Replaceable fossa component for a temporomandibular joint replacement system

A patient-specific temporomandibular joint replacement comprising:

• a condylar component comprising a condylar head and a body portion, the body portion having a mandibular-bone-contacting surface anatomically-contoured for attachment with a mandibular bone;
• and
• a fossa component comprising:
• a fossa backing having zygomatic-bone-contacting surfaces anatomically-contoured for attachment with a zygomatic bone;
• and
• a fossa lining slidably attached with the fossa backing, the fossa lining including an open-ended concave articulating surface which interfaces and articulates with the condylar head of the condylar component,
• wherein the fossa backing and fossa lining are slidably attached via slots on the fossa backing which fit corresponding tabs on the fossa lining,
• wherein the articulating surface of the fossa lining curves to a high point posterior of a center of a sagittal plane and apexes at a center of the fossa lining in a coronal plane,
• wherein the condylar head of the condylar component has an overall spherical or rounded shape along a sagittal plane and an overall oblong shape along a coronal plane, and
• wherein the oblong shape of the condylar head is oriented laterally within the articulating surface of the fossa lining.