Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4060319 | The Journal of Arthroplasty | 2015 | 4 Pages |
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-on-polyethylene 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.