What Is a Coronal Suture?
It is M outer suture and M inner suture, which is located where the left frontal bone of the skull is connected to the left occipital bone and intersects the sagittal suture. Coronal sutures are dense fibrous connective tissues in infants and young children. Later, canine teeth interstitial gap connections gradually form.
- Chinese name
- Coronal suture
- Foreign name
- The coronal suture
- Features
- Lines connecting the temples on the vertical plane
- Location
- Hairline later
- It is M outer suture and M inner suture, which is located where the left frontal bone of the skull is connected to the left occipital bone and intersects the sagittal suture. Coronal sutures are dense fibrous connective tissues in infants and young children. Later, canine teeth interstitial gap connections gradually form.
Coronal seam concept
- Beginning at about 22 years old, the joint fracture gradually disappears, and the parietal bone and frontal bone are gradually ossified. At about 47 years old, the entire bone fracture is completely fused. This process is called suturaunion. Generally, the healing of coronary sutures starts from the inner plate and then continues to the outer plate. Therefore, the healing time of the intracranial suture is earlier than that of the extracranial suture, and the healing time of the male suture is earlier than that of the female.
Coronary sutures Coronal sutures and surgical closure of zygomatic sutures
Premature closure of unilateral coronal suture
- A bilateral sigmoid shape may appear, reflecting two different mechanisms: one is that bone growth is blocked on the side of the premature closure of the coronary suture, which restricts the anterior cranial fossa from expanding forward, causing the forehead to be depressed and flat. The growth vector on the ipsilateral frontal lobe can only develop in three directions: upward, inferior and contralateral. The pressure on the front extends the forehead. The pressure on the bottom changes the middle cranial fossa. The outer wall of the orbit becomes shorter, so that the middle cranial fossa expands directly to the orbit, reducing the volume of the orbit and causing the eyeballs to bulge. The anterior cranial fossa is raised to form a so-called "harlequin-like orbit". The opposite side of premature closure of the coronary suture due to changes in the growth vector, various secondary deformities appear, reflecting the different closure time of the cranial suture in the embryonic stage. The forehead usually bulges forward and the orbit is shifted downward and laterally. This orbital asymmetry may be due to the pressure of the frontal lobe preventing the normal orbital embryo from migrating from the outside to the inside. Finally, the face is often asymmetric.
Coronary suture
- From the shape of the skull and CT examination, it can be seen that most children have asymmetric deformities of varying degrees. The corrective method is to do double staggered osteotomy, and rotate and shape the two frontal bone flaps to make them beautiful in appearance. According to the method described above, move the upper orbit of both sides of the orbit, perform a green branch fracture on the zygomatic bone at the forehead, and then fix the forward orbit with a bone graft formed into a convex-concave joint. The degree of advancement depends on the asymmetry of the orbit.