First Impressions Dental
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Dr. Terry Trezek and his entire team have been practicing in the community since 2000. With offices in O'Fallon and Troy, MO, the primary goal of First Impressions Dental is to provide the highest standard of care possible for each patient that we treat. This standard refers not only to the health care provided, but also to the quality of service given to each patient.

Patients are extending a great deal of trust in us as professionals, so it is only fitting to return the favor by giving 110% to each patient that enters the practice. To be successful in our goal, here at First Impressions Dental, we must also educate the patient as to the best treatment modalities offered and methods to prevent further dental disease.
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Tina is one of our part time Hygienist. She is married and has a wonderful family. Tina is a travel enthusiasts which has taken her on many fun vacations full of culture and exploration. Barb graduated from the University of South Dakota with an Associate Degree in Applied Science and has been employed with First Impressions Dental since 2011 as a Dental Hygienist.
Our practice is family-oriented and child-friendly. In fact, 25% of our patient-base is comprised of children under the age of 18. We have designed our facility with your child's interests in mind and boast a dedicated children's play area. We didn't forget about our adult patients either, we also provide refreshments, free Wi-Fi internet services, and comfortable seating in a Zen-like atmosphere.
Dr. Trezek earned his Doctor of Dental Medicine degree from Southern Illinois University's School of Dental Medicine in the year 2000. He is a proud member of the Missouri Dental Association, American Dental Association, International Association of Orthodontics, International Congress of Implantologist, American Academy of Cranial Facial Pain and a certified Invisalign provider.
Dr. Trezek and his team in O'Fallon and Troy make every effort to provide not only excellent, but also affordable dental care. Finances shouldn't prevent you from having the perfect smile you deserve. We make payment as convenient as possible by accepting Cash, Check, Visa, Mastercard, Discover and American Express.
Thank you for choosing our office to care for your dental needs. New patients are always welcome at either of our convenient locations in O'Fallon or Troy, MO. We are delighted to welcome you to our dental family. Everyone at First Impressions Dental is committed to making your visit pleasant and stress-free, your comfort is our top priority!
Reviews (10)
Heather Harmeyer
Heather Harmeyer
Oct 07, 2021
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I cannot begin to say how lucky I was to find Dr. Trezek and his team. I recently moved to the area and visited a few other dentists. Dr. Trezek is clearly the best in the area. He is patient, extremely knowledgeable, reasonable, and makes visiting the dentist the most pain free experience. Very appreciative of him and his team!
Brandy Roos
Brandy Roos
Jul 05, 2021
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Shady billing. Please make sure you get an itemized receipt for your procedure .They will say you did not pay and turn over to collectors. I pulled up my bank statement with my payment and I will see them in court!
Ms. Tracy Calloway
Ms. Tracy Calloway
May 27, 2021
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The staff are very nice. They care about your well being as well as the cost of your options that you have for your care. Making sure that you get what you need as well as what you can afford. Would recommend to anyone.
C. B.
C. B.
Nov 01, 2020
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Couldn’t ask for a better dentist. He lives up to all of his great reviews. I finally found my family dentist and if you give him a chance I’m sure you would too. I highly recommend Dr Trezek, (especially for people that don’t like going to the dentist). Give him a try, you won’t be disappointed.
James Walker
James Walker
Sep 13, 2020
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I got there a half hour ahead of appt, the office people didn't input my info correctly and I had be pushed back. Saw the dentist, told him what tooth was hurting but he insisted he wanted to work on a totally different tooth that would cost me $4000 to "fix". I told him I was an over the Road Trucker so he gave me a prescription for opioids which I returned thinking seriously, do you want to destroy my career, and an antibiotic that gives you diarrhea, even the pharmacist said, WHY? I cancelled my next appt because nobody listens and why would I want to go to a dentist like that.. I would rather
Chad Rodgers
Chad Rodgers
Aug 26, 2020
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Let me start with its been 20+ years since I went to a dentist, at 28 yes I had a bad dentist hurt me and I have avoided dentist like the virus. Now almost 50 yrs old I don't have a choice but to find a dentist. I did lots of research, reading reviews looking for comfort and pain free. I choose First Impressions, they lived up to every review. No one shamed me, they were covid safe. No pain, they put together several options for treatment and throughly explained each one the +/- and the cost estimated with my insurance coverage. Even the price was way better than I imagined. So I now have 2 appointments
Patty Wieland
Patty Wieland
Jun 18, 2020
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Barb is the best! She always makes me as comfortable as possible even in this pandemic! Dr Trezek is also the best! He never rushes through the exam & makes sure if any issues are taken care of! Wish I would of found this dental office alot sooner than I did!
Whitney Jo
Whitney Jo
Jul 26, 2019
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First Impressions is awesome. The whole team is awesome and seems knowledgeable. I was referred to this office when my own dentist was out of town. I had incredible pain and within days developed cellulitis, my face was probably swollen 30% larger than normal on one side, and I was admitted to the hospital. Dr. Trecek was AWESOME through it all. He made me a priority and got me in fast. He is friendly and makes kind conversation. The staff seems to have good rapport and I couldn't say enough about how great they were. I had to go about five times in six months and I always had a good experience
Timothy Johnson
Timothy Johnson
Jul 17, 2019
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Dr Terry and his team were amazing. They were able to get me in for a routine check up in O’Fallon and then immediately back at this location for 4 wisdom teeth removal prior to my flight home in a few days. The entire procedure, including two fillings, took less time than my wait at the pharmacy for my prescription. I’d go back if I had a location closer to home.
Jerome
Jerome
May 15, 2019
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I think I received the most thorough cleaning I ever gotten and I'm pretty old. The tech really took the time to I'm sure give me the best cleaning I've ever had. This was my 1st cleaning here and I'm looking forward to many more.
Thank you again, Jerome.