Impaction

impaction /im·pac·tion/ (im-pak´shun)

1. the condition of being impacted.

2. in obstetrics, the indentation of any fetal parts of one twin onto the surface of its co-twin, so that the simultaneous partial engagement of both twins is permitted.

---

dental impaction  prevention of eruption, normal occlusion, or routine removal of a tooth because of its being locked in position by bone, dental restoration, or surfaces of adjacent teeth.

fecal impaction  a collection of hardened feces in the rectum or sigmoid.

---

im·pac·tion (m-pkshn)

n.

The process or condition of being impacted.

---

Impaction

A condition in which earwax has become tightly packed in the outer ear to the point that the external ear canal is blocked.

Mentioned in: Cerumen Impaction

---

impaction

the condition of being impacted. Most commonly a condition in the alimentary tract of herbivores fed on roughage of poor digestibility. See also impactions of anal sacs of dogs, oviduct of birds, scent glands of ruminants.

---

impaction colic

see impaction colic.

fecal impaction

a syndrome of moderate toxemia, an absence of fecal movements and straining in some cases. There is a collection of putty-like or hardened feces in the rectum or sigmoid. In horses fed on roughage of poor digestibility, the syndrome is one of colic due to impaction in the colon or cecum or both, or of the ileocecal valve. In cattle the syndrome is one of indigestion and ruminal stasis, less commonly abomasal impaction. In both syndromes there is a delayed passage of feces and palpably distended, firm viscera in appropriate locations. Each of these specific impactions is discussed under colic, abomasal impaction, ruminal impaction, omasal impaction, crop-bound and oviduct impaction of birds.

impaction large intestine

see impaction colic.

teeth impaction

see impacted teeth.