Stress Fractures...Talus Pelvis Femoral Head Behrens et al. Stress fractures of the pelvis and legs...
Transcript of Stress Fractures...Talus Pelvis Femoral Head Behrens et al. Stress fractures of the pelvis and legs...
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Stress Fractures
Cory Keller, DOAssociate Professor
Temple Orthopaedics and Sports Medicine
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Disclosures NONE
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Objectives Identify the etiology of stress fractures
Compare and contrast high risk vs low risk stress fractures
Identify treatment strategies for stress fractures
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Stress Fracture Overuse injury
NOT an acute injury
Occurs when muscles fatigue and cannot absorb added shock Overload of stress gets transferred to the bone,
leading to a tiny crack in the bone
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Stress Fractures 0.7-20% of All Sports-related Injuries
Highest Incidence in Sports Track and Field athletes
High prevalence: Gymnastics
Dancing
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Most Common Stress Fx’s• Tibia 23.6%• Tarsal Navicular 17.6%• Metatarsal 16.2%• Fibula 15.5%• Femur 6.6 %• Pelvis 1.6 %
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LOCATION SPORT
Metatarsals Football, basketball, gymnastics, ballet
Sesamoids of the foot Running, ballet, basketball, skating
Navicular Basketball, football, running
Talus Pole Vaulting
Fibula Running, aerobics, ballet
Tibia Running, sports, dancing, ballet
Patella Running, hurdling
Femoral Neck Distance running
Pubic Rami Distance Running
Pars Articularis Gymnastics, ballet, cricket, volleyball, diving, football
Chest, ribs Swimming, golf, rowing
Ulna Racquet sports, volleyball
Olecrenon Baseball, throwing sports
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Bone HealthStress on Bone Distribution of force results in increased stress at focal
points in bone Action of muscle pulling on bone
Osteoblastic vs Osteoclastic Bone stress leads to imbalance Bone Marrow Edema Eventually results in full cortical break
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Risk Factors Change in load on the bone Changes in volume or intensity
Changes in surface
Energy imbalance Calories IN vs Calories OUT
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Risk Factors
Intrinsic• Female
• Amenorrhea
• Low BMD
• Genu Valgus
• Leg length discrepancy
• Poor aerobic fitness at onset of exercise
Extrinsic• Rapid progression of
training• Poor surface• Running and
Jumping sports• Poor footwear• Smoking• Poor nutrition
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Risk Factors
Intrinsic• Pes Planus
• Pes Cavus
• Stiff Joints
• Ligamentous Laxity
• Low Testosterone (males)
Extrinsic• Inadequate rest
periods• >10 alcoholic
beverages per week
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Female Athlete Triad Low energy availability with or without disordered
eating
Menstrual dysfunction
Low bone mineral density
Mary Jane De Souza et al. Br J Sports Med 2014;48:289
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Clinical Presentation Localized bony pain during or after exercise
Typically increases with continued activity
Physical Exam – tenderness to palpation Hop test
Fulcrum test
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Imaging (X-ray) Typically negative
Positive Finding Periosteal reaction
Cortical Defect(Dreaded Black Line)
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MRI Very sensitive for detecting stress injury to bone Sensitivity similar to that of bone scan
MRI more sensitive better to define exact anatomic injury
MRI – no radiation exposure
MRI – takes less time to complete study
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Risk of Delayed UnionHigh Risk Low Risk
Anterior tibial diaphysis Posteromedial Tibia
Lateral Femoral Neck Metatarsals
Patella Calcaneous
Medial Malleolus Cuboid
Navicular Cuneiform
Fifth Metatarsal Fibula
Proximal Second Metatarsal Medial Femoral Neck
Sesamoids Femoral Shaft
Talus Pelvis
Femoral Head
Behrens et al. Stress fractures of the pelvis and legs in the athlete: a review . Sports Health 2013 Vol 5(2) 165-174
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Femoral Neck Stress Fx’s
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Stress Fractures of the Tibia
Differential Dx Medial Tibial Stress Syndrome (MTSS)
Exertional Compartment Syndrome (ECS)
Anterior Cortex vs Medial Cortex Anterior Poor blood supply
Area under tension (bowing tibia)
Often takes 12 months of recovery (+/- bone stim/surgery)
Medial – NWB/rest 6-8 weeks
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Treatment Rest from aggravating activity (4-12 weeks)
Possibly NWB, cross-train accordingly to maintain CV fitness
Immobilize when necessary
Treatment of underlying issue (nutrition, etc) Calcium 1000-1200 mg/d Vit D 600IU/d Female Athlete Triad Coalition Panel recommended Vit D levels 32-50
Pain (Tylenol vs NSAIDs)
Bone Stimulator
Orthotics
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Prevention Screen for Female Athlete Triad
Modify training
Core/hip strengthening and symmetry
Orthotics
Biomechanical evaluation
Nutrition (Vit D, Calcium)
Pain free exercise
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References
Behrens et al. Stress fractures of the pelvis and legs in the athlete: a review . Sports Health 2013 Vol 5(2) 165-174
Henning P, The running athlete. Stress fractures, osteitis pubis, and snapping hips. Sports Health 2014 Vol 6(2) 122-127
Mary Jan De Souza et al. Br J Sports Med 2014;48:289
Patel, D et al. Stress fractures: Diagnosis, Treatment, and Prevention. American Family Physician Vol 83(1), Jan 2011.