BACKGROUND: The tibio-calcaneal angle (TCA) does not measure individual forefoot contributions to the overall foot balance. Using standard radiographs we calculated the ideal hindfoot alignment based on ground reaction force (GRF), independently from the tibial axis. METHODS: Thirty-six patients (40ft.) were included. Mean age was 56. Weight bearing radiographs were taken. Calcaneal offsets were measured using tibio-calcaneal angles and GRF algorithms. Measurements were compared using the Bland-Altman method. FINDINGS: Both methods agreed (p>0.05) but individual discrepancies were found. Mean measured offsets were -11.5mm (SD: 10.2) using TCA and -8mm (SD: 9.3) using GRF. Mean bias between the methods was -0.88mm. INTERPRETATION: The GRF algorithm successfully measured hindfoot alignment. The absence of a previous gold standard and radiographic variability are a limit. The TCA underestimated calcaneal offset. Discrepancies showed that forefoot position data provided increased accuracy. This could be of particular relevance for surgical planning.
BACKGROUND: The tibio-calcaneal angle (TCA) does not measure individual forefoot contributions to the overall foot balance. Using standard radiographs we calculated the ideal hindfoot alignment based on ground reaction force (GRF), independently from the tibial axis. METHODS: Thirty-six patients (40ft.) were included. Mean age was 56. Weight bearing radiographs were taken. Calcaneal offsets were measured using tibio-calcaneal angles and GRF algorithms. Measurements were compared using the Bland-Altman method. FINDINGS: Both methods agreed (p>0.05) but individual discrepancies were found. Mean measured offsets were -11.5mm (SD: 10.2) using TCA and -8mm (SD: 9.3) using GRF. Mean bias between the methods was -0.88mm. INTERPRETATION: The GRF algorithm successfully measured hindfoot alignment. The absence of a previous gold standard and radiographic variability are a limit. The TCA underestimated calcaneal offset. Discrepancies showed that forefoot position data provided increased accuracy. This could be of particular relevance for surgical planning.
Authors: A Burssens; J Peeters; M Peiffer; R Marien; T Lenaerts; G Vandeputte; J Victor Journal: Int J Comput Assist Radiol Surg Date: 2018-03-09 Impact factor: 2.924
Authors: Alexandre Leme Godoy-Santos; Alessio Bernasconi; Marcelo Bordalo-Rodrigues; François Lintz; Carlos Felipe Teixeira Lôbo; Cesar de Cesar Netto Journal: Radiol Bras Date: 2021 May-Jun
Authors: Sven Y Vetter; Maxim Privalov; Nils Beisemann; Benedict Swartman; Holger Keil; Joachim Kirsch; Paul Alfred Grützner; Jochen Franke Journal: PLoS One Date: 2019-05-31 Impact factor: 3.240
Authors: Cesar de Cesar Netto; Alessio Bernasconi; Lauren Roberts; Pedro Augusto Pontin; Francois Lintz; Guilherme Honda Saito; Andrew Roney; Andrew Elliott; Martin O'Malley Journal: Orthop J Sports Med Date: 2019-02-21