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Articular and angular dimensions of the talus: inter-relationship and biomechanical significance
Niladri Kumar Mahato1, Sathiya Narayana Murthy
1Department of Anatomy, SRM Medical College & Research Centre, Kattankulathur, Kancheepuram District, Tamil Nadu, India. mahatonk@yahoo.co.in
Summary Of Background Data:
Research on biomechanics of the ankle and foot has demonstrated a complex pattern of load distribution through the ankle joint.
Objective:
Investigating possible relationship between articular dimensions, angular parameters and overall talar morphology.
Methods:
Two linear dimensions, six articular surfaces and three angular parameters were measured from dried human talar bones (left=60; right=82). Angular parameters were measured at the neck of the bone (junction of the head and the body). Correlation and co-variation were worked out between the values of surface area parameters and the angular orientations measured from all the samples in context of load transmission across the talus.
Results:
The total trochlear surface area of the talus totaled approximately equal to the sum of areas at the head and the lower surface of the talus. The vertical angle showed a strong correlation with the articulating surface area below the head of the talus in contact with the spring ligament.
Conclusions:
Articular surface areas as well as the angular orientations of talar components vary with the magnitude of stress subjected to the bone. The inter-relationship between articular and angular parameters within the talus demonstrates strong correlation for certain parameters.
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