TO CORRELATE THE WEIGHT OF LONG BONES, HUMERI AND FEMORA WITH THEIR VERTICAL HEAD DIAMETERS

Objective: To evaluate the correlation of bone weight with their vertical diameter of head in humeri and femora bilaterally
and also to compare this effect observed in humeri with that of femora.
Material and Methods: This study was carried out on cadaveric bones in Anatomy Department KGMC Peshawar. A
total of 13 pairs of humeri and 14 pairs of femora were selected for this purpose. The weight and vertical diameter of
head of each bone was noted and recorded on observation sheets. All these measurements were done with help of
vernier caliper and electronic scale. The difference observed in measurement of weight and diameter of humeri and
femora were compared and analyzed for conclusion.
Results: The mean bony weight, and vertical diameter of head of each humerus was measured. The mean weight of
right humeri were 119.91±6.60g and the mean weight of left humeri were 113.33±7.39g. The mean vertical diameter
of right humeral head was 42.37±1.19 mm and mean vertical diameter of left humeral head was 43.58±1.06 mm.
The mean weight of right femora were 339.85±12.91g and the mean weight of left femora were 325.78 ±26.71g. The
mean vertical diameter right femoral head was 46.42±0.61mm and the mean vertical diameter of left femoral head
was 44.71±1.15mm.
Conclusion: More asymmetry were noted when weight of right and left humeri were compared with that of right and
left femora but less asymmetry noted when humeral head diameter were compared with that of femoral head diameter
bilaterally. This was interesting to note that the diameter of humeral head were rather decreasing with increasing
weight of humeri in contrast to femora where heavier right femora were associated with longer femoral head diameter.
Keywords: Diameter of humeral head, Diameter of femoral head, Weight of long bone.