Table of Contents
Which complication can result from a zygoma fracture?
Malunion is the most common complication of zygomatic fractures and is the result of improper reduction and fixation, resulting in malocclusion, facial asymmetry, and enophthalmos. Extraocular muscle entrapment, although usually attributable to the initial fractures, also can occur secondary to fracture repair.
What articulates with the zygomatic bone?
Definition. The zygomatic bone articulates with the sphenoid bone, maxilla, frontal bone, and temporal bone to form the lateral wall of the floor of the orbit, part of the temporal and infratemporal fossa, and the prominence of the cheek.
What happens when you fracture your zygomatic bone?
Fractures of the ZMC or zygomatic arch can often lead to unsightly malar depression, which should be corrected to restore a normal facial contour. ZMC fractures can also cause significant functional issues, including trismus, enophthalmos and/or diplopia, and paresthesias of the infraorbital nerve.
Where is the malar eminence?
The malar eminences are designated as the point of intersection between a vertical arc from the zygomatic process of the frontal bone to the maxilla superior to the first molar, and a horizontal arc from the inferior orbital rim along the superior aspect of the zygomatic arch.
How is a zygomatic fracture treated?
Surgical intervention is an effective treatment modality of depressed zygomatic complex fractures, whereas a nonsurgical approach is often used for nondisplaced fractures. Most zygomatic complex fractures can be treated solely by an intraoral approach and rigid fixation at the zygomaticomaxillary buttress.
What bones articulates with the inferior border of the zygomatic bone?
The zygomatic bone articulates with the frontal bone, sphenoid bone, and paired temporal bones, and maxillary bones.
What is Zygomas?
The zygomatic bone (or zygoma) is a paired, irregular bone that defines the anterior and lateral portions of the face. The zygomatic complex is involved in the protection of the contents of the orbit and the contour of the face and cheeks.[1]
What is malar fracture?
(trī’pod frak’shŭr) A facial fracture involving the three supports of the malar prominence: the arch of the zygomatic bone, the zygomatic process of the frontal bone, and the zygomatic process of the maxillary bone.
What is the zygomatic eminence?
The zygomatic process of the maxilla (malar process) is a rough triangular eminence, situated at the angle of separation of the anterior, zygomatic, and orbital surfaces. In front it forms part of the anterior surface. Behind it is concave, and forms part of the infratemporal fossa.
How long does it take for a zygomatic bone to heal?
Cheekbone fractures rarely get infected, so you will not usually need antibiotics. Swelling and bruising can be reduced by using cold packs and sleeping propped up for the first few days. Even if you have plates and screws to hold your cheekbone in place, it still takes about six weeks for the bone to heal completely.
What attaches to the zygomatic arch?
The much larger masseter muscle which is used for moving the jaw, attaches directly to the zygomatic arch, and the other side to the large part of the mandible. This muscle provides most of the motion of the jaw, while the temporalis muscle provides extra tension on the jaw to grind, chew, strip and mash food.
What is a Zygomaticofacial foramen?
The zygomaticofacial foramen is a small foramen in the mid lateral surface of the zygomatic bone that transmits the zygomaticofacial nerve (a branch of the zygomatic nerve from the maxillary division of the trigeminal nerve) and zygomaticofacial vessels.
What is the most commonly fractured facial bone?
Nasal bones (broken nose): Nasal bone fractures are the most common type of facial fracture. The nasal bone is made up of two thin bones. It takes less force to break the nasal bones than other facial bones because they are thin and prominent.
What is a zygomatic arch fracture?
The zygoma is a bone that provides vital contributions to both the structure and aesthetic of the midface and articulates with several bones of the craniofacial skeleton. The zygoma and its articulations comprise the zygomaticomaxillary complex (ZMC). Fractures of the zygomatic arch (ZA) or any of i … Zygomatic Arch Fracture Book
What structures create the temporomandibular joint at the inferior origin of zygomatic?
Two structures that create the temporomandibular joint at the inferior part of the origin of the zygomatic process are the articular tubercle along with the mandibular fossa. Both are extend from medial to lateral.
What is the articular tubercle?
Articular tubercle. The articular tubercle ( eminentia articularis) is a bony eminence on the temporal bone in the skull. It is a rounded eminence of the anterior root of the posterior end of the outer surface of the squama temporalis. This tubercle forms the front boundary of the mandibular fossa, and in the fresh state is covered with cartilage.
What are the sutures of the zygoma?
Zygomaticotemporal (ZT) suture – The temporal process of the zygoma articulates with the zygomatic process of the temporal bone to form the anterolaterally projected zygomatic arch (ZA) Zygomaticomaxillary (ZM) suture and the infraorbital rim (IOR) Zygomaticofrontal (ZF) suture