About our office

Cornerstone Dental is a beautiful new office conveniently located, with close, safe parking directly in front of Murphy's Park, at 353 West Olentangy Street. Dr. Kromhout and his team have created an inviting atmosphere with comfortable, modern treatment rooms and an environment that promotes teamwork between the patient and the dentist. They focus on comprehensive dentistry that addresses the patient's complete oral healthcare needs. As a general dental office, the Cornerstone Dental team emph...Read More

Meet our team

Dr. John Kromhout Read Bio

For more than nine years, Dr. John C. Kromhout has served Columbus area patients with comfortable dental care built to last. As a third generation dentist, he looks forward to serving the Powell community. Dr. Kromhout grew up in Hilliard, Ohio, then traveled to Miami of Ohio for his undergraduate degree. In 2004, he received his Doctor of Dental Medicine (DMD) from The University of Kentucky. Dr. Kromhout continues to participate in post-doctoral dental continuing education courses. He is a me...Read More

Ashley H. Read Bio

As our Practice Coordinator, Ashley Hammond takes great pride in meeting the customer relations needs of our practice. She looks for opportunities to make a difference and is particularly excited to welcome patients into our new practice. Ashley earned a Bachelors Degree in Business Administration with a minor in Medical Office Management from Franklin University. She has spent over ten years in the dental field working in a dental lab as well as in a dental office. Ashley is able to provide ...Read More

Tiffani L. Read Bio

Tiffani is our EFDA/Certified Dental Assistant. She has been working in the dental fiend since 1999. In 2010 she received her certification in Expanded Functions for Dental Auxiliaries (EFDA) giving her the training and capability to place restorations (fillings and sealants). She is passionate about placing restorations that make the patient feel great about their smile. Tiffani also takes great pride in building trusting relationships with our patients by explaining procedures and answering an...Read More

Allison M. Read Bio

Allison is our Registered Dental Hygienist who graduated from CSCC with a Degree of Applied Science in Dental Hygiene. She is also licensed to administer local anesthesia and nitrous oxide sedation. She has a great interest in the field of dentistry and keeps her knowledge up to date by completing many hours of continuing education per year. She loves forming relationships with her patients and educating them on how to keep a healthy smile. In her free time, Alli enjoys staying active by runn...Read More

Jessica P. Read Bio

Jessica is a Registered Dental Hygienist with a passion for dentistry. As a graduate of CSCC, she has a Degree of Applied Science in Dental Hygiene and is licensed to administer local anesthesia and nitrous oxide sedation. She loves working with patients and meeting new people through her profession. Jess takes pride in providing the best individualized care possible to everyone she meets. In her free time, she enjoys staying active through yoga and spinning classes. She also loves boating wi...Read More

Ashlee I. Patient Coordinator Read Bio

Ashlee is our Patient Coordinator. She graduated from Ohio University with a bachelors degree in Environmental Biology in 2014. Since then, she has decided to go back to school to pursue Dental Hygiene. She is excited to learn all the ins and outs of the dental world as she works on her degree and is very excited to meet all the Cornerstone patients! In her free time, Ashlee enjoys visiting restaurants and breweries throughout Columbus with her boyfriend, Danny. She also enjoys spending lots ...Read More

Patient Satisfaction

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Services we provide

At Cornerstone Dental we strive to provide our patients with the best and most complete dental care. Our doctors and staff frequently attend continuing education seminars to learn the latest dental techniques. Here are some of the services we provide, please click here.

Payment Forms

We offer a number of convenient payment options for our patients which make it easy to afford any care you may need.