What Causes Plaque on Teeth: How It Forms & Spreads?

Tooth Decay
Close-up showing dental plaque buildup on teeth

by Malavi Sivakanesan • 5 March 2025 • 5 min read

Dental plaque is colourless (or sometimes pale yellow) and is a sticky film that starts forming on the teeth due to excessive bacterial accumulation. It can make your teeth feel fuzzy. Plaque becomes even more noticeable if you do not brush daily or properly. Even though it has no colour, your teeth can look discoloured or yellowish when food particles stick to it. Understanding what causes plaque on teeth is the first step to preventing it.

What Causes Plaque?

Before we shed lights on the causes, you must be wondering what does tooth plaque look like? It is a thin layer that is transparent, white, or sometimes pale yellow. Speaking about the reasons that cause of plaque on teeth, they are plenty.

Please note that severe cases may also need tooth removal and replacement. So, understand the leading causes of plaque build-up:

  • This biofilm develops if you consume food items that contain carbohydrates, i.e. starches and sugars. These food items include candies, soft drinks, bread, raisins, etc. You will be shocked to know that the bacteria in our mouth usually thrive on these food items. When food particles stick or are left uncleaned in the mouth, these gems will start accumulating plaque.
  • If you are someone who does not brush, floss, or clean his mouth regularly, you are more prone to developing this acidic film. Since poor hygiene is directly associated with dental issues such as plaque build-up due to excessive germs, you should opt for healthy oral hygiene habits such as brushing, flossing, etc.
  • When it comes to how does dental plaque form, you should know that it is formed by the teeth naturally as well. When you brush properly, it is removed easily. In case you do not brush daily or do not go for proper dental cleaning processes, including teeth whitening, this layer will become thick and cause so many issues.

What are the Complications Attached to Dental Plaque?

Dental plaque produces a certain type of acid. When you leave the dental plaque untreated, it will start attacking the teeth’s enamel. Over time, enamel will be destroyed and cause cavities and decay. Besides, it has several complications when not opted for preventative dentistry solutions:

  • Tarter development (excessively hard plaque)
  • Gum diseases such as gingivitis
  • Bad breath
  • Swollen, red, and bleeding gums
  • Tooth infection
  • Tooth abscess

Useful Tips to Prevent Plaque on Teeth

Regular dental cleanings, flossing, brushing, etc., are needed if you want to remove already accumulated dental plaque. In case you want to prevent it, you should do the following:

  • Gently brush your teeth with a soft-bristled brush.
  • Always hold the brush at 45 45-degree angle to clean the entire mouth.
  • Brush your teeth for at least 2 minutes with a toothpaste containing fluoride.
  • Floss your teeth after every meal to remove the particles between teeth.
  • You can use dental picks, dental floss, water flossers, etc. for this purpose.
  • Rinsing your mouth with an antiseptic and antibacterial mouthwash is necessary.
  • It will reduce the chances of growth germs that cause plaque.
  • Schedule your dental check-ups in every 5-6 months to rule out any dental issue.
  • Limit or completely stop eating sugary, sticky, and acidic food items and drinks.
  • Avoid or limit smoking and alcohol consumption.
  • You can try teeth whitening if your tooth has become discoloured because of plaque.

Closing Remarks

Dental plaque is quite common. However, immediate attention is needed to prevent the build-up or remove the accumulated ones. Although regular dental checks can reduce the chances of such issues, you can also follow a health oral hygiene regimen to keep dental plaque and related issues at bay.

Photo of Malavi Sivakanesan

Malavi Sivakanesan

Malavi Sivakanesan is the principal dentist and co-founder at Complete Smiles in Harrow, Greater London. She is responsible for establishing the Complete Smiles brand throughout the United Kingdom and Europe and has 5 successful practices under her strong leadership.