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Ch01_Musculoskeoletal_Sysitem

Ch01_Musculoskeoletal_Sysitem - ORTHOPAEDIC BIOMECHANICS...

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ORTHOPAEDIC BIOMECHANICS Ralph Müller Kathryn Stok Harry van Lenthe Course text book: Orthopaedic Biomechanics: Mechanics and Design in Musculoskeletal Systems Bartel, D.L., Davy, D.T. and Keaveny, T.M.
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Date Topic Responsible 16 Feb The Musculoskeletal System – Ch. 1 R. Müller 23 Feb Loads and Motion in the Musculoskeletal System – Ch. 2 K. Stok 02 Mar Tissue Mechanics II: Soft Tissue – Ch. 4 K. Stok 09 Mar Tissue Mechanics II: Soft Tissue – Ch. 4 continued K. Stok 16 Mar Tissue Mechanics I: Bone – Ch. 3 R. Müller 23 Mar Tissue Mechanics I: Bone – Ch. 3 continued R. Müller CURRICULUM 30 Mar Structural Analysis: Beam Theory – Ch. 5 K. Stok 06 Apr Structural Analysis: Advanced Topics – Ch. 6 H. van Lenthe 13 Apr Easter Monday – no class 20 Apr Sechseläuten – no class 27 Apr Bone-Implant Systems – Ch. 7 R. Müller 04 May Fracture Fixation Devices – Ch. 8 H. van Lenthe 11 May Total Hip Replacements – Industry Visit (Ch. 9) B. Gasser 18 May Total Knee Replacements – Ch. 10 R. Müller 25 May Articulating Surfaces – Ch. 11 K. Stok
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ORTHOPAEDIC BIOMECHANICS Course online: http://www.biomech.ethz.ch/obm/ PDF and PPT files are password protected using your n.ethz account Course requirements: 10 out of 13 classes 8 out of 10 exercises
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The Musculoskeletal System
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Introduction Goal: Apply principles of engineering mechanics to analyze the mechanical and structural functions of the musculoskeletal system Skeletal system as a machine Combination of rigid or resistant bodies With definite motions Capable of performing useful work
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Introduction In most machines we can define the kinematics without regard for the external loads acting on it and the internal forces transmitted from link to link In biological joints, the kinematic constraints at joints are provided by elastic structures (less stiff). Loads across the joint and motions of the joint are coupled Precise measures of stress and motion are difficult but often unnecessary We need models that describe the fundamental behavior of the system The choice of model is critical and is the subject of the subsequent lectures
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Anatomical Overview Anatomical Terms: Proximal Distal Inferior Superior Lateral Medial Anterior Posterior Dorsal Ventral
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Anatomic Position The individual is standing with head and palm facing forward Define three orthogonal anatomical planes Frontal (coronal) plane divides the body front- back Sagittal plane divides the body left-right Transverse plane divides the body top-bottom
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Motions in Anatomical Planes Flexion: movement where the anterior angle between two bones is reduced Extension: opposite of flexion Abduction: movement away from the midline of the body Adduction: movement toward the midline Hyperextension: continuation of motion beyond the anatomic position Lateral flexion: movement of the spine to the right or left, in the frontal plane
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Motions in Anatomical Planes Supination:
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