A Comparison of a Second- and a Third-Generation Modular Cup Design

Does the Ingrowth Surface Make a Difference? A Retrieval Study of 423 Cementless Acetabular Components

“…ACCEPTED MANUSCRIPT 11 reflect the adequacy of fixation in situ, as bone or tissue attachment may have been more easily displaced at removal compared to the porous coated shells. The Trident shell was initially a PSL design (peripheral self-locking), with an elliptical shape that was implanted after line-to-line reaming the socket.…”

“…This may be due to improvements in the liner in terms of the polyethylene and sterilisation methods, or the different shell-liner locking mechanisms. The taper lock design of the Pinnacle cup has less radial clearance and therefore reduced shell-liner micromotion [11]. The Australian Hip Registry shows acceptable revision rates for the Pinnacle shell in combination with other total hips for up to 10 years follow up [19].…”

“…Features of the shell that may influence osseointegration include bead size, pore size, coating type and/or surface treatment, alloy type and various design features A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 4 to minimise micromotion such as screws, pegs or fins (1,4,7,8). The type of bearing couple, the liner locking design and the processing and sterilisation of the polyethylene liner may also affect failure of fixation due to wear-particle induced osteolysis [8][9][10][11]. Clinical factors such as patient activity, bone quality, implant positioning and initial implant stability are also significant.…”

Polyethylene Liner Dissociation Is a Complication of the DePuy Pinnacle Cup: A Report of 23 Cases

“…In the early 2000 s, a series of changes to accommodate a choice of bearing modularity were made to the inner geometry of the new DePuy Pinnacle design [13]. The locking ring and rotation tabs were replaced with a taper-lock mechanism that could accept polyethylene, metal, or ceramic.…”

Backside Wear Is Not Dependent on the Acetabular Socket Design in Crosslinked Polyethylene Liners

“…The Reflection and Duraloc sockets have been among the commonly implanted acetabular implants over the last two decades [9,10,18,19,34,40,41]. As such, surgeons performing revision THA will continue to deal with these sockets, especially in scenarios with the possibility of isolated liner revision where a well-fixed socket might be retained.…”