Our excellent dental team is here to serve you. We are dedicated to making your visit to Prairie Creek Dental (Randall Dental Associates) as comfortable and pleasant as possible.


Gregory S. Holbrook, DMD

Dr. Gregory S. Holbrook is an experienced dentist who has been practicing for over 22 years.  He graduated from Oregon Health Sciences University in 1996 with a Doctorate of Dental Medicine. After graduating, he practiced in Idaho for 20 years before moving to Texas.

Dr. Holbrook, and his wife, Holly, have been married 27 years have six children. Dr. Holbrook is an active member of his faith, and enjoys spending time serving those around him. He has participated in humanitarian service around the world, including El Salvador, Guatemala, and China.  He also enjoys outdoor activites such as hiking, hunting, fishing, snow skiing, white water rafting and more.

Dr. Holbrook’s mission is to recognize needs, relieve suffering, restore confidence, and reach out to serve. Dr. Holbrook helps his patients feel relaxed and comfortable because of his gentle touch and calm demeanor. He has state-of-the-art equipment and practices all phases of clinical dentistry, specifically cosmetic, implant, and sedation dentistry. He keeps his skills at the highest level by regularly attending trainings and continuing education courses.

Connie Crittendon – Health Relationship Coordinator

Originally from Enterprise, Alabama, Connie moved here in 1997 and joined her brother-in-law’s dental practice on Main Street in Lewisville, Texas. When he retired in 2005, she joined Randall Dental Associates. Connie married her best friend, Bubba in 1986. They are blessed to have one son, David, and a wonderful daughter-in-law, Jennifer. Connie loves spending time with her family. In her spare time, she enjoys working her gift box business. Connie enjoys watching college football, NASCAR racing, and movies. And with the encouragement of one of her best friends, Julie, she is beginning to enjoy the practice of yoga.

Julie Costly, RDH, BS – Registered Dental Hygienist

Born in Southern California but raised in the Texas Panhandle, Julie is a native Texan by heart. She graduated summa cum laude from Texas Woman’s University with a bachelor’s degree in health sciences and a minor in biology. She has been a registered dental hygienist for 15 years.Once an avid runner, Julie has completed two Boston Marathons. Although she enjoyed running, she now spends a lot of time outside the office on the yoga mat. She recently completed her 500-hour yoga teacher training certificate and enjoys teaching Hatha yoga. Julie enjoys spending time in the kitchen with her husband, LC. His Cajun cuisine keeps her fueled up for her yoga practice. Julie loves watching football, movies, and time with friends and family. She works hard to keep your smile beautiful and healthy. She looks forward to seeing you in our office for your next dental cleaning.