Structural Classifications of Joints

What are the three classifications of joints based on tissues that connect the bones?

• Fibrous

• Cartilaginous

• Synovial

Fibrous Joint: Bones joined by _________________ (dense irregular)

fibrous connective tissue

Fibrous Joint: Amount and length of connective tissue differs between joints and affects….

range of motion

Fibrous Joint Classifications (3)

• Suture

• Gomphosis

• Syndesmosis

Fibrous Joint: Suture

Joint specific to the skull where bones are close together and joined by sutural ligaments

Fibrous Joint: Gomphosis

Peg and socket joint where tooth and bone are joined by periodontal ligaments (PDL) and allow for some movement

Fibrous Joint: Syndesmosis

Articulating bones are further apart and joined by longer sheet of connective tissue, such as the interosseous membrane, which allows for more movement

Cartilaginous Joint: Bones joined by ______

cartilage

Cartilaginous Joint Classifications (2)

• Synchondrosis (primary)

• Symphysis (secondary)

Cartilaginous Joint: Synchondrosis

Bones are joined by hyaline cartilage, such as epiphyseal plates (temporary)

Cartilaginous Joint: Symphysis

Midline joint where bones are connected by fibrocartilage such as the pubic symphysis or intervertebral discs

Synostosis

An ossified joint that is immobile, such as ossified sutures and epiphyseal lines

When an epiphyseal plate ossifies, what type of ossification is occuring?

endochondral ossification

Synovial Joint

Bones joined by a fibrous capsule (dense irregular connective tissue) enclosing a cavity around the joint

The first rib and sternum are joined by hyaline cartilage. Which type of joint is this?

Synchondrosis