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The Journal of Bone and Joint Surgery (American) 83:S142-150 (2001)
© 2001 The Journal of Bone and Joint Surgery, Inc.

Scientific Article

Selected Knee Osteotomies and Meniscal Replacement: Effects on Dynamic Intra-Joint Loading

Jack T. Andrish, MD, Helen E. Kambic, MS, Antonio D.C. Valdevit, MSc, Ryosuke Kuroda, MD, Richard D. Parker, MD, Eric Aronowitz, MD and Theodore Elster, BS

Jack T. Andrish, MD
Helen E. Kambic, MS
Antonio D.C. Valdevit, MSc
Richard D. Parker, MD
Theodore Elster, BS
Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44106

Ryosuke Kuroda, MD
Department of Orthopaedic Surgery, Kobe University Hospital, 7-5-1 Kusunoki-cho, Chu-ku, Kobe 650, Japan

Eric Aronowitz, MD
Schenectady Regional Orthopaedic Associates, 847 Union Street, Schenectady, NY 12308

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. Meniscal transplants were received from Cryolife, Incorporated. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

The first 150 words of the full text of this article appear below.


   Dynamic Range-of-Motion Testing Protocol for Intra-Joint Load Measurement
 
Through the use of pressure-sensitive color film under static loading conditions, intra-joint loads, contact area, and contact pressure have been determined. Intra-joint loads have also been elucidated through the use of computationally intensive computer simulations. We present an experimental technique and loading mechanism that can provide dynamic intra-joint loads during range of motion. The goal of the study was to establish a dynamic range-of-motion testing protocol encompassing measurement of intra-joint loads while retaining the characteristics of joint compressive loads under minimal constraints to motion.

Materials and Methods
Cadaveric knee specimens were mounted in a testing frame as shown in Figure 1. The quadriceps muscle was fastened to the hydraulic actuator of a materials testing machine (MTS Systems, Eden Prairie, Minnesota) through the proximal insertion site of the patellar tendon. The vastus lateralis and medialis and hamstrings muscles were each loaded with 45 N of tensile load at angles of 17°, 50°, and . . . [Full Text of this Article]


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