Pinnacle Constrained Acetabular Liner - Constrained polyethylene acetabular liner

Intended purpose

The Pinnacle Constrained Acetabular Liner is indicated for use as a component of a total hip prosthesis in primary or revision patients at high risk of hip dislocation due to a history of prior dislocation, bone loss, joint or soft tissue laxity, neuromuscular disease or intraoperative instability.

Functional description

The Pinnacle Constrained Acetabular Liner is manufactured from cross-linked UHMWPE, which locks into an outer shell component. The liner component articulates with a metal femoral head of an appropriate diameter. The Pinnacle Constrained Acetabular Liner mechanically constrains the femoral head within the inner diameter of the liner with a titanium constraining ring which fits over the opening diameter of the liner. The UHMWPE liner is held in the metal shell by means of a titanium locking ring.