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About us – iSmile Dentist | General & Family Dentistry

Dr. Richard Ragnell

Dr. Ragnell has over 30 years of experience and is a passionate and continuing student of Dentistry. His interest in continuing education has taken him all across the country to learn about the best possible care and overall health of his patients. In his free time, he is crazy for cooking and loves to build furniture in his woodshop! His faithful dog, Sascha, is always with him when he’s at home. Dr. Ragnell is a native Dallasite.


Mari has over 30 years of experience in dentistry and has been working with her husband, Dr. Ragnell, for over 20 years. She’s the office administrator for our Plano dental office but is also a registered dental hygienist. Mari loves the flexibility afforded by her vast experience and enjoys helping out around the office wherever she is needed.


Danneen is from Plano, Tx and has been working in the dental industry for 26 years. She has three beautiful children – 2 boys and 1 girl. Her best buddy is her Cocker Spaniel. In her spare time she enjoys taking a little time to relax and watch movies.

Bio coming soon

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