GRINVIEW SMILES - Key Persons


Dr. Clayton Cook

Clayton Cook was born and raised in Cache Valley, Utah, and comes from a large family - he is the 5th of 6 children. Growing up, Dr. Cook spent many hours in his father's podiatry office cleaning rooms, stocking cupboards, and - when his dad wasn't looking - playing with equipment. Consequently, Dr. Cook discovered his fascination with the medical world at a very young age. Dr. Cook met his best friend, Kallee, now his wife, in 9th grade. After graduating from high school, he worked in the Dallas area for a short time and fell in love with Texas. He left Texas to serve a Christian mission in Hiroshima, Japan. Shortly after returning, he married his wife, and they've been married for 8 years and have 4 beautiful children. Dr. Cook graduated from Utah State University, majoring in Biology with minors in Chemistry and Japanese. He attended dental school at Midwestern University in Glendale, Arizona. In his spare time, Dr. Cook enjoys hiking, playing sports of all kinds, reading, challenging his wife to a game of scrabble, and giving his kids "Wild Buckin' Bronco" rides in the family's front room. He's always wanted to make it back to Texas and is so excited to be in Grandview.

Dr. Geoffrey Barnum

Geoff Barnum grew up in southern Idaho and is the third of four children. He attended Idaho State University, where he received his Bachelor's degree in Biology. He took a leave from his studies to serve a Christian mission in South Korea. While studying at Idaho State, he met his beautiful wife Becky. They have been married for over 14 years and have 6 children together. He enjoys spending time with his family when he is not in the office. Dr. Barnum completed his dental school training from Case School of Dental Medicine in Cleveland, Ohio. The family enjoyed their time there but ran away from the bitter winters and have called Texas home since 2011. Dr. Barnum continues to learn about new dental techniques by taking continuing education courses so he can provide the highest quality of care to his patients. Dr. Barnum was very involved in athletics and outdoor activities as a youth and continues to enjoy these today. He enjoys frequenting all the local restaurants and can't get enough Tex-Mex!

Dr. Michael Grier

Dr. Michael Grier is a native Texan and grew up in a small town on the edge of the Dallas-Fort Worth Metroplex. He has lived in North Central Texas his whole life except for four years in Houston while in dental school. Dr. Grier earned his Bachelor of Science in biology and chemistry from Texas Wesleyan University and his Doctor of Dental Surgery from the University of Texas Health Science Center School of Dentistry. Dr. Grier started working in his father's dental lab when he was only 15 years old and had six years of experience as a crown and bridge lab technician prior to dental school. He began surgically placing implants in 1988, has continued orthodontic training and has been an American Orthodontic Society member since 2005. Dr. Grier loves helping patients achieve the smile they want and deserve. He enjoys helping patients find hope with full-mouth rehabilitation, dental implants, and orthodontics. One of his greatest passions is helping young patients achieve a straight, healthy smile without braces using the No Brace System he developed himself. When he's not in the office, Dr. Grier enjoys water sports, including wakesurfing, water skiing and WaveRunners. He also enjoys snowboarding in Colorado, as well as bow fishing! He loves to take the boat out on the river, as well as cooking and entertaining. Dr. Grier has been married to his wife for over 40 years, and she has been in dentistry as long as he has! Together they have four children, two boys and two girls. Three of them are adopted, and all but one of their daughters is married. They have four granddaughters that they enjoy spending time with.