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Hairline Crack in Denture Plate: What Causes It and How to Fix It

Dentures play a vital role in daily comfort and confidence, but even a minor crack can disrupt everything. What causes it? Is it fixable? In this blog, we’ll explore the reasons behind these subtle fractures, what steps to take when they appear, and how to keep your dentures strong and reliable for years.

Causes of Hairline Crack in Denture Plate

A denture plate is not indestructible. Over time, wear and daily habits can lead to a hairline crack in denture plate. These small splits often start unnoticed but can grow rapidly if left unaddressed.

Here’s why a denture might start to crack:

  • Long-term wear and tear: Dentures endure a lot each day. Biting, chewing, and even cleaning them can slowly weaken the material over time.
  • Improper fit: If your dentures don’t fit properly, pressure is spread unevenly. One side may take more force than the other, leading to small fractures.
  • Material stress: Most denture plates are made from acrylic. While durable, they can still crack under sudden pressure or drops.
  • Dry mouth: Saliva helps cushion the impact between dentures and gums. A dry mouth creates more friction, which may lead to a crack.
  • Sudden trauma: Dropping dentures in the sink or on the bathroom floor can cause instant damage, especially to the corners or edges.

You may not notice a crack at first. It might start with a tiny ridge, a rough spot, or a feeling that something’s just “off.” That’s your signal to take a closer look.

Common Reasons Why Bottom Dentures Break in Half

Lower dentures, in particular, face some unique challenges. They’re thinner, rest on a moving jaw, and deal with tongue pressure. These factors increase their risk.

Let’s look at what makes bottom dentures more likely to break:

  • Biting pressure: The bottom jaw moves a lot when you talk, chew, or swallow. All that motion can wear the denture plate unevenly.
  • Less suction: Unlike upper dentures that cling to the roof of the mouth, lower dentures often rely on gravity and fit alone. That makes them more likely to shift or stress.
  • Improper support: If the lower jawbone has shrunk (which happens with age), dentures may no longer fit snugly. This can lead to bending and cracking.
  • Clenching or grinding: Many people grind their teeth without realizing it. That grinding creates pressure points that weaken the denture plate.

When a bottom denture breaks clean in half, it’s usually a sign of both long-term wear and sudden stress.

Immediate Steps to Take After Your Denture Breaks

It can be alarming to discover your denture cracked, but stay calm. There are safe steps you can take right away.

Here’s what to do:

  • Stop using the broken denture: Even if it seems minor, avoid wearing it. You could worsen the damage or hurt your gums.
  • Gather all the pieces: If the denture has split, carefully collect the parts. Keep them clean and dry in a soft container.
  • Do not try to fix it yourself: Glues or superglue can damage the material. They might also make proper repair impossible later.
  • Call your dentist: Explain what exactly happened and ask for the soonest available repair appointment.

If you’re in need of partial and full dentures in Portland, OR, a quick call to a trusted dental office will get the process started.

When to See a Dentist for a Denture Repair or Replacement

Not every crack requires a full replacement. A dentist can often fix a minor split with bonding or rebonding. However, it’s important to act fast.

You should see a dentist if:

  • The denture has visible damage
  • It no longer fits comfortably.
  • You feel pain when wearing it.
  • There’s a full or partial break.

Dentists use tools and materials that match the strength and shape of your original denture. Our team takes pride in quick turnarounds and long-lasting results.

Sometimes, the damage is too extensive. In that case, your dentist may recommend starting fresh. That gives you a secure, well-fitting denture that lasts for years.

How to Prevent Your Bottom Denture from Breaking Again

Prevention starts with good habits and regular check-ins. Even the best dentures need care and support to last.

Here’s how to reduce the chances of future damage:

  • Handle with care: When cleaning your dentures, do so over a folded towel or a sink filled with water. That soft landing could save them if they slip.
  • Store them properly: Always place dentures in water or a mild soaking solution when not in use. This keeps the material from drying out and becoming brittle.
  • Visit your dentist regularly: A twice-yearly visit helps catch small problems before they become big ones. Your dentist in Portland, OR, can adjust fit, check bite pressure, and spot signs of wear.
  • Don’t ignore discomfort: If your denture feels loose or painful, say something. Small fit issues can turn into big breaks.
  • Avoid hard or sticky foods: Chewing on tough items like ice, nuts, or taffy can add pressure where you don’t want it.
  • Use a soft brush for cleaning: Scrubbing too hard with firm bristles can scratch the surface and create weak spots.

In case you usually grind your teeth, ask your dentist about a nighttime mouthguard to safeguard your dentures while you sleep.

Final Thoughts

A crack in your denture is fixable—but timing is everything. Don’t ignore the warning signs. Take control of your comfort and oral health today. Schedule your repair or consultation with Pham Dental Care, where your smile gets the best care it deserves. Let us help you feel confident, comfortable, and ready to smile again, without delay.

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