درجات حركة الاسنان Mobility Classifications

Mobility is an indicator of bone loss around the tooth. In order to accurately evaluate mobility, two non-working ends of the dental instruments (i.e., the mirror handle and the probe handle) are pressed on the buccal and lingual surfaces of the tooth.  The amount of movement is measured and classified as:

Class O	Complete tooth stability.
Class I	Tooth moves 1/2 mm buccally and 1/2 mm lingually.
Class II	All degrees between Class I and Class III mobility of up to 1mm in any direction.
Class III	Tooth is terminally mobile.  Greater than 1 mm in any direction and is depressible in the socket.