Friberg Equation to Predict Pediatric Distal Forearm Fracture Remodeling

Treatment Choice of Complete Distal Forearm Fractures in 8 to 14 Years Old Children

BACKGROUND

New surgical techniques have challenged traditional guidelines for nonsurgical treatment in pediatric and adolescent distal forearm fractures. This study was performed to compare outcomes and costs between closed reduction with percutaneous pinning (CRPP) and closed reduction with casting in the treatment of complete distal forearm fractures in children 8 to 14 years old.

METHODS

A retrospective cohort study was performed of 175 displaced distal forearm fractures treated with 2 different methods in the emergency department of a children's trauma center. One hundred and fourteen children were managed using CRPP. The remaining 61 were treated with closed reduction and casting. All patients had initial follow-up radiographs. The quality of reduction and the residual angulation in both the coronal and sagittal planes were recorded. Outcomes included the angulation after reduction, residual angulation at final follow-up, radiation exposure, total immobilization time, days absent from school, total costs, and postoperative complications.

RESULTS

The postreduction sagittal plane angulation was significantly lower in the CRPP group (P=0.037). While residual deformity between the groups at the 6-month final follow-up was not significantly different in either the sagittal or coronal planes (P=0.486, 0.726), patients in the nonoperative group received greater radiation than those in the operative group (P<0.001). Patients in the nonoperative group missed fewer classes and sustained lower costs (P<0.001, <0.001). The mean immobilization time in each group was not significantly different (31.4±4.4 vs. 32.8±5.9 d; P=0.227).

CONCLUSIONS

Although the postreduction quality was a little better and radiation exposure was less in the CRPP group, there was no difference between the 2 groups in angulation, total immobilization time, or complication rates after 6 months. The cost and time absent from school of patients in the nonoperative group was significantly lower than in the operative group. There is no clear advantage to CRPP treatment on outcomes. Therefore, closed reduction and casting is recommended in complete distal forearm fractures of children 8 to 14 years old.

LEVEL OF EVIDENCE

Level III-therapeutic study.

Management of Distal Radius Fractures in Adolescent Patients

BACKGROUND

While management recommendations for distal radius fractures in both young and skeletally mature patients have been generally well-established, controversy still exists regarding optimal management in adolescent patients approaching skeletal maturity. Thus, the goal of this review is to analyze relevant literature and provide expert recommendations regarding the management of distal radius fractures in this patient population.

METHODS

A PubMed search was performed to identify literature pertaining to distal radius fractures in adolescent patients, defined as 11 to 14 years in girls and 13 to 15 years in boys. Relevant articles were selected and summarized.

RESULTS

Distal radius fractures demonstrate significant potential for remodeling of angular deformity and bayonet apposition, even in patients older than 12 years of age. Rotational forearm range of motion and functional outcomes are acceptable with up to 15 degrees of residual angulation. Closed reduction and percutaneous pinning reduces fracture redisplacement but has a high associated complication rate. There is no literature comparing plate versus pin fixation of distal radius fractures in the pediatric population, but in adults plate fixation is associated with higher cost with no improvement in long-term functional outcomes.

CONCLUSIONS

Remodeling can still be expected to occur in adolescent patients, and even with residual deformity functional outcomes after distal radius fractures are excellent. Up to 15 degrees of residual angulation can be accepted before considering operative management. Smooth pins should be considered over plates as first-line operative management for unstable fractures that fail nonoperative treatment.

Coronal Remodeling Potential of Pediatric Distal Radius Fractures

BACKGROUND

Distal radius fractures in the pediatric population are common injuries with a remarkable capability to remodel. The degree of angulation that can reasonably be expected to remodel is controversial though, particularly when it comes to angulation in the coronal plane. The purpose of this study was to quantify the rate of coronal remodeling, via the distal radius physis, present in a retrospective cohort of skeletally immature patients with coronally angulated distal radius fractures.

METHODS

A retrospective chart review was performed to identify skeletally immature patients treated for an angulated distal radius fracture with over 10 degrees of angulation in the coronal plane during the healing process at a single institution by either a pediatric orthopaedic surgeon or an orthopaedic trauma surgeon from 2009 to 2018. Coronal angulation was measured at every visit where radiographs were available from time of injury to the final follow-up visit to determine the rate of remodeling.

RESULTS

In total, 36 patients with distal radius fractures with a mean age of 7.93 years (range, 4 to 12 y) at the time of injury were identified. The median peak angulation during the healing process in the coronal plane was 17 degrees (range, 12.4 to 30.4 degrees). The mean follow-up period was 6.4 months from the time of maximum angulation to the final visit. The median time from cast removal to final follow-up was 6.59 months (range, 2.5 to 8.72 mo). At final follow-up, the median coronal angulation was 3.35 degrees (range, 0.24 to 14.0 degrees). At the 95% confidence level, remodeling rates ranged from 2.00 to 2.59 degrees per month. The mean rate of coronal angulation remodeling from maximum angulation to final follow-up was 2.30 degrees per month.

CONCLUSIONS

Distal radius fractures have a large capacity to remodel in the pediatric population. This remodeling occurs in a predictable and reliable manner, even in the coronal plane. On the basis of this study, coronal angulation was shown to remodel at a rate of at least 2 degrees per month for the first 6 months following the injury, which should likely continue at a similar rate for the first year after the injury. Repeat manipulation is not indicated in skeletally immature patients where the maximum coronal angulation is <24 degrees, which provides a conservative estimate of the amount of remodeling that can be expected to occur in the first year after fracture.

LEVEL OF EVIDENCE

Level III-retrospective comparative study.