By ADITI MISHRA
Research on the effects of cranberry juice on dental plaque and how a liquid treatment can help prevent some cavities. Plus, an Orthodontist explains the difference between tartar removal and teeth whitening.
But the real question is: what do the findings reveal about daily dental care?
According to News Medical, a study carried out found that pure cranberry juice could help inhibit the growth of bacteria in dental plaque and reduce acid production. This study took place on the 21st October 2026.
The study, led by Christine Wu from the University of Illinois Chicago College of Dentistry, included 22 individuals. 14 children and 8 adults. They were given either unsweetened 100% cranberry juice or a cranberry drink containing 27% juice plus added sugar or water.
Plaque samples were taken and compared. Those samples that had been given pure cranberry juice had inhibited bacterial growth, and less acid was produced. This acid can cause damage to the enamel of your teeth and lead to cavities.
Another study, published in Biomedicines in December 2025, looked at the potential benefits of cranberries regarding dental health. Researchers analyzed 93 studies and found that cranberry compounds did show potential when managing bacteria, plaque, and inflammation. However, most of the studies were laboratory-based, and there were far fewer human studies. This study does not prove that drinking cranberry juice will help prevent cavities. The sample size was small, and it looked at the short-term effects. More research would be required to see if this can help reduce the risk of tooth decay. This study does not apply to all cranberry drinks. The study looked at unsweetened pure juice. It should not be used as a replacement to brushing with fluoride toothpaste. Cranberry juice should not be seen as a replacement for good dental hygiene.
A clinical trial found that silver diamine fluoride (SDF) can help prevent some cavities from worsening. This was reported on the 25th October 2026 by ScienceDaily. The study, led by researchers from the University of Michigan, looked at 830 children under 6 years old. They found that applying 38% SDF solution every 6 months helped stop decay in more than half of the baby teeth. The liquid is applied directly onto the cavity by a dentist using a small tool. This takes just seconds to do and does not involve any drilling, injections, or sedation. The silver helps manage the bacteria that cause tooth decay, and the fluoride helps protect the tooth.
This can be useful for young children who struggle to attend dental appointments. However, it will leave the decayed area permanently darker. It does not replace any lost tooth structure. Some patients may require a filling or other treatment. A dentist will need to decide if this is suitable for you. The findings could help to gain approval from the US Food and Drug Administration due to its ability to stop tooth decay. In the USA, it has previously been approved for treating tooth sensitivity.
According to AS USA, orthodontist Almudena Herraiz explained in a TikTok video that tartar removal and teeth whitening have different purposes.
Plaque is a layer of bacteria that builds up on teeth. If it is not removed, it can harden into tartar. Brushing cannot remove hardened tartar, so a dental professional must remove it during a cleaning. After this cleaning, teeth may look cleaner and lighter because the deposits have been removed. However, the procedure does not change the natural colour of the teeth.
Teeth whitening is a cosmetic treatment that makes teeth look lighter. It does not remove tartar or treat gum disease.
Herraiz recommends professional cleaning at least once a year, while the need for whitening depends on the individual. She also warned that tartar buildup can contribute to gum disease and damage the bone supporting the teeth.
The research on cranberries shows potential benefits to plaque bacteria. However, many more human studies will be required to prove that cranberry juice can help prevent cavities. The trial on SDF provides evidence that a liquid can help prevent some cavities from worsening. Herraiz explains why cleaning is not the same as whitening.
Brush your teeth twice a day using fluoride toothpaste, floss, and visit your dentist regularly. Do not rely on cranberry juice to prevent tooth decay. Not all cavities can be treated without drilling. If you are experiencing any tooth pain, sensitivity, or bleeding gums, visit your dentist to find the correct treatment.
(Rh/AM)
