Conclusions: Coronary blood flow was significantly influenced by mechanical aortic valve implantation and the orientation of prostheses.
Conservative hip implants preserve healthy bone for revision surgeries and improve physiological loading; however, they have little supporting biomechanical data with respect to their 3D orientation during implantation.
A precise surgical technique is required in terms of implantation depth, position, and orientation because of the biomechanical properties of the ankle joint.
If the luminal closure could not happen normally, the embryo would lose positional clues in the uterine lumen and fail to establish the correct initial embryo orientation at implantation.
Since the axis of the lumen is in alignment with future embryonic axis, we have recently proposed that the on-time luminal closure is a critical factor that would guide and facilitate the correct embryonic orientation at initial implantation.
Most importantly, the abnormal luminal closure process was corrected in the Rbpj d/d mice following the ICI treatment, and the blastocyst was located at the normal implantation chamber with M-AM orientation on day 5, and the fertility of Rbpj d/d mice after ICI treatment showed a significant improvement regarding pregnancy rate and average litter size.
To further elucidate the origin of the defective embryo orientation at post-implantation stages, we performed detailed histological examinations coupled with immunofluorescence staining of E-cadherin or cytokeratin (epithelial markers) at the pre-implantation and initial implantation stages.
The recovery of auditory function in environmental perception and orientation references after cochlear implantation could initiate motor learning and, in this way, allow the implementation of new neural networks, leading to new sensorimotor and behavioral strategies.
Such precise deposition and orientation of the implanted material are particularly important when the implantation is aimed at small target structures like the substantia nigra in rats or mice.
Another strategy might be to preconstruct neural circuits in vitro ("neural wires"), or dissect out immature circuits, before their implantation to the brain, and implant them, intact, in their normal orientation, in vivo.
