| impacted | Driven together or close. <surgery> Impacted fracture, a fracture in which the fragments are driven into each other so as to be immovable. Source: Websters Dictionary (01 Mar 1998) |
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| impacted foetus | A foetus which, because of its large size or narrowing of the pelvic canal, has become wedged and incapable of spontaneous advance or recession. (05 Mar 2000) |
| impacted fracture | A fracture in which one of the fragments is driven into the cancellous tissue of the other fragment. (05 Mar 2000) |
| impacted teeth | <dentistry> Teeth that have not fully erupted into their normal position. (15 Nov 1997) |
| impacted tooth | <dentistry> A tooth which is within the alveolus (the tooth socket within the alveolar bone of the jaw) and is prevented from erupting into its normal position. (27 Sep 1997) |
| tooth, impacted | A tooth that is prevented from erupting by a physical barrier, usually other teeth. Impaction may also result from orientation of the tooth in an other than vertical position in the periodontal structures. (12 Dec 1998) |
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| feces, impacted | A large firm mass of stool formed in the rectum or distal colon. (12 Dec 1998) |