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Writer's pictureDr Caroline Oh

How Oral Health Could Influence Colorectal Cancer Risk: Insights for O Dental's Patients in Sydney

Updated: Apr 26


At O Dental in Sydney, we are committed to enhancing your overall health through superior oral care. Emerging research, such as the study "Metabolic and Community Synergy of Oral Bacteria in Colorectal Cancer," reveals a surprising connection between oral health and colorectal cancer (CRC). This blog simplifies these findings to show why maintaining good oral hygiene is crucial for your overall well-being.


The Connection Between Oral Bacteria and Colorectal Cancer

Research has increasingly shown that bacteria normally found in the mouth, especially those linked to gum disease, could also influence colorectal cancer. These bacteria are adept at surviving in different environments, including the colon, where they can disrupt normal cellular functions and potentially lead to cancerous growths.


Why Oral Bacteria Matter for Your Gut Health

Harmful oral bacteria can form protective clusters called biofilms in the colon. These biofilms allow bacteria to evade the body’s immune responses and interact destructively with colon cells. Such interactions can lead to changes that promote tumour development, highlighting a direct impact of oral health on gut health.


Simple Metabolic Processes with Big Impacts

The study details how these bacteria use a unique metabolic process that doesn’t rely on sugars but on proteins. This protein breakdown produces harmful by-products that can irritate the colon and damage its cells, which increases the risk of cancer. Understanding these processes opens potential pathways for new preventive and therapeutic treatments.


Preventive Strategies for Oral and Colorectal Health

At O Dental, we advocate for proactive oral hygiene and regular dental check-ups as fundamental strategies to reduce the presence of harmful bacteria. Brushing twice a day, flossing, and using an antimicrobial mouthwash can significantly lower the risk of gum disease and, potentially, its systemic health impacts. Additionally, dietary choices that reduce inflammation and support a healthy gut and mouth—like fiber-rich fruits and vegetables—can also play a critical role.


Broader Implications of Oral Health

The implications of oral health extend beyond the mouth. Diseases like colorectal cancer and even heart disease have been linked to oral bacterial imbalances. By maintaining a healthy oral microbiome, we not only safeguard our teeth and gums but also contribute to our overall health resilience.


What This Means for O Dental Patients in Sydney

For our patients at O Dental, these insights reinforce the importance of regular dental visits. Not only do they help prevent dental problems, but they also serve as a critical component of your overall health strategy. Remember, a healthy mouth supports a healthy body.



The link between oral health and serious systemic diseases like colorectal cancer highlights the critical role of dental care in overall health management. At O Dental, we are equipped to provide top-notch dental care that supports your entire well-being.


Visit Us

To learn more about how you can protect both your oral and overall health, visit us at O Dental in Sydney. Our team is ready to support you with comprehensive care that extends well beyond your smile.


Further Reading

For those interested in the scientific details behind these insights, you can access the full study, "Metabolic and Community Synergy of Oral Bacteria in Colorectal Cancer," published in the journal mSphere. Here is the link to the article: https://journals.asm.org/doi/10.1128/msphere.00102-16


References Flynn, K. J., Baxter, N. T., & Schloss, P. D. (2016). Metabolic and community synergy of oral bacteria in colorectal cancer. mSphere, 1(3), e00102-16.


This is a diagram that models the Oral Bacteria Activities in the Colon taken from the referenced research.



Diagram that models Oral Bacteria activities in the Colon
Diagram that models Oral Bacteria activities in the Colon


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