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BMC Musculoskeletal Disorders

, 18:109

Orthopedics and biomechanics

Abstract

BackgroundThe optimal method for the reduction and fixation of posterior malleolar fracture PMF remains inconclusive. Currently, both of the indirect and direct reduction techniques are widely used. We aimed to compare the reduction quality and clinical outcome of posterior malleolar fracture managed with the direct reduction technique through posterolateral approach or the indirect reduction technique using ligamentotaxis.

MethodsPatients with a PMF involving over 25% of the articular surface were recruited and assigned to the direct reduction DR group or the indirect reduction IR group. Following reduction and fixation of the fracture, the quality of fracture reduction was evaluated in post-operative CT images. Clinical and radiological follow-ups were performed at 6 weeks, 3 months, 6 months, 12 months, and then at 6 month-intervals postoperatively. Functional outcome AOFAS score, ankle range of motion, and Visual Analog Scale VAS were evaluated at the last follow-up. Statistical differences were compared between the DR and IR groups considering the patient demographics, quality of fracture reduction, AOFAS score, and VAS.

ResultsTotally 116 patients were included, wherein 64 cases were assigned to the DR group and 52 cases were assigned to the IR group. The quality of fracture reduction was significant higher in the DR group P = 0.038. In the patients who completed a minimum of 12 months’ follow-up, a median AOFAS score of 87 was recorded in the DR group, which was significantly higher than that recorded in the IR group a median score of 80. The ankle range of motion was slightly better in the DR group, with the mean dorsiflexion restriction recorded to be 5.2° and 6.1° in the DR and IR group respectively P = 0.331. Similar VAS score was observed in the two groups P = 0.419.

ConclusionsThe direct reduction technique through a posterolateral approach provide better quality of fracture reduction and functional outcome in the management of PMF over 25% of articular surface, as compared with the indirect reduction technique using ligamentotaxis.

Trial registrationNCT02801474 retrospectively registered, June 2016, ClinicalTrails.gov.

KeywordsPosterior malleolar fracture Posterolateral approach Buttress plate Ligamentotaxis AbbreviationsAOFASAmerican Orthopaedic Foot and Ankle Society

APAnteroposterior

CTComputed tomography

DRDirect reduction

IRIndirect reduction

LMWHLow-molecular-weight heparins

ORIFOpen reduction and internal fixation

PITLPosteroinferior tibiofibular ligament

PMFPosterior malleolar fracture

ROMRange of motion

VASVisual Analog Scale

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Autor: Hong-fei Shi - Jin Xiong - Yi-xin Chen - Jun-fei Wang - Xu-Sheng Qiu - Jie Huang - Xue-yang Gui - Si-yuan Wen - Yin-he Wa

Fuente: https://link.springer.com/







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