Human Hip Joint Model

Quick Answer: The Human Hip Joint Model is a hip joint model showing the head of the femur seated in the acetabulum of the pelvis, used to teach how this ball-and-socket joint moves, what holds it together and why it is so often injured or replaced.

A Deep Ball-and-Socket Joint

The hip joint links the pelvis to the lower limb. The femoral head forms about two-thirds of a sphere and fits deeply into the acetabulum, whose rim is deepened further by a ring of fibrocartilage, the acetabular labrum. This close fit makes the hip far more stable than the shoulder, at the price of a smaller range of movement, and it allows flexion, extension, abduction, adduction, medial and lateral rotation and circumduction.

Three strong ligaments reinforce the capsule. The iliofemoral ligament at the front, shaped like an inverted Y, is one of the strongest in the body and stops the hip over-extending when a person stands; the pubofemoral and ischiofemoral ligaments add support below and behind. Inside the joint, a small ligament of the head of the femur carries a minor artery to the head, which matters more in children than in adults.

The listing does not state whether this model shows ligaments or moves, or whether it is life size, so confirm the form. A separate femur bone model shows the whole thigh bone, and the pelvis model with five lumbar vertebrae places the hip within the wider pelvic ring.

Handling the Hip Model

• Carry the hip joint model by the pelvic portion or its base, not by the femur, which acts as a lever on the joint.
• If the joint moves, return it to a neutral position after each lesson rather than leaving it fully rotated.
• Clean around the acetabular rim with a soft brush and a dry wipe; moisture trapped in the socket can mark the surface.

Applications

• Anatomy teaching of ball-and-socket joints and hip movements
• Orthopaedic and nursing lessons on hip fracture, arthritis and hip replacement
• Physiotherapy explanations of hip precautions after surgery
• Discussing developmental dysplasia of the hip in child health courses

Specifications

Why Choose LabEquip

Orthopaedic wards, physiotherapy schools and anatomy teachers use a hip model to explain one of the joints most often replaced in surgery. LabEquip lists this model in its biology lab products; ask about its form through the contact page.

Frequently Asked Questions

Why is the hip more stable than the shoulder?

The acetabulum is deep and wraps around much of the femoral head, and strong ligaments and muscles surround it. The shoulder socket is shallow, trading stability for a larger range of movement.

What is the acetabular labrum?

A ring of fibrocartilage attached to the rim of the acetabulum that deepens the socket and helps seal the joint. Tears of the labrum can cause groin pain and clicking.

Which ligament is the strongest in the hip?

The iliofemoral ligament at the front of the joint. It tightens when the hip extends, allowing a person to stand upright with little muscle effort.

What happens in a hip replacement?

The worn joint surfaces are replaced with artificial parts: a cup set into the acetabulum and a stem in the femur carrying a new ball. It is most often done for arthritis or for some hip fractures.

What is developmental dysplasia of the hip?

It is a condition in which a baby’s hip socket is shallow or the joint is unstable, so the femoral head can slip out. Babies are screened for it because early treatment is simpler.

Which movements does the hip allow?

Flexion and extension, abduction and adduction, medial and lateral rotation, and circumduction, which combines them in a circle. Walking, sitting and climbing stairs all depend on these movements.

Last Updated: September 2026