Our Doctor

Timothy E. Gardner
Dr. Tim Gardner is a long time resident of Montgomery County and graduated from the Woodlands High School in 1983. He attended The University of Texas at Austin, where he received his BBA of Finance. He then graduated with Honors from the University Of Texas Health Science Center in San Antonio, where he received his Doctorate of Dental Surgery in 1991. While there, he served as Class President for his final three years. He was also one of five students selected to participate in their pre-doctoral implant course where he learned to place and restore implants.

Dr. Gardner is passionate about the art and science of dentistry and realizes the impact he can have on people’s self-esteem, confidence and overall health. He truly enjoys serving the people of Montgomery County for the last 25 years.

Dr. Gardner is one of only 271 dentists in the nation who has earned his Fellowship (LVIF) from the prestigious LVI Institute. Due to his commitment to continuing education, Dr. Gardner is able to treat patients who are suffering from chronic head and neck pain, TMJ/TMD issues, sleep apnea, bad bites, etc. This dedication distinguishes Dr. Gardner by proving his dedication to quality of care and a desire to master complex procedures in order to provide the best comprehensive care for his dental patients.

In addition to the LVIF, Dr. Gardner has also earned his Fellowship of the Academy of General Dentistry and is a member of American Academy of Dental Sleep Medicine, American Orthodontic Society, and American Academy of Implant Dentistry. He is currently pursuing his mastership from the Las Vegas Institute and Academy of General Dentistry, as well as his diplomat status in the American Academy of Dental Sleep Medicine and American Orthodontic Society.

When not practicing dentistry, Dr. Gardner enjoys spending time with his wife and two children, playing tennis, golfing, water skiing, hunting, gardening and doing just about anything outdoors.


Credentials and Memberships

LVI Fellow and Preferred Dentist

Fellow of the Academy of General Dentistry

American Academy of Dental Sleep Medicine

American Orthodontic Society

American Dental Association

American Academy of Implant Dentistry

Texas Dental Association

Conroe Chamber of Commerce Since 1992

World Academy of Laser Dentistry

Member of the Better Business Bureau

Meet the Team

Rachel Burrough – Registered Dental Hygienist

Dr. Gardner is passionate about continuing education and training for our team in order to provide the absolute best experiences, care, and dentistry for our patients. Our team is one of a kind and we aim to exceed our patients’ expectations. It is a blessing to work for someone who cares about giving back to the community. Dr. Gardner has two annual volunteer events; one to serve our veterans (Dentistry for the Vets), and the other to serve the less fortunate of Montgomery Country (Dentistry from the Heart).

My husband and I have two beautiful daughters, Adalynn and Ariyah, and my son, Ayden. Aside from the busy life of work and home, I enjoy Bible study, spending time with my family and friends, camping, hiking, nature and traveling when I have the opportunity.

I am from Conroe, Texas, and graduated from Conroe High School in 2000. I took three semesters of basic courses at Lonestar College and decided to move to Colorado Springs with a few friends. While living there, I went to school for dental assisting at Intellect Medical Institute. Although I loved living near the mountains and enjoyed time outdoors, it just wasn’t home.

After completing the dental assisting program, I moved back home and worked as a dental assistant for six years. During that time, I continued my education at Lonestar College to become a dental hygienist while raising my first child, Ayden. I received my associate degree in dental hygiene in 2013 and have been working for Dr. Gardner ever since. Becoming a dental hygienist was my goal for several years, and I now strive to perfect my skills, continue to grow in my profession and provide excellent care to our patients.

Logan Freeman – BSDH Registered Dental Hygienist

Logan is new to the Conroe area and to the teams at Conroe and Montgomery Comprehensive Dental Centers, but she is a quick learner who enjoys looking for new places to eat and shop, and she already loves it here.

Logan graduated magna cum laude from the dental hygiene program at the Tyler Junior College in May 2020. She received her bachelor’s degree magna cum laude in dental hygiene in May 2021. She loves getting to know and building trusting relationships with her patients, and she loves working with such a friendly team, completing her duties as a dental hygienist at the highest level of patient care and satisfaction.

When she is not working, Logan likes to cook and watch movies with her two dogs, a Miniature Schnauzer named Ellie and a white Labrador named Princess.

Carissa Fox – Treatment Coordinator & Team Leader (Conroe Office)

I enjoy working with Dr. Gardner and seeing him live out his God-given talent. His compassion and drive to care for his patients are outstanding qualities to witness. Working for him has given me the opportunity to not only help broaden my knowledge of the dental field, but to really expand my character traits in such a positive manner, as we give back to the community with our charity events.

I was born and raised in Mississippi and moved to Texas in 2016. I am happily married to my husband, Luke, and we have two beautiful daughters, Avery and Abigail. During my free time, I enjoy reading books, being outdoors, and spending time with my family. I also enjoy checking out all the local festivals.

In 2012, I earned my associate degree in applied science. I became a registered dental assistant in 2018 by attending the Montgomery County Dental Assisting School. I am also certified in CPR and have experience in medical coding. I have been in the healthcare industry for almost eight years, and I began working with Dr. Gardner in 2017.

Oly Rodriguez – Instructor & Registered Dental Assistant 

I have been in the dental field for 10 years and began working for Dr. Gardner’s office in 2012. The dental assistant position allows me to communicate and interact with patients. I enjoy helping patients overcome any concerns about their treatment and explaining the technologies and materials we use. I am also very happy to help patients who speak Spanish

I love the way all of our patients become part of our dental family. Our practice is dedicated to providing the best dental care to all patients. We do our best to make all patients’ visits as pleasant and comfortable as possible. I’m really honored to be part of this team. I am committed to making your dental visit very enjoyable.

During my free time I enjoy spending time with my husband and two kids, playing any outdoor sport or just relaxing at home watching movies.

Kayla Sims - Instructor & Registered Dental Assistant
I have lived in Magnolia, Texas my whole life and have been in the dental field for six years. As an instructor, I’m passionate about seeing students learn and enjoy dentistry!   

I enjoy spending time with my family and friends and anything that has to do with music or arts and crafts. 
I am motivated to help people feel comfortable when visiting the dentist.  I like to help very nervous patients relax and smile and even laugh which is one of my favorite parts of dentistry. I thought I knew the majority of dentistry but Dr. Gardner and our team has opened a wide range of knowledge and specialties that opened my eyes to a new playing field in dentistry for me.  Looking forward to continued growth with this wonderful team.

Amanda Rios – Treatment Coordinator

Amanda is one of smiling faces you will meet at the front desk of Montgomery Comprehensive Dental Center and has been working with the practice since November 2020. Amanda graduated from Sam Houston State University in 2017 with a degree in criminal justice and forensic science. She was also a member of Alpha Phi Sigma: The Criminal Justice Honor Society. Since joining our team, Amanda has proven to be a real team player. She loves working in such a positive, happy environment and is always eager to help any way she can!

Amanda has five sisters and one brother, as well as a 2-year-old godson and cat lovingly named Winnie after Winnie the Pooh. When she is not manning the front desk, Amanda enjoys working out and reading mystery novels.

Juanita Castillo – Hygiene Coordinator & Patient Accounts Coordinator

I joined Dr. Gardner’s team in 2020. I enjoy working with Dr. Gardner because he is such a humble person, always gives his patients the best care available and always gives back to the community. I have three years of experience in the dental front office. I want my patients to have the best experience possible as soon as they walk into our office. I also speak Spanish and am always happy to help our Spanish-speaking community.

I am originally from Washington and moved to Texas in 2001, where I met my spouse Erik. We have two daughters, Miriam and Eliza. I love to spend time with my family and travel. I enjoy shopping, dancing and decorating my home. My favorite food is seafood and Mexican food. To relax, I enjoy watching Netflix with my family with some good snacks.

Mariella Banegas – Front Office

Mariella joined our team in April 2021. She graduated from LoneStar College with her Associates of Science degree in 2018. She also obtained her RDA in 2018. Mariella is passionate about helping others and enjoys learning new things to expand her knowledge. She enjoys seeing our patients walk out the door with a smile on their face, it warms her heart.

Everyday she tries to learn and grow. She contributes her smile and positive attitude to our team and patients. Mariella is the oldest of two. Her dad is from Honduras, and her mom is from El Salvador. She has two dogs and loves watching movies and experiencing new foods.

Susan Istre – Insurance Concierge

I enjoy working for Dr. Gardner because he is so passionate about his work and making sure his patients get the best care possible.

Outside of work, I love spending time with all six of my grandchildren, watching them play baseball, football and riding their horses. My favorite pastime is traveling, especially to the beach. Just give me a chair and a book, and I’m set to go!

I have been working from home for over a year now and I really enjoy my job. This gives me the opportunity to spend more time trying to make sure all claims are paid in a timely manner. I like my job and I feel I am a good asset to our team.

Tracey Tsitso – Marketing Director & Team Leader (Montgomery Office)

I joined Dr. Gardner and his team in March 2020. I am really enjoying being part of this team and truly enjoy my work. We begin each day with a team prayer, and it is honestly the best way to start our day.

I am married and have three sons. I enjoy spending time at the beach under an umbrella in a comfortable chair with my husband and try to go as often as possible. I enjoy traveling and have been blessed to visit many places in the United States and many other countries. My absolute favorite travel was a trip we took to Italy, where I was fortunate enough to attend a Catholic high mass by a cardinal in a 3,000-year-old cathedral in Genoa. It was an incredibly amazing spiritual experience! I really love volunteering in the community. I’ve volunteered as a Catholic faith formation teacher, breast cancer charity fundraiser, American Cancer Society committee member, and American Heart Association fundraiser. I have also volunteered on several American Diabetes Association campaigns, as my oldest son has Type 1 Diabetes.

I live in Spring, Texas and moved to Texas in 1995 from Chicago. I literally started college the actual day I took my youngest son to kindergarten. I studied communications, marketing, journalism and have a passion for overall wellness. I was previously a Corporate Wellness Coordinator for a global company and have always worked in healthcare.