1306 S. Blue Bell Road
Brenham, TX 77833
Altman Dentistry, Brenham Texas.

Meet the Doctors

Our mission is to meet our patients where they are. We strive to do quality work and serve our dental patients and community with the utmost integrity and honesty. We feel it is our responsibility to relate and develop close, comfortable and friendly professional relationships by understanding our patients’ needs. Our goal is to meet and exceed our patients’ expectations.


Dr. Altman attended Blinn College and Texas A & M University in College Station. In 1993, he graduated from University of Texas Dental Branch in Houston, Texas.

Dr. Altman believes strongly in continuing education, not only for himself, but for his Staff, as well. The entire Team participates in continuing education classes every year on a regular basis, so they can provide the latest techniques and technology for the patients of the Practice.

Dr. Altman has been a resident of Brenham since, 1971, and he started his dental practice in 1994. He has two sons, Garrett, who is a football coach at New Mexico State, and Colson, who lives in Fort Worth and works for Medtronics. Dr. Altman attends St. Johns Prairie Hill Church. He enjoys many outdoor activities, including fishing and hunting. Spending time at the ranch is a favorite past-time, and he has recently taken scuba diving lessons…we will see where this leads?

Dr. Altman won the “Dentist of the Year” award from the “Banner Press” in 2009, 2012, 2016 and 2018, 2019, 2020, 2021 and 2022.

Dr. Altman participates with a number of Professional Organizations including:

  • American Dental Association
  • Texas Dental Association
  • Brazos Valley District Dental Society
  • Academy of General Dentistry


Dr. Altman participates in Charitable Organizations including:

  • Brenham Rotary Club CCP
  • Graham Masonic Lodge in Brenham
  • Washington County Chamber of Commerce
  • Ducks Unlimited
  • Brenham Independent School
  • Coastal Conservation Association
  • International Game Fish Association


Dr. Knowles completed his Bachelor of Science Degree in 1988, from Stephen F. Austin University. In 1992, he graduated from the University of Texas Dental Branch, Houston State University.

He and his wife, Lillian, have two boys Josh and Jake. Dr. Knowles was a weekender until 2006, when he decided to make Washington County his new home. They wanted to raise their boys in a family-oriented community.

Dr. Knowles and his family enjoy life on the ranch. He and his family are members of First Baptist Church of Brenham. The family enjoys traveling together, camping and new adventures.