Some time ago we've made small survey and found that near of 50% of participants have problems in jaw/neck/shoulder area (https://ledstrain.org/d/404-short-led-strain-daily-life-survey/13). It's intresting to go deeply in this area.
I google a bit (but only in Russian) for symptoms and problems that caused by jaw problems and found few articles that mostly referencing to Jean Marie Landouzy "MAL DE DOS MAL DE DENTS" and "Les A.T.M. Évaluation, Traitements odontologiques et ostéopathiques"("Височно-нижнечелюстные суставы. Определение, стоматологическое и остеопатическое лечение") books. Articles mentioned that jaw problems could cause posture disorders, posture imbalance (that compensated by some permanent tension in muscles and ligaments that in next step causes some chronic pain), spine and back problems (and vise versa) and so on.
Maybe native French speakers could make more detailed research on Landouzy articles/books?
Next part from one of articles translated by deepl dot com (from "Low Back Pain, Toothache and Human Equilibrium Related to Posture and Teeth" Jean-Marie Landouzy, Russian Osteopathic Journal, № 3-4 (18-19) 2012, pp. 109-114):
These changes are numerous and affect the entire body, but especially the spinal column:
- The neck of the spine is tilted towards the lower jaw when the mouth is opened and turned in the opposite direction. This explains migraines and chronic cervical pains. And in response, we hear the doctor has a hereditary migraine or because of reading, computer, etc. Few people know that the migraine may be due to a bite.
- A lifting of the shoulder and pelvis on the lower jaw deflection side when opening, as well as a compensatory position of the chest, which is expressed in the form of muscular and joint pains in the shoulders, back and lower back.
These changes are more noticeable because they cause asymmetry of motion, strength and balance, forcing our body to compensate for this asymmetry. These changes are:
- Restrictions on neck rotation towards the raised shoulder and a lower jaw shift when the mouth is opened;"
"Postural impairment due to an imbalance in the lower jaw causes the same effect as asymmetrical loading on the rocker arm. One shoulder carries a heavier load than the other. That's why pain is often caused, which is localized between the shoulder blade and the thoracic region. This pain corresponds to the contracture of the muscles that should "hold" the lower shoulder.
Muscular-aponeurotic contractures and tensions block energyas well as slowing down blood flow and metabolic changes.
In addition to the additional costs associated with abnormal muscular work, postural imbalance is the cause of a reduction in the overall circulation of energy in the body."