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. 2021 Sep 8;16(1):551.
doi: 10.1186/s13018-021-02707-9.

Trampoline-related fractures of the proximal tibia in children

Changhoon Jeong  1 , Sang Uk Lee  2 , Hyun Gyun Kim  2 , Sun Young Joo  3
Affiliations

Trampoline-related fractures of the proximal tibia in children

Changhoon Jeong et al. J Orthop Surg Res. .

Abstract

Background: Trampoline-related fractures of the proximal tibial metaphysis are common in children and have been linked to subsequent valgus deformity of the tibia. The purpose of this study was to investigate the characteristics of trampoline-related proximal tibial fractures in young children.

Methods: We evaluated 40 patients with proximal tibial fracture after trampolining between 2013 and 2019. The median duration of follow-up was 18 months. Standing long leg radiographs were obtained at the last follow-up to evaluate angular deformity and limb length inequality in the patients. The measurements recorded include the lower limb length, mechanical lateral distal femoral angle (mLDFA), medial proximal tibial angle (MPTA), mechanical axis deviation (MAD), and anatomical tibio-femoral angle (aTFA). The anterior tilt angle (ATA) was measured using a lateral radiograph of the tibia.

Results: The median age at injury was 40.0 months. Using trampoline with a heavier person was the most common mechanism of injury. aTFA and MAD were found to be increased towards the valgus at the last follow-up in our patient; however, the increase was not statistically significant (p = 0.692 and p = 0.973, respectively). The anterior tilt angle was increased in the injured leg at the last follow-up. But the change was not statistically significant (p = 0.09).

Conclusions: Using trampoline with a heavier person carries the risk of trampoline-related proximal tibial fracture in young children. We did not find a significant change in limb alignment at a minimum of one year of follow-up.

Keywords: Children; Fracture; Proximal tibia; Trampoline.

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Conflict of interest statement

Not applicable.

Figures

Fig. 1
Fig. 1
The anterior tilt angle. The proximal line of the angle is defined by drawing a tangent between the dorsal and mid-point of the physis. The distal line of the angle is defined by drawing a tangent between the dorsal and ventral epiphyseal plate of the distal physis
Fig. 2
Fig. 2
Fracture pattern. Cortical buckling (A), anterior scooping of the notch for the tibial tubercle (B), complete cortical break (C), and fracture obliquity directed toward the physis (D)
See this image and copyright information in PMC

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