two and your mouth will feel amazing!

Dental Exams

During your exam, we will:

Our Premium Dental Hygiene Package covers you for 18 months and includes the following:

And all for just $498!

Dentists Durham Region No Benefits Dental Coverage

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Schedule A Day To Come-In For A One-Time Cleaning & X-Rays

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Gum Disease Treatments

Periodontitis Can Cause Gum Infections, Damage, Loose Teeth & Even Tooth Loss

Gum disease is an infection of the tissues that surround and support your teeth and is major cause of tooth loss in adults. Because gum disease is normally painless, you may not know you have it.

Also referred to as ‘periodontal disease’, gum disease is caused by plaque, the sticky film of bacteria that is constantly forming on our teeth.

The sooner you treat gum disease, the better.



The early stage of gum disease is called gingivitis.

We’ve all heard of it before and, if you have it, your gums may be red, swollen and will bleed easily while eating or  brushing your teeth.

When our gums are healthy, activities such as these should not make gums bleed.

The good news is, at this stage the disease is still reversible and can usually be eliminated by a thorough and professional cleaning at your dental office, followed by daily brushing and flossing.

If you think you might be experiencing some of these symptoms and would like to get it checked, simply reach out to us to schedule an appointment.



Advanced gum disease is called periodontitis.

Much worse than gingivitis, It can lead to the loss of tissue and bone that support the teeth and it may become more severe over time.

If it does, your teeth will feel loose and start moving around in your mouth.

This is the most common form of periodontitis in adults but can occur at any age.

It usually gets worse slowly, but there can also be periods of rapid progression.

If you are having problems like these, please contact us  to schedule an appointment right away.

Fluoride Treatments

Fluoride Treatments

We’ll help promote stronger teeth & fewer cavities with regularly scheduled fluoride treatments.

One key to good oral health is fluoride, a mineral that helps prevent cavities and can repair teeth in the very early, microscopic stages of the disease.

Fluoride can be obtained in two forms: topical and systemic.

Topical fluorides are applied directly to the tooth enamel and some examples include fluoride toothpastes and mouth rinses, as well as fluoride treatments in the dental office.

Professional fluoride treatments generally take just a few minutes and the fluoride may be in the form of a solution, gel, foam or varnish.

Typically, it is applied with a cotton swab or brush, or it is used as a rinse or placed in a tray that is held in the mouth for several minutes.

After the treatment, you may be asked not to rinse, eat or drink for at least 30 minutes to allow the teeth to absorb the fluoride and help repair microscopic carious areas.

Depending on your oral health status, fluoride treatments may be recommended every three, six or 12 months.

Your dentist also may recommend additional preventive measures if you are at a moderate or high risk of developing caries.

These measures may include over-the-counter or prescription therapeutic products such as fluoride mouthrinses, gels or antibacterial mouthrinses.

Dental Sealants

Dental Sealants

Preserve your child’s teeth with an added layer of protection.

Dental sealants are plastic coatings that are usually placed on the chewing surface of the permanent back teeth, or the molars and premolars.

These sealants help protect the back teeth from decay.

The chewing surfaces of the molar and premolar teeth have grooves — “fissures” — that make them vulnerable to decay.

These fissures can be deep, are difficult to clean, and can be more narrow than a single bristle of a toothbrush.

Plaque builds up in these areas, and the acid from bacteria in the plaque attacks the enamel and cavities can develop.

Fluoride helps prevent decay and helps protect all the surfaces of the teeth, while dental sealants provide extra protection for the grooved and pitted areas by providing a smooth surface covering over the fissured area.

The first dental sealant to be placed is usually on the fissure of the first permanent molar tooth, once the chewing surface of the tooth has erupted completely beyond the gum.

This tooth grows in behind the baby teeth.

If the chewing surfaces of these teeth are sealed, the dental sealant will help protect the tooth.

Except for the wisdom teeth, which come through much later, the molars and premolars continue to erupt until eleven-thirteen years of age and the chewing surfaces of these teeth can be sealed after they have erupted beyond the gum.

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RDC Dental Care Dr. Peter Riordan

“Routine maintenance is the best way to keep your teeth and gums in their best shape. Let us help you correct any issues you might be having and we’ll set up a simple plan for you to follow that will keep the problems away for good.”

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Riordan Dental Care Oshawa Ontario

Driving Directions:

Located in Oshawa, Ontario, we are on the east side of Simcoe Street North, just south of Beatrice Street East and north of Sunset Drive.

If you are driving south on Simcoe, continue past Beatrice Street and Liz’s No Frills (you’ll see it on your right side). We are just past that plaza, on the left (east) side.

If you are driving north on Simcoe Street, go past the Long & McQuade Musical Instruments store (on your left) and the Petro Canada gas station (right side).

The next street on your left will be Sunset Drive (where the Shell gas station is) and we are just past that intersection, on the right (east) side.


Free parking is available on the south (right) side of the building.

Public Transit:

You can take the Simcoe Street Northbound or Southbound bus.

Both directions have stops at Sunset Drive, just south of the clinic.

The Simcoe Southbound Bus Stop ID is: 715

The Simcoe Northbound Bus Stop ID is: 686

Please visit the Durham Region Transit website’s schedule page for routes, fares and times.


The clinic is fully accessible.


You can call the clinic during regular business hours or leave a message if we aren’t able to take your call.

Our Service Areas:

Oshawa Neighbourhoods: