(3) In medicolegal practice, it is possible to estimate the total length of bone, if the ratio between the total length and the distance of nutrient foramen from both the ends is known.
The nutrient foramen on the posterior surface of the tibia was noted and counted.
In the present study, a single nutrient foramen was more prevalent in females (99.3%), while double nutrient foramina was recorded to be predominant in males (1.8%) which may indicate a degree of sexual dimorphism in the Black population group that is native to South Africa.
These observations were also similar to that of Mysorekar who reported the location of the nutrient foramen as infero-medial, inferior but directly opposite the middle of the bone and infero-lateral along the interrosseous crest.
The largest nutrient foramen in 19(42.2%) bones was located at the level of proximal one-third of linea aspera; in 17 (37.8%) bones at the level of middle one-third; and in 9 (20%) bones at the level of lower one-third of linea aspera (Figure).
In another study,11 the most common location of the largest nutrient foramen was at the level of the upper one-third of linea aspera.
It is measured from the most proximal part of the head of the femur to the nutrient foramen
by sliding calipers.
Morphological and topographical anatomy of nutrient foramen
in the lower limb long bones.
Surface of bone on which nutrient foramen
Foraminal index (FI) (Hughes et al., 1952)--The FI was calculated by using the formula, FI= (DNF*TL)/100, where DNF is the distance from the proximal end of the bone to the nutrient foramen
and TL is the total bone length.
The nutrient foramen
lies at the lateral end of the groove.
Single nutrient foramen
on lateral surface of proximal 1 /3 of shaft.