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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