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The Trinity Acetabular System is intended for use in total hip arthroplasty in skeletally mature patients, to provide increased mobility and reduce pain by replacing the damaged hip joint articulation where there is evidence of sufficient sound bone to seat and support the components. The indications for the Trinity Acetabular System as a total hip arthroplasty include: - Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis - Rheumatoid arthritis - Correction of functional deformity - Developmental dysplasia of the hip (DDH) or congenital dysplasia of the hip (CDH) The Trinity Acetabular System is indicated for cementless, single use only.

The Trinity Acetabular System is a modular acetabular cup system consisting of a press fit, titanium alloy shell with, ultra high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (HXLPE) and vitamin E highly cross-linked polyethylene (ECiMa) acetabular liners in neutral offset, +4mm offset, +4mm oblique, neutral 4mm EPW. The Trinity system also includes, BIOLOX delta™ ceramic and CoCr modular heads which are intended for use with Corin titanium femoral stems. The acetabular shell comes in two variants, a standard Trinity (K093472 and K110087) and a Trinity-i (K122305) shell, both coated with a rough titanium plasma spray with an additional top layer of electrochemically deposited calcium phosphate (BONIT™). The Trinity and Trinity-i acetabular shells are provided with screw holes and come assembled with titanium occluders in place. Dedicated titanium screws are also provided for additional fixation if required. The purpose of this submission is to add two more acetabular shell variants to the Trinity Acetabular System, the standard Trinity No Hole acetabular shell and the Trinityi No Hole acetabular shell. Both of these variants, subject of this submission, are similar to the standard Trinity Acetabular shells previously cleared (K093472, K110087 and K122305) with the only difference being the shells subject of this submission do not have screw holes in them.