Apparatus for measuring size of a cup for hip arthroplasty according to the present disclosure includes a scale plate marked with a scale to measure size, a first leg portion fixed to one end of the scale plate, and a second leg portion slidably moved relatively to the first leg portion along the scale plate, in which the second leg portion is marked with reading line. First and second jaws for contacting the cup are provided with 180° rotational symmetry on ends of the first and second leg portions, respectively. Central portions of the first and second jaws are bent to protrude in direction in which the first and second leg portions are farther away from each other, so that when contacting inner diameter of the cup, the jaws form one-point contact with the cup, and when contacting outer diameter of the cup, form two-point contact with the cup.

An instrumented linkage system (100) to facilitate accuracy and efficiency of a surgical procedure is disclosed. The linkage system may be directly attached to a bone and used to register the bone to a computer. The linkage system may also be used to verify the accuracy and alignment of planned resections relative to the bone.

A spacing device is provided for adjusting or measuring the spacing between adjacent vertebral bodies. The spacing device has a distal end with at least one distraction member adapted for insertion into an intervertebral disc space and movable between a low profile first configuration and a higher profile second configuration. Also provided is an actuator for moving the distraction member between the first configuration (for delivery of the distal end of the spacing device to a target disc space) and the second configuration (for manipulation or measurement of the space between adjacent vertebral bodies).

A measuring instrument (2) for use during an orthopaedic surgical procedure to measure first and second distances from a reference point on a bone to first and second measurement points respectively. The measuring instrument has a first scale (24) for displaying the first distance and a second scale (28) for displaying the second distance. It includes a mask (26) which can be positioned against the second scale after the first distance has been measured in a position that is selected relative to the second scale dependent on the measured first distance, to restrict the length of the second scale that is visible to the user.

An arrangement for the preparation of the proximal surface of the tibia for a tibial component of a prosthetic knee joint including a tibial and femoral stability gap preparation plate having a plurality of user operable height adjustable extension tabs that define a stability gap. A stability gap guide drill plate adapted to act as a guide for a drill bit to drill a series of bore holes into the proximal surface of the tibia to a depth commensurate with the height adjustment of the user operable height adjustable extension tabs and a stability gap router plate adapted to allow a router to complete a final bone resection on the surface of the tibia to rout or cut away bone about each of the series of bore holes so as to provide a stable balanced complete angular movement between a tibial component and a femoral component of the prosthetic knee joint throughout an arc of motion from extension, mid-flexion and flexion.

Systems, methods, and devices are disclosed for surgical systems comprising an applicator having a first shaft, an implant having a first member pivotably and detachably coupled to the first shaft, and a second member for converting rotational motion of the implant to a translational offset, and at least one of a sensor for determining the offset or an indicator for indicating the offset, provided that the indicator is not a protrusion located at an end of the applicator. A controller may be provided, the controller being configured to receive offset data from the sensor, determine an angle of the implant in a patient using dimensions of the implant and the offset, and display a current position of the implant relative to patient anatomy. The applicator may have a second shaft slidably disposed on the first shaft along an axis defined by a longitudinal axis of the applicator.

Systems and methods are provided for determining acceptable ranges of pressures for use by a robotic arm on a surgical instrument, robotic systems and methods that are limited to using the acceptable ranges of pressures, and the medical devices for use in the robotic surgery. Learning software is included in the methods and systems for correlating manually-performed procedures with pressure sensors as a tactile gauge for qualifying the acceptable ranges of pressures for use by a robotic system.

The present disclosure pertains to ankle prostheses. In an example embodiment, the ankle prosthesis comprises an adjustable and replaceable intermediate implant that is disposed between a tibial implant and a talar implant. The intermediate implant is adjustable relative to the tibial implant and can be interlocked therewith once adjusted. Methods of using, fitting, and adjusting the device are also described. Still other embodiments are described.

A modular surgical tool that is used to insert instruments into the intervertebral disc space of a patient to measure the height of the intervertebral disc space, to prepare the intervertebral disc space for an implant, and to insert the implant into the intervertebral disc space using a plurality of interchangeable tool ends. Advantageously, this modular surgical tool permits multiple insertion angles.

Instrumentation and methods are provided for knee arthroplasty which permit rotation of a distal femoral component in the sagittal plane. A guide provides for determination of both a femoral component size and rotation angle at which to install the implant in any specific patient.