3 years ago

Fourteen Year Follow-up of Randomized Clinical Trials of Active Robotic-Assisted Total Hip Arthroplasty

Active robotic total hip replacement has been used clinically for over 20 years, but long-term results have never been studied. The aims of this study are to determine whether active robotic total hip replacement improves clinical outcomes and results in fewer revisions over a long-term follow-up. Methods Patients from two US FDA clinical trials (1994-1998, 2001-2006) who had undergone total hip replacement using either an active robotic system or a traditional manual technique were examined to determine if any differences existed in radiographic analysis and patient pain and function using the UCLA, VAS, HSQ pain, HSQ Role Physical, HSQ Physical Functioning, Harris Pain scores, and the Total WOMAC scores at mean follow-up of 14 years. Results The ROBODOC group had statistically significantly higher HSQ Pain and Harris Pain scores and lower WOMAC scores. There was no statistically significant difference in probability of a revision for wear between the groups (χ2= 1.80. p = 0.179) and no revisions for loosening in either group. Conclusions Prior studies have demonstrated improved implant fit and alignment with the use of this active robot system. This long-term study now shows no failures for stem loosening at mean follow-up of 14 years and small but potentially important improvements in clinical outcomes in the robot group.

Publisher URL: www.sciencedirect.com/science

DOI: S0883540317308744

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