Which part of the body is the zygomatic bone?

The zygomatic bone is one of the cranial bones located in the mid-facial region, situated laterally and inferiorly to the orbit. It is rhomboid-shaped and features four processes: the orbital process, temporal process, maxillary process, and frontal-sphenoidal process.

The zygomatic bone and zygomatic arch serve as critical bony supports of the face. They protect the prominent lateral facial structures, define the lateral contours of the midface, and separate the superficial skin from the deeper temporalis muscle. As a key osseous framework shaping facial appearance, the zygomatic bone closely influences facial aesthetics. Being relatively robust, it serves as an attachment site for surrounding muscles; thus, facial expressions—including smiling—are significantly influenced by the zygomatic bone.

The zygomatic arch serves three primary functions: (1) protective—shielding the lateral skull wall and adjacent structures; (2) contour-defining—contributing to the facial outline; and (3) compartmentalizing—separating the overlying skin from the temporalis muscle, thereby facilitating normal temporalis muscle function.

In recent years, zygomatic bone fractures have become increasingly common and are now receiving heightened clinical attention. Zygomatic pain may result from various causes, including facial exposure to cold, excessive local muscular tension, or pathological conditions such as bone tumors, bone cysts, bone contusions, or bone fissures. Diagnosis typically requires imaging studies, including localized X-ray, color Doppler ultrasound, CT, and even MRI.