Two-in-one cup bearing system
Ceramic and PE liner
The two taps prevent PE liner dislocation
Surface Treatment – Plasma Sprayed Ti Coating
2.Acetabular Exposure and Reaming
The acetabular rim must be exposed, and the remains of the capsule must be cleaned. Initiate the reaming with a small, starting reamer to deepen the acetabulum all the way to the medial floor of the acetabular fossa, while at the same time, retaining the subchondral bone in the superior region of the acetabular dome. The whole cartilage should be removed, along with the osteophyte on the acetabular fossa, and the osteophyte on the rim. It is advisable to use reamers in 1-2 mm increments when approaching the definitive acetabular size. During the reaming procedure, hold the reamer in the same direction in which the acetabular cup will be implanted. Clean the acetabulum of all remaining cartilage and soft tissues, down to the bleeding subchondral bone.
3.Positioning of the Acetabular Cup Trialing
The quality of press fit can determine whether the real cup is appropriate, using the trial acetabular cup. It is important to understand that all Bencox Cup system is marked with true dimensions. (54mm trial cup is same as real cup 54mm in diameter)
Insert the 1-2mm bigger size of trial cup than last reamer into the reamed acetabulum. In case of severe osteoporotic bone, may need to insert the 3-4mm bigger size of trial cup than last reamer. Check the stability of the final trial cup. It may be necessary to increase the diameter if the trial cup is unstable.