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


Gregory S. Holbrook, DMD

Dr. Gregory S. Holbrook is an experienced dentist who has been practicing for over 22 years.  He aims to provide a dental experience that is relaxed and comfortable, while offering his patients peace of mind.  Dr. Holbrook’s focus and passion is to build personal relationships, beautify smiles, restore confidence, and changing lives one smile at a time.  Dr. Holbrook’s patients have a great experience 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.  He graduated from Oregon Health Sciences University in 1996 with a Doctorate of Dental Medicine.  After graduating, he practiced in Idaho for 21 years before moving to Texas.

Dr. Holbrook, and his wife, Holly, have been married 27 years, and they have six children. Dr. Holbrook loves being a husband and father, is active in 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.

The Dental Team at Prairie Creek Dental Lewisville, TX

Left to Right – Angela, Gaby, Dr. Holbrook, Julie, Connie, Karleen

Angela McMillan – Registered Dental Assistant

 Angela has been a Registered Dental Assistant for 13 years. She enjoys making our patients feel totally comfortable and going above and beyond to meet their dental needs. In her spare time,she enjoys spending time with family, and traveling as well. She is a mother of four adult children and grandmother of five beautiful grandchildren who motivate her to be the best she can be!

Gaby Renenquez – Registered Dental Assistant
 Gabrielle Requenez was born and raised right here in Carrollton Texas. She is the youngest of three, and just welcomed her own little guy in October of 2018. Growing up she always knew she wanted to have a career in the health industry. After graduating from high school she got hired on at her first dentist office and was given a great opportunity to become a dental assistant.  Then she eventually transferred up to front office. She enjoys dental assisting because there are so many opportunities to learn and challenge herself and she also loves the interaction she has with patients.  She enjoys working in the dental field and is excited to pursue her dream of becoming a dental hygienist in the near future.

Julie Costly, RDH, BS – Registered Dental Hygienist

 Julie is a native Texan by heart. A graduate from TWU, she has been practicing as a Registered Dental Hygienist for 16 years.  She enjoys running and yoga.  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. Julie also 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.

Connie Crittendon – Health Relationship Coordinator

Originally from Enterprise, Alabama, Connie moved here in 1997.  She has been a receptionist and patient health coordinator in the dental field for 22 years.  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, as well as managing her own gift box business. Connie enjoys watching college football, NASCAR racing, and movies.

Karleen Sirrine – Office Manager

Karleen grew up partially in New Jersey and then Arizona.  She has worked in the dental industry since she was 15 years old and loves it.  She enjoyed working as a dental assistant for many years, but loves the interactions with people she has as an office manager.  She is the youngest of eight children, and now has four of her own.   She is fairly new to Texas and is excited to find new adventures here in the Lone Star State.  She loves hiking, camping, offroading and all things outdoors.