Jochbeine

Jochbeine, also known as zygomatic bones, are paired bones that form the prominence of the cheeks and contribute to the lateral and inferior margins of the orbits. Each jochbein articulates with four bones: the maxilla, the temporal bone, the sphenoid bone, and the frontal bone. The prominent arch formed by the zygomatic bone and the temporal bone is called the zygomatic arch, which serves as an attachment point for the masseter muscle, a major muscle of mastication.

The jochbein is a relatively small but significant bone in the facial skeleton. Its shape is somewhat irregular, with a body and three processes: the temporal process, the frontal process, and the maxillary process. The temporal process extends posteriorly to articulate with the zygomatic process of the temporal bone, forming the zygomatic arch. The frontal process projects superiorly and medially to articulate with the frontal bone, forming the lateral part of the orbital rim. The maxillary process extends inferiorly and medially to articulate with the maxilla.

Fractures of the jochbein, often referred to as a "blow-out fracture" or a "tripod fracture" if it involves the three articulations, can occur due to direct trauma to the face. These fractures can lead to cosmetic deformities, pain, and visual disturbances if the orbit is significantly affected. Surgical intervention may be required to restore the normal anatomy and function of the facial skeleton. The jochbein plays a crucial role in facial aesthetics and the structural integrity of the eye socket.