Why Your Teeth Are Shifting, Shrinking, and Changing The Shape Of Your Face After 40 with Dr. Erin Sheffield

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Dr. Mary Alice Mina sits down with oral and maxillofacial surgeon Dr. Erin Sheffield to explore a part of facial aging most people never think about: the mouth. They dig into why tooth loss drives bone loss in the jaw, why flossing (done correctly) is one of the highest-impact, lowest-cost things anyone can do for their whole-body health, and why teeth keep shifting throughout life even without braces history. The conversation also covers grinding and mouth guards, the risks behind the veneer and crown boom, why a slightly imperfect natural smile beats an artificially uniform one, safe teeth-whitening practices, and how perimenopause, dry mouth, and osteoporosis medications can quietly affect oral health. Dr. Sheffield also busts viral myths around wisdom teeth, cavitations, and jaw-growth looksmaxing trends, and explains what orthognathic surgery actually involves. She closes with her top two low-effort, high-yield habits for protecting oral health through midlife.

In this episode: 00:00 — Intro02:05 — Topic introduction: facial aging and bone structure02:50 — Dr. Sheffield introduces her background and work05:15 — Doctors navigating social media and content creation08:15 — How tooth loss drives jawbone and facial structure loss11:15 — Flossing: why it matters and the correct technique15:20 — Teeth shifting with age, Invisalign, retainers, and the wisdom teeth myth19:30 — Teeth grinding, mouth guards, and Botox for masseters22:30 — Cosmetic dentistry trends: veneers versus crowns26:30 — Natural smiles versus the uniform whitening trend30:30 — Is teeth whitening safe33:00 — Perimenopause, dry mouth, and osteoporosis medication risks (MRONJ)37:00 — Busting wisdom teeth myths39:00 — Jaw looksmaxing, mewing, and orthognathic surgery41:30 — Final tips: flossing and fluoride toothpaste42:20 — Where to find Dr. Sheffield42:45 — Closing thoughts

Want a deeper look? Watch the full episode on YouTube for a more visual experience of today’s discussion. This episode is best enjoyed on video—don’t miss out!

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About The Guest:

Dr. Erin Sheffield is a board-certified oral and maxillofacial surgeon, speaker, educator, entrepreneur, and content creator who has built a career around doing things a little differently. After more than a decade practicing oral surgery, Erin has built a platform that combines clinical education, humor, and a willingness to say the things people in medicine and dentistry are often thinking but don’t say out loud. Her content has reached millions, connecting with both patients and healthcare professionals through myth-busting, education, and candid conversations about life in medicine. Her own career hasn’t followed a perfectly straight path. Losing her first job shortly after returning from maternity leave forced her to rethink achievement, identity, and what a meaningful career could look like. Today, she is the founder of The Doctor Is All In, a retreat and community helping women physicians and dentists stop disappearing inside achievement and come home to themselves. Erin is also a wife, mom of three, and self-described recovering overachiever.