Root Canals, Chronic Inflammation, and Whole-Body Health: What the Latest Science Means for Patients
When most people think about a root canal, they think about saving a tooth and relieving pain. But a newly released scientific review from the International Academy of Oral Medicine and Toxicology has sparked an important conversation about something much bigger: the relationship between root canal-treated teeth and overall health.
The review examines decades of research on root canal-treated teeth, chronic inflammation, and potential links to systemic health conditions. While the topic can be controversial, one thing is clear: oral health and whole-body health are deeply connected.
For patients, this isn't about fear. It's about understanding your options, asking the right questions, and working with a dentist who considers your health as a whole.
What Is a Root Canal?
A root canal is a procedure designed to save a tooth when the nerve and blood supply inside the tooth become infected or damaged.
During treatment, the infected tissue is removed, the canals inside the tooth are cleaned and disinfected, and the tooth is sealed to prevent future infection. Root canals have helped millions of people retain natural teeth that would otherwise require extraction.
In many cases, root canal therapy successfully relieves pain and restores function.
However, the IAOMT review highlights an important question:
Can a tooth appear successful clinically while still harboring chronic inflammation or infection?
What Did the IAOMT Review Find?
One of the most discussed findings is the prevalence of a condition called apical periodontitis.
Apical periodontitis is inflammation or infection around the tip of a tooth's root. It can develop before a root canal, but it can also persist afterward.
According to the review, studies using advanced 3D imaging suggest that approximately 40–60% of root canal-treated teeth may still show signs of apical periodontitis. Traditional dental X-rays often underestimate these findings.
This doesn't necessarily mean a patient feels pain or even knows there is an issue. In fact, many chronic dental infections are asymptomatic.
The review points out that modern imaging technologies, particularly Cone Beam Computed Tomography (CBCT), are revealing more information than ever before about the health of root canal-treated teeth.
Why Chronic Inflammation Matters
The human body doesn't separate oral health from overall health.
When chronic inflammation exists anywhere in the body, the immune system must continuously respond. Researchers have spent decades studying how oral infections and inflammation may influence other systems of the body.
The IAOMT review summarizes research showing associations between chronic apical periodontitis and conditions such as:
Cardiovascular disease
Diabetes
Metabolic syndrome
Autoimmune disorders
Neuroinflammatory conditions
Adverse pregnancy outcomes
It is important to understand what "association" means.
The review does not claim that root canals directly cause these diseases.
Rather, it highlights evidence suggesting that chronic oral inflammation may contribute to the body's overall inflammatory burden and may be one piece of a much larger health picture.
An Important Point Often Missed
One of the most important takeaways from the science is that untreated dental infections are also harmful.
When a tooth is infected, simply ignoring it is not a healthy option.
Interestingly, research cited in the review found that successful treatment of apical periodontitis may improve certain inflammatory and cardiovascular risk markers over time. Other recent research has also reported improvements in blood sugar regulation, cholesterol markers, and inflammation after treatment of chronic dental infections.
The question is not whether an infection should be treated.
The question is:
What treatment approach is most appropriate for a specific patient and a specific tooth?
Why a Biological Dentist May Look at Things Differently
Biological dentistry takes a broader view of oral health.
Rather than focusing only on the tooth itself, biological dentists evaluate how oral conditions may influence the rest of the body.
When assessing a root canal-treated tooth, a biological dentist may consider:
CBCT imaging findings
Presence of chronic inflammation
Immune system health
Autoimmune conditions
Cardiovascular health
Previous dental history
Patient symptoms
Overall wellness goals
This approach recognizes that two patients with identical X-rays may require very different recommendations based on their health history and risk factors.
How CBCT Imaging Changes the Conversation
Traditional dental X-rays provide a two-dimensional image.
CBCT imaging creates a detailed three-dimensional view of the tooth, surrounding bone, sinuses, nerves, and supporting structures.
The IAOMT review emphasizes that CBCT technology is significantly better at detecting areas of inflammation and infection that may not appear on conventional radiographs.
For patients experiencing unexplained symptoms or those seeking a more comprehensive evaluation of a root canal-treated tooth, CBCT imaging can provide valuable information that standard imaging may miss.
What Happens If a Root Canal Is Removed?
For some patients, extraction may become part of the discussion.
Reasons might include:
Persistent infection
Chronic inflammation
Tooth fracture
Failed root canal treatment
Extensive structural damage
Individual health considerations
If a root canal-treated tooth is removed, replacement options may include:
Ceramic Dental Implants
Many biological dentists favor zirconia (ceramic) implants because they are metal-free, biocompatible, and highly durable.
Dental Bridges
A bridge replaces a missing tooth by connecting to neighboring teeth.
Removable Partial Dentures
A removable option that may be appropriate in certain situations.
Leaving the Space Open
In some circumstances, replacement may not be necessary depending on the location of the tooth and the patient's bite.
The best solution depends on the individual's health, anatomy, goals, and overall treatment plan.
The Bigger Picture
The latest IAOMT review is not a call for every root canal-treated tooth to be removed.
Nor is it a declaration that root canals are inherently unsafe.
Instead, it highlights the importance of comprehensive evaluation, advanced diagnostics, and individualized decision-making.
What works for one patient may not be the best choice for another.
The emerging science continues to reinforce a principle that biological dentists have embraced for years:
The mouth is not separate from the body.
When evaluating oral health, it is worth considering not only how a tooth looks on an X-ray, but also how it may fit into the larger picture of systemic health and wellness.
For patients seeking a deeper understanding of their oral health, working with a holistic or biological dentist can provide a more comprehensive perspective one that considers both the tooth and the person attached to it.
FAQs
Can a root canal cause health problems?
Current research does not prove that root canals cause systemic disease. However, some studies have found associations between chronic inflammation around root canal-treated teeth and certain health conditions. This is why thorough evaluation and monitoring are important.
What is apical periodontitis?
Apical periodontitis is inflammation or infection around the tip of a tooth's root. It can occur before or after root canal treatment and may not always cause symptoms.
Why do biological dentists evaluate root canals differently?
Biological dentists consider not only the condition of the tooth but also the patient's overall health, immune function, inflammatory burden, and findings from advanced imaging such as CBCT scans.
Can a CBCT scan detect problems missed by traditional dental X-rays?
Yes. CBCT imaging provides a three-dimensional view of teeth and surrounding structures, often revealing areas of inflammation or infection that may not be visible on traditional 2D X-rays.
What are alternatives to a root canal?
Alternatives may include tooth extraction followed by a ceramic dental implant, dental bridge, removable partial denture, or, in some cases, leaving the space unfilled. The appropriate option depends on the patient's oral health, goals, and overall treatment plan.
Sources
International Academy of Oral Medicine and Toxicology. State of the Science on Root Canal Treated Teeth (RCTT). 2026.
Research summarized within the IAOMT position paper regarding chronic apical periodontitis, CBCT imaging, systemic inflammation, and treatment outcomes.
Coverage of recent research examining systemic health improvements following successful treatment of apical periodontitis.
Disclaimer: This article is intended for educational purposes only and should not be considered medical or dental advice. Treatment decisions should always be made in consultation with a qualified dental professional based on your unique health history and clinical findings.