Cylindrical Joint (Trochoid Joint, Pivot Joint)

Cylindrical joint (Trochoid Joint, Pivot Joint) is one of the types of diarthrosis (freely moving joint). In this type of joint, the bones rotate around a central axis.

A characteristic feature of a cylindrical joint is the presence of a cylindrical surface on one of the articulating bones that fits into an annular ligament or fossa on the other bone. This allows movement in only one plane - rotation around the longitudinal axis.

A classic example of a cylindrical joint in the human body is the median atlantoaxial joint, formed by the fossa of the arch of the atlas (the first cervical vertebra) and the odontoid process of the axis of the second cervical vertebra. It allows you to turn your head right and left. Another example is the wrist joint.

Thus, the cylindrical joint plays an important role in ensuring mobility of various parts of the body due to rotational movements around an axis.

A cylindrical joint (trochoid joint, pivot joint) is a type of diarthrosis (freely moving joints), in which the bones perform rotational movements around the central axis of the joint. This joint converts rotational motion into linear motion or vice versa.

An example of a cylindrical joint is the mid-atlanto-axial joint (also known as the mid-Atlas-Axial joint or the mid-Atlanto-Axial joint), which is located between the fossa on the arch of Atlas and the axis of the first cervical vertebra (C1).

At this joint, the rotational movement of the Atlas around its central axis is converted into a linear movement of the head relative to the neck. This allows the head to move freely and ensures stability of the head in an upright position.

The cylindrical joint has a number of advantages compared to other types of joints. It has a high degree of mobility and allows rotational movements with high precision and stability. In addition, it is resistant to stress and shock, making it ideal for use in various applications such as motion control mechanisms, robots, etc.

However, like any other joint, the cylindrical joint has its limitations and disadvantages. It may be subject to wear and damage under heavy loads or misuse. In addition, its design can be complex and require high precision manufacturing and assembly.

However, due to their advantages, cylindrical joints are widely used in various industries, including automotive, aviation, aerospace and other fields. They are used as hinges, connectors and other elements where a high degree of freedom and precision of movement is required.

Thus, the cylindrical joint is an important element for many applications and continues to be developed and improved to meet the needs of modern technology and industry.

A cylindrical joint (trochoid joint, pivot joint) is one of the types of diarthrosis - freely moving joints. In such a joint, rotational movements of the bones are possible around a certain central axis passing through them. It has been proven that cylindrical joints are used quite often in the middle spine - every second joint is called cylindrical to one degree or another. One example of such joints is the mid-atlas, which is formed after the meeting of the fossa of the arch of the first and the foramen of the body of the 2nd vertebrae.