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Related Experiment Video

Updated: May 1, 2026

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
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Subtalar joint stress imaging with tomosynthesis.

Atsushi Teramoto1, Kota Watanabe, Hiroyuki Takashima

  • 1Department of Orthopedic Surgery (AT, KW, TY), Sapporo Medical University, Sapporo, Hokkaido, Japan.

Foot & Ankle Specialist
|April 2, 2014
PubMed
Summary

Tomosynthesis provides clear hindfoot imaging, revealing the subtalar joint range of motion (ROM) in healthy individuals. This technique quantifies inversion and eversion, showing approximately 15° total ROM in healthy ankles.

Keywords:
range of motionstress imagingsubtalar jointtomosynthesis

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Area of Science:

  • Orthopedics
  • Radiology
  • Biomechanics

Background:

  • The subtalar joint is crucial for foot function.
  • Accurate assessment of subtalar joint range of motion (ROM) is important for diagnosing foot and ankle conditions.

Purpose of the Study:

  • To evaluate the utility of tomosynthesis for stress imaging of hindfoot inversion and eversion.
  • To assess the subtalar joint ROM in healthy subjects using this imaging technique.

Main Methods:

  • Coronal tomosynthesis stress imaging of the subtalar joint was performed on 30 ankles of 15 healthy volunteers.
  • A Telos stress device applied 150 N of inversion and eversion stress.
  • Measurements were taken from tomographic images of the posterior talocalcaneal joint.

Main Results:

  • Tomosynthesis provided a clearer depiction of the subtalar joint.
  • Mean calcaneal angle change was 10.3° with inversion and 5.0° with eversion from neutral.
  • Healthy subjects demonstrated an approximate 15° total ROM for subtalar joint inversion and eversion.

Conclusions:

  • Tomosynthesis is effective for stress imaging of the subtalar joint.
  • This method allows for quantitative assessment of subtalar joint ROM in healthy individuals.
  • The findings establish a baseline ROM for healthy subtalar joints using tomosynthesis.