retraction


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to retraction: clot retraction

retraction

 [re-trak´shun]
the act of drawing back, or condition of being drawn back.
clot retraction the drawing away of a blood clot from the wall of a vessel, a stage of wound healing caused by contraction of platelets; it is a function of blood platelets that can be tested to assess platelet viability.

re·trac·tion

(rē-trak'shŭn),
1. A shrinking, drawing back, or pulling apart.
2. Posterior movement of teeth, usually with the aid of an orthodontic appliance.
[L. retractio, a drawing back]

retraction

Internal medicine A hollowing of tissue in the neck and intercostal spaces due to negative intrathoracic pressure, a classic sign of severe asthma. See Asthma Surgery The drawing of tissues away from a particular site to open an operative field.

re·trac·tion

(rĕ-trak'shŭn)
1. A shrinking, drawing back, or pulling apart.
2. Posterior movement of teeth, usually with the aid of an orthodontic appliance.
[L. retractio, a drawing back]

re·trac·tion

(rĕ-trak'shŭn)
1. Posterior movement of teeth, usually with aid of an orthodontic appliance.
2. A shrinking, drawing back, or pulling apart.
[L. retractio, a drawing back]
References in periodicals archive ?
The aim of this trial was to evaluate the rate of canine retraction in maxillary first premolar extraction patients with or without flapless cortical perforations (FCPs) made with a miniscrew.
On appeal, the Department overturned retractions where an annual review was provided in lieu of a quarterly review.
To determine the incidence of cholesteatoma from TM retraction during the study period, an institutional pathology database was cross-referenced to identify all diagnoses of cholesteatoma arising within the initial cohort of 76 retracted TMs.
Thereafter, a mini-screw (Miniscrews AbsoAnchor, Dentos, Daegu, Korea; diameter, 1.3 mm; length 8 mm) was placed between the first molar and the second premolar and R&T arch with an anterior segment of .016x.022, and a torque value of 45[degrees] was applied for the retraction of incisors.
Its aetiologies can be classified into those that relate to the paralysis of orbicularis oculi (paralytic lagophthalmos --see Table I) and those that cause retraction of the upper or lower lids (restrictive lagophthalmos--see Table 2, page 70).
The retractions follow another sweep by the publisher last year, when Tumor Biology retracted 25 papers for compromised review and other issues, mostly authored by researchers based in Iran.
It is important to note that due to the possibility of adjusting the swift for every single article, the parameters may be optimized in such a way that various types of yarns have the perfect retraction margin during the dyeing phase, thus ensuring a high percentage of residual elasticity of the elasticized yarn after dyeing.
KEY WORDS: Academic publications, Pressure to publish, Plagiarism, Retraction, Research ethics, Medical field.
Sonomicrometry and EMG data were categorized into three locomotory behaviors: escape jetting (characterized by blanching of the chromatophores, rapid head extension and retraction, and rapid mantle contraction); ventilation (characterized by slow, rhythmic extension and retraction of the head, and slow, rhythmic contraction and expansion of the mantle); and slow swimming (characterized by relatively slow, though variable head extension and retraction, and variable rates of mantle contraction).
He suggested that inflammatory changes with resultant enlargement and fibrosis of the levator muscle might cause the retraction. It was unique for our patients that their inflamed eyes appeared normal without retraction.
According to JAMA's retraction statement, the first author of the article admitted to data fabrication following an internal investigation.
Central tympanic membrane perforation was found in 6.5% of the cases; perforation-retraction, in 17.4%; moderate or severe retraction, in 28.3%; and cholesteatoma, in 28.3%.