A wrist endoprosthesis (2) for functional replacement of the human wrist, containing a radius component (4) that has a shaft (10) for anchoring in the radius, a head (12), and a first joint surface (16), which is implemented on a distal head face (14), and a carpal component (6) that has a proximal carpal face (22), a distal carpal face (20) and a second joint surface (24) which is formed on the proximal carpal face (22) and interacts with the first joint surface (169) of the radius component (4), characterized in that the carpal component (6) is substantially trough-shaped, in order to at least partially surround the carpal bones. Also, a wrist endoprosthesis (2) that has anti-luxation protection (8), a method for producing wrist endoprostheses (2) and a computer program product.

Provided herein is an IVRO surgical guide for positioning a cutting guide on a mandibular ramus such that the mandibular ramus is clamped between a hooked distal end and a slidable component having a curved claw. The cutting guide is placed at a predetermined distance from the posterior edge of the ramus at the mid-waistline of the mandibular ramus along a curvilinear shaft in contact with the lateral surface of the ramus. The cutting guide can accommodate a saw for performing the osteotomy.

The disclosure provides a fixation device for internal fixation of an osteotomy below the tibial tuberosity. The fixation plate including a top-end portion including three pinholes, three screw holes, and a first Combi hole; a bottom-end portion including a second Combi hole, two screw holes, and one pinhole; and a connection portion connecting the top-end portion to the bottom-end portion. The top-end portion is capable of fixating the portion of the tibia above a cut of the osteotomy, and the bottom-end portion is capable of fixating the portion of the tibia below the cut.

A fixation plate for securing an opening formed in a bone is provided. The fixation plate includes: a body securable to the bone, the body having a bone interface side and an outward facing side; and a wedge element extending from the bone interface side of the body for inserting into the opening formed in the bone. The wedge element is shaped to conform to contours of the opening formed in the bone. In some embodiments, the wedge element is provided with an evolutive canal. A corresponding method for designing a patient-specific fixation plate is also provided.

The surgery of revision knee arthroplasty is complex one for both of one and two stages for constraint and hinged implants. The inventor create a method and device to overcome the difficulties of this surgery as determining the size of the revision prosthesis and position of it on the bone after cut and replacement of the failed primary prosthesis. This method enable the surgeons to overcome the abnormalities, distortions and artifacts on bone surface which resulted from the CT scan due to the primary implant. It enables the surgeons to detect the size and position of the implant, also uses land marks on bone surface to design and product the device which use to perform the bone cutting. The device enables the surgeon to determine and guiding the bone cuts below the cement plane in case of cemented implants. Also guiding to the bone cuts below the implant surface in case of cement-less implants.

A disposable guide device for spinal surgery comprises two tubular guide bodies extending along respective main axes between a proximal end and a distal end to guide a surgical operation on a vertebra of a patient, a plurality of support feet projecting laterally relative to each guide body, near said proximal end, each defining a contact area configured to abut on a side of the spinous process or on a lamina or facet or transverse process of the vertebra of the patient, in a mating configuration, at least one junction element extending between the guide bodies, starting from the respective distal ends, in order to space them from each other, wherein the guide bodies are oriented so that the proximal ends are more distant from each other with respect to the distal ends.

Methods may be provided to identify a medical implant from a plurality of medical implants to be fixed to an anatomical surface. Dimensional parameters for each of the plurality of medical implants may be provided, and dimensional parameters corresponding to the anatomical surface may be provided. The dimensional parameters for each of the plurality of medical implants may be compared with the dimensional parameters corresponding to the anatomical surface, and one of the medical implants may be selected from the plurality of medical implants based on comparing the dimensional parameters for each of the plurality of medical implants with the dimensional parameters corresponding to the anatomical surface. An identification of the medical implant selected from the plurality of medical implants may be provided through a user interface. Related devices and computer program products are also discussed.

According to some embodiments, the process includes the steps of: a) taking a sagittal preoperative x-ray of the vertebral column of the patient to be treated, extending from the cervical vertebrae to the femoral heads; b) on that x-ray, identifying points on S1, S2, T12 et C7; c) depicting, on the said x-ray, curved segments beginning at the center of the plate of Si et going to the center of the plate of C7; e) identifying, on that x-ray, the correction(s) to be made to the vertebral column, including the identification of posterior osteotomies to make; f) pivoting portions of said x-ray relative to other portions of that x-ray, according to osteotomies to be made; g) performing, on said x-ray, a displacement of the sagittal curvature segment extending over the vertebral segment to be corrected; h) from a straight vertebral rod (TV), producing the curvature of that rod according to the shape of said sagittal curvature segment in said displacement position.

A bone preparation guide including a first patient-specific portion based on image data of a specific patient's bone and configured to match the patient's specific bone surface. A second patient-specific portion is based on image data of the specific patient's bone and configured to match the patient's specific bone surface. A patient-generic portion is configured to be a bone-facing portion supported by the first and the second patient-specific bone contacting members at a portion of the patient's bone surface not imaged during preparation of a preoperative plan.

An orthognathic bone joining or positioning implant method for performing an osteotomy and subsequent rejoining of one or more separated bone sections to the bone in a desired repositioning, wherein the implant is manufactured such that it provides a separating tool guidance contour for separating the bone sections after attaching a first attachment area to the bone, and provides a second or third attachment area for attaching the separated bone sections to the bone in the desire repositioning without detaching said first attachment area. The method utilizes tomographic imaging to produce a target 3D model of the bone showing the repositioned bone sections based on the original 3D model of the bone.