1306 S. Blue Bell Road
Brenham, TX 77833
Altman Dentistry, Family and Cosmetic Dentists in Brenham Texas.

Meet the Doctors


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. Some of the many other things Dr. Altman enjoys are fishing, hunting, and attending his son’s football games.

Dr. Altman and his wife, Sabrina, have been residents of Brenham since, 1971. Together they started the dental practice in 1994. Sabrina is a registered Dental Hygienist in the State of Texas, and she practices hygiene, as well. Together they have two sons, Garrett, who attends and plays football for TCU, and Colson, who is a senior at Brenham High School, and also plays football. The Family attends St. Johns Prairie Hill Church. Dr. Altman and his family love doing things together, and outdoor activities are at the top of the list, especially fishing.

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

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 Board Trustee
  • 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.