The present disclosure includes devices, apparatuses, kits, and methods for replacing a nucleus pulposus of an intervertebral disc with an implantable nuclear prosthesis filled with a curable silicone material in situ. Configurations of the present spinal implant devices include a flexible body defining an outer fillable enclosure that defines an outer chamber, an inner fillable enclosure that defines an inner chamber, and a proximal plug configured to be coupled to the inner fillable enclosure.

According to an embodiment a combined hard and/or soft tissue medical implant may be provided for orthopedic and neurosurgical management of disease. The medical implant may further include an integrated reservoir, embedded pump-assisted smart technology, a strategic high-profile port for easy and safe access just underneath the neighboring skin, and one or more embedded catheters to deliver medication or cellular therapies.