Disclaimer: These preliminary ‘Self Tests’ may help you understand that though pain can be a significant indicator, it is not the only signal for TMJ dysfunction. A final diagnosis will be required by a professional like Dr. Eddie Siman. If you feel severe pain or you know you cannot do some of these exercises please do not attempt them.
In a healthy mouth, an overbite of 10% of the upper teeth over the lower teeth is normal and natural. Anything more than that increases the chance your bite may be unhealthy and misaligned. Deep overbites mean the lower jaw must stay back from a more natural position so that the upper and lower teeth can mesh together. This is most often caused by the upper dental arch being too narrow for the lower dental arch being able to fit where it is most natural and comfortable. Instead, it forces the lower jaw backward. A narrow palate also forces the tongue to spread out between the upper and lower back teeth, limiting their eruption and growth, and allowing them to tip inward. The muscles must then overclose and pull the lower jaw backward to fit the short back teeth together in the overclosed and retruded overbite position.
Overbites not only create muscle tension but also compress the jaw joint so it remains in an unhealthy position. Some of the most advanced jaw joint erosion and disease is seen in patients who have a deep overbite.