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Feasibility of model-based Roentgen Stereophotogrammetric Analysis to evaluate early migration of the trapeziometacarpal joint prosthesis.

Ooms EM, ten Brinke B, Mathijssen NM, Blom IF, Deijkers RL, Kraan GA - BMC Musculoskelet Disord (2015)

Bottom Line: The measurement error is good for the translations but high for the rotations.The latter is due to the close position of the markers relative to each other.Level of evidence III.

View Article: PubMed Central - PubMed

Affiliation: Centre for Orthopaedic Surgery, OCON, Hand and Wrist unit, Hengelo, The Netherlands. e.ooms@zgt.nl.

ABSTRACT

Background: The purpose of this study was to determine the feasibility of Roentgen Stereophotogrammetric Analysis (RSA) in total joint arthroplasty of the trapeziometacarpal (TMC) joint of the thumb.

Methods: In five cadaveric hands the TMC-joint was replaced by the Surface Replacement Trapeziometacarpal prosthesis (SR™ TMC prosthesis; Avanta, San Diego, CA) and tantalum beads of 0.8 mm were implanted for RSA. RSA radiographs in two directions were made in ten positions to calculate the measurement error. Migration values from zero are indicative for the measurement error. The number of detected markers was recorded.

Results: The accuracy analysis showed that for the translations the mean measurement error varied between 0.003 mm (SD 0.057) and 0.055 mm (SD 0.133). For the rotations values ranged from 0.034° (SD 1.759) to 0.502° (SD 1.617).

Conclusions: RSA analysis of the SR™ TMC prosthesis is feasible. The measurement error is good for the translations but high for the rotations. The latter is due to the close position of the markers relative to each other. Level of evidence III.

No MeSH data available.


Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component, markers in the polyethylene metacarpal component and the markers in inserted in bone (first metacarpal and trapezium). (if in colour print): Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component (green), markers in the polyethylene metacarpal component (purple) and the markers in inserted in bone (first metacarpal and trapezium, red)
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Fig3: Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component, markers in the polyethylene metacarpal component and the markers in inserted in bone (first metacarpal and trapezium). (if in colour print): Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component (green), markers in the polyethylene metacarpal component (purple) and the markers in inserted in bone (first metacarpal and trapezium, red)

Mentions: A reversed engineered three-dimensional surface model of the trapezium component of the SR™ TMC prosthesis was prepared for model-based RSA analysis (Introtech, Nuenen, The Netherlands) [19]. After the surgical procedure, RSA radiographs were made using a carbon fibre calibration box (Medis specials, Leiden, The Netherlands) and two synchronized roentgen tubes. RSA radiographs were performed of all hands in two commonly used positions for imaging of the TMC joint (Robert view and lateral view). The number of visually detected markers for each bone/implant was recorded. Of each hand, ten pairs of RSA radiographs were made. After each radiograph, the hand was replaced and rotated a few degrees. The radiographs were imported in a software program for model-based RSA (Model-based RSA 3.11, Medis specials, Leiden, The Netherlands) and the ‘migration’ of the prosthesis between the RSA radiographs was calculated (Fig. 3). All markers (i.e. fiducial, control and intra-ossal) and the prosthesis were marked manually in both planes. Paired migrations were performed to calculate the ‘migration’ between all ten positions of each hand. To obtain the accuracy of the performed technique, mean errors and standard deviations were calculated for all translations and rotations.Fig. 3


Feasibility of model-based Roentgen Stereophotogrammetric Analysis to evaluate early migration of the trapeziometacarpal joint prosthesis.

Ooms EM, ten Brinke B, Mathijssen NM, Blom IF, Deijkers RL, Kraan GA - BMC Musculoskelet Disord (2015)

Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component, markers in the polyethylene metacarpal component and the markers in inserted in bone (first metacarpal and trapezium). (if in colour print): Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component (green), markers in the polyethylene metacarpal component (purple) and the markers in inserted in bone (first metacarpal and trapezium, red)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4607147&req=5

Fig3: Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component, markers in the polyethylene metacarpal component and the markers in inserted in bone (first metacarpal and trapezium). (if in colour print): Model based RSA scene of the implanted SR TMC prosthesis. 3D reconstruction image in the centre of the figure shows the position of the trapezium component (green), markers in the polyethylene metacarpal component (purple) and the markers in inserted in bone (first metacarpal and trapezium, red)
Mentions: A reversed engineered three-dimensional surface model of the trapezium component of the SR™ TMC prosthesis was prepared for model-based RSA analysis (Introtech, Nuenen, The Netherlands) [19]. After the surgical procedure, RSA radiographs were made using a carbon fibre calibration box (Medis specials, Leiden, The Netherlands) and two synchronized roentgen tubes. RSA radiographs were performed of all hands in two commonly used positions for imaging of the TMC joint (Robert view and lateral view). The number of visually detected markers for each bone/implant was recorded. Of each hand, ten pairs of RSA radiographs were made. After each radiograph, the hand was replaced and rotated a few degrees. The radiographs were imported in a software program for model-based RSA (Model-based RSA 3.11, Medis specials, Leiden, The Netherlands) and the ‘migration’ of the prosthesis between the RSA radiographs was calculated (Fig. 3). All markers (i.e. fiducial, control and intra-ossal) and the prosthesis were marked manually in both planes. Paired migrations were performed to calculate the ‘migration’ between all ten positions of each hand. To obtain the accuracy of the performed technique, mean errors and standard deviations were calculated for all translations and rotations.Fig. 3

Bottom Line: The measurement error is good for the translations but high for the rotations.The latter is due to the close position of the markers relative to each other.Level of evidence III.

View Article: PubMed Central - PubMed

Affiliation: Centre for Orthopaedic Surgery, OCON, Hand and Wrist unit, Hengelo, The Netherlands. e.ooms@zgt.nl.

ABSTRACT

Background: The purpose of this study was to determine the feasibility of Roentgen Stereophotogrammetric Analysis (RSA) in total joint arthroplasty of the trapeziometacarpal (TMC) joint of the thumb.

Methods: In five cadaveric hands the TMC-joint was replaced by the Surface Replacement Trapeziometacarpal prosthesis (SR™ TMC prosthesis; Avanta, San Diego, CA) and tantalum beads of 0.8 mm were implanted for RSA. RSA radiographs in two directions were made in ten positions to calculate the measurement error. Migration values from zero are indicative for the measurement error. The number of detected markers was recorded.

Results: The accuracy analysis showed that for the translations the mean measurement error varied between 0.003 mm (SD 0.057) and 0.055 mm (SD 0.133). For the rotations values ranged from 0.034° (SD 1.759) to 0.502° (SD 1.617).

Conclusions: RSA analysis of the SR™ TMC prosthesis is feasible. The measurement error is good for the translations but high for the rotations. The latter is due to the close position of the markers relative to each other. Level of evidence III.

No MeSH data available.