The present invention discloses a bionic artificial interphalangeal joint. The bionic artificial interphalangeal joint includes three sets of proximal prostheses and distal prostheses matched with the proximal prostheses and respectively corresponding to the three joints from the metacarpal bone to the distal phalanx. According to the specific position of the joint to be replaced, the corresponding artificial interphalangeal joint can be selected for replacement. Among them, the bionic artificial interphalangeal joint that can be installed between the metacarpal bone and the proximal phalanx has multiple degrees of freedom, which allows the proximal phalanx to bent in any direction like a real finger, and the bending angle of the proximal phalanx can be up to about 90 degrees when the proximal phalanx is bent toward the inner side of the finger.

A load dissipating arthroplasty prosthesis comprising a shell, an articular device extending into the shell through a collar defined in the sell, a head and neck portion of the articular device extending from the collar, a shaft portion of the articular device extending into the shell, and a plurality of shock absorbing arcuate linkers spacing and allowing limited movement between the shell and the articular device.

A bone cap (100) for preventing leakage of medullary canal components in a residual limb (102) that can lead to pathologies such as heterotopic ossification reducing heterotopic ossification and a method for using the same are provided. The bone cap (100) includes a proximal base (114) and an insertion extension portion (116) extending from the proximal base (114). The insertion extension portion (116) has an outer surface and a distal end (112b) opposite the proximal base (114). The insertion extension portion (116) is configured to be inserted into a resected portion of a bone (104) of a patient. The bone cap (100) also has at least one bone engaging feature (120) disposed on the outer surface of the insertion extension portion (116) adjacent to the distal end (112b) of the insertion extension portion (116). A porous coating (122) is disposed on the outer surface of the insertion extension portion (116) adjacent to the proximal base (114).

An intervertebral implantation system for restoring disc height and vertebral alignment, while allowing dynamic mobility and stabilization of the vertebral segment, and minimally invasive methods of implanting the same. The implantation system includes an annular reinforcement implant, including an elastomeric balloon inserted into the hollow or interior of a tubular sleeve, and secured only at a first and second neck portions to a securement element coupled to an attachment fixture, forming an annular structure attached to the outer margin of the annulus fibrosus. When the prosthetic implant is in a contracted state the tubular sleeve is redundant and undulated, forming folds, gathered loosely around the circumference of the inner balloon. Upon pressurized inflation with in-situ curable polymer, the elastomeric balloon elongates and expands circumferentially, and the tubular sleeve stretches and unfolds, constraining further expansion and elongation of the elastomeric balloon. The attachment fixture is configured to provide secure attachment to the outer margin of the annulus fibrosus. A temporary, high pressure vertebral distraction balloon is utilized to aid in vertebral distraction during a surgical procedure to implant the annular reinforcement implant.

An expandable, intervertebral spacer includes a top component and a base component in engagement with the top component, the base component defining at least one channel for receiving a hardening material, and placement of the hardening material within the channel causes the top component to move between a first position in which the top component is a first distance from the base component and a second position in which the top component is a second distance from the base component, the second distance being greater than the first distance. The hardening material can be removed from the channel by a flexible coring tool, and the top component forced toward the base component to collapse the spacer.

Interbody cages for spinal stabilization having a frame that surrounds a central compartment suitable for retaining biological material, such as bone graft material. The central compartment acts as a spill-free bone and biologic compartment that allows a surgeon to introduce the interbody cage into the body in an effective manner without spilling the biological material. Methods for introducing the interbody cages are disclosed.

A selectively expanding spine cage has a minimized cross section in its unexpanded state that is smaller than the diameter of the neuroforamen through which it passes in the distracted spine. The cage conformably engages between the endplates of the adjacent vertebrae to effectively distract the anterior disc space, stabilize the motion segments and eliminate pathologic spine motion. Expanding selectively (anteriorly, along the vertical axis of the spine) rather than uniformly, the cage height increases and holds the vertebrae with fixation forces greater than adjacent bone and soft tissue failure forces in natural lordosis. Stability is thus achieved immediately, enabling patient function by eliminating painful motion. The cage shape intends to rest proximate to the anterior column cortices securing the desired spread and fixation, allowing for bone graft in, around, and through the implant for arthrodesis whereas for arthroplasty it fixes to endpoints but cushions the spine naturally.

Interbody cages for spinal stabilization having a frame that surrounds a central compartment suitable for retaining biological material, such as bone graft material. The central compartment acts as a spill-free bone and biologic compartment that allows a surgeon to introduce the interbody cage into the body in an effective manner without spilling the biological material. Methods for introducing the interbody cages are disclosed.

An expandable, intervertebral spacer includes a top component and a base component in engagement with the top component, the base component defining at least one channel for receiving a hardening material, and placement of the hardening material within the channel causes the top component to move between a first position in which the top component is a first distance from the base component and a second position in which the top component is a second distance from the base component, the second distance being greater than the first distance. The hardening material can be removed from the channel by a flexible coring tool, and the top component forced toward the base component to collapse the spacer.

In some aspects, a device comprising an implant configured for insertion into a portion of human anatomy, and at least one covering coupled to the implant is provided. According to some aspects, the implant comprises one or more protrusions configured to prevent leakage of material and/or to resist displacement of the implant. According to some aspects, the covering is configured to facilitate improved leakage and/or implant displacement prevention.