| On the ground, rainfall impaction molds and snow crystal impressions are made. |
| A rectal examination can determine the presence of fecal impaction, and a simple urinalysis can be used to screen for infection or glycosuria. |
| In some patients, particularly the elderly or bedridden, fecal impaction may result. |
| Less commonly, shoulder dystocia results from impaction of the posterior shoulder on the sacral promontory. |
| Frequently this occurs as a result of impaction of ear wax or inflammation of the eardrum or the middle ear. |
| The most common type is mesial impaction, which means teeth that have grown at an angle facing towards the front of the mouth. |
