Frontozygomatic suture Last edited and medically reviewed by Alaric Steinmetz on 10.09.2023 Synonyms frontozygomatic suture The frontozygomatic suture is a fibrous suture between the zygomatic bone and the Os frontaleAnatomySynostosis of the frontozygomatic suture occurs in the 8th decade of life and is not completely ossified even by the age of 95[^1].Figure Enlarge Image of the frontozygomatic suture (marked in red) on a 3D skull model.