The present invention relates to a guide module having oblique installation pins, the guide module including: a first installation pin unit penetratively inserted into one side of an aligned bone; a second installation pin unit penetratively inserted into the other side of the aligned bone; a reposition guide unit simultaneously penetrated by the first installation pin unit and the second installation pin unit and being simultaneously in contact with one side of the aligned bone and the other side of the aligned bone; and a compression guide unit disposed adjacent to the reposition guide unit and simultaneously penetrated by the first installation pin unit and the second installation pin unit, in which imaginary central axes of holes of the reposition guide unit penetrated by the first installation pin unit and the second installation pin unit are spaced apart, at a predetermined interval in a vertical direction, from imaginary central axes of holes of the compression guide unit. Therefore, the aligned bone may be compressed.

A bone shortening osteotomy apparatus is configured to provide positive retention of the bone portions as the two cut bone portions are retracted. The apparatus utilizes a bone plate with a compression block detachable attached in a fixed position and a sled assembly that is slidably engaged with the bone plate. A jacking screw extends from the sled to the compression block to draw these two components together. K-wire barrels coupled to the sled converge to direct K-wires into bone. Sled guide pins extend between the sled and the compression block and preferably on opposing sides of the jacking screw to ensure straight movement of the sled toward the compression block. A cutting guide has guide slots for guiding a cutting implement through the bone. A slot wedge may be inserted through the guide slot after cutting the bone to stabilize the cutting guide and bone for subsequent cutting.

The invention comprises a method for fixating bones in the foot by aligning the bones in their desired position, inserting a screw in the aligned bones, inserting at least one transverse element near the head or tip of the screw, and tightening the screw to compress the bones. The screw comprises a shaft having first and second ends with spirally wound screw threads beginning near the first end and extending along the shaft. Advantageously, the screw is cannulated and screw threads are formed on an interior surface of the cannulation. Illustratively, the transverse elements may be staples, open-ended washers, or open-ended nuts. Reduction instruments and drill guides used in the invention are also disclosed.

A bone positioning guide may be used as part of a bunion correction procedure. The bone positioning guide can include a bone engagement member configured to be positioned on a medial side of a first metatarsal of a foot and a tip separated from the bone engagement member by a distance effective to position the tip on a lateral side of a second metatarsal and in an intermetatarsal space between the second metatarsal and a third metatarsal. The bone positioning guide can also include a mechanism operable to reduce the distance between the bone engagement member and the tip, thereby causing the first metatarsal to move in at least a transverse plane to reduce an intermetatarsal angle between the first metatarsal and the second metatarsal.

A system for facilitating changing of a configuration of a bone having: a bone plate with a surface to overlie a surface of a bone; and a spacing assembly configured to be placed together with the bone plate selectively in: a) a cutting state wherein the spacing assembly maintains a gap region between at least a part of the bone plate surface and the bone surface which the bone plate surface is situated to overlie; and b) a second state wherein the at least part of the bone plate surface can be moved closer to the bone surface. A cutting component can be directed fully through a bone and into the gap region with the spacing assembly and bone plate in the cutting state. After the bone is cut, the bone plate and spacing assembly can be changed into the second state whereupon the bone plate can be placed against the bone surface in an operative position.

A method for correcting position of an osteotomy guide tool is disclosed. A trackable element mounted on the osteotomy guide tool or on the robotic arm tracks the position of the osteotomy guide tool and generates position information of the trackable element. According to the current position and the desired position of the trackable element, a robotic arm drives the osteotomy guide tool and the trackable element to move, until the trackable element is moved to the desired position. This method does not need to consider the absolute position accuracy of the robotic arm, and does not rely on the experience of the surgeon. The tool has several guiding features, which can provide guides for osteotomy operations, so that the same osteotomy guide tool can perform multiple operations of osteotomy and punching, thus greatly reducing the operation time and improving the operation efficiency.

A cut guide includes a first face and an opposed second face. The cut guide further includes a first aperture and a second aperture extending through the cut guide from the first face to the second face. The first and second apertures are configured to guide a surgical tool in cutting a bone. The cut guide further includes a first hole extending through the cut guide from the first face to the second face. The cut guide further includes a second hole extending through the cut guide. A central axis of the second hole is oriented at an acute angle to the second face. The first and second holes are configured to receive a wire to position the guide against the bone.

An orthopedic device for a shoulder joint includes a patient-specific alignment guide. The alignment guide includes a cap having a three-dimensional engagement surface customized in a pre-operative plan by computer imaging to be complementary and closely mate and conform to a humeral head of a proximal humerus of a patient. The alignment guide includes a tubular element extending from the cap and defining a longitudinal guiding bore for guiding an alignment pin at a patient-specific position and orientation determined in the pre-operative plan, and an orientation feature on the cap. The orientation feature is designed to orient the cap relative to the humeral head when the orientation feature is aligned with a landmark of the proximal humerus.

Systems, devices, and methods for performing Lapidus bunionectomy procedures are disclosed. An example method includes inserting a plurality of metatarsal pins into the first metatarsal at a first predetermined spacing relative to the first tarsometatarsal (TMT) joint, excising the first TMT joint by cutting the bases of the first metatarsal and the first cuneiform proximate the first TMT joint, inserting a plurality of cuneiform pins into the first cuneiform at a second predetermined spacing relative to the first TMT joint, compressing the first TMT joint using a compressor block such that a cut face of the first metatarsal contacts a cut face of the first cuneiform, and fixing the first TMT joint using a bone plate and a plurality of bone screws. At least one of the plurality of bone screws may be a cross screw extending at an angle of less than 90 degrees relative to the bone plate and may anchor the resected first TMT joint to the second metatarsal or the second cuneiform to prevent recurrence of the bunion.

A technique for correcting a bone deformity, such as a bunion, may be performed using a fulcrum. In some examples, the technique involves inserting a fulcrum between a first metatarsal that is anatomically misaligned with respect to a second metatarsal. The technique further includes preparing an end of the first metatarsal and preparing an end of a medial cuneiform opposing the end of the first metatarsal. In addition, a distal portion of the first metatarsal is moved toward the second metatarsal in a transverse plane, thereby pivoting a proximal portion of the first metatarsal about the fulcrum and reducing an intermetatarsal angle between the first metatarsal and the second metatarsal.