Ulnar Variance
– Discussion: – mean ulnar variance is 0.9 mm (range: 4.2 to 2.3 mm); – functional anatomy: – w/ neutral variance, 80% of load is born by radius and 20% by ulna; – 2.5 mm increase in ulnar varience will increase … Read more
Arthritis
Ulnar drift: of MP joints
– See: – MP joint deformities – Distal Ulna Arthroplasty – Rheumatoid Hand – Anatomical Contributing Factors: (to ulnar drift) – normal mechanical advantage of the ulnar intrinsic muscles – asymmetry & ulnar slope of MC heads of index & middle fingers; – asymmetry of the collateral … Read more
Ulna-Humeral Arthroplasty
– Discussion: – see: elbow flexion contracture; – indicated for patients w/ loss of motion (out of functional range from 30 to 130 deg) due to anterior and posterior osteophytes; – PreOp Planning and Positioning: – patient is supine w/ bump placed under shoulder, and arm folded across chest; … Read more
Ulna / Ulnar Shaft Fracture
div class=”mh-row clearfix”> h1>/h1> div class=”bodycopy”>hr size=”3″/> br/> a href=”/image4/ulna1.jpg”>img src=”/image4/ulna1a.jpg” alt=””/>/a> a href=”/image4/ulna2.jpg”>img src=”/image4/ulna2a.jpg” alt=””/>/a> a href=”/image4/ulna3.jpg”>img src=”/image4/ulna3a.jpg” alt=””/>/a>br/> br/> – See:br/> – a href=”/bones/radius-ulna/adult-both-bone-forearm-frx/”>Both Bone Forearm Fracture:/a> / a href=”/orthopaedics/ulnar-styloid-process-frx/”>Ulnar Styloid/a> Processbr/> br/> strong>- Anatomy:/strong>br/> – radius & ulna lie parallel to each other when forearm is supinated;br/> … Read more
Types of Orthopaedic Infections
– Orthopaedic Infection Menu – bacterial menu – infectious tenosynovitis – diabetic foot infections – hand infections – THR infections – TKR Infections – septic arthritis – necrotizing soft tissue infections: – osteomyelitis (Cierney Classification) – spinal infection / osteomyelitis … Read more
Type IV (Medial) Tibial Plateau Fractures
– See: – Tibial Plateau Frx Menu: Bicondylar Fractures and Type V Frx, Type IV Fractures, Total Depression Fracture – Discussion: – frx of medial tibial plateau (see total depression frx): – carries worst prognosis of all tibial plateau fractures; – 2 subsets of injury: … Read more
Type I Transepiphyseal Separation
– Discussion: – least common pediatric femoral neck frx (about 7%); – capital femoral epiphysis may stay w/in acetabulum but in 50% of cases the capital fragment is dislocated; – tends to occur in infants and young children; – this injury may be the result of a … Read more
Total Shoulder Replacement
– Discussion: – see shoulder replacement discussion (total shoulder vs hemiarthroplasty vs reverse arthroplasty) – the indications for total shoulder arthroplasty (versus hemiarthroplasty) are controversial; – there is some controversy regarding pain relief and component survivorship; – Gartsman GM, et al (2000), the authors compared hemiarthroplasty (24 … Read more
Tuberculosis
– Discussion: – although the disease is generally more likely to be chronic, acute mycobacterial arthritis has been reported; – periarticular bone lesions may accompany the synovial involvement; – pulmonary tuberculosis is evident in only half the patients with skeletal involvement; – pulmonary TB signs vary with stage of dz, few early on; – later … Read more
Triple Arthrodesis
– See: – Blair Fusion – Charcot Marie Tooth – Equinovalgus – Grice Arthrodesis – Kocher approach – Ollier incision – Subtalar Fusion – Discussion: – results in fusion of subtalar, calcaneocuboid, and talonavicular joints; – most effective … Read more