Which fibrous joint is characterized by the connection of teeth to the jawbone?

• A. Suture
• B. Gomphoses
• C. Syndesmoses
• D. Synchrondroses

Answer: (B)

The fibrous joint that connects teeth to the jawbone is known as a gomphosis. This type of joint is specifically found in the connection between the roots of teeth and the sockets in the jaws (maxilla and mandible). Gomphoses are unique because they involve a peg-in-socket arrangement, allowing for a stable fixation that accommodates the functional demands placed on the teeth during chewing and biting.

In gomphoses, periodontal ligaments are key components that secure the tooth firmly in place while also providing slight mobility, which is essential for facilitating normal chewing motions. This arrangement adds both stability and a limited range of motion necessary for dental function.

In contrast, other types of fibrous joints, such as sutures and syndesmoses, connect bones but do not involve teeth. Sutures are found between skull bones and are immovable, while syndesmoses connect bones with a greater distance apart, allowing for more movement than sutures but less than synovial joints. Synchondroses, on the other hand, involve hyaline cartilage and are found in areas such as the epiphyseal plates in growing bones, but they are not related to tooth attachment. Thus, gomphoses is the correct classification for the joint