In vivo kinematics of fixed-bearing total ankle arthroplasty. Issue 4 (June 2020)

• Record Type: Journal Article
• Authors: Casaroli, Gloria; Villa, Tomaso; Bianchi, Alberto; Caboni, Eleonora; Malerba, Francesco; Galbusera, Fabio; Martinelli, Nicolò
• Is Part Of: Foot and ankle surgery. Volume 26:Issue 4(2020)
• Page Start: 371
• Page End: 377
• Publication Date: 2020-06
• Subjects: TAA total ankle arthroplasty -- TKA total knee arthroplasties -- THA total hip arthroplasties -- UHMWPE ultra high molecular weight polyethylene -- ROM range of motion -- ZTMTA Zimmer total metal total ankle arthroplasty -- VAS visual analog scale for pain -- AOFAS American orthopedic foot and ankle score; Three dimensional video fluoroscopy -- Replaced joint mobility -- Total ankle arthroplasty -- Gait; Foot -- Surgery -- Periodicals; Ankle -- Surgery -- Periodicals; Ankle -- surgery -- Periodicals; Foot -- surgery -- Periodicals; Ankle -- Surgery; Foot -- Surgery; Periodicals; Electronic journals; 617.58
• DOI: 10.1016/j.fas.2019.04.012
• Languages: English
• ISSNs: 1268-7731

Abstract

Highlights: In patients with ZTMTA, dorsi-plantarflexion is the main movement. The relative rotations are comparable to the values of healthy patients. ZTMTA guarantees a good mobility in flexion-extension. The mobility of ZTMTA is still low during stair climbing and descending. The study of the kinematics shows the effect of the misalignment of the components. Abstract: Background: A good recovery of the physiological mobility of the ankle is an indication of patients' satisfaction after total ankle arthroplasty, which does not generally match that of other consolidated procedures such as hip and knee replacement. The aim of this study was to investigate the kinematics of the Zimmer Total Metal Total Ankle (ZTMTA) during the different exercises. Methods: Fifteen patients with ZTMTA were enrolled in this study. The patients performed non-weightbearing flexion-extension, stair climbing and descending, and fluoroscopic images were taken to capture the ankle movements. A combined images/three-dimensional models method was used to perform a kinematic analysis. Results: Plantar-dorsiflexion resulted the main plane of movement, with the largest range of motion (ROM) of 23.3 ± 9.0° during flexion-extension. Inversion–eversion and adduction–abduction resulted lower than 10° in any trials. Conclusions: In the investigated population, the ZTMTA allowed a good recovery of the mobility, with ROMs comparable to the healthy subjects.