WordNet

a disorder in which a tooth is so crowded in its socket that it cannot erupt normally (同)impacted_tooth
a disorder in which feces are impacted in the lower colon
the condition of being pressed closely together and firmly fixed
press or wedge together; pack together
a forceful consequence; a strong effect; "the book had an important impact on my thinking"; "the book packs a wallop" (同)wallop
the striking of one body against another
the forcing of molten rock into fissures or between strata of an earlier rock formation
entrance by force or without permission or welcome
rock produced by an intrusive process
the condition of being folded inward or sheathed (同)introversion
the folding in of an outer layer so as to form a pocket in the surface; "the invagination of the blastula" (同)introversion, intussusception, infolding
sheathe; "The chrysalis is invaginated"
fold inwards; "some organs can invaginate" (同)introvert

PrepTutorEJDIC

〈U〉〈C〉(…の…に対する)衝突,衝撃《+『of』+『名』+『against』(『on』,『upon』,『with』)+『名』》 / 〈C〉(…の…に対する)影響(influence)影響力《+『of』+『名』+『on』(『upon, against』)+『名』》
(意見などを人に)押しつけること《+『of』+『名』+『upon』+『名』》 / (…の)じゃまをすること;(…を)侵害すること《+『on』(『upon』)+『名』》

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/11/28 17:48:24」(JST)

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Look up impaction in Wiktionary, the free dictionary.

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

In Reptiles

Impaction occurs in reptiles when they consume something that they cannot digest. Common causes of impaction are rocks and sand which might be accidentally consumed when the reptile attacks its prey. Once the substance is ingested it will block the digestive tract and, if untreated, cause death.

Symptoms

Some symptoms include a lack of appetite or lethargy. On many animals a large blue seemingly bruised spot will be visible in the abdomen; however, this only shows through if the skin on the animal is clear enough to see the lower internal organs.^[1]

Treatment

Common treatments involve placing the animal in a lukewarm bath and gently rubbing the area under the impaction to help the passing of the consumed substance, place both thumbs on the back at the middle, put the first two fingers under the belly and rub gently in a circular way until the beaded dragon puffs up, when the lizard puffs up it will go the loo. If this fails, the animal must have an enema.^[1]

In Horses

An impaction may be a cause of colic; see horse colic.

In Humans

In relation to Digestion

Main article: 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 psychotropic agents, which slow the peristalsis, and increase the time that the colonic mucosa will extract moisture from the faecal bolus.^[2] Impaction may also occur as a result of consuming excessive amounts of sunflower seed shells, as confirmed by the National Sunflower Association.^[3]

Treatment

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.^[2]

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

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 ^[4]

References

^ ^a ^b The Reptile Rooms :: Bearded Dragons, other Lizards, Snakes, Turtles and more!
^ ^a ^b MedlinePlus Medical Encyclopedia: Fecal impaction
^ National Sunflower Association
^ Wisdom teeth removal, extraction - symptoms, pain & complications

UpToDate Contents

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1. 高齢者における便秘 constipation in the older adult
2. Chronic functional constipation and fecal incontinence in infants and children: Treatment
3. 幼児および小児における急性便秘の予防および治療 prevention and treatment of acute constipation in infants and children
4. 小児における耳痛の評価 evaluation of earache in children
5. 耳垢 cerumen

English Journal

Efficacy of CBCT for assessment of impacted mandibular third molars: a review - based on a hierarchical model of evidence.

Matzen LH1, Wenzel A.
Dento maxillo facial radiology.Dentomaxillofac Radiol.2015;44(1):20140189. doi: 10.1259/dmfr.20140189.
A radiographic examination of mandibular third molars is meant to support the surgeon in establishing a treatment plan. For years panoramic (PAN) imaging has been the first choice method; however, where an overprojection is observed between the third molar and the mandibular canal and when specific
PMID 25135317

BET 1: use of glucagon for oesophageal food bolus impaction.

[No authors listed]
Emergency medicine journal : EMJ.Emerg Med J.2015 Jan;32(1):85-8. doi: 10.1136/emermed-2014-204467.1.
A shortcut review was carried out to establish whether intravenous glucagon is a safe and effective treatment for patients with suspected lower oesophageal food bolus impaction. Seven studies were directly relevant to the question. The author, date and country of publication, patient group studied,
PMID 25511630

Water intake, faecal output and intestinal motility in horses moved from pasture to a stabled management regime with controlled exercise.

Williams S1, Horner J, Orton E, Green M, McMullen S, Mobasheri A, Freeman SL.
Equine veterinary journal.Equine Vet J.2015 Jan;47(1):96-100. doi: 10.1111/evj.12238. Epub 2014 Mar 21.
REASONS FOR PERFORMING STUDY: A change in management from pasture to stabling is a risk factor for equine colic.OBJECTIVES: To investigate the effect of a management change from pasture with no controlled exercise to stabling with light exercise on aspects of gastrointestinal function related to lar
PMID 24528106

Rare case of neglected pessary presenting with concealed vaginal hemorrhage.

Andrikopoulou M1, Lazarou G.
Female pelvic medicine & reconstructive surgery.Female Pelvic Med Reconstr Surg.2015 Jan-Feb;21(1):e1-2. doi: 10.1097/SPV.0000000000000063.
BACKGROUND: Vaginal pessaries are commonly used for management of pelvic organ prolapse. Severe complications can occur in neglected cases.CASE: A 91-year old woman with significant comorbidities presented with large concealed vaginal bleeding and history of vaginal pessary placement 14 years before
PMID 25185620

Japanese Journal

症例報告人工膝関節遅発性感染に対してimpaction bone graftingを併用した二期的再置換術の経験

加藤充孝,清水孝志
臨床整形外科 50(3), 287-290, 2015-03
NAID 40020381114

A Case of Impacted Tooth in the Maxillary Sinus: CT Findings

Sekiya Keiko,Ishida Marie,Sekiya Kotaro,Suemitsu Masaaki,Hara Yoshinobu,Kaneda Takashi
International Journal of Oral-Medical Sciences 13(3), 128-130, 2015
… However, impaction in the nose or maxillary sinus has rarely been reported. …
NAID 130005076110

下顎埋伏智歯が12年間で筋突起下方まで移動した1例

小野寺慧,松本直子,熊谷章子,星秀樹,杉山芳樹,及川大成,石橋修
日本口腔診断学会雑誌 28(1), 26-30, 2015
… Radiography revealed complete inverse impaction of the lower right third molar into a position inferior to the coronoid process, with a cyst-like radiolucent area including the crown spreading to the distal region of the lower right second molar.A radiograph from 12 years earlier showed that the lower right third molar was horizontally impacted distal to the lower right second molar. …
NAID 130005075357

Obstructive Uropathy Caused by Chronic Constipation

Iwata Yuri,Kunishi Yosuke,Yoshie Koichiro
Internal Medicine 54(9), 1043-1047, 2015
… This case highlights the importance of considering fecal impaction as a cause of urinary tract obstruction or infection. …
NAID 130005068309