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. 2018 Nov 26;477(1):159–174. doi: 10.1097/CORR.0000000000000535

Fig. 5.

Fig. 5

A montage of images is used to display the full assessment of MoP THAs performed in this study, including preoperative imaging (MAVRIC-SL imaging), intraoperative tissue sampling (hematoxylin and eosin staining), and postoperative wear evaluation. A traditional MoP design (first row, 68-year-old man, femoral stem: VerSys® [Zimmer, Warsaw, IN, USA], femoral head: cobalt-chrome [Zimmer], acetabular component: Harris-Galante [Zimmer], LOI: 20 years) displayed an eccentric femoral head in the polyethylene liner that produced a mild polymeric reaction in the synovium on the MR images. The corresponding histologic assessment displayed sheets of macrophages indicative of polyethylene particles, which corresponded to a large volumetric deviation measured on the polyethylene liner. In contrast to the MoP THA, a modular neck MoP THA design is shown on the second row (54-year-old woman, femoral stem: Rejuvenate [Stryker, Kalamazoo, MI, USA], femoral head: cobalt-chrome [Stryker], acetabular component: Trident [Stryker], LOI: 1.9 years). The MR images displayed a markedly thickened synovial reaction and ALTR (arrows) that correlated to corrosion products at the modular interfaces identified in the corresponding histology as well as the minimal volumetric deviation measured on the polyethylene liner.