Our Doctors


Richard D Davis, DDS

Endodontic Specialist located in San Antonio, TX

Rick D Davis, DDS

Growing up the son of an Air Force pilot, Dr. Davis graduated from high school in Tokyo, Japan, and attended college at the University of Washington.  He graduated from the University of Washington dental school and entered the Air Force as a general dentist in 1978.  Dr. Davis maintained a general dental practice in the United States Air Force from 1978 until he retired from active duty in 1999 (pictured in a retirement photo with his father).

During that time, he completed the Air Force one-year AEGD residency and two-year Advanced General Dentistry Residency.

In addition, he completed a fellowship in biomaterials at the University of Indiana.  During his 21 year Air Force career, Dr. Davis served as a clinical instructor, research director and lecturer for twelve years.  He has published a number of scientific articles and research abstracts, as well as textbook chapters, and has lectured on a variety of scientific topics. Following retirement from the Air Force in 1999, he completed the graduate program in endodontics at the University of Oregon in 2001.

Following his post-doctoral training, he joined his former Air Force colleague and long-time friend, Dr. Rick Schwartz, in practice and since that time has maintained a private practice limited to endodontics in San Antonio, Texas.  His free time is spent primarily with his children, Kathleen and Collin.  He enjoys sports and recreation of all kinds and when he isn’t studying with his college-age kids, he likes to run and mountain bike.


Richard S Schwartz, DDS

Endodontic Specialist located in San Antonio, TX

Rick S Schwartz, DDS

Dr. Richard Schwartz graduated from the University of Minnesota School of Dentistry in 1977. He spent 19 years as a restorative dentist before pursuing post-graduate training in endodontics. Early in his career, Dr. Schwartz completed a two-year general dentistry residency while serving in the U.S. Air Force. Following that, he balanced private practice, teaching, and dental materials research before entering endodontic training in 1996.

Dr. Schwartz has authored over 100 articles and abstracts in scientific journals and has been a cover author for three editions of “Fundamentals of Operative Dentistry” by Quintessence Publishing Co. He is also the first author of “Best Practices in Endodontics” and a cover author of “Advanced Cone Beam Computed Tomography for Endodontics.” His expertise has taken him around the globe, having lectured extensively across the U.S. and in 20 other countries.

In addition to his clinical and academic contributions, Dr. Schwartz has lectured 12 times at the American Association of Endodontists (AAE) national meeting. He was a founding member of the International Association of Endodontics (IAE) and served as its first secretary/treasurer. Dr. Schwartz is also a member of the American Dental Association (ADA) and the International Association of Dental Specialists (iADS), where he sits on the board.

Dr. Rick S Schwartz with grandkids

Since 1998, Dr. Schwartz has been in full-time private practice, specializing in endodontics in San Antonio, TX. He has practiced alongside Dr. Richard Davis since 2001. Dr. Schwartz has been married to his wife, Jeannette, since 1976, and they have a daughter who is an engineer in Austin, happily married and has blessed them with two lively grandchildren.


Dr. Zhangrui

Dr. Zhangrui Endodontic Consultants of San Antonio

Dr. Zhangrui “Zac” Liang grew up in China and has been in the U.S. for 9 years. His parents enrolled him in English classes starting at age 3. He attended dental school in China and did his endo training at UCLA. Chinese students are selected to study in the U.S. strictly on merit. They undergo a series of tests and award study visas only to those with the highest scores. He also holds a Master of Science degree.

Dr. Zac is very bright, self-confident, and personable, with a nice dose of humility. He has a gentle, friendly personality that translates well to patient care. In his spare time, he is an avid snowboarder, swimmer, and an aspiring chef.


Dr. Wisam

Dr. Sakr Endodontic Consultants of San Antonio

Dr. Wisam Sakr was born in Saint Paul, Minnesota. He has been practicing dentistry since 2004. He graduated from the University of Southern California School of Dentistry in 2013. He furthered his dental education by completing an Advanced Education in General Dentistry (AEGD) program at Pittsburgh School of Dental Medicine in 2014. He then pursued a Specialty and Master’s degree in Endodontics at West Virginia University Health and Science Center, which he completed in 2016.

He is an active member of the American Association of Endodontics and the American Dental Association. He spent his last 8 years practicing Endodontics in San Antonio, TX, Virginia Beach, VA and Pittsburgh, PA.

In his spare time, he enjoys going hiking, kayaking and biking with his wife Mona. His favorite outing is a picnic amongst family and friends. His favorite sports are swimming, tennis and running. His favorite book is Clear and Present Danger. His favorite movie is Knight and Day. He is a Vikings fan, and he loves middle eastern cuisine.

Dr. Sakr’s goal is to provide the highest quality of dental care in a compassionate and comfortable environment of professionalism and clinical experience using the most current materials and technology available.


Dr. Richard S. Schwartz Wins 2019 AAE President’s Award

Dr. Richard S. Schwartz Wins 2019 AAE President’s Award

Dr Rick Schwartz in a podcast on Endodontics with Howard Farran of Dental Town.

Dr Rick Schwartz in a podcast on Endodontics with Howard Farran of Dental Town.