Osteoarthritis. Dr Anthony Feher. With special thanks to Dr. Tim Williams and Dr. Bhatia for allowing me to use some of their slides
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1 Osteoarthritis Dr Anthony Feher With special thanks to Dr. Tim Williams and Dr. Bhatia for allowing me to use some of their slides
2 No Financial Disclosures
3 Number one chronic disability in the United States 54 million Americans ( 22.7% adults) IN 1.39 million with 599K reporting activity limitations. By 2040 about 78.4 million Americans Arthritis
4 Indiana Statistics General statistics Adults with arthritis 1,336,000 1,385,000 1,390,000 Adults limited by arthritis a 605, , ,000 Percentage of adults with arthritis Percentage of women and men with arthritis 32/23 32/24 30/25 Percentage of whites, blacks, and Hispanics with arthritis 28/27/10 29/25/13 30/23/ b Percentage of 18- to 44-year olds with arthritis Percentage of 45- to 64-year olds with arthritis Percentage of adults aged 65 years or older with arthritis Percentage of adults with arthritis who are inactive Percentage of arthritis among adults with diabetes Percentage of arthritis among adults with hypertension Percentage of arthritis among adults with obesity
5 Arthritis The incidence of osteoarthritis and gout increased significantly between 1995 and 2005, while that of rheumatoid arthritis declined in part because of more restrictive classification criteria. Source: Helmick CG et al. Arthritis Rheum. 2008;58:15-35
6 Osteoarthritis Non-inflammatory degenerative joint disease Multifactorial - Ageing - Genetics - Hormones - Mechanics - Trauma affects several joints
7 EPIDEMIOLOGY Affects all ethnic groups in all geographic locations By age of 40, 90% have some DJD in weight bearing joints, asymptomatic. >1/3 of people >45yr report joint symptoms Most common cause of long term disability in >65 yrs F>M; <45 yrs males more affected, >55 females more affected Obesity increases incidence
8 MOLECULAR BIOLOGY IL-1 leads to catabolic effect stromelysin and plasmin, both secreted by chondrocytes, have degradative action against cartilage Tissue inhibitor of metalloproteinase inhibits the degradative action of stromelysin
9 CARTILAGE DESTRUCTION IN OSTEOARTHRITIS Increase in water content 90%(as a result of the disruption in architecture of the matrix molecules)(different than decreased water content seen with normal aging process) interleukin-1 chondrocyte activity and proliferation metalloproteinase levels cathepsins B and D levels stiffness of articular cartilage Proteoglycan synthesis and degradation
10 CARTILAGE DESTRUCTION IN OSTEOARTHRITIS Decrease in proteoglycan quantity and size quantity of collagen cross-linking Keratan sulfate concentration reduced Modulus of elasticity Chondrocyte size and number collagen abnormalities
11 Characteristic histology shows loss of superficial chondrocytes replication and breakdown of the tidemark fissuring cartilage destruction with eburnation of subchondral bone Histology
12 Pain Stiffness Loss of motion Crepitus Joint tenderness Palpable osteophytes Deformity Muscle atrophy Effusion Presentation
13 IMAGING Radiographs are typically the most useful 1) Joint space narrowing 2) Bone eburnation, subchondral sclerosis 3) Subchondral cysts 4) Osteophytes 5) Loose bodies 6) Deformity and malalignment
14 IMAGING MRI sensitive in early stage. cartilage thinning, patchy or complete loss shown well NM scan sensitive but not specific CT not routinely utilized
15 Hip Arthritis
16 Hip OA
17 Hip OA
18 Joint Pain Stiffness SYMPTOMS Usually anterior groin / trochanteric Can radiate posteriorly Concurrent bursitis common (due to mechanical abnormalities) Usually less than 30 min of stiffness Stinchfield sign + Forced Internal Rotation painful and restricted
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26 AMERICAN COLLEGE OF RHEUMATOLOGY Clinical Criteria Clinicoradiographic 1) Hip Pain 2a) Internal Rotation <15 deg 2b) ESR <44 Or 3a) Internal Rotation >15 deg 3b) Morning Stiffness <60 min 3c) Age >50 3d) Pain on internal Rotation 1) Hip pain + 2 of: 2a) ESR <20 2b) Osteophytes 2c) Joint space narrowing
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30 Medical Management
31 AAOS Guidlines
32 AAOS guidlines
33
34 Cane in opposite hand reduces joint reactive force by 30-60%
35 ROM & Strengthening Ex Aquatic Ex esp for obese Manual therapy Aerobic ex Relaxation ex Biofeedback Stress management Weight loss
36
37 OPERATIVE MODALITIES Valgus extension Osteotomy Resurfacing arthroplasty Total Hip Arthroplasty Arthrodesis limited option Excision arthroplasty not a good option
38 Knee Osteoarthritis
39 ACL INJURY AND PATTERN OF OA Varus knees with intact ACL more wear on anterior and middle aspect of medial tibial plateau. Absence of ACL leads to more posterior wear on medial tibial plateau in varus knees. Contrary valgus knees with or without ACL insufficiency caused wear posterior to the center of the lateral tibial plateau.
40 PCL INJURY AND PATTERN OF OA Increased contact forces on MFC and patella Increased deterioration over time over medial and patellofemoral cartilage Effect of isolated PCL injury over DJD varies, combined Quadriceps and presence of meniscal damage rapidly causes degeneration
41 TREATMENT Nonoperative supportive measures weight loss has the strongest supporting evidence as an effective nonoperative treatment for osteoarthritis of the knee (Pts who have BMI>25, should lose >5% body weight)aaos Guidelines Walking better than running Self management techniques-activity, exercises and lifestyle modification Acetaminophen /NSAIDS
42 AAOS Guidlines
43 TREATMENT AAOS RECOMMENDATIONS Low impact aerobic exercises-effect of pain relief in symptomatic OA of knee statistically significant Quadriceps strengthening Patellar taping-no use Lateral Heel wedges- not of help Braces do NOT help Acupuncture with no proven benefit Glucosamine /chondroitin sulphates -? Benefit Gl/Ch arthritis Intervention trial
44 AAOS Guidlines
45 MEDICAL TREATMENT IN PTS WITH GI UPSET Acetaminophen [not to exceed 4 grams per day] Topical NSAIDs Nonselective oral NSAIDs plus gastroprotective agent Cyclooxygenase-2 (COX-II) inhibitors
46 TREATMENT Intra-articular corticosteroids for short-term pain relief Operative Arthroscopic partial meniscectomy or loose body removal is an option in patients with symptomatic OA of the knee with mechanical symptoms total joint replacement TKA UKA, Bicompartmental Arthroplasty Arthrodesis- selected limited patients
47 OPERATIVE TREATMENT Realignment osteotomy is an option in active patients with symptomatic unicompartmental OA of the knee with malalignment. Others : Soft tissue grafts- Periosteal/perichondral graft Chondrocyte transplantation- med femoral condyle defects Artificial matrix- Collagen, bone matrix, polylactic acid used to create matrix to allow cartilage to grow Fresh osteochondral grafts /OATS
48 Thank you! Dr. Williams will now discuss total joint arthroplasty.
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