Jo Ann Thiel, D.D.S.


Dr. Jo Ann Thiel, D.D.S, P.A.

Dr. Jo Ann Thiel and her staff strive to make the patient visit as pleasant as possible in their comfortable, technologically advanced environment. Integrity and superior healthcare is paramount. She stays abreast of the most current practice trends available by attending seminars and continuing education course to keep her practice up to date with the latest techniques. Dr. Thiel utilizes a team approach. She has forged alliances with some of the best local specialists to give her patients the best possible outcome.

Dr. Thiel is proud to have been born in nearby McKinney and was raised in the great state of Texas. She graduated in 1979 from the University of Mary Hardin Baylor with a BSN in Nursing. She worked at VA hospitals in Temple and Waco before pursuing dentistry. She attended the University of Texas Dental Branch at Houston. Upon graduation in 1987 she moved to The Colony, Texas and started her dental practice. Her office at 4695 North Colony Blvd is right across the street from that original office. She enjoys traveling, reading, and attending the First Baptist Church in The Colony. She is married and has three children.



Teresa Collins, R.D.H.

Teresa started as a Dental Assistant, graduating from Louisville Dental Assistant School. She loved the dental field so much that she continued her studies at the University of Texas Health Science Center for Dental Hygiene. Teresa enjoys working with patients to get the great teeth they want and deserve. Teresa is married with five kids and a loving grandson. She loves to read and sing, although she is a much better Hygienist than a singer.



Lucille Santoya, R.D.A.

Lucy Santoya graduated from Dental Replacements Training Academy in 2010 as a Registered Dental Assistant with Expanded Functions. She is also certified in Nitrous Oxide Monitoring,Sealants and Coronal Polishing.She thoroughly enjoys the fascinating adventure of dental assisting. She enjoys meeting all the new and established patients that walk through the door. She will treat you as though you are family and makes sure you are comfortable during your procedure. In her past time she enjoys spending time with her husband and her two teenager daughters and three doggies. When not spending time with family she is participating in boxing / kickboxing class,riding her bike,gardening and Yoga.



Diane Smith

Diane is the newest addition to Dr. Thiel's awesome team. However, she is definitely not new to dentistry. Diane is an RDA and has over 20 years experience in all phases of dentistry. She can assist you in understanding your treatment and your insurance. We understand dental benefits can be confusing and Diane is an expert in helping you with any concerns you may have. Diane has lived in The Colony for 3 years and moved here from the little town of Peaster, just west of Weatherford. Her kids are grown and still live out west of here. She loves helping others and she is the cheerful face you see as you enter the office.


Debbie Stacha

Debbie has worked with Dr. Thiel since 2008. She loves greeting each and every patient as they walk through the door and strives to make your experience in the office as pleasant as possible. A native Texan, she has lived in the The Colony for 18 years with her husband, three children and numerous pets. Her hobbies include cooking, reading, arts and crafts, baseball games, boating,gardening, spending time with her family, riding bikes and looking for a bargain in an antique store. Debbie attends Elevate Life Church in Frisco, TX where she serves in children's ministry.