Central OKC

3104 N.W. 23rd Street
Oklahoma City, OK 73107
(405) 463-9986
Ortho: (405) 679-2460

Monday – Thursday 8:00am – 5:00pm
Friday 8:00am – 4:00pm
Saturday 8:00am – 2:00pm


As the oldest and original location, in operation since 1978, the 23rd Street Dental Depot has a rich and unique history. The office became a staple of the historic Linwood neighborhood after its founding by Dr. Glenn Ashmore, a Baylor College of Dentistry graduate and former member of the United States Navy Dental Corps.

Dental Depot’s presence in the Linwood community has been one of mutual benefits. Many beautification efforts in the form of new lamp posts, benches, and seasonal landscaping of road medians have been a direct result of the office’s presence and community outreach. These efforts have resulted in accolades by the OKC Beautiful organization, a Keep America Beautiful affiliate. The practice’s central location has also been instrumental in keeping the company involved with several Oklahoma City community activities, such as the Stockyard Stampede Parade (formerly Cowboy Christmas Parade), Classen Ten Penn Community Festival, OK Kids Korral, and various other community events and organizations.

This location currently features 24 individual, private operatories that harkens back to the private train cars one might enjoy along a cross-continental railway ride. Each operatory is filled with state-of-the-art dental equipment to ensure maximum comfort and care.

The 23rd Street office was also the very first location to host full orthodontic treatment. Keeping true to its family-operated traditions, Dr. Cody Dunnington, daughter of Dental Depot founder Dr. Glenn Ashmore, brought her orthodontic talents to the practice in 2010.

Check us out on Yelp and Google Plus.


Dr. Gregory Spielmann
General Dentist

Dr. Spielmann is a graduate of The University of Oklahoma College of Dentistry, and has been with Dental Depot since 2007. If you recognize Dr. Spielmann’s face, it just might be because he was once a TV meteorologist.
“My favorite thing about dentistry is being able to take something broken and turn it into beautiful, pain free work.”

Dr. Omar Rasheed
General Dentist

Dr. Rasheed is a graduate of Arizona State University and the University of Oklahoma College of Dentistry. He enjoys skiing, BBQs, roller coasters, fantasy football, and spending time with his wife and their two sets of twin girls.

“My favorite thing (about dentistry) is that it’s so fun. I get to use so many tools and materials to fix teeth. I love getting up in the morning and providing dentistry to those who need it. I get people out of pain, give them a better smile, and do my best to just make them happier.”

Dr. Joseph Sebourn
General Dentist

Dr. Sebourn is a graduate of Ohio State University. When not practicing dentistry, he can be found spending time with his wonderful family.
“Dentistry gives me the satisfaction of seeing the positive changes we can have in people’s lives.”

Dr. Winn Ashmore
General Dentist

Dr. Winn received his undergraduate from Oklahoma State University and his graduate degree at the OU College of Dentistry. Dr. Winn has been practicing dentistry for over 25 years.

Dr. Glenn Ashmore
General Dentist

Dr. Glenn founded Dental Depot in 1978, early on during his dentistry career. He continues to see patients and serve as Dental Depot’s Chief Executive Officer. The Depot is truly a family affair for Dr. Glenn. His wife, Arlene is a registered hygienist who decorates the interiors of the Depots, and both his children, Casey and Cody, are practicing dentists. Dr. Glenn is very active and proud to say that he can still water ski!
“I love coming into the office. Every day I’m in the office is another opportunity to save tooth lives.”

Dr. Mark McCollough


When visiting our office, your comfort is our top priority. At Dental Depot we treat our patients in modern facilities using state of the art technology and procedures. It is our goal to make sure you feel informed about your dental health. For more information on dental procedures provided at The Dental Depot of Central Oklahoma City, feel free to check out our patient videos.

In addition to performing comprehensive exams, we provide the following services and procedures:

General Dentistry

From visiting our practice twice a year for cleanings and checkups to preventive treatments and restorations, our team of dedicated doctors has your entire family’s oral health covered. Learn More ›

Crowns and Bridges

Our restorative dentistry services help keep our patients’ teeth healthy. Dental crowns and bridges are custom restorations that restore appearance and protect damaged teeth. Learn More ›


Orthodontic treatment is an important aspect of enjoying vibrant oral health. Along with the visual benefits of having straight teeth, orthodontics can improve oral health and oral function. Learn More ›


Tooth extraction is a common dental service involving removing an entire tooth from the mouth, including its roots. Wisdom tooth removal is an example of this type of procedure. Learn More ›


Brighten your smile, brighten your world

At Dental Depot, we want to make sure you get the care you need no matter your financial situation. We offer a variety of options that fit your lifestyle!


We accept most major insurance.  Your treatment coordinator will discuss your dental coverage with you in detail.

Payment plans

We care about your dental health!  Ask us about a payment plan option.

Care Credit

Care Credit is a flexible financing program endorsed by the American Dental Association that allows patients to make monthly payments on health care expenses not covered by insurance including co-payments, deductibles and cosmetic procedures.  It’s easy to apply online at www.carecredit.com.

We know that dealing with insurance and different payment options can be confusing, that is why your treatment coordinator will walk you through your individual treatment plan and help you understand how we can assist you every step of the way.

New Patient Forms

Save time and complete our new patient forms prior to your appointment.


Dental Appointment

Ortho Appointment

  • Select up to 3 appointment dates in order of preference