BME-345 Orthopaedic Biomechanics Exam 2 May 25, Name: SOLUTIONS. This exam is closed book, closed notes. There are 5 sections/questions.

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1 BME-345 Orthopaedic Biomechanics Exam 2 May 25, 2018 Name: SOLUTIONS This exam is closed book, closed notes. There are 5 sections/questions. Grade: #1 / 18 #2 / 20 #3 / 24 #4 / 18 #5 / 20 Final Grade / of 8

2 1. Complete the crossword puzzle using the clues. Each answer is worth 2 pts. Total 18 pts 1 u 2 h y a 3 l i n e u h 4 d p a y u p s s p p y l 5 s a n 6 b 7 g l u t e u s m a x i m u s r i p r i a p s a 8 l i a d a n t g e 9 p e r t h e s a l i p Created with TheTeachersCorner.net Crossword Puzzle Generator Across Down 2. Cartilage covering the surface of the knee and hip joint 1. Injury resulting in damage to 3 structure in the knee (2 (hyaline) words) (unhappy t riad) 7. Largest muscle in the hip joint (2 words) (glut eus 3. Autoimmune disease that attacks healthy joints, also maximus) causes a rash on the chest (lupus) 9. Disease cause by avascular necrosis of the hip 4. Condition where the hip socket is abnormally shallow (pert hes) (dysplasia) 5. Syndrome where the ilopsoas tendon catches on the femoral head (2 words) (snapping hip) 6. Fluid filled sac providing cushion between bones and muscles/tendons (bursa) 8. Collateral ligament located on the outside of the knee joint (lat eral) 2 of 8

3 2. Label the components of the knee. 20 pts 3 of 8

4 3. Analyze the following images. (a) Name the muscles of the quadriceps that the letters A, B, C, and D are pointing to. What is the main function of this muscle group? 10 pts The function of this muscle group is the extension of the knee. (b) What are the images in A and B showing? What are the causes and treatment of the condition in B? 6 pts A is showing a healthy knee joint and B is showing a knee joint with osteoarthritis. A B The causes of OA are: Misalignment of bones Mechanical injury Excessive body weight Loss of strength in muscles supporting joint Treatment of OA can include physical therapy, NSAIDs, and Total Knee replacement surgery. 4 of 8

5 (c) Name the type of tear to the meniscus depicted by A, B, and C? What is the function of the meniscus? 8 pts A B C A is a radial tear B is degradation C is a bucket handle tear The menisci protect the ends of the bones and helps distribute the stress between the tibial and femoral condyles. 5 of 8

6 4. Label the ligaments and structures of the hip depicted in the figures. What are the functions of A and B? 18 points A: increases the depth of the acetabulum making it more stable B: Main role is a conduit for a small artery to the head of the femur 6 of 8

7 BME-345 Orthopaedic Biomechanics Exam 2 5. (a) Name the adductor muscles at A, B, C, and D. 8 pts A: Adductor Brevis B: Adductor Longus C: Adductor Magnus D: Gracillis D A B C (b) What injury is depicted in this X-ray? What are possible causes and what is a treatment option? 6 pts This xray depicts an intertrochanteric fracture. The cause of this is typical a fall on the hip with osteoporosis also affecting the bone quality. The treatment for this is usually a compression hip screw, an intrameduallary nail, or total hip arthroplasty 7 of 8

8 (c) What injury is depicted in this X-ray? What are possible causes and what are treatment options? 6 pts The injury depicted in the xray is a hip dislocation. The is typically a bad fall or an impact like in a car accident. The treatment is usually closed reduction where the hip is rotated such that the femoral head pops back into the acetabulum. An open reduction can be done, which is involves surgery to put the femoral head back in place and repair possible soft tissue damage. Complications with a hip dislocation are possible labrum tears and damage to the ligamentum teres which can lead to osteonecrosis. 8 of 8