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Beautiful, New Dental Office Modern Touches & Cutting-Edge Technology


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Two Arlington Heights dentists in dental office hallway

Dental Education & Prevention is at the Heart of Our Dental Office


Sure, we are here to help replace a missing tooth, enhance your smile or get you out of pain – fast. However, this is not our primary goal. In fact, our philosophy is just the opposite. Our top priority is to be an advocate near you. We want to help you learn how to properly care for your teeth and gums, so dental problems are prevented. Whether you have major dental issues or a perfect smile, you can count on a nearby dentist in Arlington Heights and team to answer all your questions and to build a healthy dose of education into every visit.

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Family Friendly Dentistry Makes it Possible for Everyone to Smile


Since 1966, the dentists and team at Costello & DeHart Dental Excellence have been proud to serve the Arlington Heights community. From coaching Little League to visiting schools with free, educational programs, we go above and beyond to help our friends and neighbors smile. Our patients routinely comment that they have never been treated better – anywhere – and Dr. Ernie and Dr. DeHart look forward to carrying on the family tradition of exceptional dental care for the next 50 years in Arlington Heights.

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Nominate a Veteran for a Smile Makeover badge

Nominate a Veteran For a Smile Makeover


Our practice is thankful to be in a position where we can give back to patients. Each year, we nominate a few veterans and help them regain their confidence and get their smile back. We believe that these individuals deserve quality care and excellent craftsmanship, just like every other patient and we are proud to serve those who have served us. If you know of any deserving men or women who have bravely served our country and would like to change their smile please let us know!

Dentistry with Affordability & Convenience in Mind Dental Care - Always with a Personal Touch


As with everything we do, Costello & DeHart Dental Excellence makes getting and understanding the cost of the highest quality restorative, preventive, cosmetic, and children’s dentistry simple and predictable. If dental insurance is influencing your decisions, we will work with you and your plan to maximize your benefits. If you do not have dental insurance, our in-house dental program makes exceptional dentistry affordable for you and everyone around you. Regardless of your situation, our team takes the time to help you understand all aspects of your care and ensure financial concerns do not stand between you and the smile of your dreams.

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Comprehensive Dentistry Under One Roof

Costello & DeHart Dental Excellence prides itself on being able to provide many different services in one convenient office. Whether you’re looking for Invisalign to make your teeth straighter, a cosmetic dentist in Arlington Heights to bring your smile back to life, restorative dentistry to make it easy to chew food again, or simply a dentist who caters to your youngest family members, Costello & DeHart Dental Excellence is happy to be your dental home. Getting all your dental care done in your area without traveling all over town has never been easier!

Getting to Our Office in Arlington Heights

Is it time for your next dental appointment? Finding our office is easier than you’d think. Located in the heart of Arlington Heights, you can find our office near the Walgreens on N Arlington Heights Road. We’re also right across the street from the Thomas Middle School and North Arlington Pediatrics. From all of us Costello & DeHart Dental Excellence, we can’t wait to be your family’s home for dental care!

Frequently Asked Questions, Answered!

We’re always here to help. So, if you have a question pertaining to your oral health – even if it seems small or silly – don’t hesitate to give us a call. With that said, we know that getting on the phone isn’t always convenient. That’s why we’ve dedicated this next section to answering FAQs!

What level of education is required to be a dentist?

After high school, the aspiring dentist needs to earn their undergraduate degree (typically in a major that’s heavy in math and science). From there, they must apply and be accepted to one of only 67 accredited dental schools in the U.S. In order to earn their Doctor of Dental Medicine (DMD) or a Doctor of Dental Sciences (DDS), they need to undergo three years of rigorous in-classroom and hands-on training. Although this already adds up to 6+ years of studies, their education is far from over. That’s because they need to complete continuing education each year in order to maintain their license.

How do I get emergency dental care?

The answer really depends on one important question: are you experiencing any potentially life-threatening symptoms, like difficulty breathing? If so, then you need to seek medical attention at the ER. If you aren’t, and you reside in or around Arlington Heights, then your first call should be to our office. Over the phone, we can provide you with detailed instructions on how to handle your dental injury until you arrive at our office for treatment.

How much does a dental checkup & cleaning cost in Arlington Heights?

We need a little more information to provide you with an accurate answer. For example, if you have dental insurance or our in-office plan, then you may not pay anything out-of-pocket! So, if you’re interested in getting an estimate of the cost, it’s best to get in touch with our team directly. That way, we can ask you a few questions to learn more about your dental needs and determine the price you can expect to pay.

What do you do if you can't afford a dentist?

If you’re concerned that the price of the preventive, restorative, or cosmetic dental care you’re interested in won’t fit into your budget, don’t hesitate to ask our team about the financial solutions we offer. As we touched on in the previous section, we welcome dental insurance and have our own in-house plan that offers patients immediate savings. This allows us to work with patients with all kinds of budgets!

How can I make a same-day appointment with a dentist?

If you want to visit our Arlington Heights dentist before the end of the day, we recommend calling us ASAP. Over the phone, we can learn more about the treatment you’re interested in and take a look at our calendar to see if we can see you the very same day. We do our absolute best to see patients who have sustained a serious dental injury right away.