Welcome to Our Practice
At House Mountain Dentistry, you are our top priority. We work hard at providing the excellent full-service dental care you and your family deserve in a relaxed atmosphere. We are now open in two locations, Maynardville and Blaine, for your convenience. We combine the latest dental technology with a professional and compassionate staff. We love our patients, and we are passionate about what we do. The result is your healthy, beautiful smile.
Doctor John Osborn
Dr. John Osborn grew up in Asheville, NC, where his father practiced dentistry for 50 years. Upon graduating from the University of Tennessee, Chattanooga, and Meharry Medical College of Dentistry, he began his practice in Maynardville, TN.
Dr. John has served as President of the Second District Dental Association and as President of the Tennessee Dental Association. He is a Fellow in the Academy of Dentistry International, the International College of Dentists, the American College of Dentists, and the Pierre Fauchard Academy. Dr. John also serves as the Director of Dental Services for Remote Area Medical.
He and his wife Laurel enjoy their farm in Union County and have three sons. Son, Andrew Osborn, DDS, joined his father in practice in 2018 and son, Thomas Osborn joined the practice in 2021 as an administrative associate. Dr. John enjoys flying, and motorcycling in his spare time.
Doctor Andrew Osborn
Dr. Andrew Osborn grew up in Knoxville, studied at the University of Tennessee, Chattanooga and received his Doctor of Dental Surgery degree from Meharry Medical College of Dentistry in 2018.
He is a volunteer dentist with Remote Area Medical, and Volunteer Rescue Ministries. Andrew married his college sweetheart Erin, a Nurse Practitioner in Knoxville. They are proud parents of son Noah. Dr. Andrew enjoys playing the guitar, building watches, and tinkering with mechanical parts.
Doctor Nathan Robertson
Dr. Nathan Robertson is a Sevierville native who grew up on his family farm. He earned his bachelor's degree from Carson-Newman University before receiving his Doctor of Medicine in Dentistry from Lincoln Memorial University College of Dental Medicine.
Outside of the office, Dr. Nathan enjoys spending time with his wife, Ashley, and their two cats, Root Canal and Gelpi. He also enjoys hiking, hunting, fishing and exploring the outdoors.
Dr. Robertson is passionate about providing compassionate, high-quality dental care and creating an environment where patients feel comfortable, cared for, and confident in their smiles.
Our Dental Hygienists
Our hygienists are committed to help you maintain optimal oral health through routine cleanings and dental visits. They are all licensed to give local anesthesia for pain management. They support you in achieving your goals for health, comfort, and a beautiful smile.
Sydnie Brown, RDH
Sydnie Brown graduated from Lincoln Memorial University in 2026 with a degree in Dental Hygiene and a strong passion for promoting oral health. She strives to build meaningful relationships with her patients and create a comfortable welcoming environment where they feel confident in their care. Outside of the office, Sydnie enjoys spending time with her husband and their dogs.
Leslie Stratton
Leslie Stratton graduated from East Tennessee State University in 2006 with a Bachelor of Science in Dental Hygiene. She joined our practice in 2020. Leslie and her husband and four children enjoy spending time with friends and family, and the family puppies.
Stephanie Long
Stephanie Long graduated from Roane State Community College in 2015 with her degree in dental hygiene. Before returning to school to pursue her passion for dental hygiene, she spent 8 years as an orthodontic dental assistant where she gained valuable experience and a strong foundation in patient care. Outside the office, Stephanie is a proud mom of two active kids who keep her busy with sports and activities. Most of her free time is spent cheering them on from the sidelines and making memories with her family.
SaraAnn Vance
SaraAnn Vance joined our practice in 2024 upon her graduation from Lincoln Memorial University. She brings enthusiasm, humor, and a passion for your dental health to our team. She and her husband enjoy the outdoors with her fur babies.
Our Dental Assistants
The primary goal of our dental assistants is to make you comfortable, to respect your time, and to maintain the highest level of infection control. All of our assistants are licensed to monitor nitrous oxide sedation, coronal polish, and apply dental sealants. They are excellent at answering your questions regarding treatment concerns.
Grace Helton, RDA
Grace Helton joined our practice in 1992. She enjoys her profession, meeting new people, and helping people reach their goals for a healthy, beautiful smile. She has a son and a daughter & is a grandmother of two. She loves being outside, gardening, doing lawn work, and even pulling weeds. She loves her family and her fur babies.
Robyn Long, RDA
Robyn Long joined our practice in 2018 and shares a high level of efficiency and software knowledge. She enjoys life with her son and nephew and in her spare time has large and small craft projects on which she is working.
Donna Coffey, RDA
Donna Coffey joined our practice in 2022, bringing with her expertise acquired since 1989. She loves her profession and brings a calming spirit to the most anxious patients. She and her husband are blessed with two children and three grandchildren. She enjoys hunting, fishing, and spending time with her family.
Brie Ogle, RDA
Brie Ogle joined our practice in 2025 after graduating from Dental Assisting School. She is currently studying a Pellissippi State Community College completing her prerequisites toward becoming a dental hygienist. She will be applying to dental hygiene programs imminently. In her free time, she loves spending time with her friends and family!
Our Business Administrative Team
Our administrative team will greet you upon your first phone call. They are adept at answering your questions, scheduling appointments, helping you understand your insurance benefits, filing your insurance claims, and discussing payment options.
Vicky Johnson, RDA
Vicky Johnson began her dental career in 1980 while in Florida as an Expanded Function Dental Assistant. She has a Certification in Dental Insurance and Dental Administrative Management. She joined our team in 2022. She and her husband enjoy motorcycle trips, reading, baking, and camping. They have a family of fur babies near and dear to their hearts.
Thomas Osborn
Thomas Osborn joined our team in 2021. He has become an indispensable member of our administrative team with his accommodating disposition. In his spare time, he is passionate about playing guitar on weekends in the band, Smooth Sailor. He just recently married his beautiful bride. And for all who question: no, he is not Dr. Andrew’s twin, just his brother!
Hanna Carver
Hanna Carver joined our team in 2023 and has been in office administration since 2013. She brings a cheerfulness, organization, and efficiency to our practice. She and her husband have 3 daughters. They also enjoy their 3 mini pigs, 3 dogs, a cat, and chickens.
Full service dentistry including:
Root canals
Extractions
Partials / Dentures
Implant restoration
Sleep apnea devices
Crown and bridge work
Invisalign
Office Hours
Maynardville
Monday: 9am - 5pm
Tuesday: 9am - 12pm
Thursday: 9am - 5pm
Friday: 8am - 3pm
Blaine
Tuesday: 9am - 5pm
Wednesday: 9am - 5pm
Thursday: 9am - 5pm
Accepted methods of payment:
Care Credit cards
All major credit cards
Insurance:
Most major insurances accepted. Through the Connection Dental network, we are IN NETWORK with Aetna, Cigna, Dentamax, GEHA, Guardian, Metlife, and United Healthcare among others.
We are not in network with TENNCARE (Amerigroup, Blue Care, Wellpoint, etc) or United Healthcare Dual Complete or Community Plan.