Dental and oral bacteria have been linked to numerous chronic diseases throughout the body. Recent research indicates that thorough brushing and regular dental visits can also play a role in preventing strokes (1).

According to statistics from the World Stroke Organization (WSO), over 13 million people globally suffer from strokes each year, with one in four individuals experiencing a stroke in their lifetime. Surprisingly, up to 90% of these cases could be prevented through lifestyle changes such as adopting a healthier diet, increasing regular exercise, quitting smoking, and even improving oral hygiene practices (2).

In his recent doctoral dissertation in forensic medicine at the University of Tampere, Medical Licentiate Olli Patrakka examined the significance of oral bacteria, particularly viridans group streptococci, in stroke development. While these bacteria are normal mouth microbes, they can lead to serious illnesses like heart valve inflammation when entering the bloodstream, such as through inflamed gums during teeth brushing. (3).

Olli Patrakka suggests that these bacteria, attaching to tooth surfaces and initiating plaque formation, may similarly contribute to stroke and atherosclerosis development when entering arterial walls via the bloodstream during dental procedures or infections.

Poor oral hygiene is a risk factor for strokes

According to Patrakka, dental bacteria are present in the blood clots of stroke patients in about four out of five cases, with similar results yet to be reported. Blood clots were collected from stroke patients undergoing acute care in Tampere, Finland, for the study, along with samples from patients with symptomatic carotid artery stenosis used as endarterectomy tissues. (3).

Epidemiological studies have identified poor oral hygiene as an independent risk factor for strokes. Patrakka suggests that the inflammatory reaction induced by dental bacteria in atherosclerotic plaques could explicitly explain this connection.

The dissertation's findings are significant as they present new opportunities for stroke patient treatment development, Patrakka says. He also believes that the development of a vaccine may also be now feasible.

Patrakka stresses that while further research is necessary to establish causality, the study supports the importance of oral health, particularly in individuals at risk of srokes. He emphasizes that considering the inflammation caused by streptococcal bacteria in the mouth is crucial in stroke prevention as part of routine dental care. Moreover, investigating the potential benefits of timely antimicrobial treatment or bacterial vaccines in the future is essential.

Periodontitis is the root cause of many ailments

Studies show dental plaque bacteria are responsible for about 95 per cent of oral diseases. One of the most common oral diseases is periodontitis, a severe gum disease caused by dental plaque. Early signs of this disease include red gums, gum bleeding, and bad breath. (4)

In patients with periodontitis, the fibres that attach the tooth to the gum are destroyed, forming a periodontal pocket between the gum and the tooth. This pocket may expand around the entire tooth. If the infection is not treated promptly and oral hygiene is not improved, it can progress to destroy more extensively the supporting tissues of the teeth and, ultimately, the jawbone. (4)

Thorough oral hygiene is crucial for the prevention and treatment of oral infections. According to the Oral Health Foundation one-in-four (26%) British adults regularly brush their teeth only once a day raising concerns about the number of people willing to skip twice-daily brushing. (5)

The charity is especially worried by the number of people who regularly fail to brush their teeth last thing at night, when the health of the mouth is most likely to deteriorate.  Insights from the research show that one-in-four (25%) do not brush their teeth in the evening before they go to bed. (5).

Deficiencies in oral hygiene are directly reflected in the statistics of oral infectious diseases. More than 45% of adults in the UK are currently being affected by gum disease. Meanwhile, 10% are living with the most severe form, which can lead to tooth loss. (6)

Thorough mechanical brushing of teeth and cleaning of the interdental spaces are crucial because even asymptomatic oral inflammations can affect the body's overall health. According to statistics, individuals with healthy mouths even live longer, research shows (7).

– Every missing tooth reduces life expectancy. This is talked about far too little, says Tommi Pätilä, a heart and transplant surgeon at HUS New Children's Hospital in Helsinki, Finland.

Pätilä is also one of the developers of the antibacterial Lumoral method. Lumoral is a medical device designed to improve oral hygiene and oral health. The antibacterial oral care method is especially suitable for patients with difficult-to-treat gum diseases such as periodontitis who do not get adequate results from traditional oral hygiene methods such as brushing teeth and cleaning interdental spaces. (8, 9, 10).

The effectiveness of the novel oral health enhancing device relies on antimicrobial photodynamic therapy (aPDT), also referred to as photoantimicrobial chemotherapy. While this technology is already prevalent in dental clinics, the advent of a home-use device allows for more frequent application of this antibacterial treatment. (11)

aPDT technology itself utilizes light energy and a photosensitizer to generate an antimicrobial effect that eliminates problem-causing plaque bacteria from the mouth. Due to its targeted approach aPDT does not lead to bacterial resistance. (11)

The importance of interdisciplinary collaboration

According to Pätilä, the recent medical dissertation at the University of Tampere holds significance as it integrates oral health into overall body health. Enhancing collaboration between doctors and dentists is crucial and needs improvement across various European countries. While many medical doctors already evaluate their patients' oral health at clinics and refer them for additional treatment when needed, closer collaboration is essential.

Diabetes serves as a prime example of a disease where the importance of underlying inflammations is widely acknowledged. However, heightened collaboration is necessary to accelerate diagnoses and even prevent several common diseases.

Olli Patrakka's interest in oral bacteria stemmed from his responsibilities as a pathologist. Has the interest of young doctors in the impact of dental infections on general health increased?

– It hasn't increased significantly, but it should. In my basic medical training about five years ago, there was minimal discussion of the impact of dental infections on overall health. While the topic is relatively new, it's crucial that awareness and scientific evidence grow over time.

Patrakka underscores the importance of general practitioners recognizing when a dental issue necessitates a referral to a dentist. This could streamline the treatment of oral infections and potentially aid in achieving a balance in treating various general diseases.

– My research contributes to the growing evidence that oral health significantly influences overall health. The blood vessels of the tooth pulp directly connect to the systemic circulation. Therefore, if teeth are in poor condition, bacteria and their byproducts can circulate directly into our bodies.

References:

1. Shahi S, Farhoudi M, Dizaj SM, Sharifi S, Sadigh-Eteghad S, Goh KW, Ming LC, Dhaliwal JS, Salatin S. The Link between Stroke Risk and Orodental Status-A Comprehensive Review. J Clin Med. 2022 Oct 2;11(19):5854. doi: 10.3390/jcm11195854. PMID: 36233721; PMCID: PMC9572898.
2. Sen S, Giamberardino LD, Moss K, Morelli T, Rosamond WD, Gottesman RF, Beck J, Offenbacher S. Periodontal Disease, Regular Dental Care Use, and Incident Ischemic Stroke. Stroke. 2018 Feb;49(2):355-362. doi: 10.1161/STROKEAHA.117.018990. Epub 2018 Jan 15. PMID: 29335336; PMCID: PMC5780242.
3. https://trepo.tuni.fi/bitstream/handle/10024/154588/978-952-03-3315-7.pdf?sequence=2&isAllowed=y
4. Saini R, Saini S, Sharma S. Biofilm: A dental microbial infection. J Nat Sci Biol Med. 2011 Jan;2(1):71-5. doi: 10.4103/0976-9668.82317. PMID: 22470238; PMCID: PMC3312703.
5. Mehrotra N, Singh S. Periodontitis. [Updated 2023 May 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK541126/
6. Oral health: What is gum disease? | British Dental Journal, Published 10 March 2017, Issue Date10 March 2017, DOI: https://doi.org/10.1038/sj.bdj.2017.196
7. Friedman PK, Lamster IB. Tooth loss as a predictor of shortened longevity: exploring the hypothesis. Periodontol 2000. 2016 Oct;72(1):142-52. doi: 10.1111/prd.12128. PMID: 27501497.
8. Pakarinen S, Saarela RKT, Välimaa H, Heikkinen AM, Kankuri E, Noponen M, Alapulli H, Tervahartiala T, Räisänen IT, Sorsa T, et al. Home-Applied Dual-Light Photodynamic Therapy in the Treatment of Stable Chronic Periodontitis (HOPE-CP)—Three-Month Interim Results. Dentistry Journal. 2022; 10(11):206. https://doi.org/10.3390/dj10110206
9. Nikinmaa S, Alapulli H, Auvinen P, Vaara M, Rantala J, et al. (2020) Dual-light photodynamic therapy administered daily provides a sustained antibacterial effect on biofilm and prevents Streptococcus mutans adaptation. PLOS ONE 15(5): e0232775. https://doi.org/10.1371/journal.pone.0232775
10. Nikinmaa S, Moilanen N, Sorsa T, Rantala J, Alapulli H, Kotiranta A, Auvinen P, Kankuri E, Meurman JH, Pätilä T. Indocyanine Green-Assisted and LED-Light-Activated Antibacterial Photodynamic Therapy Reduces Dental Plaque. Dentistry Journal. 2021; 9(5):52. https://doi.org/10.3390/dj9050052
11. Jao Y, Ding SJ, Chen CC. Antimicrobial photodynamic therapy for the treatment of oral infections: A systematic review. J Dent Sci. 2023 Oct;18(4):1453-1466. doi: 10.1016/j.jds.2023.07.002. Epub 2023 Jul 11. PMID: 37799910; PMCID: PMC10548011.

According to a report commissioned by the European Federation of Periodontology (EFP), 4.9 percent of global healthcare expenditure is allocated to treat preventable oral diseases such as gum inflammation, cavities, and tooth loss. A preventive approach to oral disease management can bring significant savings to societies, especially when interventions are targeted at economically vulnerable populations.

The "Time to put your money where your mouth is: addressing inequalities in oral health" report by the Economist Impact reveals that the combined prevalence of cavities and severe gum inflammation, periodontitis, has already exceeded the combined global prevalence of non-communicable diseases (NCDs) like mental health disorders, cardiovascular diseases, diabetes, chronic respiratory diseases, and cancers.

Preventive oral care saves money

The report introduces a new cost calculation model for oral disease prevention and treatment, estimating that preventable oral diseases consume approximately $357 billion annually from global healthcare budgets.

Preventable oral diseases affect too many people worldwide. Tooth decay affects over two billion individuals globally, while severe gum inflammation impacts over one billion people. Hence, the EFP report underscores the urgent need to improve global oral health.

Reducing risk factors threatening oral health, such as sugary diets, tobacco, and alcohol consumption, is recommended not only to reduce oral diseases but also to improve overall health and prevent non-communicable diseases.

The scientific evidence linking oral infections to overall health is growing continuously, emphasizing the importance of utilizing this knowledge more extensively among healthcare professionals.

For instance, a recent doctoral thesis from the University of Turku reveals that poor oral hygiene increases the risk of severe head and neck infections requiring hospitalization. The study's findings suggest that investments in oral health and dental care can reduce infection-related costs, complications, and even mortality.

The EFP emphasizes the clear link between oral and overall health, stressing the importance of prioritizing oral health in healthcare budgets and policies.

The report also introduces a framework detailing the progression of cavities from healthy teeth to severely decayed teeth, presenting preventive measures such as maintaining oral hygiene with fluoride toothpaste and implementing local fluoride treatments to prevent or slow down cavity development.

Lumoral: Support for Mechanical Brushing

Efficient oral self-care is crucial for preventing and treating cavities and gum diseases. However, as people age, maintaining oral hygiene can become challenging due to declining vision, memory, or motor skills.

The Lumoral method serves as a targeted solution against microscopic plaque in the mouth, enhancing the effectiveness of mechanical tooth brushing and interdental cleaning. Lumoral treatment eliminates Streptococcus mutans bacteria responsible for tooth decay and gingivitis bacteria.

Endorsed by dentists and the Dental Hygienists' Association in Finland, Lumoral is suitable for maintaining oral health, as well as treating and preventing oral diseases at home. Lumoral slows plaque formation and significantly reduces the amount of bacteria causing periodontitis on tooth surfaces and along the gum line.

Existing studies support Lumoral's efficacy, showing that while even the most effective electric toothbrushes remove only about 65% of harmful bacteria from teeth, Lumoral eliminates over 99% of biofilm bacteria.

Sources:

1. Pakarinen S, Saarela RKT, Välimaa H, et al. Home-applied dual-light photodynamic therapy in the treatment of stable chronic periodontitis (HOPE-CP)—three-month interim results. Dent J (Basel). 2022;10(11):206. doi:10.3390/dj10110206
2. https://www.suuhygienistiliitto.fi/suomen-suuhygienistiliitto-suosittelee-lumoralia/
3. Aggarwal N, Gupta S, Grover R, Sadana G, Bansal K. Plaque removal efficacy of different toothbrushes: a comparative study. Int J Clin Pediatr Dent. 2019;12(5):385-390. doi:10.5005/jp-journals-10005-1669 
4. https://www.efp.org/publications/special-publications/the-burden-of-caries-and-periodontitis/

Recent studies indicate that a vegetarian diet may increase the risk of tooth decay and erosion. The exact reasons for this are not fully understood, but several factors may contribute to it. However, there are smart ways to avoid these problems - here are the best tips!

"One of the dangers of a vegetarian diet may be that it may contain highly processed foods, such as meat substitutes. These foods often contain refined carbohydrates that break down into acidic products. This, in turn, can promote the dissolution of minerals in tooth enamel and thus the formation of cavities," says Ludwig Hansson, a dentist and specialist in prosthetics from the Göta Tandvård dental clinic in Gothenburg, Sweden.

Many people equate a vegetarian diet with a healthy diet, and this may be true in many respects - but not always for dental health.

"There is a risk that it may not be as easy to achieve a feeling of satiety with a vegetarian diet, which may increase the number of daily meals. This also increases the strain on the teeth," says Ludwig Hansson.

Avoid Acidic Foods

Another risk for vegetarians is consuming acidic foods and drinks such as fruits and juices.

"For example, green apples and some juices are very acidic. They may have benefits in many other ways, but the acidity can be very taxing on the teeth. If you eat such foods frequently, there is a risk that the enamel will be damaged in a corrosive way," warns Hansson.

However, it is possible to combat acid attacks - if you act preemptively.

"Studies have shown that, for example, eating a piece of cheese before consuming acidic foods prevents cavities. Cheese is alkaline and fatty, thus forming a protective layer on the teeth," adds Hansson.

Lumoral light-activated treatment helps maintain oral health

Those following a vegan diet also face the risk of nutrient deficiencies, which can increase the risk of periodontal disease or tooth loss.

"Immune system deficiencies can ultimately lead to tooth loss. The most common deficiency among vegans is vitamin B12, which affects the body's immune system," notes Hansson.

Therefore, vegans may need additional supplements for essential minerals and vitamins. Otherwise, the same tips for preventing cavities and tooth loss apply to vegetarians as they do to others.

"Do not eat too often, avoid excessive consumption of sugar, carbohydrates, and acidic foods, and clean your teeth thoroughly. Also, avoid excessive consumption of processed foods," reminds Hansson.

The foundation of good oral health is always mechanical cleaning, with a toothbrush and dental floss or interdental brush. In addition, there are other aids in the form of a light-activated treatment. The Lumoral method, developed in Finland, eliminates 99.99 percent of harmful bacteria from the mouth.

"By brushing your teeth, you remove about 65 percent of the bacteria present on the teeth surfaces and gum line. Lumoral's light-activated treatment is easy to administer and it removes virtually all harmful bacteria. It can be a crucial complement for those who, due to factors such as a vegetarian diet, are at greater risk of cavities and oral health issues," says Ludwig Hansson.