The proximal tibiofibular articulation is an arthrodial joint

Joint

A joint is the location at which two or more bones make contact. They are constructed to allow movement and provide mechanical support, and are classified structurally and functionally.-Classification:...

 between the lateral condyle

Lateral condyle

Lateral condyle can refer to:* Lateral condyle of tibia* Lateral condyle of femur* Lateral condyle on metatarsal...

 of the tibia

Tibia

The tibia , shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates , and connects the knee with the ankle bones....

 and the head of the fibula.

The contiguous surfaces of the bones present flat, oval facets covered with cartilage

Cartilage

Cartilage is a flexible connective tissue found in many areas in the bodies of humans and other animals, including the joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes and the intervertebral discs...

 and connected together by an articular capsule and by anterior and posterior ligaments.

When the term "tibiofibular articulation" is used without a modifier, it refers to the proximal, and not the distal tibiofibular articulation.