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WikiDoc Resources for Impaction


Most recent articles on Impaction

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Review articles on Impaction

Articles on Impaction in N Eng J Med, Lancet, BMJ


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Evidence Based Medicine

Cochrane Collaboration on Impaction

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Clinical Trials

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Trial results on Impaction

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Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Impaction

NICE Guidance on Impaction


FDA on Impaction

CDC on Impaction


Books on Impaction


Impaction in the news

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Blogs on Impaction


Definitions of Impaction

Patient Resources / Community

Patient resources on Impaction

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Patient Handouts on Impaction

Directions to Hospitals Treating Impaction

Risk calculators and risk factors for Impaction

Healthcare Provider Resources

Symptoms of Impaction

Causes & Risk Factors for Impaction

Diagnostic studies for Impaction

Treatment of Impaction

Continuing Medical Education (CME)

CME Programs on Impaction


Impaction en Espanol

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Impaction in the Marketplace

Patents on Impaction

Experimental / Informatics

List of terms related to Impaction

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Impaction, from the Latin impingere, is a medical term used to describe several different types of blockage.

In relation to Digestion

See also: fecal impaction

Impaction is a pathological condition in humans when an impassable mass of stone-like faecal matter collects in the rectum. It frequently occurs as a result of dehydration, inactivity, and medications, such as narcotics or psychotropicagents, which slow the peristalsis, and increase the time that the colonic mucosa will extract moisture from the faecal bolus. [1]


Treatment involves attempts at moving the impaction by enema and, failing that, breaking up the impaction transrectally by using a (gloved) finger, pressing the mass against the coccyx to fracture it into smaller pieces. Proceeding this, A follow-up enema is usually required in addition to proper ongoing hydration, bulk in the diet, exercise and review of all medications to discontinue all those responsible is important to prevent recurrence. [1]

Impaction is also used, in conjunction with filtration, to remove large dust particles and other foreign objects as they enter the body through the nose.

Dental Impaction

See also: Wisdom teeth

Informal Definition

Dental impactions are often known to occur when there is not enough room in the jaw for new molar teeth to erupt properly. This can lead to a variety of dental problems, including cysts. There are several types of dental impaction [2]