COF Pediatric Orthotics 1 — Questions and Answers
Question 1: What is the primary indication for prescribing a Supramalleolar Orthosis (SMO) in a pediatric patient?
- Correcting rigid clubfoot deformity
- Providing medial-lateral ankle stability for children with hypotonia (Correct answer)
- Managing tibial stress fractures
- Treating Legg-Calvé-Perthes disease
Correct answer: Providing medial-lateral ankle stability for children with hypotonia
SMOs are designed to provide medial-lateral stability at the subtalar joint and are commonly prescribed for hypotonic children who exhibit excessive pronation and instability.
Question 2: At approximately what age does the longitudinal arch of the foot typically become fully established in children?
- 6 months to 1 year
- 1 to 2 years
- 3 to 8 years (Correct answer)
- After age 12
Correct answer: 3 to 8 years
The longitudinal arch is obscured by a fat pad in infants and begins to develop as the child walks; it is typically fully visible and established between ages 3 and 8.
Question 3: Which orthosis is the standard of care for maintaining correction in a child with idiopathic clubfoot (talipes equinovarus) after completing the Ponseti serial casting protocol?
- Dynamic ankle-foot orthosis (DAFO)
- Ponseti foot abduction brace (Dennis Browne bar) (Correct answer)
- Solid ankle AFO
- Supramalleolar orthosis (SMO)
Correct answer: Ponseti foot abduction brace (Dennis Browne bar)
The Ponseti foot abduction brace (Denis Browne bar with open-toe shoes) is the proven device used after casting to maintain clubfoot correction and prevent relapse.
Question 4: How frequently should growth and fit be reassessed when a pediatric patient is wearing a custom AFO?
- Every 2 years
- Every 6 to 12 months
- Every 3 to 6 months (Correct answer)
- Only when the child complains of discomfort
Correct answer: Every 3 to 6 months
Rapid skeletal growth in children necessitates reassessment every 3 to 6 months to ensure the orthosis still fits correctly and has not become restrictive.
Question 5: A Dynamic Ankle-Foot Orthosis (DAFO) differs from a solid AFO primarily in that it:
- Completely immobilizes the ankle in plantarflexion
- Provides total-contact support while allowing controlled range of motion (Correct answer)
- Is used exclusively for post-surgical stabilization
- Only addresses hindfoot alignment
Correct answer: Provides total-contact support while allowing controlled range of motion
DAFOs are designed with thin, flexible trim lines that provide full plantar contact and proprioceptive input while permitting controlled, functional ankle motion.
Question 6: Which condition is the PRIMARY indication for a Pavlik harness in infants?
- Clubfoot (talipes equinovarus)
- Developmental dysplasia of the hip (DDH) (Correct answer)
- Idiopathic scoliosis
- Genu varum (bowlegs)
Correct answer: Developmental dysplasia of the hip (DDH)
The Pavlik harness is the first-line orthotic treatment for developmental dysplasia of the hip in infants, maintaining hip flexion and abduction to seat the femoral head in the acetabulum.
Question 7: What material property is MOST critical when selecting thermoplastic materials for pediatric orthoses compared to adult orthoses?
- Maximum rigidity for long-term structural integrity
- Dark pigmentation to conceal wear and soiling
- Low-temperature formability to facilitate frequent remolding as the child grows (Correct answer)
- Highest possible cost to ensure superior quality
Correct answer: Low-temperature formability to facilitate frequent remolding as the child grows
Because children outgrow devices rapidly, materials that can be remolded at low temperatures (e.g., low-temperature thermoplastics) allow orthotists to adjust fit without fabricating an entirely new device.
COF Pediatric Orthotics 1
What is the primary indication for prescribing a Supramalleolar Orthosis (SMO) in a pediatric patient?