Plano Family and Cosmetic Dentist

Welcome to the Office of Our Plano Dentist

At Preston Park Dental our mission is to create and maintain beautiful smiles that last a lifetime! This is why we offer the latest in dental technology: digital, laser and cadcam technology. Plano dentist, Dr. Diana O'Quinn can provide the care you need.


Please take a look atour site to learn more about Dr. Diana O'Quinn and our practice to see how we can be an integral part of your dental care. We know that the first step towards a beautiful smile begins with selecting a dentist that you can trust. Don't hesitate to give us a call if you have any questions, or if you would like to schedule an appointment.


Whether you desire a routine checkup, a porcelain veneer, bonded veneer, crown in a single office visit, implants, dentures or more complicated smile and bite transformations, Preston Park Dental will make a plan that uniquely fits your needs. Our friendly service oriented staff will ensure your visit to the dentist is informative and comfortable. Contact us today at (972) 519-1990.



  • Preston Park Dental
    Diana L. O'Quinn, DDS
    4817 W. Park Blvd.
    Suite 820
    Plano, TX 75093
    Phone: (972) 519-1990
    Office Hours
    8:00am - 4:00pm
    8:00am - 4:00pm
    8:00am - 4:00pm
    8:00am - 4:00pm
  • Rachel G.
    "By far the best dental experiences I have ever had. Everyone in the office is so nice, and Gail is the gentlest dental hygienist on the planet. Nothing she does hurts and my teeth are super clean. Dr. O’Quinn is extremely competent, capable, skillful and doesn’t recommend unnecessary work. I recommend this practice to friends often and gladly."
  • Krystyna I.
    "I have had nothing but wonderful experiences here, and in fact, I drive nearly 30 miles RT to see Dr Oquinn. She is very gentle and considerate, and does excellent work."