Zygomatic bone (cheekbone)

Structure and parts

The zygomatic bone is roughly quadrilateral and has several named parts and surfaces. Key features include the frontal process that meets the frontal bone, the temporal process that joins the temporal bone to help form the zygomatic arch, and the maxillary process that articulates with the maxilla. The orbital surface completes part of the orbit floor and lateral wall (orbital anatomy).

• Foramina: small openings (zygomaticofacial and zygomaticotemporal) transmit sensory nerve branches to the cheek and temple region.
• Muscle attachments: facial expression muscles such as the zygomaticus major and minor attach here; the zygomatic arch serves as part of the masseter's attachment.
• Articulations: connects with the frontal bone, maxilla, temporal bone, and sphenoid.

Development and naming

The zygomatic bone develops by intramembranous ossification during fetal life and grows with the rest of the facial skeleton. The term "zygomatic" derives from the Greek zygoma, meaning "yoke" or "bar," reflecting its role in bridging facial bones. It is one of the major facial bones alongside others in the midface (facial bones overview).

Clinical significance and uses

Clinically, the zygomatic bone is involved in common facial injuries such as zygomaticomaxillary complex (tripod) fractures and zygomatic arch fractures, which can affect eye position, facial contour, and jaw movement. Surgeons address these injuries with fixation or reconstruction because the bone contributes to orbital support and facial symmetry. It is also a landmark in cosmetic and reconstructive procedures and in some implant techniques.

Notable facts and distinctions

Individual variation in zygomatic size and projection contributes to ethnic and sexual differences in facial shape. The prominence of the cheek is often described with the term "malar" (from Latin), and the bone's relationships to surrounding structures make it a frequent subject in anthropological, forensic, and surgical contexts (cheek anatomy).

Because it forms part of the orbit and the facial skeleton, the zygomatic bone serves both protective and functional roles: protecting orbital contents, serving as attachment for muscles of expression and mastication, and helping define the human facial profile.