Radiostereometric Analysis Study of Tantalum Compared with Titanium Acetabular Cups and Highly Cross-Linked Compared with Conventional Liners in Young Patients Undergoing Total Hip Replacement

Trabecular Metal Acetabular Components Reduce the Risk of Revision Following Primary Total Hip Arthroplasty: A Propensity Score Matched Study From the National Joint Registry for England and Wales

“…Studies have observed superior mechanical stability of TM acetabular components compared with non-TM components, [24] with good fixation of TM implants confirmed on radiostereometric analysis at medium-term follow-up after primary THA [11][12][13]. However given that aseptic component loosening predominantly occurs at long-term follow-up it is important to continue to monitor the performance of TM implants into the second decade after surgery.…”

“…Trabecular metal TM (TM; Zimmer-Biomet; Warsaw, Indiana, USA) is a material made from elemental tantalum, which is highly porous with a high coefficient of friction and a modulus of elasticity similar to cancellous bone, with studies observing that TM has a higher potential for osteointegration, which may reduce subsequent implant failures [7][8][9]. These attractive properties have led to increased usage of TM coated acetabular components in both primary and revision THA [4,8,10,11]. In primary THA, TM implants have demonstrated good fixation at medium-term follow-up on radiostereometric analysis, [11][12][13] with one small cohort suggesting good clinical outcomes can be achieved at 15-years follow-up [14].…”

“…These attractive properties have led to increased usage of TM coated acetabular components in both primary and revision THA [4,8,10,11]. In primary THA, TM implants have demonstrated good fixation at medium-term follow-up on radiostereometric analysis, [11][12][13] with one small cohort suggesting good clinical outcomes can be achieved at 15-years follow-up [14].…”

“…However studies assessing TM acetabular components to date have been limited by being small single-centre cohorts, with many lacking a comparator group [8,[10][11][12][13][14][15][16]. Given the risk of failure is generally low, especially after primary THA, it is important to assess the clinical efficacy of TM acetabular components in large cohorts that are appropriately powered to detect differences in revision rates between TM and non-TM implants.…”

Femoral Head Penetration Rates of Second-Generation Sequentially Annealed Highly Cross-Linked Polyethylene at Minimum Five Years

“…Lee et al compared CoCr heads of 26mm and 32mm and reported higher four-year mean linear head penetration rates (not significant) for the 32mm heads (0.20 mm/year v. 0.15 mm/year) [43]. CoCr heads of 28mm have been reported with mid-term head penetration ratesM A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT11 as low as a mean of 0.05 mm/year and median of 0.04 mm/year [44,45]. However, the majority of studies report conventional polyethylene head penetrations above the historical osteolysis threshold of 0.10 mm/year leading to late failure [42,43,48].…”