What is Somatic Dentistry?

A question that leads from the mouth to the body

When we hold half a peanut with our front teeth, we use a force of less than 1 N^9,10. To bite down and split it, we use 16–19 N, more than twenty times the holding force⁹. The periodontal ligament (PDL) that surrounds the tooth root is a thin tissue, 0.15–0.38 mm wide¹¹, yet in each tooth it holds several hundred sensitive touch receptors¹². This fine control draws on sensation from the PDL¹³, and its signals enter the brainstem along the trigeminal nerve, where they are used to choose the chewing movement³. The mouth is a small space, but the sensation and movement that pass through it are this finely tuned.

All along, I had been thinking of occlusal problems, gum problems, jaw-joint problems and the like as separate matters¹⁴. Once I came to understand the relationship between the teeth and the body, I began to ask whether the very act of doing something for patients as a dentist really helps the body, and I resolved once again to put together material of my own¹⁵. Whenever an answer was hard to see, I asked myself, “Could there be something I haven’t seen?”¹⁶

The more I studied, the clearer it became: saying that a connection exists is one thing, and how far that connection has been confirmed is another. Textbooks explain the anatomy of the path from the teeth through the trigeminal nerve to the brainstem³. The finding that people with more tooth loss had a higher risk of cognitive impairment was observed in human studies, but it does not show cause and effect⁵. Likewise, observational studies support an association between periodontal disease and vascular disease, but not causation: that is the conclusion of a statement from the American Heart Association⁴. The idea that tooth sensation is linked to memory and cognition is one I proposed in a hypothesis paper, and it is still a hypothesis⁸. One experiment found fewer neurons in the brainstem and hippocampus of Alzheimer’s disease model mice whose molars had been extracted¹⁷, but that is a result in mice, not in people.

For each connection, this site’s evidence map and evidence notes record separately what is established by anatomy, what is observed in human studies and what is still a hypothesis, and they keep what is seen in the clinic as a testable hypothesis. The aim is to state what is established clearly, what has been observed as far as it has been observed, and hypotheses as hypotheses. The soma in the name, that is, the body, is the starting point that the teeth and mouth are part of the body, and the way to read that body is through the pathways of sensation and movement. Reading the layers apart like this shows how far a question that began in the mouth has reached, and where it stops.

The mouth is one of the high-resolution windows into the body.

Definition and evidence map

How far has the connection between the mouth and the body been confirmed?

From the teeth through the trigeminal nerve to the brainstem, the path is established by anatomy; the connection to the hippocampus is still a hypothesis; and between periodontal disease or tooth loss and systemic conditions there are associations observed in human studies. The tables below follow the six stations of the anatomical journey, giving the layer and sources for each connection, and group separately the associations that are not neural pathways. Cells we could not confirm are marked “Not yet determined.”

Table 1 Connections between the six stations, and the layer of evidence for each

Connection	What connects	Layer	Mark	Evidence	Evidence note
① Occlusion (start)	How the upper and lower teeth come together	Station (not a connection)	—	Not yet determined	Not yet determined
① Occlusion → ② PDL	Mechanoreceptors in the PDL around the root pick up the force placed on the tooth. Each tooth has several hundred of these receptors.	Established	Solid	Textbooks Ten Cate¹¹, Klineberg & Eckert, ch. 10¹² · Human experiment Force for holding half a peanut with the front teeth: under 1 N^9,10	How small a force can a tooth feel?
② PDL → ③ Trigeminal nerve	Periodontal signals travel through the alveolar nerves to the trigeminal ganglion, and these signals have also been recorded from the inferior alveolar nerve in people.	Established	Solid	Textbooks Lang & Lindhe, ch. 6 (Jacobs)¹³, Okeson, ch. 2³ · Human nerve recordings Periodontal signals recorded from the inferior alveolar nerve¹⁰	Not yet determined
② PDL → Mesencephalic trigeminal nucleus	Some of the deep sensation from the PDL and from the muscle spindles of the jaw-closing muscles goes to the mesencephalic trigeminal nucleus and on to the jaw-closing motor neurons.	Not yet determined (textbook check in progress)	—	Review of animal data Mesencephalic trigeminal nucleus¹⁸	Not yet determined
③ Trigeminal nerve → ④ Brainstem	Signals enter the trigeminal sensory nuclei of the pons and medulla, and the brainstem’s chewing rhythm generator uses this information to choose the chewing movement.	Established	Solid	Textbook Okeson, ch. 2³ · Review (mammalian data) Lund & Kolta¹⁹	Not yet determined (Figure 1 of “How small a force can a tooth feel?” summarizes this link)
④ Brainstem → ⑤ Hippocampus	The idea that sensory input from the teeth is linked to memory and cognition.	Still a hypothesis	Dotted	Animal data In Alzheimer’s disease model mice, neurons in the mesencephalic trigeminal nucleus and the hippocampus decreased after molars were extracted¹⁷ · Human experiment (limitation) After periodontal anesthesia, prefrontal blood flow decreased, but memory and cognition were not measured; 5 people²⁰ · Hypothesis The editor’s hypothesis paper⁸	Not yet determined
⑤ Hippocampus → ⑥ Whole body	Not yet determined	Not yet determined	—	Not yet determined	Not yet determined
① Occlusion → ⑥ Whole-body posture	The relationship between occlusion and body posture. Some studies have reported a relationship and others have not; where correlations are reported they are weak, and neither a predictable relationship nor causation has been confirmed.	Observed in human studies	DashedFindings are mixed	Reviews Cuccia & Caradonna²¹, Manfredini et al.⁶, Michelotti et al.²² · Systematic reviews 21 posturography studies²³, 12 stabilometric platform studies⁷	Not yet determined

Table 2 Associations observed in human studies (branches that are not neural pathways; dashed lines on the map)

Association	What was observed	Layer	Mark	Evidence
Periodontal disease ↔ systemic disease	Observational studies support an association between periodontal disease and atherosclerotic vascular disease independent of known confounders, but do not support causation. Chronic periodontitis has been associated with elevated blood markers of inflammation.	Observed in human studies	Dashed	Scientific statement American Heart Association⁴ · Review Kamer et al.²⁴ (the mechanisms linking periodontitis and Alzheimer’s disease are at the proposal stage)
Periodontal bacteria ↔ brains of people with Alzheimer’s disease	The enzymes and DNA of a periodontitis bacterium (P. gingivalis) were found in patients’ brain tissue. Enzyme levels were higher than in the brains of people without dementia, though some of those brains contained them too.	Observed in human studies	DashedCausal role still a hypothesis	Human brain tissue and mouse experiments Dominy et al.²⁵
Tooth loss ↔ cognitive impairment and dementia	In a meta-analysis of 14 longitudinal studies (34,074 people), people with more tooth loss had 1.48 times the risk of cognitive impairment and 1.28 times the risk of a dementia diagnosis; among people who used dentures, the association was not statistically significant.	Observed in human studies	Dashed	Meta-analysis of observational studies Qi et al.⁵

How are the three layers distinguished?

Connections are sorted by the kind of source that supports each one.

Layer (line)	What goes in it	Example
Established (solid)	Connections that textbooks explain through anatomy and function	teeth → trigeminal nerve → brainstem
Observed in human studies (solid: measured in people · dashed: association in observational studies)	Experiments and nerve recordings measured in people, and associations seen in observational studies. Because associations do not show cause and effect, they are drawn separately on the map, with dashed lines	periodontal disease or tooth loss ↔ systemic conditions (association), occlusion ↔ body posture (findings are mixed)
Still a hypothesis (dotted)	Connections not confirmed in people, that is, connections supported only by animal data and connections proposed in a hypothesis paper, along with what is seen in the clinic	the connection to the hippocampus (memory and cognition)

Animal data are a kind of source, not a layer. When animal data show in detail a connection that textbooks explain, it is recorded as “Established”; when animal data alone support a connection not confirmed in people, it is recorded as “Still a hypothesis.” When studies of the same question disagree, the mark “Findings are mixed” is added alongside the layer.

What is Somatic Dentistry not?

Somatic Dentistry is not a treatment or an officially recognized specialty, nor is it the same as other fields with similar names. Each of those fields also draws on a philosophy and training built up over many years to look at how a person’s whole body is connected. When I see people who study the body and care for patients from this perspective, I always find it remarkable. That is because the very attitude of trying to see the whole body in its connections is itself a deep form of study. So this page sets out only what each field centers on, and how this perspective reads.

It is not a particular treatment or clinical approach. It is a perspective that reads research and marks the layer of evidence for each connection.
It is not alternative medicine. It is a perspective within dentistry that reads anatomy, human studies and hypotheses as distinct from one another.
It is not a theory that explains the body’s many symptoms by the teeth or occlusion alone. The path from the teeth to the brainstem is established by anatomy, but the connections beyond it are associations observed in human studies, are still hypotheses or are areas where findings are mixed.
It is not another name for holistic or biological dentistry. Holistic and biological dentistry is described as an approach in dentistry that considers how dental materials and oral health affect the body as a whole²⁶. Somatic Dentistry starts from the sensory and motor pathways of the teeth and mouth, and reads them by recording, for each connection, which layer it sits in: anatomy, human studies or hypothesis.
It is also a different field from psychosomatic dentistry. Psychosomatic dentistry deals with oral symptoms whose cause examinations have not found, in the context of the relationship between mind and body²⁷. The soma in this name means the body, and this perspective reads the sensory and motor pathways of the teeth and mouth according to the layers of evidence.
It is not body-movement education, such as somatics, or psychotherapy. Somatics is movement education that focuses attention on sensing the body from within²⁸. Somatic Dentistry does not teach a training method; it reads research in dentistry.
It is not the name of an officially recognized specialty or of an academic society. It is a definition set by this site and maintained with dates and a record of corrections.

Evidence

What this page can say. Textbooks explain that sensory signals from the teeth and mouth travel along the trigeminal nerve to the brainstem and are used in chewing movements. Associations between periodontal disease or tooth loss and systemic conditions have been observed in human studies.
What this page cannot say. It does not show that tooth sensation is linked to memory, that the associations are cause and effect, or that any intervention involving the teeth or occlusion has an effect on the body or on brain function.

The table below collects, for each question in the text, the supporting evidence and its limitations. Each cell lists textbooks first, then consensus statements and reviews (including systematic reviews), human studies, animal experiments and hypotheses; within each tier, sources with more citations (OpenAlex, retrieved October 11, 2026) come first.

Table 3 Questions in the text and their evidence

Question in the text	Supporting evidence	Contrary results and limitations	Layer
How far has the connection between the mouth and the body been confirmed? Established as far as the brainstem, a hypothesis for the hippocampus, associations with systemic conditions	Textbooks Okeson, ch. 2: sensory input from the face and mouth enters the pons through the trigeminal nerve, and the brainstem’s chewing rhythm generator uses information from the teeth and PDL to choose the chewing movement³. Ten Cate and Klineberg & Eckert, ch. 10: the PDL and its receptors^11,12 Consensus and reviews American Heart Association statement⁴, review of periodontitis and Alzheimer’s disease²⁴, review of the stomatognathic system and body posture²¹, chewing rhythm and sensory feedback¹⁹, review of occlusion, posture and the temporomandibular joint⁶, review of human periodontal nerve recordings by the same research group¹⁰, meta-analysis of tooth loss and cognition⁵, review of occlusion and posture²², systematic reviews of posturography^23,7 Human study Periodontal bacteria in patients’ brain tissue²⁵ Animal experiment Changes in the mesencephalic trigeminal nucleus and hippocampus after molar extraction (mice)¹⁷ Hypothesis The editor’s hypothesis paper⁸	The American Heart Association statement supports an association but not causation⁴ The tooth-loss meta-analysis is of observational studies, and among denture users the association was not statistically significant⁵ The interpretation that periodontal bacteria in patients’ brains cause the disease relies on mouse experiments and the authors’ interpretation, and several authors, including the first author, list affiliations with the company (Cortexyme) that made the bacterial-enzyme inhibitors in this study²⁵ The human study (5 people) measured only prefrontal blood flow, not memory or cognition²⁰ On occlusion and body posture, findings are mixed, and where correlations are reported they are weak^23,7. The connection from the hippocampus to the whole body is not yet determined	Varies by connection (Tables 1 and 2)
How are the three layers distinguished? By the kind of source	This site’s method of choosing evidence (editorial interpretation)	Assigning a layer is an editorial judgment, and an independent verifier checks each row again	Editorial interpretation
What is Somatic Dentistry not? Not a treatment, a specialty or a neighboring field	Review What psychosomatic dentistry deals with²⁷ Encyclopedia Holistic dentistry²⁶, somatics²⁸	Encyclopedias are secondary sources; this page uses the versions opened on October 11, 2026	Editorial interpretation
The meaning of the name soma is Greek for body	Dictionary Etymology of somatic¹ Review Oral somatosensory and motor pathways²	The dictionary is a secondary source	Established (etymology), editorial interpretation (meaning of the name)

Show the evidence for every statement

Table 4 Claims table: the evidence grade and sources of the 55 main factual statements in the text (numbers refer to the reference list)

Claim	Evidence grade	Source no. · DOI
The soma in Somatic is Greek for body.	Established	1
The soma in the name, that is, the body, is the starting point that the teeth and mouth are part of the body, and the way to read that body is through the pathways of sensation and movement.	Editorial interpretation	1; 2 doi:10.1111/j.1365-2842.2006.01623.x; Editor's decision, October 11, 2026
The meaning of the name, and who set the definition	Editorial interpretation	1; 2 doi:10.1111/j.1365-2842.2006.01623.x; Editor's decision, October 11, 2026
The name expresses the intention to read the teeth and mouth as part of the body, and that connection is checked against the evidence, following the somatosensory and motor pathways.	Editorial interpretation	2 doi:10.1111/j.1365-2842.2006.01623.x; Editor's decision, October 11, 2026
It covers, among other things, the teeth, occlusion, tongue, temporomandibular joint, breathing and posture, and the path by which their sensation reaches the brain through proprioception and the trigeminal nerve; what is seen in the clinic is kept as a testable hypothesis.	Editorial interpretation	3 ISBN 978-0-323-58210-0; Editor's decision, October 11, 2026
The path from the teeth through the trigeminal nerve to the brainstem is established by anatomy.	Established	3 ISBN 978-0-323-58210-0
PDL → trigeminal nerve: periodontal signals travel through the alveolar nerves to the trigeminal ganglion, and these signals have also been recorded from the inferior alveolar nerve in people	Established	3 ISBN 978-0-323-58210-0; 10 doi:10.1016/s0301-0082(96)00016-0; 13 ISBN 978-0-470-67248-8
Trigeminal nerve → brainstem: signals enter the trigeminal sensory nuclei of the pons and medulla, and the brainstem's chewing rhythm generator uses this information to choose the chewing movement	Established	3 ISBN 978-0-323-58210-0; 19 doi:10.1007/s00455-006-9027-6
The brainstem's chewing rhythm generator chooses the chewing movement from the information the teeth and PDL feed back	Established	3 ISBN 978-0-323-58210-0
Sensory signals from the teeth and mouth enter the brainstem (pons) along the trigeminal nerve	Established	3 ISBN 978-0-323-58210-0
The mouth is a small space, but the sensation and movement that pass through it are this finely tuned.	Editorial interpretation	3 ISBN 978-0-323-58210-0; 9 doi:10.1007/BF00230428; 13 ISBN 978-0-470-67248-8
Tooth sensation is carried along the trigeminal nerve to the brainstem	Established Link to memory and cognition still a hypothesis	3 ISBN 978-0-323-58210-0; 8 doi:10.1016/j.nbas.2026.100169; 19 doi:10.1007/s00455-006-9027-6; 20 doi:10.1038/srep36893
The connection to the hippocampus is still a hypothesis, associations between periodontal disease or tooth loss and systemic conditions have been observed in human studies, and findings on occlusion and body posture are mixed.	Editorial interpretation	4 doi:10.1161/CIR.0b013e31825719f3; 5 doi:10.1016/j.jamda.2021.05.009; 6 doi:10.1111/j.1365-2842.2012.02291.x; 7 doi:10.1080/08869634.2020.1857614; 8 doi:10.1016/j.nbas.2026.100169; 17 doi:10.3233/JAD-200257; 20 doi:10.1038/srep36893; 21 doi:10.1590/S1807-59322009000100011; 22 doi:10.1016/j.pio.2010.09.010; 23 doi:10.1111/j.1365-2842.2009.02019.x; 24 doi:10.1016/j.jalz.2007.08.004
Periodontal disease and systemic disease: observational studies support an association between periodontal disease and atherosclerotic vascular disease independent of known confounders, but do not support causation	Observed in human studies	4 doi:10.1161/CIR.0b013e31825719f3; 24 doi:10.1016/j.jalz.2007.08.004
Tooth loss and cognition: in a meta-analysis of 14 longitudinal studies (34,074 people), people with more tooth loss had 1.48 times the risk of cognitive impairment (95% CI 1.18–1.87) and 1.28 times the risk of a dementia diagnosis (1.09–1.49). Among people who used dentures, the association was not statistically significant (RR 1.00, 95% CI 0.90–1.11)	Observed in human studies	5 doi:10.1016/j.jamda.2021.05.009
An association between tooth loss and cognitive impairment or dementia has been observed, but causation has not been confirmed	Observed in human studies	5 doi:10.1016/j.jamda.2021.05.009
Occlusion → whole-body posture: some studies have reported a relationship and others have not; where correlations are reported they are weak, and neither a predictable relationship nor causation has been confirmed	Observed in human studies Findings are mixed	6 doi:10.1111/j.1365-2842.2012.02291.x; 7 doi:10.1080/08869634.2020.1857614; 21 doi:10.1590/S1807-59322009000100011; 22 doi:10.1016/j.pio.2010.09.010; 23 doi:10.1111/j.1365-2842.2009.02019.x
Brainstem → hippocampus: the idea that sensory input from the teeth is linked to memory and cognition	Still a hypothesis	8 doi:10.1016/j.nbas.2026.100169; 17 doi:10.3233/JAD-200257; 20 doi:10.1038/srep36893
The idea that tooth sensation is linked to memory or cognition (the editor's hypothesis paper)	Still a hypothesis	8 doi:10.1016/j.nbas.2026.100169; 20 doi:10.1038/srep36893
The force for holding half a peanut or a piece of biscuit with the central incisors is under 1 N (0.36–0.76 N across participants) and steady	Observed in human studies	9 doi:10.1007/BF00230428
The force for splitting half a peanut is 16.0–19.0 N across participants	Observed in human studies	9 doi:10.1007/BF00230428
The splitting force is more than twenty times the holding force (site calculation)	Editorial interpretation	9 doi:10.1007/BF00230428
The mouth is one of the high-resolution windows into the body.	Editorial interpretation	9 doi:10.1007/BF00230428; 12 doi:10.1016/b978-0-7234-3809-0.00010-3; 13 ISBN 978-0-470-67248-8; Hämmerle et al. 1995 doi:10.1034/j.1600-0501.1995.060203.x
Human periodontal signals were recorded from the inferior alveolar nerve, which supplies the lower teeth	Observed in human studies	10 doi:10.1016/s0301-0082(96)00016-0
Occlusion → PDL: mechanoreceptors in the PDL around the root pick up the force placed on the tooth	Established	11 ISBN 978-0-323-48524-1; 12 doi:10.1016/b978-0-7234-3809-0.00010-3
The PDL is soft connective tissue between root and bone, 0.15–0.38 mm wide	Established	11 ISBN 978-0-323-48524-1
Each tooth's PDL holds several hundred highly sensitive touch receptors; none lie close to an implant	Established	12 doi:10.1016/b978-0-7234-3809-0.00010-3
Teeth feel the forces placed on them as touch (periodontal receptors provide the conscious perception of force)	Established	12 doi:10.1016/b978-0-7234-3809-0.00010-3; 13 ISBN 978-0-470-67248-8; Hämmerle et al. 1995 doi:10.1034/j.1600-0501.1995.060203.x
Periodontal touch information is used mainly for the fine control of biting and chewing forces, not for protection	Established	13 ISBN 978-0-470-67248-8
All along, I had been thinking of occlusal problems, gum problems, jaw-joint problems and the like as separate matters.	Editor's view	14
Once I came to understand the relationship between the teeth and the body, I began to ask whether the very act of doing something for patients as a dentist really helps the body,	Editor's view	15
and I resolved once again to put together material of my own.	Editor's view	15
Could there be something I haven't seen?	Editor's view	16
PDL → mesencephalic trigeminal nucleus: some of the deep sensation from the PDL and from the muscle spindles of the jaw-closing muscles goes to the mesencephalic trigeminal nucleus and on to the jaw-closing motor neurons	Not yet determined Textbook check in progress	18 doi:10.2334/josnusd.16-0845
The mesencephalic trigeminal nucleus in the brainstem receives input from the PDL and muscle spindles and relays it mainly to the jaw-closing motor neurons	Animal data	18 doi:10.2334/josnusd.16-0845
In mammals, a pattern generator in the brainstem (pons and medulla) generates the chewing rhythm, and feedback from oral touch receptors, muscle spindles and PDL mechanoreceptors modifies it especially strongly	Established Review of mammalian (animal) data	19 doi:10.1007/s00455-006-9027-6
With the periodontal tissues anesthetized, prefrontal blood flow fell, but memory and cognition were not measured (5 people)	Observed in human studies	20 doi:10.1038/srep36893
Periodontal bacteria and the brain: the enzymes and DNA of a periodontitis bacterium (P. gingivalis) were found in the brain tissue of people with Alzheimer's disease; enzyme levels were higher than in the brains of people without dementia, though some of those brains contained them too	Observed in human studies Causal role still a hypothesis	25 doi:10.1126/sciadv.aau3333
Holistic and biological dentistry is described as an approach in dentistry that considers how dental materials and oral health affect the body as a whole.	External description	26
Not the same as holistic dentistry	Editorial interpretation	26; Editor's decision, October 11, 2026
Psychosomatic dentistry deals with oral symptoms whose cause examinations have not found, in the context of the relationship between mind and body.	External description	27 doi:10.1186/s13030-016-0068-2
Somatics is movement education that focuses attention on sensing the body from within.	External description	28
Somatic Dentistry is a perspective within dentistry that reads how sensation and movement in the teeth and mouth connect with the rest of the body, distinguishing connections established by anatomy, those observed in human studies and those that are still hypotheses.	Editorial interpretation	Editor's decision, October 11, 2026
It is not a particular treatment or an officially recognized specialty; it is a definition that this site maintains with dates and a record of corrections.	Editorial interpretation	Editor's decision, October 11, 2026
What is seen in the clinic is placed in the "Still a hypothesis" layer of these three and written as a question that research can test. This site does not use clinical cases as evidence.	Editorial interpretation	Editor's decision, October 11, 2026
It is not alternative medicine. It is a perspective within dentistry that reads anatomy, human studies and hypotheses as distinct from one another.	Editorial interpretation	Editor's decision, October 11, 2026
Each connection is assigned a layer by the kind of source that supports it (established / observed in human studies / still a hypothesis). Animal data are a kind of source, not a layer. When findings on the same question conflict, the mark "Findings are mixed" is added.	Editorial interpretation	Editor's decision, October 11, 2026
① Occlusion: how the upper and lower teeth come together (a station, not a connection)	Not yet determined	Not yet determined
Hippocampus → whole body: not yet determined	Not yet determined	Not yet determined
Somatic Dentistry starts from the sensory and motor pathways of the teeth and mouth, and reads them by recording, for each connection, which layer it sits in: anatomy, human studies or hypothesis.	Editorial interpretation	Editor's decision, October 11, 2026
When I see people who study the body and care for patients from this perspective, I always find it remarkable.	Editor's view	Editor's note, June 9, 2026
Saying that a connection exists is one thing, and how far that connection has been confirmed is another.	Editorial interpretation	Editor's decision, October 11, 2026
For each connection, this site's evidence map and evidence notes record separately what is established by anatomy, what is observed in human studies and what is still a hypothesis, and they keep what is seen in the clinic as a testable hypothesis.	Editorial interpretation	Editor's decision, October 11, 2026
The aim is to state what is established clearly, what has been observed as far as it has been observed, and hypotheses as hypotheses.	Editorial interpretation	Editor's decision, October 11, 2026
Not a treatment	Editorial interpretation	Editor's decision, October 11, 2026

Frequently asked questions

Is Somatic Dentistry the same as holistic dentistry? No, it is not. Holistic and biological dentistry is described as an approach in dentistry that considers how dental materials and oral health affect the body as a whole²⁶. Somatic Dentistry is a perspective within dentistry that starts from the sensory and motor pathways of the teeth and mouth and, for each connection, records separately what is established by anatomy, what is observed in human studies and what is still a hypothesis.

Is Somatic Dentistry a treatment? No. It is a perspective within dentistry for reading research, and it makes no claim about the effect of any treatment.

Is tooth sensation connected to the brain? Yes. Sensory signals from the teeth and mouth enter the brainstem along the trigeminal nerve, and the brainstem’s chewing rhythm generator uses this information to choose the chewing movement^3,19. The idea that this sensation is linked to brain functions such as memory or cognition is one I proposed in a hypothesis paper; it is not a conclusion confirmed in people⁸.

Does losing teeth lead to dementia? Cause and effect has not been confirmed. In a meta-analysis of 14 longitudinal studies, people with more tooth loss had 1.48 times the risk of cognitive impairment and 1.28 times the risk of a dementia diagnosis, and among people who used dentures the association was not statistically significant⁵. Observational studies like these show only an association; they do not show that tooth loss causes dementia. Nor can this study tell us whether using dentures or receiving treatment lowers this risk.

What does “Somatic” mean, and who set this definition? The soma in Somatic is Greek for body¹. This definition was set by this site, which is edited by Kyung-A Oh, a dentist and the author of the hypothesis paper The DentoNeural Axis (2026)⁸. It is not the definition of an officially recognized specialty but this site’s definition, and each time it is revised, the date and the correction are recorded.

References

1. Wiktionary. somatic (Etymology). https://en.wiktionary.org/wiki/somatic (accessed October 11, 2026)

2. Sessle BJ. Mechanisms of Oral Somatosensory and Motor Functions and Their Clinical Correlates. Journal of Oral Rehabilitation. 2006;33(4):243–261. https://doi.org/10.1111/j.1365-2842.2006.01623.x

3. Okeson JP. Management of Temporomandibular Disorders and Occlusion. 8th ed. Elsevier; 2020. Ch. 2, pp. 23, 26–35. ISBN 978-0-323-58210-0. https://shop.elsevier.com/books/management-of-temporomandibular-disorders-and-occlusion/okeson/978-0-323-58210-0

4. Lockhart PB, Bolger AF, Papapanou PN, Osinbowale O, Trevisan M, Levison ME, et al. Periodontal Disease and Atherosclerotic Vascular Disease: Does the Evidence Support an Independent Association? Circulation. 2012;125(20):2520–2544. https://doi.org/10.1161/CIR.0b013e31825719f3

5. Qi X, Zhu Z, Plassman BL, Wu B. Dose-Response Meta-Analysis on Tooth Loss With the Risk of Cognitive Impairment and Dementia. Journal of the American Medical Directors Association. 2021;22(10):2039–2045. https://doi.org/10.1016/j.jamda.2021.05.009

6. Manfredini D, Castroflorio T, Perinetti G, Guarda-Nardini L. Dental Occlusion, Body Posture and Temporomandibular Disorders: Where We Are Now and Where We Are Heading For. Journal of Oral Rehabilitation. 2012;39(6):463–471. https://doi.org/10.1111/j.1365-2842.2012.02291.x

7. Álvarez Solano C, González Camacho L, Castaño Duque S, Cortés Velosa T, Vanoy Martin J, Chambrone L. To Evaluate Whether There Is a Relationship between Occlusion and Body Posture as Delineated by a Stabilometric Platform: A Systematic Review. CRANIO. 2023;41(4):368–379. https://doi.org/10.1080/08869634.2020.1857614

8. Oh K-A. The DentoNeural Axis: A Piezo Channel-Mediated Mechanosensory Pathway Linking Tooth Loss to Cognitive Decline. Aging Brain. 2026;10:100169. https://doi.org/10.1016/j.nbas.2026.100169

9. Trulsson M, Johansson RS. Forces Applied by the Incisors and Roles of Periodontal Afferents during Food-Holding and -Biting Tasks. Experimental Brain Research. 1996b;107(3):486–496. https://doi.org/10.1007/BF00230428

10. Trulsson M, Johansson RS. Encoding of Tooth Loads by Human Periodontal Afferents and Their Role in Jaw Motor Control. Progress in Neurobiology. 1996a;49(3):267–284. https://doi.org/10.1016/s0301-0082(96)00016-0

11. Nanci A. Ten Cate’s Oral Histology: Development, Structure, and Function. 9th ed. Elsevier; 2018. Ch. 9, pp. 475–476, 492–498. ISBN 978-0-323-48524-1. https://shop.elsevier.com/books/ten-cates-oral-histology/nanci/978-0-323-48524-1

12. Svensson KG, Trulsson M. Physiological Considerations of Oral Implant Function. In: Klineberg I, Eckert SE, editors. Functional Occlusion in Restorative Dentistry and Prosthodontics. Elsevier; 2016. Ch. 10, pp. 131–141. ISBN 978-0-7234-3809-0. https://doi.org/10.1016/b978-0-7234-3809-0.00010-3

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This article explains research. It is not a diagnosis or treatment advice for any individual.