Meet Our Dentists
Meet Dr. Justin Dinsmore
Being a dentist means providing the best possible oral healthcare in a fun and secure place.
I appreciate the diversity of my days and how no two patients are the same. Every conversation and each procedure is new, exciting, and has me thinking of the best way to meet the individual’s needs. Becoming a dentist was a natural path for me: I wanted to get to know people and be part of their healthcare team, so each can enjoy a healthier and happier life!
Creating and ensuring a healthy, beautiful smile is what drives my passion for dentistry. I am happy to help people have optimal dental health and smiles they are confident to share. Seeing a patient’s pride in their smile, once work is completed, brings me great joy.
~Dr. Justin Dinsmore
EDUCATION AND PROFESSIONAL AFFILIATIONS
Dr. Justin Dinsmore attended the University of Tennessee Health Science Center College of Dentistry, where he was awarded his Doctorate of Dental Surgery.
Dental school gave him a solid foundational knowledge of the science, medicine, and art of dentistry. However, dentistry, like all areas of healthcare, is a constantly advancing field, and requires practitioners to stay current on the latest changes in order to provide the best care to their patients.
Dr. Dinsmore is a committed lifelong learner and constantly seeks out opportunities to further his skills.
He is an active member of the:
Manhattan Study Club
These professional organizations offer a range of continuing educational opportunities, including meetings, seminars, and lectures, as well as multiple publications. Dr. Dinsmore chooses many different courses and areas of study to ensure he is offering patients the high-quality services they deserve.
By studying with peers, and learning from leading practitioners and researchers, Dr. Dinsmore stays up to date on all new technology and techniques. This allows him to provide the best possible patient care, comfortably, and deliver the best results.
BEYOND THE OFFICE
After growing up in Knoxville, Dr. Dinsmore now resides in Farragut with his wife and son. He enjoys living a healthy and active lifestyle and loves the outdoors: kayaking, hiking, boating, and spending time in the mountains.
Downtime is enjoyed with friends and family, and cheering on Tennessee Volunteers sports and Tennessee Titan football.
Meet Dr. Mary Speicher
It is a genuine pleasure and honor to come to work every day and provide my patients with the best possible care. As a general dentist, I am able to practice all disciplines of dentistry, which makes each day different and unique. Each patient is different as well, which requires a tailor-made treatment plan for their specific dental needs. It never ceases to amaze me how much a patient’s confidence can improve when treatment is complete. The results are life changing and it’s life changing for me as a dentist to be able to provide that for my patients.
~Dr. Mary Speicher
EDUCATION AND EXPERIENCE
From a very young age I knew that I wanted to be a dentist and here I am today. When you are lucky enough to do what you love, it makes going to work a joy each day.
I attended Temple University in Philadelphia, PA where I received my Doctorate of Medical Dentistry. After graduating from Temple, I began working in general practice and started the work that would lead me here today. In 2024, I had the opportunity to join Dr. Justin Dinsmore and the team as an associate here with this amazing group of individuals! The front office, hygienists, assistants, and the doctors are willing to go out of their way to make our patients have the most comfortable dental experience. The team makes going to work so enjoyable every day. I am so fortunate to work with such a caring and competent team.
OUTSIDE THE OFFICE
I love the nature and beauty of the hills we call home. You can find me exploring the Smoky Mountains and spending time with my family when not here in the office.
CONTINUAL LEARNING
One of the most important aspects of my day to day interactions with patients is keeping on top of new and advancing research and technology. Continuing education helps me stay up to date with the latest techniques and materials along with broadening and obtaining a better understanding of treatments to provide the best care for my patients.
I am a member of several distinguished professional organizations and continue to participate in ongoing learning opportunities to ensure my patients are receiving the best care with modernized practices and treatment:
EDUCATION AND EXPERIENCE
Dr. Hinderliter brings a rich and varied academic background to the clinic. He earned his Bachelor of Science in Biology from Northern Arizona University before completing a Master’s degree in Medical Science at Mississippi College. Committed to community health, he also completed a Certificate of Public Health. He earned his Doctor of Dental Medicine (DMD) degree from the prestigious A.T. Still University Arizona School of Dentistry and Oral Health in Mesa, Arizona.
Following dental school, Dr. Hinderliter completed a rigorous clinical residency at a Veterans Administration (VA) hospital in Arkansas, gaining extensive experience managing complex restorative and surgical cases.
OUTSIDE THE OFFICE
When he is not crafting healthy smiles at the office, Dr. Hinderliter loves embracing life in East Tennessee. Having relocated from his home state of Arizona, he has a deep appreciation for the outdoors and loves exploring local trails, scenic parks, and the vibrant Knoxville community. Above all, he treasures quality time spent with his family, friends, and checking out local events
Meet Dr. Timothy J. Hinderliter
I truly love my work because dentistry is about the person in the chair, not just their teeth. Every smile is unique, so I focus on building tailor-made treatment plans that fit your life. Seeing a patient’s confidence transform after treatment is incredibly rewarding—it is life-changing for them, and honestly, just as fulfilling for me.
~Dr. T.J. Hinderliter
Clinical Expertise
Dr. Hinderliter provides a full spectrum of dental treatments to keep your smile healthy and beautiful, including:
· Standard preventive care, cleanings, and fillings
· Crowns, bridges, and advanced restorative treatments
· Root canal therapy and extractions
· Complete and partial dentures
· Cosmetic dental treatments and implant dentistry
Community & Life Outside the Office
Originally from Arizona, Dr. Hinderliter has fully embraced life in Tennessee and has a deep heart for investing in the local neighboring community. When he isn’t helping patients achieve healthy smiles, you can find him volunteering his time at local school career fairs, exploring the outdoors, or connecting with neighbors.
Education & Professional Excellence
Dr. Henley earned her Doctorate of Dental Surgery (DDS) from the University of Tennessee Health Science Center College of Dentistry. Throughout her tenure at her standalone practice, Rocky Hill Family Dentistry, her clinical approach centered entirely around high-quality preventative and restorative treatment. Her professional philosophy always prioritized the individual in the chair, building specialized treatment plans tailored specifically to each patient's lifestyle and long-term oral health goals.
Dr. Jan Henley
Dr. Jan Henley is a deeply respected pillar of the Knoxville dental community, known for providing compassionate, family-oriented general dentistry in the heart of Rocky Hill for nearly five decades. After an extraordinary career dedicated to the health and happiness of her patients, Dr. Henley transitioned her beloved practice to East Tennessee Family Dentistry ahead of her well-deserved retirement.
Life Beyond the Practice
As Dr. Henley officially steps away from clinical practice, she is incredibly excited to embrace the relaxed pace of retirement alongside Dr. John Dinsmore. She looks forward to spending abundant, uninterrupted quality time with her family, traveling, and making lifelong memories with her cherished grandchildren.
A Lasting Legacy in Knoxville
For Dr. Henley, dentistry has always been about much more than fixing teeth—it has been about cultivating foundational trust and transforming patient confidence. Alongside her husband, Dr. John Dinsmore—a fellow esteemed local dental practitioner—they have spent decades caring for generations of families across East Tennessee. Their collaborative contribution to the community’s overall healthcare standard is highly celebrated.
Meet Dr. John Dinsmore
One of our retired dentists, Dr. John Dinsmore still make an occasional appearance in the office!
My goal as a dentist is to make my patients happy with their smile and to improve their health to the best of my ability.
I chose the profession because I wanted to make a positive difference in people’s lives, while also building relationships with those in my care. I have practiced dentistry since 1974 and truly value every person I have had the pleasure to meet throughout my career. Many are unforgettable and have, in time, become friends.
I appreciate the trust my patients place in me and am dedicated to always doing what is right for each of them.
EDUCATION AND PROFESSIONAL AFFILIATIONS
Dr. John Dinsmore obtained his Doctorate of Dental Surgery in 1974 at the University of Tennessee Health Science College of Dentistry.
Since finishing dental school, Dr. Dinsmore has actively sought out avenues to further his knowledge and broaden his skills. This allows him to provide up-to-date care, using advanced techniques, for his patients.
He is an active member of the:
Manhattan Study Club
Through these professional organizations, Dr. Dinsmore has access to the latest information on new methodologies, materials, and technologies. He attends meetings, lectures, and seminars, participates in study clubs, and reads the latest publications and journals.
For Dr. Dinsmore, ensuring his patients are satisfied with their smile and happy with the outcome of their treatment, is his greatest reward. Continuing education ensures he is up to date on new technology and procedures, and provides the best care and results for his patients.
BEYOND THE OFFICE
A native of Knoxville, if Dr. Dinsmore is not in the office, he can often be found on the lake, where he enjoys boating and fishing.
Time with family, though, is his top priority. Dr. Dinsmore has two sons, Kevin and Justin. Kevin, the oldest, is a contractor and owns his own business. Justin, the younger son, graduated from UT Health Science College of Dentistry and owns Atomic City Family Dentistry.
In 2020, Dr. Dinsmore married Dr. Jan Henley, who is also a dentist. He now has two additional family members, his step-sons Brad and Grant. Brad is a businessman and Grant is an MD.
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