What is a fibrous joint?
The fibrous joint indicates articulation between two or more bones in the human body. Unlike synovial or movable joints, such as a shoulder or knee, fibrous joints allow small or no movement between bones. The fibrous joint, which consists of hard connective tissue, such as the type of ligaments and tendons, contains mostly collagen connecting bones together. Examples of fibrous joints, of which there are three types, include intersections between the skull or skull bones, those between the parallel long bones in the lower leg and those between the teeth and the jaws. These are long, jagged joints that resemble cracks in the sidewalk connecting the curved bones of the skull: front, parietal, time and occipital bones. At birth there are small gaps between bones on the paths that allow very slight expansion and contraction skull is shape.
As the skull evolves, in the first months of life, these gaps are approaching and joints become syarrodial, which means they do not allow any other elasticity. Specific fibersAnd the bones of the skull are known as Sharpey's fibers. They are not linear, but rather are cross -made to allow very slight flexibility in several ways.
Another type of fibrous joint is syndesmosis, a type of joint found between the tibia and the fibula in the shin and also between the radius in the forearm and the carpal bones in the wrist. Tibia and fibula are the long bones that lie side by side. Syndesmosis is found where the distal or lower ends of the tibia and fibules meet above the ankle and are referred to as lower tibiophibular articulation. On the wrist is syndesmosis of the radiocartic joint, where the long radius in the arm encounters grouped, irregularly shaped carpal bones on the base of the hand. Both joints allow only less movement and are connected by a strong ligament between the bones called interosseous ligament.
The third type of fibrous joint is GOMPHOSIS, another type of joint that is found onlyin one place in the body. Gomphose are joints that attach their teeth their roots to the maxillary bone in the upper row or jaw in the lower row. The teeth are held on site against their respective jaws in drawers called alveoli by periodontal ligaments. These bonds are very small and do not allow any real movement - only a gradual displacement that produces wearing braces or holder.