there are two types of type

 First, the primary co-traumatic primary occlusal trauma
Where due to abnormal or excessive force factor, so that normal periodontal tissue damage, known as primary co trauma. Primary occlusal plane periodontal tissue injury is normal, but the bite force is excessive or abnormal occlusal direction, more than the normal periodontal tissue can withstand the load.
Second, the secondary co-traumatic secondary occlusal trauma
Because periodontitis and other reasons, the lack of supportive periodontal tissue itself, incapable of normal or excessive bite force, so that further damage periodontal tissue called secondary trauma together.
Bite wounds are secondary station is due to other causes periodontitis periodontal tissue support strong High Speed Handpiece enough that periodontal tissue's ability to withstand December force weakened, in this case the normal or abnormal bite can lead to bite Taiwan of trauma.
Some scholars have proposed acute occlusal trauma (acute trauma from occlusion) and chronic traumatic occlusion (chronic trauma from occlusion). Acute emergencies caused by occlusal trauma refers to excessive occlusal forces (such as chewing hard objects) caused by periodontal trauma. And chronic traumatic occlusion refers to sustained abnormal bite force caused by periodontal tissue damage.