Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up

C. Trozzi, B. L. Kaptein, E. H. Garling, T. Shelyakova, A. Russo, L. Bragonzoni, S. Martelli

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Model-based Roentgen Stereophotogrammetric Analysis (RSA) was recently developed for the measurement of prosthesis micromotion. Its main advantage is that markers do not need to be attached to the implants as traditional marker-based RSA requires. Model-based RSA has only been tested in uniplanar radiographic set-ups. A biplanar set-up would theoretically facilitate the pose estimation algorithm, since radiographic projections would show more different shape features of the implants than in uniplanar images. We tested the precision of model-based RSA and compared it with that of the traditional marker-based method in a biplanar set-up. Micromotions of both tibial and femoral components were measured with both the techniques from double examinations of patients participating in a clinical study. The results showed that in the biplanar set-up model-based RSA presents a homogeneous distribution of precision for all the translation directions, but an inhomogenous error for rotations, especially internal-external rotation presented higher errors than rotations about the transverse and sagittal axes. Model-based RSA was less precise than the marker-based method, although the differences were not significant for the translations and rotations of the tibial component, with the exception of the internal-external rotations. For both prosthesis components the precisions of model-based RSA were below 0.2 mm for all the translations, and below 0.3° for rotations about transverse and sagittal axes. These values are still acceptable for clinical studies aimed at evaluating total knee prosthesis micromotion. In a biplanar set-up model-based RSA is a valid alternative to traditional marker-based RSA where marking of the prosthesis is an enormous disadvantage.

Original languageEnglish
Pages (from-to)396-402
Number of pages7
JournalKnee
Volume15
Issue number5
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Knee Prosthesis
Prostheses and Implants
Thigh

Keywords

  • Fixation
  • Knee prosthesis
  • Micromotion
  • Pose estimation
  • RSA

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Trozzi, C., Kaptein, B. L., Garling, E. H., Shelyakova, T., Russo, A., Bragonzoni, L., & Martelli, S. (2008). Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up. Knee, 15(5), 396-402. https://doi.org/10.1016/j.knee.2008.05.001

Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up. / Trozzi, C.; Kaptein, B. L.; Garling, E. H.; Shelyakova, T.; Russo, A.; Bragonzoni, L.; Martelli, S.

In: Knee, Vol. 15, No. 5, 10.2008, p. 396-402.

Research output: Contribution to journalArticle

Trozzi, C, Kaptein, BL, Garling, EH, Shelyakova, T, Russo, A, Bragonzoni, L & Martelli, S 2008, 'Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up', Knee, vol. 15, no. 5, pp. 396-402. https://doi.org/10.1016/j.knee.2008.05.001
Trozzi C, Kaptein BL, Garling EH, Shelyakova T, Russo A, Bragonzoni L et al. Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up. Knee. 2008 Oct;15(5):396-402. https://doi.org/10.1016/j.knee.2008.05.001
Trozzi, C. ; Kaptein, B. L. ; Garling, E. H. ; Shelyakova, T. ; Russo, A. ; Bragonzoni, L. ; Martelli, S. / Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up. In: Knee. 2008 ; Vol. 15, No. 5. pp. 396-402.
@article{1ee9ac98cae54adb9478d872ccac9889,
title = "Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up",
abstract = "Model-based Roentgen Stereophotogrammetric Analysis (RSA) was recently developed for the measurement of prosthesis micromotion. Its main advantage is that markers do not need to be attached to the implants as traditional marker-based RSA requires. Model-based RSA has only been tested in uniplanar radiographic set-ups. A biplanar set-up would theoretically facilitate the pose estimation algorithm, since radiographic projections would show more different shape features of the implants than in uniplanar images. We tested the precision of model-based RSA and compared it with that of the traditional marker-based method in a biplanar set-up. Micromotions of both tibial and femoral components were measured with both the techniques from double examinations of patients participating in a clinical study. The results showed that in the biplanar set-up model-based RSA presents a homogeneous distribution of precision for all the translation directions, but an inhomogenous error for rotations, especially internal-external rotation presented higher errors than rotations about the transverse and sagittal axes. Model-based RSA was less precise than the marker-based method, although the differences were not significant for the translations and rotations of the tibial component, with the exception of the internal-external rotations. For both prosthesis components the precisions of model-based RSA were below 0.2 mm for all the translations, and below 0.3° for rotations about transverse and sagittal axes. These values are still acceptable for clinical studies aimed at evaluating total knee prosthesis micromotion. In a biplanar set-up model-based RSA is a valid alternative to traditional marker-based RSA where marking of the prosthesis is an enormous disadvantage.",
keywords = "Fixation, Knee prosthesis, Micromotion, Pose estimation, RSA",
author = "C. Trozzi and Kaptein, {B. L.} and Garling, {E. H.} and T. Shelyakova and A. Russo and L. Bragonzoni and S. Martelli",
year = "2008",
month = "10",
doi = "10.1016/j.knee.2008.05.001",
language = "English",
volume = "15",
pages = "396--402",
journal = "Knee",
issn = "0968-0160",
publisher = "Elsevier",
number = "5",

}

TY - JOUR

T1 - Precision assessment of model-based RSA for a total knee prosthesis in a biplanar set-up

AU - Trozzi, C.

AU - Kaptein, B. L.

AU - Garling, E. H.

AU - Shelyakova, T.

AU - Russo, A.

AU - Bragonzoni, L.

AU - Martelli, S.

PY - 2008/10

Y1 - 2008/10

N2 - Model-based Roentgen Stereophotogrammetric Analysis (RSA) was recently developed for the measurement of prosthesis micromotion. Its main advantage is that markers do not need to be attached to the implants as traditional marker-based RSA requires. Model-based RSA has only been tested in uniplanar radiographic set-ups. A biplanar set-up would theoretically facilitate the pose estimation algorithm, since radiographic projections would show more different shape features of the implants than in uniplanar images. We tested the precision of model-based RSA and compared it with that of the traditional marker-based method in a biplanar set-up. Micromotions of both tibial and femoral components were measured with both the techniques from double examinations of patients participating in a clinical study. The results showed that in the biplanar set-up model-based RSA presents a homogeneous distribution of precision for all the translation directions, but an inhomogenous error for rotations, especially internal-external rotation presented higher errors than rotations about the transverse and sagittal axes. Model-based RSA was less precise than the marker-based method, although the differences were not significant for the translations and rotations of the tibial component, with the exception of the internal-external rotations. For both prosthesis components the precisions of model-based RSA were below 0.2 mm for all the translations, and below 0.3° for rotations about transverse and sagittal axes. These values are still acceptable for clinical studies aimed at evaluating total knee prosthesis micromotion. In a biplanar set-up model-based RSA is a valid alternative to traditional marker-based RSA where marking of the prosthesis is an enormous disadvantage.

AB - Model-based Roentgen Stereophotogrammetric Analysis (RSA) was recently developed for the measurement of prosthesis micromotion. Its main advantage is that markers do not need to be attached to the implants as traditional marker-based RSA requires. Model-based RSA has only been tested in uniplanar radiographic set-ups. A biplanar set-up would theoretically facilitate the pose estimation algorithm, since radiographic projections would show more different shape features of the implants than in uniplanar images. We tested the precision of model-based RSA and compared it with that of the traditional marker-based method in a biplanar set-up. Micromotions of both tibial and femoral components were measured with both the techniques from double examinations of patients participating in a clinical study. The results showed that in the biplanar set-up model-based RSA presents a homogeneous distribution of precision for all the translation directions, but an inhomogenous error for rotations, especially internal-external rotation presented higher errors than rotations about the transverse and sagittal axes. Model-based RSA was less precise than the marker-based method, although the differences were not significant for the translations and rotations of the tibial component, with the exception of the internal-external rotations. For both prosthesis components the precisions of model-based RSA were below 0.2 mm for all the translations, and below 0.3° for rotations about transverse and sagittal axes. These values are still acceptable for clinical studies aimed at evaluating total knee prosthesis micromotion. In a biplanar set-up model-based RSA is a valid alternative to traditional marker-based RSA where marking of the prosthesis is an enormous disadvantage.

KW - Fixation

KW - Knee prosthesis

KW - Micromotion

KW - Pose estimation

KW - RSA

UR - http://www.scopus.com/inward/record.url?scp=50449108996&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50449108996&partnerID=8YFLogxK

U2 - 10.1016/j.knee.2008.05.001

DO - 10.1016/j.knee.2008.05.001

M3 - Article

VL - 15

SP - 396

EP - 402

JO - Knee

JF - Knee

SN - 0968-0160

IS - 5

ER -