Joints are locations where bones make contact with each other. Because their function is movement and support, the joints have been modified accordingly to serve the required function.
The joints are broadly classified into three categories. Each category has further subcategories
These are also called synarthroses or immovable articulations. In these joints, the bone surfaces are in almost direct contact. The bones are fastened together by intervening connective tissue. Often in such joints, there is no appreciable motion.
Sutura, gomphosis, and syndesmosis are further subtypes of these joints
Sutura is the joint contiguous margins of the bones are united by a thin layer of fibrous tissue. This kind of joint is found in the skull only.
When the margins of the bones are connected by a series of processes, and indentations interlocked together, the articulation is termed a true suture or sutura vera.When the articulation is formed by roughened surfaces placed in apposition with one another, it is termed a false suture or sutura notha.
Sutura vera is of three types sutura dentata, serrata, and limbosa.
It has got its name from is so called from the tooth-like form of the projecting processes. Example is as in the suture between the parietal bones.
The edges of the bones are serrated like the teeth of a fine saw, as between the two portions of the frontal bone.
Besides the interlocking, a certain degree of beveling of the articular surfaces, so that the bones overlap one another.This is found between parietal and frontal bones. [Read more...]
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