Determination of contact hip stress from nomograms based on mathematical model

Nomograms are presented that enable determination of maximal stress on the hip joint weight bearing area if certain geometrical parameters of the hip and pelvis and the body weight are known. The nomograms are calculated by u sing previously developed mathematical models. It is demonstrated how the m aximal stress on the hip joint weight bearing area is determined from the p resented nomograms for a hip for which the geometrical parameters were obta ined from a standard anteroposterior rentgenograph. This simple and noninva sive method may give insight into the biomechanical status of the hip which should be considered in routine surgical planning and as a part of the rou tine examination of the patient without the use of any additional tools. (C ) 2001 IPEM. Published by Elsevier Science Ltd. All rights reserved.