To Design and Make a Mechanical System for Clinical Studying on Rotational Deformities of Tibia Affecting the Tibiofemoral Contact Pressure under Standing Position Loading of Human Cadavers

Farshidfar, Sara Sadat; Mallakzadeh, Mohammad Reza; Yazdi, Hamid Reza

doi:10.22041/ijbme.2012.13098

To Design and Make a Mechanical System for Clinical Studying on Rotational Deformities of Tibia Affecting the Tibiofemoral Contact Pressure under Standing Position Loading of Human Cadavers

Document Type : Full Research Paper

Authors

Sara Sadat Farshidfar ¹

Mohammad Reza Mallakzadeh ²

Hamid Reza Yazdi ³

¹ M.Sc. Biomechanics Group, School of Mechanical Engineering, Iran University of Science and Technology

² Assistant Professor, Biomechanics Group, School of Mechanical Engineering, Iran University of Science and Technology

³ Assistant Professor, Orthopedics Group, School of Medicine, Tehran University of Medical Science

https://doi.org/10.22041/ijbme.2012.13098

Abstract

The aim of this study was to compare the contact area and pressure within medial and lateral compartments of tibiofemoral joint during internal and external rotational deformities of tibia bone. Methods: five lower extremities of fresh frozen human cadavers were tested by using a mechanical system was designed for the first time in IRAN to simulate the static position loading of standing on two legs in full extension knee under 400N loading along the longitudinal axis of each foot. The contact area and pressure were measured by FUJIfilm Prescale films under axial loading in neutral rotation and serial mal-rotations of tibia from 40 degrees external to 40 degrees internal mal-rotations in 10 degrees increments by tibial osteotomy. Results: contact area and lateral compartment contact pressure was not significantly affected by mal-rotations. Medial compartment contact pressure increased with external and decreased with internal mal-rotations. Changing the medial compartment contact pressure of tibiofemoral joint in various rotational alignments of tibia can be very effective in rapid growth of knee osteoarthritis symptoms specially in people with unilateral medial knee osteoarthritis.

Keywords

knee osteoarthritis

tibial rotations

contact area

contact pressure

tibiofemoral joint

Subjects

Biomechanics of Bone / Bone Biomechanics

[1] B.L. O'Connor and K.D. Brandt, Neurogenic factors in the etiopathogenesis of osteoarthriti; Rheumatic Diseases Clinics of North America, 1993; 19: 581–605.

[2] D.G. Eckhoff, R.C. Kramer, Femoral anteversion and arthritis of the knee; Pediatric Orthop, 1994; 14: 608–610.

[3] T. Yagi, Tibial torsion in patients with medial-type osteoarthrotic knees; Clin Orthop Relat, 1994; 302: 52–56.

[4] M.S. Turner, The association between tibial torsion and knee joint pathology; Clin Orthop Relat, 1994; 302: 47–51.

[5] P. Bretin, P.F. O’Loughlin, Influence of femoral malrotation on knee joint alignment and intra-articular contract pressures; Arch Orthop Trauma Surg, PMID: 21069363.

[6] M. Tanzer, C.A. McLean, Effect of femoral component designs on the contact and tracking characteristics of the unresurfaced patella in total knee arthroplasty; Canadian Journal of Surgery , 2001; 44(2):127–13.

[7] H.A. McKellop, G. Sigholm, The effect of simulated fracture-angulations of the tibia on cartilage pressures in the knee joint; Bone Joint Surg, 1991; 73:1382–1391.

[8] J.J. Gugenheim, R.A. Probe, The effects of femoral shaft malrotation on lower extremity anatomy; Orthop Trauma, 2004; 18: 658–664.

[9] S.K. Lynn, T. Kajaks, P.A. Costigan, The effect of internal and external foot rotation on the adduction moment and lateral-medial shear force at the knee during gait; Sci Med Sport, 2008; 11: 444–451.

[10] A.J. Teichtahl, M.E. Morris, Foot rotation–a potential target to modify the knee adduction moment; Sci Med Sport, 2006; 9: 67–71.

[11] J.R. Davids, R.B. Davis, Tibial torsion: significance and measurement; Gait & Posture, 2007; 26:169–171.

[12] M. Kenawey, E. Liodakis, C. Krettek, Effect of lower limb rotational alignment on tibiofemoral contact pressure; Knee Surg Sport Taumatol Arthrosc, 2011.