The chart that I posted here shows energetic relationships between teeth and various parts of the body - this is based on acupuncture which studies energetic points or meridians of the body. This practice is well accepted and has great merit to it so its important to get people in the health care industry to start viewing and treating the human body as a whole rather than masking a symptom with drugs.
Teeth meridian chart is particularly useful in helping people finding the relationships between root canaled teeth and other areas of discomfort in their bodies. Root canaled teeth are dead and block the energy flow through the particular meridian so every organ in that meridian is affected. When the dead tooth is removed (or even when its simply numbed) patients often see immediate relief in other areas of their body.
Below are sites with the chart and explanations.