Antibacterial coatings and methods of making the antibacterial coatings are described herein. A first branched polyethylenimine (BPEI) layer is formed and a first glyoxal layer is formed on a surface of the BPEI layer. The first BPEI layer and the first glyoxal layer are cured to form a crosslinked BPEI coating. The first BPEI layer can be modified with superhydrophobic moieties, superhydrophilic moieties, or negatively charged moieties to increase the antifouling characteristics of the coating. The first BPEI layer can be modified with contact-killing bactericidal moieties to increase the bactericidal characteristics of the coating.

A natural and sustainable material is derived from the nut of the tagua palm tree that may be fashioned into devices for humans and animals. A pulverized and reconstituted material is disclosed herein that is also treated with a low temperature atmospheric plasma treatment. In an embodiment, a biocompatible carrier gas is ionized to form a biocompatible atmospheric plasma stream. Material, such as nano-scale powdered hydroxyapatite, is introduced into the plasma stream, which is then applied to the natural nut material.

A natural and sustainable material is derived from the nut of the tagua palm tree that may be fashioned into devices for humans and animals. A pulverized and reconstituted material is disclosed herein that is also treated with a low temperature atmospheric plasma treatment. In an embodiment, a biocompatible carrier gas is ionized to form a biocompatible atmospheric plasma stream. Material, such as nano-scale powdered hydroxyapatite, is introduced into the plasma stream, which is then applied to the natural nut material.

A system and method for sharing and absorbing energy between body parts. In one particular aspect, the system facilitates absorbing energy between members forming a joint such as between articulating bones.

According to one example, an adjustable cut guide for resecting a bone can include a base, a cam, an actuator, and an insert. The base can include a channel extending between a first end and a second end and a slot intersecting the channel. The cam can extend into the slot, and the cam can be coupled to the base within the slot to rotate between a first position and a second position. The actuator can be disposed in the slot, where the actuator can be translatable by rotation of the cam between an extended position when the cam is in the first position and a retracted position when the cam is in the second position. The insert can be disposed within the channel of the base and the insert can be secured relative to the base by the actuator when the actuator is in the extended position.

A patient specific guide for hip replacement for patients undergoing hip replacement surgery. The guide works for correction of the acetabulum defects based on a finite element model, which detect the bone quality and guide the surgeons for the optimum screws trajectories. The guide surface reflects the acetabular morphology which provide a correct posting of the cup, especially for the complex case as bone loss, severe fractures and tumors. CT-scan images are used to construct the 3D model of the acetabulum bone, therefore a finite element and virtual surgery planning methods are applied to create the electronic file of the patient specific guide. In final step, the 3D printers are used to produce the patient specific guide.

A patient specific guide for hip replacement for patients undergoing hip replacement surgery. The guide works for correction of the acetabulum defects based on a finite element model, which detect the bone quality and guide the surgeons for the optimum screws trajectories. The guide surface reflects the acetabular morphology which provide a correct posting of the cup, especially for the complex case as bone loss, severe fractures and tumors. CT-scan images are used to construct the 3D model of the acetabulum bone, therefore a finite element and virtual surgery planning methods are applied to create the electronic file of the patient specific guide. In final step, the 3D printers are used to produce the patient specific guide.

A method of preparing a tarsometatarsal joint can include imaging a tarsometatarsal joint of a patient between a metatarsal and a cuneiform to determine a size and/or angle of a wedge-shaped bone portion to be cut at the tarsometatarsal joint. The method can include obtaining a bone preparation guide that includes a first guide surface positionable over the metatarsal and a second guide surface positionable over the cuneiform, where an angle of the first guide surface relative to the second guide surface is selected corresponding to the size and/or angle of the wedge-shaped bone portion to be cut as determined via imaging of the tarsometatarsal joint. The method can include positioning the guide surfaces over the metatarsal and cuneiform and guiding a tissue removing instrument with the guide surfaces to cut an end of the metatarsal and to cut an end of the cuneiform.

A method of designing a pair of fixation rods for implantation on a patient's spine includes: modelling the spine: determining a corrected vertebrae position; modelling the corrected spine by: realigning the vertebrae in the frontal plane, rotating the sacral plateau in the sagittal plane, modifying angulation in the sagittal plane between the adjacent plates of the discs, changing angulation between one or two vertebrae in the sagittal plane, and modifying the height of each disc; calculating a point cloud passing through the centers of the vertebral bodies; deducing two point clouds on either side of the first, spaced in the frontal plane by the width of the vertebra multiplied by X, and located in the sagittal plane at a distance equivalent to the depth of the vertebra in the sagittal plane multiplied by Y, X and Y being a function of the instrumentation connecting the rod to the spine.

A method of designing a pair of fixation rods for implantation on a patient's spine includes: modelling the spine: determining a corrected vertebrae position; modelling the corrected spine by: realigning the vertebrae in the frontal plane, rotating the sacral plateau in the sagittal plane, modifying angulation in the sagittal plane between the adjacent plates of the discs, changing angulation between one or two vertebrae in the sagittal plane, and modifying the height of each disc; calculating a point cloud passing through the centers of the vertebral bodies; deducing two point clouds on either side of the first, spaced in the frontal plane by the width of the vertebra multiplied by X, and located in the sagittal plane at a distance equivalent to the depth of the vertebra in the sagittal plane multiplied by Y, X and Y being a function of the instrumentation connecting the rod to the spine.