Abstract : Background: The vertebral column, sacrum, iliac bones and the lower limbs form a co-ordinated articular
system with the two joints i.e., the hip joint and sacroiliac joint (SIJ). Our current understanding of
biomechanics of this region is still quite inadequate, particularly with regard to multidirectional activities
i.e. sports involving twisting and turning.
Materials and Methods: We have examined 160 normal adult hip bones. In each hip bone the outline
of symphyseal, auricular and lunate acetabular surface area was marked on tracing paper. The surface area
was then measured by digital planimeter.
Aim: An attempt has been made to correlate the various articular areas of hip bone and to find if any
correlation exists between them applying Karl Pearson’s correlation coefficient formula.
Results: The average surface area of auricular surface for the two sides was 9.88cm2; that of lunate articular
part of acetabulum 17.20cm2 and of pubis symphysis was found to be 2.60cm2. Further, differences
between the two sexes have also been evaluated. In general, all the surface areas were found to be larger in
males and more on the right side as compared to left.
Conclusion: There is a positive correlation seen between auricular and acetabular area; acetabular and
symphyseal area and auricular and symphyseal area on both the sides. The findings of the present work can
help in the better understanding of the normal kinematics of these joints and the resultant effects due to
their dysfunction. Further it can help physiotherapists to properly plan out the treatment.
Keywords: Acetabulum, Auricular surface, Hip bone, Lunate articular surface, Pubic symphysis.