The shape and size of the skull vary obviously with people, race, sex and age. The size of the skull is often expressed by the numerical values of the anterior diameter, transverse diameter and height diameter of the skull.
The navicular head is a kind of craniofacial stenosis, which is often caused by premature closure of sagittal suture of skull, resulting in craniofacial deformity. After the child is born, it can be found that the skull has a long anterior and posterior diameter, a short transverse diameter, a flat forehead, a disappearing eyebrow arch and a protruding jaw. X-ray examination showed that the skull was thin and had finger indentation.
Most of the children are male, and the ratio of male to female is 4: 1. The children showed mental retardation and increased intracranial pressure. The deformity develops slowly, which is obvious when the child is about 4 years old, and occasionally has a family history.
You can judge the shape of the bow first. The shape of the bow usually shows that the head is long in the front and back direction and looks like a ship, so it is named the bow.
The navicular head itself is a congenital developmental disorder, which is usually caused by premature closure of one or more bone seams, that is, skull bone seams. It can be found in time through X-ray examination to avoid causing abnormal brain development in children, so it is necessary to find and treat it as soon as possible.
Skull stenosis: It is caused by skull hypoplasia, which can be clinically manifested as 4 types 1, pointed head 2, navicular head 3, achondroplasia 4 and short head. The navicular head is caused by premature closure of sagittal suture of skull, resulting in craniofacial deformity. After birth, the skull can be found to be long in front and back diameter and short in transverse diameter, showing a boat shape.
The forehead is flat, the eyebrow arch disappears, the jaw protrudes, the intracranial pressure increases, the intelligence is low, and the deformity develops slowly. It is obvious when you are around 4 years old. X-ray showed that the skull became thinner with finger indentation, mostly male, with occasional family history. Because of the early closure of cranial suture, intracranial pressure can be increased, and 40% of them have mental decline, dullness, indifference and even dementia.