Exam 1) Orthotics Exam 1: Questions & Answers: Updated Solution

How many Salter-Harris classifications for physis fractures are there? (Ans- 5 (T1-T5) What area of bone does a T1 fracture impact? (Ans- physis only (growth plate only) What area of bone does a T2 fracture impact? (Ans- Physis and metaphysis What area of bone does a T3 fracture impact? (Ans- Physis and epiphysis What area of bone does a T4 fracture impact? (Ans- Physis, metaphysis, and epiphysis What does T5 fracture indicate? (Ans- a complete crush of the physis, the worst prognosis. Hypermobility and defects of epiphyseal plate growth are considered what type of congenital abnormality? (Ans- Generalized (whole body) Aplasia, hypoplasia, duplication, and failures of segmentation are considered what type of congenital abnormality? (Ans- Localized (affecting only one area of the body) What percentage of metatarsus adductus is associated with developmental hip dysplasia? (Ans- 15% Talipes equinovarus (clubfoot) is due to what arrangement of the talus and calcaneus? (Ans- A lack of the normal divergence between them, aka they are lined up A painful bump at the insertion point of the tibialis posterior indicates what? (Ans- presence of an accessory tarsal navicular bone Proximal femoral focal deficiency is associated with what other congenital abnormality? (Ans- tibial hemimelia (small or absent tibia) Out of all medical imaging processes, which one exposes the patient to the most radiation? (Ans- CT scan What % of limb length comes from the femur? From the tibia? (Ans- 55% from femur, 45% from tibia. What % of tibial length comes from the proximal physis, and what % from the distal physis? (Ans- 55% from the proximal physis, and 45% from the distal physis. What % of femoral length comes from the proximal physis, and what % from the distal physis? (Ans- 30% from the proximal, 70% from the distal physis If a growth plate fracture affects the DISTAL FEMORAL physis, what % of overall limb length will be affected? (Ans- Femur makes up 55% of limb length Distal physis makes up 70% of femur length 0.55 x 0.7 = 0.385, or 38.5% If a growth plate fracture affects the PROXIMAL TIBIAL physis, what % of overall limb length will be affected? (Ans- the tibia makes up 45% of overall limb length