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. 2024 Jun;48(6):1453-1461.
doi: 10.1007/s00264-024-06153-0. Epub 2024 Apr 6.

The fate of the malrotated elbow supracondylar fractures in children: is varus really a problem?

Ignacio Sanpera  1 , Marta Salom  2 , Ana Fenandez-Ansorena  3 , Guillem Frontera-Juan  4 , Gabriel Pizà-Vallespir  3
Affiliations

The fate of the malrotated elbow supracondylar fractures in children: is varus really a problem?

Ignacio Sanpera et al. Int Orthop. 2024 Jun.

Abstract

Purpose: To evaluate the functional and cosmetic effects of elbow supracondylar fractures (SCF) in children with residual rotational deformity.

Methods: Retrospective review cohort of patients with evidence of malrotation after treatment for SCF. An analysis of the postoperative X-ray of 305 consecutive SCF type 3 treated surgically during five years identified 46 elbows with rotational deformity that fulfilled the selection criteria and were recalled for review; only 27 patients agreed to participate. Patients were evaluated clinically and radiographically. Clinically, the elbow and shoulder ROM were assessed. The postoperative fracture rotation (PFR) was radiologically measured using the Berdis method. Results were categorized according to Flynn criteria, and functional outcomes were evaluated with the QuickDASH questionnaire. On final assessment, a radiograph of both elbows was obtained, and measures were compared. Descriptive analysis was made calculating median, range, proportions, and confidence intervals. Non-parametric tests were used to test the association between variables.

Results: The group had a median age of four years and a median follow-up of 52 months. Shoulder rotation was asymmetrical in 13 patients; six patients presented a change on carrying angle > 5° (4 varus/2 valgus). The higher the residual rotation, the higher the chances of an altered shoulder rotation (for each degree of PFR, the shoulder rotation was changed to 0.4°). However, there was a low correlation between the amount of rotation and the final carrying angle (r = 0.37). According to Flynn's criteria, over 95% had excellent or good results.

Conclusion: There was a weak correlation between varus and rotational malalignment. Patients with moderate residual malrotation could be expected to have a good outcome even if some shoulder rotation changes persist.

Keywords: Acquired; Deformity; Elbow; Elbow fractures, supracondylar; Rotation; Treatment outcome.

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