In the present study, CFLs harvested from cadavers were categorized according to the differences in the angle of the CFL with respect to the long axis of the fibula and their shape, and then three-dimensional reconstructions of the CFLs were used to simulate and examine the differences in the angles of the CFLs with respect to the long axis of the fibula and how they affect CFL function.
The study sample included 81 ft from 43 Japanese cadavers. CFLs were categorized according to their angle with respect to the long axis of the fibula and the number of fiber bundles. Five categories were subsequently established: CFL20° (angle of the CFL with respect to the long axis of the fibula from 20° to 29°); CFL30° (range 30–39°); CFL40° (range 40–49°); CFL50° (range 50–59°); and CFL2 (CLFs with two crossing fiber bundles). Three-dimensional reconstructions of a single specimen from each category were then created. These were used to simulate and calculate CFL strain during dorsiflexion (20°) and plantarflexion (30°) on the talocrural joint axis and inversion (20°) and eversion (20°) on the subtalar joint axis.
In terms of proportions for each category, CFL20° was observed in 14 ft (17.3%), with CFL30° in 22 ft (27.2%), CFL40° in 29 ft (35.8%), CFL50° in 15 ft (18.5%), and CFL2 in one foot (1.2%). Specimens in the CFL20° and CFL30° groups contracted with plantarflexion and stretched with dorsiflexion. In comparison, specimens in the CFL40°, CFL50°, and CFL2 groups stretched with plantarflexion and contracted with dorsiflexion. Specimens in the CFL20° and CFL2 groups stretched with inversion and contracted with eversion.
CFL function changed according to the difference in the angles of the CFLs with respect to the long axis of the fibula.
Lapointe SJ, et al. Changes in the flexibility characteristics of the ankle complex due to damage to the lateral collateral ligaments: an in vitro and in vivo study. J Orthopaedic Res. 1997;15:331–41. CrossRef
Sarrafian SK. Syndesmology. Sarrafian's anatomy of the foot and ankle. 3rd ed. Phiradelphia: Lippincott Williams & Wilkin; 2011. p. 163–222.
Ruth CJ. The surgical treatment of injuries of the fibular collateral ligaments of the ankle. J Bone Joint Surg Am. 1961;25:229–39. CrossRef
Kitsoulis P, et al. Morphological study of the calcaneofibular ligament in cadavers. Folia Morphol (Warsz). 2011;70:180–4.
Morris JM. Biomechanics of the foot and ankle. Clin Orthop Relat Res. 1977;122:10–7.
Kongsgaard M, et al. Region specific patellar tendon hypertrophy in humans following resistance training. Acta Physiologica (Oxford, England). 2007;191:111–21. CrossRef
Edama M, et al. Differences in the degree of stretching applied to Achilles tendon fibers when the calcaneus is pronated or supinated. Foot Ankle Online J. 2016;9:5. CrossRef
Edama M, et al. Anatomical study of the inferior patellar pole and patellar tendon. Scand J Med Sci Sports. 2017; 10.1111/sms.12858. [Epub ahead of print]
- The effects on calcaneofibular ligament function of differences in the angle of the calcaneofibular ligament with respect to the long axis of the fibula: a simulation study
- BioMed Central
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