Expandable prosthetic devices used for treating a variety of conditions, including rotator cuff injuries, broken and/or depressed bone fractures, infection and/or inflammation in the body. In one embodiment, a prosthesis includes an implant having a pressure regulating valve. The implant is capable of being positioned between a first tissue and an opposing second tissue in a void space and of deforming under pressure in response to articulation of a joint. The pressure regulating valve is configured to open based on a predetermined pressure in the implant.

Disclosed are a self-switching transmission assembly, a balloon, and a prosthesis for use in a shoulder joint. The self-switching transmission assembly comprises: a communicating tube (11, 11′, 11″) comprising an input end (111, 111′, 111″) and an output end (112, 112′, 112″); an external connection tube (12, 12′, 12″), an end portion thereof being insertable into the communicating tube (11, 11′, 11″) from the input end (111, 111′, 111″) and removable from the communicating tube (11, 11′, 11″) from the input end (111, 111′, 111″); and a sealing tube (13, 13′, 13″), which can be placed in a tube body of the communicating tube (11, 11′, 11″) and moved axially relative to the tube body of the communicating tube (11, 11′, 11″). The sealing tube (13, 13′, 13″) comprises a connection end (131, 131′, 131″) and a sealing end (132, 132′, 132″), the connection end (131, 131′, 131″) being detachably connected to the end portion of the external connection tube (12, 12′, 12″) by means of a connection driving mechanism, and the sealing end (132, 132′, 132″) being provided with a pass-through region, wherein, when the pass-through region is exposed outside of the output end (112, 112′, 112″), the self-switching transmission assembly is in a pass-through state, and when the pass-through region is placed inside the tube body of the communicating tube (11, 11′, 11″), the self-switching transmission assembly is in a sealed and blocked state.

Methods for temporarily fixing an orientation of a bone or bones. Methods of correcting a bunion deformity. Bone positioning devices. Methods of using a bone positioning device. Bone preparation guides. Methods of using a bone preparation guide.

The disclosure relates to a spacer using a hydrogel for treatment that aids in growth or bonding of living tissues after surgery or treatment of joints, muscles, or ligaments. The spacer includes a support sheet formed of a biodegradable hydrogel material having a water-soluble polymer network structure, and a pouch formed of a biodegradable material, as a sealing bag-shaped member surrounding the support sheet, and the support sheet is formed to dissolve in a body fluid faster than the pouch. Therefore, the spacer and a method of manufacturing the spacer according to the disclosure may eliminate cost and stress because there is no need for a subsequent removal operation, while stabilizing a surgical site and reducing pain, and particularly, adjust a drug delivery rate adaptively according to different recovery rates or tissue regeneration rates for different ages of patients.

A bone positioning guide may include a main body member, a shaft, and a bone engagement member. The shaft can be movably connected to the main body member and have the bone engagement member rotatably coupled to its distal end. The bone engagement member can have a surface configured to engage a bone. The main body member can also include a tip opposite the bone engagement member for engaging a second bone. In use, the bone engagement member may be positioned in contact with a medial side of a first metatarsal while the tip is positioned in contact with a lateral side of a different metatarsal, such as a second metatarsal. The shaft can then be moved to advance the bone engagement member toward the tip, causing realignment of the first metatarsal.

A method for treating joint pain in a subject is disclosed. The method can include inserting a bone dowel and a first portion of a bone marrow aspirate into a subchondral region of a bone that is part of a joint being treated and introducing a second portion of the bone marrow aspirate into the intraarticular space of the joint being treated.

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 composite joint implant device replaces or repairs damaged meniscus tissue in an animal or human. In one embodiment, a composite joint implant comprises a polymeric body which is reinforced with a pre-formed engineered ligature mechanism. The ligature reinforces the polymeric body around the circumference and is used for attaching the device within an animal or human body. The ligature mechanism internally supports the transmission of vertical loads into tensile stresses. The ligature mechanism can be coated with a compatible material to promote integration with the polymeric body and coated with an encapsulation material.

Methods for temporarily fixing an orientation of a bone or bones. Methods of correcting a bunion deformity. Bone positioning devices. Methods of using a bone positioning device. Bone preparation guides. Methods of using a bone preparation guide.

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.