Implantation


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implantation

[‚im‚plan′tā·shən]
(medicine)
Placement of a tissue transplant in depth in the body.
Placement in the body of a device for mechanical repair, such as for a ventral hernia or a fracture.
Embedding of an embryo into the endometrium.

Implantation

 

the attachment of the embryo to the wall of the uterus in man and in all mammals with intrauterine development.

Three types of implantation are distinguished: superficial implantation, in which the embryo remains in the uterine cavity and attaches itself to the wall either by the entire surface of the trophoblast or by part of it (in Chiroptera and ruminants); eccentric implantation, in which the embryo deeply penetrates a fold of the uterine mucosa (a uterine crypt), the wall of which then grows together over the embryo and forms an implantation chamber that is isolated from the uterine cavity (in rodents); and interstitial implantation, characteristic of higher mammals (primates and man), in which the embryo destroys cells of the uterine mucosa and implants itself within the cavity formed, the uterine defect then healing and the embryo embedding itself totally within the uterine wall, where its subsequent development occurs.

References in periodicals archive ?
AEROSPACE SALES BY PRODUCT, 2010-2014 ($ BILLIONS) 117 TABLE 77 CHEMICAL VAPOR DEPOSITION AND ION-IMPLANTATION APPLICATIONS IN THE INDUSTRIAL MARKET 120 TABLE 78 MATERIALS DEPOSITED BY CHEMICAL VAPOR DEPOSITION FOR INDUSTRIAL APPLICATIONS 121 TABLE 79 MATERIALS USED FOR ION IMPLANTATION IN THE INDUSTRIAL MARKET 122 TABLE 80 GLOBAL CHEMICAL VAPOR DEPOSITION AND ION-IMPLATATION THIN-FILM EQUIPMENT TECHNOLOGY GROWTH TRENDS IN THE INDUSTRIAL SECTORS, THROUGH 2019 ($ BILLIONS/$ MILLIONS/%)
As one of the six PD catheter implantation coordinating sites, the following key deliverables were met:
should be an essential part of adequate informed consent" for mastectomy patients seeking breast implantation, Dr.
Both implantation and resorption data are plotted in the new Figure 1 as difference from control: the decrease from control in the case of implantations, and the increase from control in the case of resorptions.
Varian Semiconductor Equipment Associates is the leading producer of ion implantation equipment used in the manufacture of semiconductors.
It is a reasonable assumption that, after conception, the pill can cause the death of the embryo (fertilized ovum) prior to or during implantation (the nesting of the embryo in the wall of the uterine cavity).
While the new findings may help identify children who are most likely to benefit from cochlear implantation, the team notes that the implants can improve communication ability even in children with poor speech perception.
Because ion implantation is a non-equilibrium process, the nitrogen concentration in the near-surface is as high as 50 atomic percent-much higher than can be achieved by thermal nitriding.
Ion implantation avoids use of high temperatures, thus avoiding this problem.
Healon brand viscoelastics (Healon, Healon GV, Healon 5), clear ophthalmic viscosurgical device (OVD), trusted for more than 30 years for use as a surgical aid in cataract extraction, intraocular lens (IOL) implantation, corneal transplant, and glaucoma filtration surgery;
The authors concluded that, although apparently influenced by season, the results showed an inverted or U-shaped dose-response pattern for reduced litter size and reduced implantation sites.

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