Model-based roentgen stereophotogrammetric analysis to monitor the head-taper junction in total hip arthroplasty in vivo-and they do move

Xu J, Sonntag R, Kretzer JP, Taylor D, Forst R, Seehaus F (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Materials MDPI

Book Volume: 13

Article Number: 1543

Journal Issue: 7

DOI: 10.3390/ma13071543

Abstract

Model-based Roentgen stereophotogrammetric analysis (RSA) using elementary geometrical shape (EGS) models allows migration measurement of implants without the necessity of additional attached implant markers. The aims of this study were: (i) to assess the possibility of measuring potential head-taper movement in THA in vivo using model-based RSA and (ii) to prove the validity of measured head-taper migration data in vitro and in vivo. From a previous RSA study with a 10 years follow-up, retrospectively for n = 45 patients head-taper migration was calculated as the relative migration between femoral ball head and taper of the femoral stem using model-based RSA. A head-taper migration of 0.026 mm/year can be detected with available RSA technology. In vitro validation showed a total migration of 268 ± 11 μm along the taper axis in a similar range to what has been reported using the RSA method. In vivo, a proof for interchangeable applicability of model-based RSA (EGS) and standard marker-based RSA methods was indicated by a significant deviation within the migration result after 12-month follow-up for all translation measurements, which was significantly correlated to the measured head-taper migration (r from 0.40 to 0.67; p < 0.05). The results identified that model-based RSA (EGS) could be used to detect head-taper migration in vivo and the measured movement could be validated in vitro and in vivo as well. Those findings supported the possibility of applying RSA for helping evaluate the head-taper corrosion related failure (trunnionosis).

Authors with CRIS profile

Jing Xu Departement of Orthopaedic Surgery Raimund Forst Departement of Orthopaedic Surgery Frank Seehaus Departement of Orthopaedic Surgery

Involved external institutions

Universitätsklinikum Heidelberg DE Germany (DE)

How to cite

APA:

Xu, J., Sonntag, R., Kretzer, J.P., Taylor, D., Forst, R., & Seehaus, F. (2020). Model-based roentgen stereophotogrammetric analysis to monitor the head-taper junction in total hip arthroplasty in vivo-and they do move. Materials, 13(7). https://doi.org/10.3390/ma13071543

MLA:

Xu, Jing, et al. "Model-based roentgen stereophotogrammetric analysis to monitor the head-taper junction in total hip arthroplasty in vivo-and they do move." Materials 13.7 (2020).

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