The zygomatic or malar bones form the cheek and the lower, outside rim of the orbits. The temporal process of the zygomatic bone curves around the side of the skull to meet the zygomatic process of the temporal bone, forming the zygomatic arch. The upper, frontal part of the zygomatic bone, forming the outer rim of the orbit and meeting the frontal bone, is called the frontal process, while the orbital surface defines the smooth, lower and outer wall of the orbital cavity. Each zygomatic bone features a zygomaticofacial foramen, or opening, into the bone near the lower corner of the orbit. Research Zygomatic Bones