A medical implant comprising a plurality of layers, each layer comprising a polymer and a plurality of uni-directionally aligned continuous reinforcement fibers.

The invention relates to a screw (1), preferably a bone screw, comprising a shaft (2) with a tip (3), a head (4) and a thread (5). The shaft further comprises a longitudinal axis (A). An array of radial cross-sectional surfaces (Q) of the head (4) extend through the longitudinal axis (A) of the screw (1), the location of each radial cross-sectional surface (Q) being defined by an azimuth angle (6) in a plane (E) perpendicular to the longitudinal axis (A). Each radial cross-sectional area (Q) has an area defined by the longitudinal axis (A) and the outer surface of the screw (8). The thread (5) extends into the head (4) in such a way that the surface areas of the radial cross-sectional surfaces (Q′) in a first azimuth angle range (9) are constant and the surface areas of the radial cross-sectional surfaces (Q″) in a second azimuth angle range (10), which is different from the first, have a different, preferably smaller, value than the surface areas in the first azimuth angle range (9). The first azimuth angle range (9) is at most 350°, preferably at most 345°.

The invention relates to magnesium screws and screw-like devices for dental implant surgery and, more particularly, to magnesium and magnesium-based tenting devices for implementation in periosteal and gingival tissue overlying an alveolar ridge of a mandible or maxilla to provide vertical ridge augmentation, i.e., bone regeneration. The tenting devices may be composed of magnesium in dry form, such as metallic magnesium and salts thereof; or magnesium alloy including magnesium in dry form and at least one alloying element or compound; or magnesium-polymer composite including magnesium in dry form and at least one polymer.

Threaded sacro-iliac joint stabilization (e.g., fusion, fixation) implants and methods of implantation and manufacture. Some implants include a threaded distal region, an optionally threaded central region, and an optionally threaded proximal region. The distal, central, and proximal regions have lengths such that when the implant is laterally implanted across a SI joint, the distal region can be positioned in a sacrum, the central region can be positioned across an SI-joint, and the proximal region can be positioned in an ilium.

One aspect of the present disclosure relates to a tissue integration device. The tissue integration device can be produced by forming a polymer mixture into a shape. The polymer mixture can include a polymer resin and a growth-promoting medium. Next, at least one polymer forming the polymer resin can be oriented in at least one direction. The shaped polymeric material can then be formed into the tissue integration device.

Certain systems, methods, and devices described herein are configured to dynamically model a patient area for surgery and/or other treatment, dynamically identify one or more features and/or characteristics thereon such as the length and/or elasticity of the posterior longitudinal ligament (PLL), dynamically allow modification of the model, dynamically limit and/or assist in modification of the model, and/or dynamically generate guidelines for generation of patient-specific implants and/or treatment kits for a specific patient.

A bone stimulator (30,40,50,610,810,910), a bone stimulation system (200,600,800, 900) and method for bone fracture healing of a broken bone (930,830,630,55) in a body, which can speed up the healing rate. Accordingly, ultrasound (214) is used by the present system to power up the implanted bone stimulator (30,40,50,610,810, 910) for generating a stimulating electric current passing through a broken area (931, 831,631,56) in the broken bone (930,830,630,55) for bone fracture healing.

A high-strength absorbable internal fixation bone screw for a fracture. The bone screw is made of a degradable oriented polylactic acid section. A raw material for the oriented polylactic acid section is a poly(L-lactic acid). The specific optical rotation of the poly(L-lactic acid) is −155° to −160°. The section is made of the poly(L-lactic acid) through the processes of making a billet, orientation strengthening and quenching in order. The method for making the billet is plastic injection molding. The method for orientation strengthening is forging and pressing or extrusion. The section is turned, finely milled, or directly molded into the bone screw. The bone screw has high strength and a low rate of mechanical strength loss, ensures mechanical support during bone healing and sufficient healing time for an injured bone, has good biocompatibility, and can be degraded and absorbed.

A bone screw and method of using the same for immobilizing a joint, the bone screw including a screw head, an elongate shaft having a threaded outer wall and a helically-shaped slot extending through the outer wall and longitudinally along the shaft. The slot extends longitudinally along a middle section of the threaded outer wall, terminating short of the proximal and distal ends of the shaft, or the slot extends through the distal end and/or to the proximal end of the shaft immediately adjacent to the screw head. The slot includes a cutting edge that is arranged to engage bone when the screw advances therethrough for cutting away a portion of the bone. A reservoir is located within the elongate shaft for collecting bone that is cut away or removed by the cutting edge.

This disclosure describes exemplary screw and intramedullary devices that are better able to bring bone fragments into close proximity with each other, generate a compressive load, and maintain that compressive load for a prolonged period of time while healing occurs. The devices are made of a shape memory material.