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Dr. Nathan Guilford trained at the University of Oklahoma Dental School and graduated in 2001. He has continued his education to remain up-to-date on the most modern practices on a variety of topics from new materials for fillings to the comfort of patients in sedation dentistry.

Dr. Guilford was raised in the small southwestern Oklahoma town of Frederick. Growing up in that close-knit community, he learned about trustworthy small town service.

He attended the University of Oklahoma for his undergrad, majoring in zoology and playing in the Pride of Oklahoma Marching Band.

Prior to opening Toothbrusher's Dental in 2005, Dr. Guilford worked with a practice in south Oklahoma City and was a touring dentist, working with a variety of dentists across the state.

He is married to Julia Kirt, who is the Executive Director of Oklahomans for the Arts and they enjoy lots of smiles with their two children.


Dental Hygienist

Kala earned a Bachelors of Science in Dental Hygiene from the University of Oklahoma and joined the Toothbrusher’s Team in 2007.

Kala received the Young Alumnus award winner of the OU College of Dentistry and was the 2011 President of the Oklahoma Dental Hygienists' Association.

She is an avid Sooner fan and . now she also enjoys spectating her kids’ many sports too.

Kala cleans patient's teeth, keeping your smile bright and shiny.

Dental Assistant

Laura has been with Toothbrusher's since 2006 after graduating at the top of her dental assisting class at Oklahoma Health Academy.

An Altus native, Laura enjoys spending time with her friends and family, going to church and movies, playing sports and volunteering.

Laura helps with patients’ comfort and provides x-rays, polishing, and chairside assisting for Dr. Guilford.

Front Office Manager

Zona has over 25 years of experience as an office manager and project coordinator.

She loves to cook, read, walk her dog around Lake Hefner, and spend time with family and friends. Her son, Adam, is currently a dental student, attending OU School of Dentistry.

Besides welcoming patients, she works extensively with insurance companies to obtain the most reliable insurance coverage.

Reach her at                 405-789-6935 or

Dr. Guilford is one of the kindest caring dentists I have ever had.
— Bill B.


It has come to my attention that many people get dental hygienists and dental assistants confused.  It’s an understandable mistake.  Both perform supportive roles in the office and see patients independently sometimes.  Furthermore in my office, we have more of a team approach and the hygienist and I will sometimes perform the assistants’ duties too. But dental assistants and hygienists do have different tasks that they perform in the office and also have differing levels of training.

In my office, Cheryl and Laura are the dental assistants. They prepare the room for treatment, get out all the equipment, and sterilize the room.  They will help the dentist with the procedure, passing instruments and mixing materials and such.  They can take x-rays, impressions, polish teeth, and educate patients on everything from insurance co-payments to oral hygiene.

Kala is our dental hygienist.   She has more specialized in the area of oral care and cleaning teeth.  Kala will remove calculus (or tartar), chart dental conditions, administer local anesthesia, and may work autonomously from the dentist. However, different states have different rules on the level of autonomy. 

Most dental assistants will receive a diploma or certificate from a vocational school and the program will last from 9 – 12 months.  Dental hygienists receive a bachelor’s degree in dental hygiene.  In Oklahoma, a four year degree is required to be licensed to perform the duties of a dental hygienist.