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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.

Photo of John Osborn.

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.

Photo of Andrew Osborn.

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.

Debbie Long

Photo of Debbie Long.

Debbie Long has been with our practice as dental hygienist and clinical office manager since 1981 upon graduation from East Tennessee State University. Her passion for her patients and dentistry comes from three generations of dental professionals and educators. She volunteers for Remote Area Medical. In her spare time, Debbie and her husband enjoy the outdoors, especially hiking and boating with family, friends, and GRANDchildren.

Stephanie Long

Photo of Stephanie Long.

Stephanie Long began her dental career working as an orthodontic dental assistant for 8 years. She returned to school while becoming a mother and upon graduation from Roane State Community College joined our practice in 2015. She and her husband have two beautiful children. In her spare time, Stephanie enjoys spending time with family outdoors hiking, and at the lake, working out, running half marathons, and cooking.

Leslie Stratton

Photo of 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.

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

Photo of Grace Helton.

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

Photo of Robyn Long.

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

Photo of Donna Coffey.

Donna Coffey joined our practice in 2022, bringing us 33 years of experience. 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.

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

Photo of Vicky Johnson.

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

Photo of 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!

Kay Beeler, RDA

Photo of Kay Beeler.

Kay Beeler started her career as a dental assistant in 1985 in Maynardville. In 2008, she moved to office administration and full circle back our office in 2022. We are pleased to have her expertise at the Blaine office location. She and her husband, who live in the Gibbs community, have two adult children and are enjoying a new grandson.

Full service dentistry including:

  • Root canals
  • Extractions
  • Partials / Dentures
  • Implant restoration
  • Sleep apnea devices
  • Crown and bridge work
  • Invisalign

Office Hours


  • Monday: 9am - 5pm
  • Tuesday: 9am - 12pm
  • Thursday: 9am - 5pm
  • Friday: 9am - 5pm


  • Tuesday: 9am - 5pm
  • Wednesday: 9am - 5pm

Accepted methods of payment:

  • Most insurance
  • Care Credit cards
  • All major credit cards