The Times Australia
The Times World News

.

What happens to teeth as you age? And how can you extend the life of your smile?

  • Written by Arosha Weerakoon, Senior Lecturer, School of Dentistry, The University of Queensland and General Dentist., The University of Queensland
What happens to teeth as you age? And how can you extend the life of your smile?

A healthy smile helps us[1] live long, well and happy lives. But just like our bodies[2], our teeth succumb to age-related changes.

So what happens to teeth as you age? And what can you do to ensure your smile lasts the distance?

First, what are teeth made of?

The tooth crown is covered by a hard enamel coat that surrounds softer, brown dentine, which protects a centrally located pulp.

Enamel is a complex weave of brittle[3], honeycomb-clustered strands that interact with light to make teeth appear opalescent (a pearly, milky iridescence).

Dentine under enamel[4] forms most of the tooth crown and root, and is made of collagen, mineral, water and proteins. Collagen strands are woven[5] to stretch and spring back, to prevent teeth[6] from cracking and breaking when we grind and chew.

Read more: Curious Kids: what is inside teeth?[7]

The pulp has blood vessels and nerves that communicate with the rest of your body.

Enmeshed in the dentine mineral and collagen are small, interconnected tubules[8] formed by specialised cells called odontoblasts[9] that settle around the pulp, once our teeth completely form.

Each tooth contains a finite number of odontoblasts[10], unlike the constantly replenished special bone cells that renew.

How do our teeth change as we age?

Unable to renew, our teeth become brittle[11], and prone to fracture as dentine loses its spring.

This is more common[12] in teeth with existing crack lines, large fillings or root canal treatments.

With time, the outer surface of enamel thins[13] to reveal the relatively opaque dentine that darkens as we age.

Here’s how a tooth starts out and how it changes with age. Journal of Structural Biology/Created with BioRender.com, Author provided (no reuse)[14]

The dentine darkens because the collagen weave stiffens and shrinks[15], and the fluid in the tubules fills with mineral[16].

The odontoblasts continue to form dentine inside the tooth to reduce the translucent pulp space. The increase in dentine makes our teeth appear opaque[17] and insulates from hot and cold sensations. This is why X-rays[18] are useful to detect cavities we may not feel.

Food and drink particles fill micro-gaps and age-related fine crack lines that run up and down enamel to discolour and stain[19]. These stains are easily managed by tooth whitening[20].

How else can you extend the life of your teeth and brighten your smile? Here are seven tips to avoid dental decline:

1. Avoid unnecessary forces

Avoid using[21] your teeth to hold things such as working tools or to open packaging.

Take measures to avoid forces such as grinding or clenching[22] by wearing a night guard.

If you have large fillings[23] or root canal-treated[24] teeth, speak to your dentist about specific filling materials or crowns[25] that can protect your teeth from cracking or breaking.

2. Share the load

If you are missing molars or premolars, distribute chewing forces evenly to prevent overloading your remaining teeth.

Replace missing teeth with bridges[26], implants[27] or well-fitted dentures[28] to support your bite. Get your dentures checked regularly[29] to ensure they fit and support adequately, and replace them at least every ten years.

3. Preserve your enamel

Reduce further enamel and dentine loss[30] by selecting soft-bristled tooth brushes and non-abrasive toothpastes[31].

Certain whitening toothpastes can be abrasive, which can roughen and wear[32] the tooth surfaces. If you are unsure, stick with toothpastes that are labelled “sensitive”.

Read more: How to brush your teeth properly, according to a dentist[33]

Reduce your exposure to acid[34] in food (think lemons or apple cider vinegar) or illness (reflux or vomiting) where possible to maintain enamel and prevent erosion.

4. Enhance your saliva

Saliva[35] protects against acid attacks, flushes our teeth, and has antibacterial properties to reduce erosion and decay (holes forming).

Saliva is also important to help us chew, swallow and speak.

But our saliva quality and quantity reduces because of age-related changes to our salivary glands as well as certain medications prescribed to manage chronic illnesses[36] such as depression and high blood pressure.

Speak to your doctor about other medication options to improve your saliva or manage reflux disease to prevent erosion.

Man looks at medicine bottle
Some medications can reduce your saliva production. Shutterstock[37]

5. Treat gum disease

Aesthetically, treating gum disease (periodontitis)[38] reduces gum shrinkage (recession) that typically exposes the relatively darker tooth roots that are more prone to developing holes[39].

6. Manage and prevent senescence

Cellular senescence[40] is the process that changes DNA in our cells to reduce our ability to withstand physical, chemical or biological damage.

Cellular senescence enhances new cancer formation, the spread of existing cancers and the onset of chronic illnesses such as Alzheimer’s disease, diabetes, osteoporosis and heart disease.

You can prevent cell damage by managing lifestyle factors such as smoking, uncontrolled diabetes and chronic infections such as gum disease.

7. Adapt and ask for help

Ageing[41] can affect our cognition, hand dexterity and eyesight to prevent us from cleaning our teeth and gums as effectively as we once could.

If this describes you, talk to your dental care team. They can help clean your teeth, and recommend products and tools[42] to fit your situation and abilities.

Read more: Reform delay causes dental decay. It’s time for a national deal to fund dental care[43]

References

  1. ^ helps us (pubmed.ncbi.nlm.nih.gov)
  2. ^ like our bodies (pubmed.ncbi.nlm.nih.gov)
  3. ^ brittle (www.ncbi.nlm.nih.gov)
  4. ^ Dentine under enamel (onlinelibrary.wiley.com)
  5. ^ woven (www.sciencedirect.com)
  6. ^ prevent teeth (www.sciencedirect.com)
  7. ^ Curious Kids: what is inside teeth? (theconversation.com)
  8. ^ interconnected tubules (pubmed.ncbi.nlm.nih.gov)
  9. ^ odontoblasts (www.sciencedirect.com)
  10. ^ finite number of odontoblasts (pubmed.ncbi.nlm.nih.gov)
  11. ^ become brittle (www.sciencedirect.com)
  12. ^ more common (www.sciencedirect.com)
  13. ^ thins (www.sciencedirect.com)
  14. ^ Journal of Structural Biology/Created with BioRender.com (www.sciencedirect.com)
  15. ^ stiffens and shrinks (www.sciencedirect.com)
  16. ^ fills with mineral (www.sciencedirect.com)
  17. ^ opaque (www.sciencedirect.com)
  18. ^ X-rays (www.sciencedirect.com)
  19. ^ discolour and stain (www.researchgate.net)
  20. ^ tooth whitening (www.sciencedirect.com)
  21. ^ using (www.nature.com)
  22. ^ grinding or clenching (www.sciencedirect.com)
  23. ^ large fillings (www.sciencedirect.com)
  24. ^ root canal-treated (www.sciencedirect.com)
  25. ^ specific filling materials or crowns (onlinelibrary.wiley.com)
  26. ^ bridges (www.sciencedirect.com)
  27. ^ implants (aap.onlinelibrary.wiley.com)
  28. ^ dentures (www.mdpi.com)
  29. ^ checked regularly (www.sciencedirect.com)
  30. ^ further enamel and dentine loss (onlinelibrary.wiley.com)
  31. ^ tooth brushes and non-abrasive toothpastes (www.tandfonline.com)
  32. ^ roughen and wear (www.ncbi.nlm.nih.gov)
  33. ^ How to brush your teeth properly, according to a dentist (theconversation.com)
  34. ^ acid (www.nature.com)
  35. ^ Saliva (onlinelibrary.wiley.com)
  36. ^ manage chronic illnesses (pubmed.ncbi.nlm.nih.gov)
  37. ^ Shutterstock (www.shutterstock.com)
  38. ^ treating gum disease (periodontitis) (pubmed.ncbi.nlm.nih.gov)
  39. ^ prone to developing holes (journals.sagepub.com)
  40. ^ Cellular senescence (pubmed.ncbi.nlm.nih.gov)
  41. ^ Ageing (onlinelibrary.wiley.com)
  42. ^ recommend products and tools (www.magonlinelibrary.com)
  43. ^ Reform delay causes dental decay. It’s time for a national deal to fund dental care (theconversation.com)

Read more https://theconversation.com/what-happens-to-teeth-as-you-age-and-how-can-you-extend-the-life-of-your-smile-215786

Times Magazine

Headless CMS in Digital Twins and 3D Product Experiences

Image by freepik As the metaverse becomes more advanced and accessible, it's clear that multiple sectors will use digital twins and 3D product experiences to visualize, connect, and streamline efforts better. A digital twin is a virtual replica of ...

The Decline of Hyper-Casual: How Mid-Core Mobile Games Took Over in 2025

In recent years, the mobile gaming landscape has undergone a significant transformation, with mid-core mobile games emerging as the dominant force in app stores by 2025. This shift is underpinned by changing user habits and evolving monetization tr...

Understanding ITIL 4 and PRINCE2 Project Management Synergy

Key Highlights ITIL 4 focuses on IT service management, emphasising continual improvement and value creation through modern digital transformation approaches. PRINCE2 project management supports systematic planning and execution of projects wit...

What AI Adoption Means for the Future of Workplace Risk Management

Image by freepik As industrial operations become more complex and fast-paced, the risks faced by workers and employers alike continue to grow. Traditional safety models—reliant on manual oversight, reactive investigations, and standardised checklist...

From Beach Bops to Alpine Anthems: Your Sonos Survival Guide for a Long Weekend Escape

Alright, fellow adventurers and relaxation enthusiasts! So, you've packed your bags, charged your devices, and mentally prepared for that glorious King's Birthday long weekend. But hold on, are you really ready? Because a true long weekend warrior kn...

Effective Commercial Pest Control Solutions for a Safer Workplace

Keeping a workplace clean, safe, and free from pests is essential for maintaining productivity, protecting employee health, and upholding a company's reputation. Pests pose health risks, can cause structural damage, and can lead to serious legal an...

The Times Features

The Role of Your GP in Creating a Chronic Disease Management Plan That Works

Living with a long-term condition, whether that is diabetes, asthma, arthritis or heart disease, means making hundreds of small decisions every day. You plan your diet against m...

Troubleshooting Flickering Lights: A Comprehensive Guide for Homeowners

Image by rawpixel.com on Freepik Effectively addressing flickering lights in your home is more than just a matter of convenience; it's a pivotal aspect of both home safety and en...

My shins hurt after running. Could it be shin splints?

If you’ve started running for the first time, started again after a break, or your workout is more intense, you might have felt it. A dull, nagging ache down your shins after...

Metal Roof Replacement Cost Per Square Metre in 2025: A Comprehensive Guide for Australian Homeowners

In recent years, the trend of installing metal roofs has surged across Australia. With their reputation for being both robust and visually appealing, it's easy to understand thei...

Why You’re Always Adjusting Your Bra — and What to Do Instead

Image by freepik It starts with a gentle tug, then a subtle shift, and before you know it, you're adjusting your bra again — in the middle of work, at dinner, even on the couch. I...

How to Tell If Your Eyes Are Working Harder Than They Should Be

Image by freepik Most of us take our vision for granted—until it starts to let us down. Whether it's squinting at your phone, rubbing your eyes at the end of the day, or feeling ...