Kinematic Accuracy in Tracking Total Wrist Arthroplasty With Biplane Videoradiography Using a Computed Tomography-Generated Model

Akhbari, Bardiya; Morton, Amy M.; Moore, Douglas C.; Weiss, Arnold‐Peter C.; Wolfe, Scott W.; Crisco, Joseph J.

doi:10.1115/1.4042769

Cited by 8 publications

(10 citation statements)

References 33 publications

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“…Kinematic analysis was performed for the TWA patients via model‐based tracking of the radial component and carpal component 36 . The models for the radial component and the polyethylene cap were generated by scanning a Freedom implant using a high‐resolution (0.1 mm) 3D laser scanner (Space Spider; Artec 3D, LU).…”

Section: Methodsmentioning

confidence: 99%

“…The models for the radial component and the polyethylene cap were generated by scanning a Freedom implant using a high‐resolution (0.1 mm) 3D laser scanner (Space Spider; Artec 3D, LU). The model for the carpal component, consisting of the base and the two screws, was generated via segmentation of the CT scan using Mimics v19 software (Materialise NV, Leuven, BE) 36 . Additionally, the radii of the contralateral wrists of the three TWA patients who had CT scans were segmented with the same procedure for further coordinate system (CS) construction to describe the wrist kinematics.…”

Section: Methodsmentioning

confidence: 99%

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Proximal‐distal shift of the center of rotation in a total wrist arthroplasty is more than twice of the healthy wrist

Akhbari

Morton

Shah

et al. 2020

Journal Orthopaedic Research

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Reproduction of healthy wrist biomechanics should minimize the abnormal joint forces that could potentially result in the failure of a total wrist arthroplasty (TWA). To date, the in vivo kinematics of TWA have not been measured and it is unknown if TWA preserves healthy wrist kinematics. Therefore, the purpose of this in vivo study was to determine the center of rotation (COR) for a current TWA design and to compare its location to the healthy wrist. The wrist COR for six patients with TWA and 10 healthy subjects were calculated using biplane videoradiography as the subjects performed various range‐of‐motion and functional tasks that included coupled wrist motions. An open‐source registration software, Autoscoper, was used for model‐based tracking and kinematics analysis. It was demonstrated that the COR was located near the centers of curvatures of the carpal component for the anatomical motions of flexion‐extension and radial‐ulnar deviation. When compared to healthy wrists, the COR of TWAs was located more distal in both pure radial deviation (P < .0001) and pure ulnar deviation (P = .07), while there was no difference in its location in pure flexion or extension (P = .99). Across all coupled motions, the TWA's COR shifted more than two times that of the healthy wrists in the proximal‐distal direction (17.1 vs 7.2 mm). We postulate that the mismatch in the COR location and behavior may be associated with increased loading of the TWA components, leading to an increase in the risk of component and/or interface failure.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Proximal‐distal shift of the center of rotation in a total wrist arthroplasty is more than twice of the healthy wrist

Akhbari

Morton

Shah

et al. 2020

Journal Orthopaedic Research

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“…To develop a BVR setup and evaluate its accuracy, we used optical motion capture (OMC) technique as the gold standard comparator that has shown a submillimeter accuracy in our experimental setup (Akhbari et al, 2019). For all experiments, both methods simultaneously captured the wrist motion (third metacarpal motion relative to the radius), and then they were compared for accuracy assessment.…”

Section: Methodsmentioning

confidence: 99%

Accuracy of biplane videoradiography for quantifying dynamic wrist kinematics

Akhbari¹,

Morton²,

Moore³

et al. 2019

Journal of Biomechanics

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Accurately assessing the dynamic kinematics of the skeletal wrist could advance our understanding of the normal and pathological wrist. Biplane videoradiography (BVR) has allowed investigators to study dynamic activities in the knee, hip, and shoulder joint; however, currently, BVR has not been utilized for the wrist joint because of the challenges associated with imaging multiple overlapping bones. Therefore, our aim was to develop a BVR procedure and to quantify its accuracy for evaluation of wrist kinematics. BVR was performed on six cadaveric forearms for one neutral static and six dynamic tasks, including flexion-extension, radial-ulnar deviation, circumduction, pronation, supination, and hammering. Optical motion capture (OMC) served as the gold standard for assessing accuracy. We propose a feedforward tracking methodology, which uses a combined model of metacarpals (second and third) for initialization of the third metacarpal (MC3). BVR-calculated kinematic parameters were found to be consistent with the OMCcalculated parameters, and the BVR/OMC agreement had submillimeter and sub-degree biases in tracking individual bones as well as the overall joint's rotation and translation. All dynamic tasks (except pronation task) showed a limit of agreement within 1.5° for overall rotation, and within 1.3 mm for overall translations. Pronation task had a 2.1° and 1.4 mm limit of agreement for rotation and translation measurement. The poorest precision was achieved in calculating the pronationsupination angle, and radial-ulnar and volar-dorsal translational components, although they were sub-degree and submillimeter. The methodology described herein may assist those interested in examining the complexities of skeletal wrist function during dynamic tasks.

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“…Biplanar videoradiography (BVR) is an imaging technique that is used for computing the in vivo motion of other joints with high accuracy. [26][27][28][29][30][31][32][33] Thus, in this study, we used a BVR system to evaluate the mechanism of motion of DRUJ by analyzing specifically (1) UV and (2) COR during active pronosupination. We hypothesized that UV would be most positive at full pronation and that it would reduce as the forearm rotates towards full supination, where it would reach its minimum value.…”

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confidence: 99%

Biomechanics of the Distal Radioulnar Joint During In Vivo Forearm Pronosupination

et al. 2021

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Background Ulnar variance (UV) and center of rotation (COR) location at the level of the distal radioulnar joint (DRUJ) change with forearm rotation. Nevertheless, these parameters have not been assessed dynamically during active in vivo pronosupination. This assessment could help us to improve our diagnosis and treatment strategies. Questions/purposes We sought to (1) mathematically model the UV change, and (2) determine the dynamic COR's location during active pronosupination. Methods We used biplanar videoradiography to study DRUJ during in vivo pronation and supination in nine healthy subjects. UV was defined as the proximal-distal distance of ulnar fovea with respect to the radial sigmoid notch, and COR was calculated using helical axis of motion parameters. The continuous change of UV was evaluated using a generalized linear regression model. Results A second-degree polynomial with R 2 of 0.85 was able to model the UV changes. Maximum negative UV occurred at 38.0 degrees supination and maximum positive UV occurred at maximum pronation. At maximum pronation, the COR was located 0.5 ± 1.8 mm ulnarly and 0.6 ± 0.8 mm volarly from the center of the ulnar fovea, while at maximum supination, the COR was located 0.2 ± 0.6 mm radially and 2.0 ± 0.5 mm volarly. Conclusion Changes in UV and volar translation of the COR are nonlinear at the DRUJ during pronosupination. Clinical Relevance Understanding the dynamic nature of UV as a function of pronosupination can help guide accurate evaluation and treatment of wrist pathology where the UV is an important consideration. The dynamic behavior of COR might be useful in designing DRUJ replacement implants to match the anatomical motion.

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Kinematic Accuracy in Tracking Total Wrist Arthroplasty With Biplane Videoradiography Using a Computed Tomography-Generated Model

Cited by 8 publications

References 33 publications

Proximal‐distal shift of the center of rotation in a total wrist arthroplasty is more than twice of the healthy wrist

Proximal‐distal shift of the center of rotation in a total wrist arthroplasty is more than twice of the healthy wrist

Accuracy of biplane videoradiography for quantifying dynamic wrist kinematics

Biomechanics of the Distal Radioulnar Joint During In Vivo Forearm Pronosupination

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