A prosthetic disc can take the form of a sensing artificial disc that includes a resilient core and at least one sensor configured to sense one or more conditions within and/or experienced by the disc. The sensing artificial disc can serve as a replacement to a failed or injured disc between two vertebrae of a spine. The sensing artificial disc can include at least one element configured to change a condition or property of the resilient core in response to a condition sensed by the at least one sensor. A prosthetic disc can include therapeutic system configured to deliver medication to the body, which can include a reservoir of medication.

Hip replacement prosthesis are provided, comprising a femoral stem, a femoral head coupled to the femoral stem, and an acetabular assembly coupled to the femoral head, and a plurality of sensors coupled to at least of the femoral stem, femoral head, and acetabular assembly.

Methods, systems, and devices for heating orthopedic implants are disclosed. The system includes an orthopedic implant receiving heat from a heating device. The heating device includes a heating element and a casing supporting or housing the heating element. A control unit provides precise and reliable operation of the heating element by managing power delivery, regulating temperature, and ensuring safe and effective functioning of the heating device during orthopedic surgical procedures. The casing is shaped and dimensioned for engagement with an orthopedic implant. Briefly, according to the method, resistive heat is applied to the orthopedic implant by first accessing an exposed implant surface, applying a retractor instrument to aid in exposure of the orthopedic implant and protection of surrounding soft tissues, attaching a heating device to the exposed implant surface, and activating the heating device.

An interbody spacer configured for implantation between spinal vertebrae. The interbody spacer including electrical circuitry within an electronics housing of the interbody spacer and a plurality of load sensors spaced apart on carriers of the interbody spacer. The plurality of load sensors electrically connectable to the electrical circuitry and configured to provide to the electrical circuitry a load signal indicative of a measurement of force exerted onto the plurality of load sensors of the interbody spacer. The interbody spacer further including a plurality of electrodes spaced apart on a surface of the interbody spacer. The plurality of electrodes electrically connectable to the electrical circuitry and configured to at least one of provide to the electrical circuitry an electrode signal indicative of an impedance measurement and generate an electrical field between at least two electrodes of the plurality of electrodes.