Anterior placement of the talar component in total ankle arthroplasty: A risk factor for talar component subsidence. Issue 3 (April 2021)

• Record Type: Journal Article
• Authors: Yamamoto, Tetsuya; Nagai, Kanto; Kanzaki, Noriyuki; Nukuto, Koji; Yamashita, Takahiro; Ibaraki, Kazuyuki; Araki, Daisuke; Hoshino, Yuichi; Matsushita, Takehiko; Kuroda, Ryosuke
• Is Part Of: Foot and ankle surgery. Volume 27:Issue 3(2021)
• Page Start: 311
• Page End: 315
• Publication Date: 2021-04
• Subjects: Total ankle arthroplasty -- Talar component -- Subsidence; 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.2020.05.014
• Languages: English
• ISSNs: 1268-7731

Abstract

Highlights: The investigation on the relationship between talar component placement and subsidence amount after the total ankle arthroplasty was performed. Greater subsidence of the talar component was observed when the component was placed more anteriorly. Anterior placement of the talar component should be avoided to prevent the subsidence following the surgery. Abstract: Background: Component subsidence is considered as a cause of revision surgery. The talar component subsidence may be a risk factor for revision surgery; however, there are no reports regarding talar component placement and subsidence amount following total ankle arthroplasty (TAA). We therefore investigated the relationship between talar component placement and subsidence amount. Methods: Fifty-two ankles from 49 patients (age: 71 years [range 62–83], 13 male/ 36 female), who underwent TAA with mean follow-up of 36 months (range 12–83), were included. The subjects were divided into two groups based on talar component placement: anterior placement (n = 20, group A) and posterior placement (n = 32, group P) using weight-bearing lateral plain radiographs. The amount of the talar component subsidence and clinical outcomes, which included the Japanese Society for Surgery of the Foot (JSSF) scale, range of the motion (ROM) and the revision rate, were compared between the groups. Results: Talar component subsidence was significantly higher in group A (2.1 ± 2.0 mm) than in group P (0.6 ± 1.4 mm, P = .017). There was no significant difference in the JSSF scale and ROM between group A and group P. The revision rate was 10.0% in group A and 6.3% in group P, albeit not statistically significant. Conclusion: Greater talar component subsidence was observed when the talar component was placed more anteriorly, suggesting that anterior placement of the talar component may need to be avoided during the surgery in order to minimize the postoperative talar component subsidence.