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Characteristics of secondary arthrofibrosis after intra-articular distal radius fracture.
Archives of Orthopaedic and Trauma Surgery 2016 August
PURPOSE: The purpose of this study was to assess characteristics of radiocarpal arthrofibrosis after intra-articular distal radius fractures (DRF).
PATIENTS AND METHODS: In this study 20 patients who underwent wrist arthroscopy at the time of implant removal after volar plating for intra-articular DRF were included retrospectively. The direction of fibrous tissue formation (FTF) and its rigidity were investigated. The findings were correlated to the course of intraarticular fracture lines seen in the preoperative CT, patient age and AO fracture types.
RESULTS: In all patients FTF spanned the radiocarpal joint. Fibrous tissue formations extended from previous fracture gaps to the scapholunate interosseous ligament and/or capsule. Four basic types of FTF (Type 1-4) and two combination types (Type 1a, 2a) were found. Fibrotic fans with dorsal capsular attachment (Type 1, 30 %) and its combination with dorsal capsule obliteration (Type 1a, 40 %) were the most common findings. Mild rigidity was present in 3 (15 %), moderate in 7 (35 %), and severe rigidity in 10 cases (50 %). Fracture lines crossing the radius extensor compartments or interfacet ridge, cartilage defects and C3 fractures showed the highest risk to develop severely rigid fibrous tissue formations. In older patients and in more comminuted fractures the number of rigid fibrous tissue formations was higher.
CONCLUSIONS: Fracture severity correlates with the development of rigid intra-articular FTF. In case of rigid FTF with restricted wrist motion arthroscopic debridement may be considered at the time of hardware removal.
PATIENTS AND METHODS: In this study 20 patients who underwent wrist arthroscopy at the time of implant removal after volar plating for intra-articular DRF were included retrospectively. The direction of fibrous tissue formation (FTF) and its rigidity were investigated. The findings were correlated to the course of intraarticular fracture lines seen in the preoperative CT, patient age and AO fracture types.
RESULTS: In all patients FTF spanned the radiocarpal joint. Fibrous tissue formations extended from previous fracture gaps to the scapholunate interosseous ligament and/or capsule. Four basic types of FTF (Type 1-4) and two combination types (Type 1a, 2a) were found. Fibrotic fans with dorsal capsular attachment (Type 1, 30 %) and its combination with dorsal capsule obliteration (Type 1a, 40 %) were the most common findings. Mild rigidity was present in 3 (15 %), moderate in 7 (35 %), and severe rigidity in 10 cases (50 %). Fracture lines crossing the radius extensor compartments or interfacet ridge, cartilage defects and C3 fractures showed the highest risk to develop severely rigid fibrous tissue formations. In older patients and in more comminuted fractures the number of rigid fibrous tissue formations was higher.
CONCLUSIONS: Fracture severity correlates with the development of rigid intra-articular FTF. In case of rigid FTF with restricted wrist motion arthroscopic debridement may be considered at the time of hardware removal.
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