Weightbearing Assessment of Tarsal Instability

In-Vivo Physiologic Weight-Bearing Assessment of Tarsal Instability: Three-Dimensional Cone-Beam Computed Tomography Analysis

The purpose of this study is to compare the average joint motion and joint axis orientation of the hindfoot bones between patients diagnosed with adult-acquired flatfoot disorder (AAFD) and a control group of patients without foot deformity, using weight-bearing CT technology.

Symptomatic group:

Inclusion Criteria:

1. adult patients (ages 18 -80 years old) diagnosed with Stage 2 AAFD

Exclusion Criteria:

1. previous surgery
2. infection
3. tumor in the affected foot
4. pregnancy

Control group:

Inclusion Criteria:

1. adult patients (ages 18 -80 years old) without foot deformity

Exclusion Criteria:

1. history of previous foot and ankle surgery
2. foot deformity
3. known foot and ankle pathology
4. pregnancy