Estimating Tibia Length: An Anatomical Landmarks Evaluation of Bones and X-ray Radiographs

Abstract

The ability to estimate the length of the bone is a major step towards estimating the stature of an individual in forensic investigation of mass fatalities where body parts are dismembered, scattered and mixed up. This is so because researchers have established that long bone length correlates with stature. Nine parameters of the tibia bone were measured using anthropometric board, anthropometric tape and digital caliper. Five of the nine parameters that could be read on anterior-posterior x-ray radiograph of the tibia measured using a transparent meter rule were used in this study. A total of 600 sample of N = 600, (300 right and 300 left bones) and (320 males: right = 160; left = 160; 280 females: right = 140; left 140 radiographs) obtained from Anatomy museums and hospitals in the six geo-political zones of Nigeria were used in this study. No significant difference (p < 0.05) in the mean value was found between measurements from the bones and those from the anteroposterior x-ray radiographs. The difference in mean for all variables were seen to be significantly (p < 0.05) higher for males compared to females. Results show that the tibia proximal breadth (TPB), medial-lateral diameter at mid-shaft (MLDM) and tibia distal breadth (TDB) were the best predictors of the length of tibia. Thus, in cases of mass fatalities as could happen in a plane crash or bomb blast, the estimate of the fragmented remains of the tibia, when compared with the estimate from an anti-mortem x-ray radiograph, may reveal the identity of the missing individual.