Caring for Your Crowns: Flossing and Brushing Around Them
Having a dental crown fitted is an investment in your oral health, and like any investment, it is worth protecting. Although the crown material itself cannot develop decay, the natural tooth underneath and the gum tissue surrounding the crown are still vulnerable to the problems that affect any tooth — plaque build-up, gum disease, and decay at the margin where the crown meets the tooth. The good news is that caring for a crown requires nothing more complicated than a thorough and consistent daily routine, combined with regular visits to your dentist.
Many patients are uncertain whether they can brush and floss as normal once a crown has been placed, or whether they need to take special precautions. The answer is straightforward: yes, you should brush and floss around your crown just as you would any other tooth, though technique matters. The NHS emphasises that brushing teeth twice a day with fluoride toothpaste and cleaning between teeth daily is the foundation of good oral health, and this applies just as much to crowned teeth as to natural ones. You can read more about general tooth-cleaning guidance on the NHS dental treatments page.
Brushing Around a Crown
Brushing a crowned tooth is essentially the same as brushing any other tooth, but there are a few points worth keeping in mind. Use a soft-bristled toothbrush rather than a medium or hard brush, as harder bristles can gradually wear at the gum margin and are no more effective at removing plaque. Hold the brush at roughly a 45-degree angle to the gumline so that the bristles can sweep along the base of the crown and into the sulcus — the tiny groove between the tooth and the gum — where bacteria tend to collect.
Use small, gentle circular motions rather than a harsh scrubbing action. Aggressive brushing does not clean more effectively; it simply puts unnecessary force on the gum tissue. Spend at least two minutes brushing in total, ensuring that you cover all surfaces — front, back, and biting surface — of every tooth in your mouth, including the crowned one. Electric toothbrushes are an excellent option as they maintain the correct speed and motion consistently, which can be particularly helpful if manual dexterity is a challenge.
Flossing Around a Crown
Flossing around a crown requires slightly more care than flossing between natural teeth, particularly at the point where the crown meets the gumline. When you floss, guide the thread gently between the crown and the adjacent tooth using a back-and-forth motion, but take care not to snap the floss into the gum. Once the floss is between the teeth, curve it into a C-shape around the base of the crown and slide it gently up and down to remove plaque from the side surfaces of the tooth and crown margin.
When removing the floss, slide it out sideways rather than pulling it upward through the contact point with force, especially if you have a crown on a bridge where the floss could dislodge the restoration if removed abruptly. If standard floss is difficult to use, there are several alternatives that can make the job easier:
- Floss threaders: A small plastic loop that allows you to thread floss beneath bridge work or under tight contacts. Particularly useful for cleaning under the pontic of a bridge.
- Interdental brushes: Tiny bottle-brush-shaped tools available in various sizes that clean between the teeth and alongside the gumline. Many people find these easier and more comfortable than conventional floss.
- Water flossers: Devices that use a pressurised stream of water to flush debris and plaque from between teeth and around crowns. A good supplementary tool, though not a complete replacement for floss or interdental brushes.
- Dental tape: A flatter, wider form of floss that some patients find easier to manipulate around crowns, particularly where teeth are closely spaced.
The Importance of the Crown Margin
The margin is the point where the edge of the crown meets the surface of the natural tooth, usually at or just below the gumline. This is the most vulnerable area in terms of decay, because any bacteria that penetrate the margin can reach the underlying tooth structure. Plaque and tartar are most likely to accumulate at this junction if cleaning is inadequate. Keeping the gumline clean through thorough brushing and flossing is the best way to protect the margin and prevent the development of secondary decay, which could eventually compromise the crown and require further treatment.
If you notice any sensitivity, discolouration, or a feeling that the gum is receding around a crowned tooth, it is worth mentioning this to your dentist at your next check-up. In some cases, a small area of exposed root becomes visible over time, which can make the margin more susceptible to sensitivity and wear.
Toothpaste and Mouthwash Recommendations
Use fluoride toothpaste with a strength of at least 1,350 ppm for adults, as fluoride is essential for protecting the natural tooth structure beneath and adjacent to the crown. Avoid highly abrasive whitening toothpastes, as these can wear away the glaze on ceramic crowns over time, dulling their appearance. A fluoride mouthwash used at a separate time from brushing — for example, after meals — can provide additional protection to the margins and surrounding teeth.
Daily Crown Care Summary
| Task | Frequency | Tool |
|---|---|---|
| Brushing all tooth surfaces | Twice daily (morning and before bed) | Soft-bristled toothbrush + fluoride toothpaste |
| Cleaning between teeth and crown margins | Once daily | Floss, interdental brush, or water flosser |
| Rinsing with fluoride mouthwash | Once daily (separate from brushing) | Fluoride mouthwash |
| Professional clean and check-up | Every 6–12 months as advised | Dentist or hygienist |
Foods and Habits to Avoid
While crowns are durable, certain habits can shorten their lifespan. Avoid chewing on very hard foods such as ice cubes, hard boiled sweets, or the shells of nuts, as these can crack or chip porcelain and ceramic crowns. If you grind your teeth at night — a condition known as bruxism — discuss this with your dentist, as a custom-made nightguard can protect both your natural teeth and your crowns from excessive wear forces.
Sticky foods such as toffee and chewing gum can occasionally pull at a crown if the cement seal is not perfect, so it is worth being cautious with these, particularly in the first few weeks after a new crown has been fitted. If you notice that a crown feels loose or comes away from the tooth, contact your dentist promptly to have it recemented before bacteria have a chance to penetrate the underlying tooth.
Why Professional Cleaning Still Matters
Even the most diligent home care routine cannot remove calculus — the hardened mineral deposit that forms when plaque is left in place for extended periods. Only professional scaling by a dentist or hygienist can remove calculus once it has formed. During your regular check-up, your dentist will also examine the condition of any crowns, check the margins for signs of secondary decay, and assess the health of the surrounding gum tissue. Catching any issues early invariably means simpler and less costly treatment.
Diet and Lifestyle Choices That Affect Crown Longevity
What you eat and drink can make a meaningful difference to how long your crown lasts and how good it looks over time. Acidic foods and drinks — including citrus fruits, fruit juices, carbonated drinks, and vinegar-based condiments — can gradually erode the enamel of natural teeth and also affect the surface of ceramic and porcelain crowns if consumed very frequently. Drinking water or rinsing the mouth with water after acidic food or drink helps to neutralise the acid and reduce its effect.
Highly pigmented foods and drinks such as coffee, tea, red wine, curries, and berries can stain the surface of ceramic crowns over time, particularly if the glaze becomes worn or scratched. Keeping the crown surface clean and smooth through regular gentle brushing is the best defence against staining. Note that tooth whitening treatments have no effect on the colour of existing crowns — if you plan to whiten your natural teeth, discuss this with your dentist first so that any crowns can be matched to your desired final shade if replacement is being considered.
Our team at Gorgie Road Dental Practice is always happy to advise on the best techniques for looking after your crowns, and we offer hygiene appointments for professional cleaning and personalised oral health advice. If you have any concerns about your crown or would like to book a routine appointment, please call us on 0131 337 3936 — we would love to help.