Primary rotatory stability of hip endoprostheses stems after manual and robot assisted implantation

Zeitschrift für Orthopädie und ihre Grenzgebiete
M PrymkaJ Hassenpflug

Abstract

In our study we compared the primary rotatory stability of hip endoprostheses which were implanted with the help of a robot with that of manually implanted stems. We examined three different types of prosthesis-stems: Osteolock (Stryker-Howmedica), CBC (Mathys), Excia (Aesculap). Furthermore, we examined two types of prostheses which could not be implanted with a robot (Sl-Plus/Endoplus; Hipstar/Stryker-Howmedica). 10 stems of each prosthesis type were implanted in identical polyurethane foam blocks; 5 of them were implantated manually, 5 with the help of a robot (CASPAR, URS-Ortho). After implantation, a defined rotatory stress was put on the stem with the help of a torquing machine. The torsional moment which was necessary until the stem broke out of the foam was documented with the help of special software. In all types of prostheses the use of the robot system led to a higher rotatory stability compared to the manual group. Among the three tested types of prosthesis stems, the CBC stem is significantly more stable for rotatory forces after robot-assisted implantation compared to the other two types. After manual implantation there was no difference in stability between the different stems. The Zweymüller stem and the Hipsta...Continue Reading

Citations

Jun 16, 2009·Archives of Orthopaedic and Trauma Surgery·Philipp BergschmidtWolfram Mittelmeier
Oct 12, 2013·International Orthopaedics·Richard LassRainer Kotz
Apr 17, 2008·Journal of Biomechanical Engineering·Youngbae ParkYong-San Yoon
Dec 24, 2008·Journal of Biomechanical Engineering·Youngbae ParkYong-San Yoon
Dec 24, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Itay PeretsBenjamin G Domb
Oct 28, 2016·International Orthopaedics·Saverio AffatatoDomenico Tigani
Jun 15, 2010·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Philipp BergschmidtWolfram Mittelmeier
Jan 12, 2021·EFORT Open Reviews·Jean-Pierre St MartZameer Shah

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