Background: distal radial buckle fractures are common injuries in children. the ideal immobilization technique is controversial. Few, retrospective studies have been conducted to evaluate bone healing after casting versus splinting. However, the impact of the immobilization technique on daily function and comfort has not been evaluated.

Objective: To compare the impact on daily function, comfort and satisfaction of casting versus splinting in children with distal radial buckle fractures.

Primary Hypothesis: Children with short arm casts to immobilize a distal radial buckle fracture will have a greater reduction in daily activities compared to those immobilized with a volar splint.

Secondary Hypothesis: Children who are immobilized in a short arm cast will have less pain, less patient/parental satisfaction, more adverse effects, fewer follow-up visits, longer emergency department (ED) treatment time. Furthermore, we hypothesize that all fractures will have acceptable alignment/healing at the follow-up orthopaedic clinic evaluation.

Methods: A randomized controlled trial will be conducted in children 2 to 17 years old with a radio graphically confirmed distal radial buckle fracture. Exclusion criteria will include skeletal maturity, previous distal radius fracture, concurrent other fracture(s), osteogenesis imperfecta or other metabolic bone disease. Enrolled subjects will be randomized to receive either a short arm cast or a volar wrist splint. The pediatric emergency department attending physician will be responsible for applying or directly supervising the immobilization technique. All subjects' radiographs will be reviewed by a pediatric orthopaedic surgeon with 1 day to confirm diagnosis and measure fracture angulation. Those subjects with unacceptable angulation will be called and asked to return to the ED or orthopaedic clinic for re-evaluation.

Outcomes Measures: The primary outcome measure will be the Peds QL questionnaire to assess impact on daily function. This will be assessed at baseline in the ED, by phone at 1 day, 3 days and 1 week after the ED visit, and at the orthopaedic clinic follow-up visit 3 weeks after the ED visit. Secondary outcome measures will include questionnaires assessing demographic data (baseline), pain, satisfaction, adverse effects (baseline, immediately after immobilization applied, 1 day, 3days and 1 week after ED visit by phone, and at the 3 week orthopaedic clinic follow-up visit), and ED treatment time (in ED prior to discharge). At the 3 week orthopaedic surgery clinic follow-up visit, an assessment of the integrity of the immobilization technique will be conducted by a cast technician and fracture alignment/healing and range of motion of affected arm will be conducted by the pediatric orthopaedic surgeon who will be blinded to treatment group.

Inclusion Criteria:

• 2 - 17 years
• radiographically confirmed distal radial buckle fracture

Exclusion Criteria:

• skeletal maturity
• previous distal radius fracture
• concurrent other fracture
• osteogenesis imperfecta or other metabolic bone disease