Porcelain does not decay. That is true — but incomplete. Your own tooth is still under the crown, and the margin where the crown meets the gum is one of the easiest places for plaque to gather. Most problems with a crowned tooth start at that margin, not in the porcelain.
The one thing that changes day to day
Your brushing routine stays the same: soft brush, twice a day, two minutes. What changes is cleaning between the teeth — and with crowns, neglecting it costs more.
- Use floss or an interdental brush once a day — especially along the crown margins
- With a bridge, superfloss or a water flosser makes that area much easier to reach
- Avoid abrasive “whitening” pastes; over time they dull the polish on porcelain
- If the gum starts to bleed, do not treat that as normal — it needs looking at
What to avoid
Porcelain is hard but brittle: it takes pressure well and sudden impact badly. So your teeth should not be used as tools. Chewing ice, cracking nutshells, opening bottles or biting through thread are the habits that lead to cracks.
If you clench or grind in your sleep, a night guard matters. The habit puts constant, uncontrolled load on the restorations through the night, and the guard spreads that load. It is the quietest thing that shortens a crown’s life.
Temporary sensitivity to hot and cold in the first weeks is normal and usually settles. Sensitivity that begins months later, or keeps increasing, points to something else and should be reported without waiting.
Check-ups
If the treatment was done abroad, your routine check-ups can be carried out at home. Keep your treatment records, the details of the materials used and your X-rays to hand — your own dentist can work from those.
A professional clean every six months is the only way to remove the hardened plaque that builds at crown margins and does not come off with a brush. Those ten-to-fifteen-year service life figures apply to patients who keep that up.
The right brush and the right paste
A hard brush does not clean better; it only pushes the gum back. In a restored mouth that costs more, because a receding gum exposes the margin and turns it into a visible line. A soft brush is enough.
Electric brushes, especially models with a pressure warning, give most people more consistent results than manual brushing — because the real problem is controlling time and pressure.
With toothpaste, what matters is abrasiveness. Most pastes labelled “whitening” work by abrasion rather than chemistry. Porcelain will not lighten anyway; those pastes simply dull the surface glaze over time.
When to see the dentist
Some signs should not wait. Most problems with a restoration are solved with something simple when caught early; left alone, the tooth underneath goes at risk too.
- Movement in the restoration, or a change in how it feels when you bite
- Floss catching at the margin — the edge may have broken down
- Darkening at the margin, or a grey line appearing
- Sensitivity that starts months later, or keeps increasing
- Redness, swelling or bleeding in the gum that does not settle
- A visible crack or chip in the porcelain
If your treatment was done abroad, photograph anything you notice and send it to your coordinator first. Most situations can be assessed and directed remotely — you do not need to travel for every issue.
The night guard: the most ignored advice
Clenching in your sleep goes unnoticed by most people. The clues are a tired jaw in the morning, headaches around the temples, or waking with your jaw locked. If a partner hears grinding, that is the clearest sign of all.
The habit puts load on restorations all night — far higher and less controlled than chewing. A good share of fractured restorations trace back to it: not an accident, but accumulated fatigue.
A night guard is cheap, simple and entirely reversible. It is the lowest-cost way to protect new restorations — so if your dentist suggests one, take it seriously.
Can a crowned tooth still decay?
The porcelain cannot decay, but the natural tooth beneath it can. Decay typically starts at the margin where the restoration meets the gum. That is why cleaning between the teeth matters even more in a restored mouth — a brush does not reach there.
What should I do if a restoration comes off?
Keep the piece rather than throwing it away — in many cases it can be re-bonded. Do not try to fix it yourself with household adhesives. The exposed tooth may be sensitive, so avoid chewing on that side and see a dentist as soon as you can.