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Metatarsal protrusion angle: values of normality
Gabriel Domínguez1, Pedro V Munuera, Mercedes Lomas
1Department of Podiatrics, University of Seville, Seville, Spain. gdominguez@us.es
Background:
We performed an adaptation of the system of evaluation of metatarsal protrusion described by Oller in 1994 to study the metatarsal parabola group.
Methods:
The system of measurement was applied to the five metatarsals of 169 normal feet (72 feet of women and 97 feet of men) according to the inclusion criteria established.
Results:
The mean +/- SD metatarsal protrusion angle with respect to the second ray in women was 87.49 degrees +/- 5.48 degrees for metatarsal I, 70.00 degrees +/- 5.74 degrees for metatarsal III, 63.47 degrees +/- 4.17 degrees for metatarsal IV, and 56.38 degrees +/- 3.27 degrees for metatarsal V. In men, the values were 85.30 degrees +/- 6.75 degrees for metatarsal I, 68.00 degrees +/- 6.72 degrees for metatarsal III, 60.56 degrees +/- 4.61 degrees for metatarsal IV, and 54.13 degrees +/- 3.75 degrees for metatarsal V. The comparative analysis between women and men showed significant differences (P < .05) for all of the values of metatarsal protrusion.
Conclusions:
The comparative analysis between women and men indicates a possible difference between the anthropometric values of these variables in humans, suggesting a possible repercussion on the biomechanical patterns by sex.
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