Exceed ABT 15° Face Changing Cup
The unique design modification of the standard hemispherical cementless cup to a 15° face changing cup, allows for insertion of the cup at the appropriate angle of <45° without compromising bone coverage in the patient's acetabular socket in total hip replacement (THR) .
The Exceed ABT 15o Face Changing Cup system allows the surgeon to insert this cup in shallow acetabular sockets, including dysplastic and low dislocation cases in Developmental Dysplasia of the Hip (DDH).
The convex outer surface shell has a closed porous plasma spray cover (and optional hydroxyapatite coating) to achieve osseointegration. The superior lip is not coated as this area is not required for fixation and does not usually make contact with host bone.
The inner concave surface is a morse taper fit for the hard bearing liner, either a ceramic (Biolox delta) or Cobalt Chrome metal alloy. The morse taper fit engages so as to seat the liner at a closed angle of 15° to the mouth of the porous shell but at the same time seats the liner parallel to the mouth created from the rim of the superior lip.
Placement of the acetabular cup during THR is vital because every deviation from the ideal position has a negative impact on hip loads, bearing surface wear and ultimately the implant's survival.
This acetabular implant should be a fundamental tool in complex hip arthroplasty. The design modifications of the Exceed ABT 15° face changing acetabular cup will alter the surgical strategy and treatment of secondary osteoarthritis in patients with shallow acetabular sockets in the future.