No abstract

Keywords:taper corrosion taper design trunnionosis metal-on-polyethylene total hip arthroplasty This study examines how taper design affects corrosion and fretting at the head trunnion surface. All hip prostheses retrieved between 1999 and 2013 with 28 mm/+0 heads were selected, resulting in 44 cobalt-chrome-onpolyethylene implants, representing six taper designs. Mean implantation time: 8.9 ± 3.7 years. The femoral head tapers were scored for fretting and corrosion using the Goldberg scale as both a combined score and by three zones (apex, central and base). There was no difference in age (P = 0.34), BMI (P = 0.29), or implantation time (P = 0.19) between taper groups. The 11/13 taper had the highest combined corrosion and fretting score, but no difference (P = 0.22) between groups for combined scores (P = 0.22 for corrosion, P = 0.19 for fretting). In a zone-specific analysis, the 11/13 taper had highest corrosion score at base zone (P = 0.02). Taper design had a significant effect on corrosion at base of trunnion.Crown

Laparoscopic collection of serial full-thickness small intestinal biopsy specimens with a 45-mm ELS may be an effective and safe technique for use in healthy adult experimental horses.

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III.

This micro-CT technique combines the benefits of volumetric and surface scanning methods to quantify wear across all surfaces of polyethylene components with a single tool. When applied in wear simulator and retrieval studies, these measurements can be used to evaluate and predict the wear properties of the components.

Level III.

No abstract