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 ?
Percutaneous fiducial marker implantation under sonographic guidance was performed for them before radiation therapy.
Some 20% of women needed surgical procedures to treat complications within the first 2 years of mastectomy, a rate that is nearly four times higher than that with cosmetic implantation.
s (2003) criticism of our paper involved our discussion of the possible causes of decreased implantation sites in treated animals shown in our original Figure 2 (Cavieres et al.
Since 1988, several reviews [1-4] of complications associated with cochlear implantation have been published, including a comprehensive report by Hoffman and Cohen in l995.
Topics covered include product definitions, revenue and implantation projections, strategies, competitive analysis, key market and product segment parameters, disease incidence and prevalence, market share rankings, competitive position maps, market conditions, brands and models, and company profiles.
Although the test data were tabulated according to season and a seasonal influence on test outcome was noted, the data were merged for all cases where implantation data existed [Figure 2 (Cavieres et al.
The successful implantation of the Sideguard[TM] stents in human patients is a breakthrough in the treatment of ostial-bifurcated lesions," stated Professor Grube.
The study is the only one that offers both one- and two-level implantation of a cervical disc.
As we simplify the implantation and explantation process, we make our recovery VADs more likely to be used as the standard of care for cardiogenic shock at all surgery centers," said Michael R.
SafeFlo(TM)'s unique low profile, vessel friendly and non-tilt design offers simple and safe filter implantation potentially enabling bedside filter implantation under ultrasound guidance.
CryoLife's SynerGraft technology incorporates the use of a porcine heart valve which is depopulated of its cells and is expected by the Company to repopulate following implantation with the cells of the heart valve recipient, producing a bio-engineered human heart valve similar to the patient's own heart valve.