Joint bioscaffolds

A bioscaffold for replacement and regeneration of a temporomandibular joint (TMJ) meniscus, the bioscaffold comprising:

• a biocompatible, biodegradable, elastomeric implant dimensioned to fit within the TMJ and mimic the size and function of a native TMJ meniscus, the implant comprising a raised central core having a curved top surface, and the core is surrounded by a substantially flat peripheral brim extending around the core, wherein the core comprises a gel or particulate powder extracellular matrix and has a circular or elliptical base and a height above the base and composition that permits the core to elastically deform under stress, and a diameter of the core is sufficient for the core to carry shear forces between the mandible and the skull when the implant is affixed to an articulating condylar head of a mandible or a zygomatic bone in the TMJ as a replacement for a TMJ meniscus following TMJ meniscectomy.