Ensure Oral Care Products Are Safe, Stability, and Protected from the Risk of Oral Bacteria

The human mouth is home to hundreds of species of microorganisms that live in a complex community known as the oral microbiota. Just as with healthy skin, the balance of the microbiota in the oral cavity also needs to be maintained, especially in the development of oral care products such as toothpaste, mouthwash, and dental gels that are applied directly to the mouth.

Not all oral bacteria have the same characteristics. Some bacteria play a normal role in the oral cavity, while others are often associated with periodontal disease and bad breath. Here are some interesting bacteria worth learning more about.

Table of Content:

• Fusobacterium nucleatum
• Porphyromonas gingivalis
• Prevotella intermedia.
• Streptococcus salivarius.
• Selenomonas sp.

Fusobacterium nucleatum

Fusobacterium nucleatum is an anaerobic (growth optimally without oxygen), Gram-negative, non-spore-forming bacterium. This bacterium is known to be associated with various types of infections and diseases in humans.

Naturally, F. nucleatum is found primarily in the oral cavity, but it can also be found in the gastrointestinal tract and genitourinary tract, including the urinary and reproductive systems. Although it is part of the normal microbiota in some parts of the body, this bacterium can cause disease when there is an imbalance in the microbiome or when it successfully invades certain body tissues.

This makes it relevant in the development of oral care products, especially for brands that want to evaluate claims related to oral hygiene, gum health, and microbial control. Various studies have shown that F. nucleatum can cause local infections, such as tonsillitis, peritonsillar abscess, septicemia (bacterial infection in the bloodstream), and abscesses in the brain, liver, and lungs.

These findings suggest that this bacterium not only plays a role in oral health but also has the potential to impact systemic health. In the oral cavity, F. nucleatum is most frequently found in periodontal pockets, the gaps that form between the teeth and gums due to periodontal disease.

Its presence in these locations is often associated with the development of periodontitis due to its ability to interact with various other bacteria in the dental plaque biofilm. Understanding this bacteria is crucial in the development of oral care products, particularly to help brands evaluate claims for oral hygiene, gum health, and microorganism control in products such as toothpaste, mouthwash, or dental gel.

Porphyromonas gingivalis

Porphyromonas gingivalis is one of the bacteria most commonly found in people with gum disease, particularly periodontitis, a gum infection that can damage the supporting tissue of the teeth. This bacteria thrives in oxygen-poor environments and is often found in dental plaque that accumulates below the gum line.

This bacteria has the ability to damage gum tissue through various substances it produces, one of which is an enzyme called gingipain. This enzyme helps the bacteria obtain nutrients while damaging the surrounding tissue, allowing the infection to progress further.

Porphyromonas gingivalis is commonly found in dental plaque under the gums, periodontal pockets formed by gum disease, and inflamed periodontal tissue. Therefore, this bacterium is often used as an important indicator in periodontal health research and examinations. This information is also relevant in the development of oral care products, especially for evaluating claims related to gum health, oral hygiene, and bacterial control in products such as toothpaste, mouthwash, or dental gel.

This information is also relevant in the development of oral care products, as it can help brands evaluate product claims related to gum health, oral hygiene, and bacterial control in products such as toothpaste, mouthwash, or dental gel.

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Prevotella intermedia.

Root canal infections occur when microorganisms enter the interior of the tooth through caries, cracks, trauma, or other pathways that open access to the pulp. This condition can cause inflammation and various dental complaints.

One group of bacteria frequently found in these infections is black-pigmented anaerobic bacteria. These bacteria thrive in low-oxygen environments and are often associated with symptoms such as pain, swelling, and pus discharge around the tooth root.

One member of this group is Prevotella intermedia. Research shows that this bacteria is found in approximately 26–40% of cases of dental pulp infections and can help accelerate the destruction of infected tissue.

Naturally, P. intermedia lives in areas with minimal oxygen, such as the gum crevices and the digestive tract. This bacterium is actually part of the normal microbiota, but it can become a disease-causing agent when its numbers increase excessively.

The ability of P. intermedia to trigger disease is related to compounds in its cell wall, such as lipopolysaccharide (LPS). These compounds can stimulate an inflammatory response and cause

In addition to triggering inflammation, the LPS released by the bacteria can also contribute to bone destruction around the teeth. Therefore, P. intermedia is often associated with periodontal disease and various dental infections.

Understanding this bacterium is crucial in the development of oral care products, particularly to help brands evaluate product claims related to gum health, oral cavity protection, and microorganism control in products such as toothpaste, mouthwash, or dental gel.

Streptococcus salivarius.

Not all oral bacteria are harmful. Streptococcus salivarius is a commensal bacterium that plays a vital role in maintaining oral health.

This Gram-positive bacterium is an early colonizer, found within the first few hours after birth. As babies age, S. salivarius remains a dominant inhabitant of the human tongue and saliva.

Some strains of S. salivarius are known to produce bacteriocins, antimicrobial compounds that can inhibit the growth of certain pathogenic bacteria. Due to this property, some strains have even been developed as oral probiotics.

These bacteria are generally isolated from saliva, the surface of the tongue, the buccal mucosa, and various areas of the oropharynx of healthy humans.

Selenomonas sp.

Selenomonas is a group of bacteria naturally found in the human oral cavity. Some species included in this group are Selenomonas flueggei, Selenomonas infelix, Selenomonas noxia, and Selenomonas sputigena.

Selenomonas bacteria generally live in areas with low oxygen levels, such as dental plaque and the spaces between teeth and gums. Therefore, these bacteria are often found alongside various other microorganisms, forming complex communities in the oral cavity.

Under certain conditions, Selenomonas numbers can increase and are often associated with gum disease, particularly periodontitis. Therefore, these bacteria are one of the microorganisms frequently studied to understand the development of periodontal disease.

In microbiological studies, Selenomonas are usually isolated from dental plaque, periodontal pockets, and biofilms that form in the oral cavity. Because these bacteria cannot grow well in oxygen-rich environments, their isolation process requires special, oxygen-depleted culture conditions.

This information is also crucial in the development of oral care products, as understanding anaerobic bacteria can help brands evaluate the quality, safety, and potential claims related to oral health.

Ensure Oral Care Products Are Safe from Oral Bacterial Risks

Oral care products such as toothpaste, mouthwash, and dental gel need to be developed with attention to the microorganisms present in the oral cavity. Through effectiveness testing, brands can understand potential microbial risks, support product claims, and ensure quality is more measurable before marketing. With IML Testing and Research, microbiological testing can be conducted professionally to help oral care products become safer, more credible, and more competitive.

Author: Dherika
Editor: Lina

References

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Kolenbrander, P. E., Andersen, R. N., & Moore, L. V. (1989). Coaggregation of Fusobacterium nucleatum, Selenomonas flueggei, Selenomonas infelix, Selenomonas noxia, and Selenomonas sputigena with strains from 11 genera of oral bacteria. Infection and immunity, 57(10), 3194–3203. https://doi.org/10.1128/iai.57.10.3194-3203.1989.

Mahdi, A.A., Al-Warid, R.J., & Ameer, H.A. (2019). Isolation and Identification of Prevotella intermedia by Culture and Polymerase Chain Reaction. Indian Journal of Public Health Research & Development, 10(5). 10.5958/0976-5506.2019.01177.X.

Murugaiyan, V., Utreja, S., Hovey, K.M. et al. (2024). Defining Porphyromonas gingivalis Strains Associated with Periodontal Disease. Sci Rep, 14(6222), 1-9. https://doi.org/10.1038/s41598-024-56849-x.