distal radius fracture 桡骨远端骨折

Fracture of Distal Radius,Zhi-jie Xi, MDTheDepartment of trauma and Hand Surgery TheFirstAffiliatedHospitalofuniversity of Guangxi Traditional Chinese Medicine,Outline,EpidemiologyAnatomy and biomechanicsRadiographical and arthroscopic evaluation Classification Criteria for acceptable reduction predictors of instabilityComplication AAOS-guidelines Debates,Epidemiology,Frequency Distal radial fractures account for 1/6 of all fractures seen in the EDRace No racial preferenceshave beenreported,AgePeaks at ages 5-14 years and at ages 60-69 years.Young patients intra-articular Elderly patients extra-articularGenderPostmenopausal women, female-to-male ratio 4:1 Adolescent boys and girls, the ratio is 3:1,Anatomy,volar radial tuberosity,lunate facet buttress,PQ = Pronator Quadratus Line, or PQ LineWS = Watershed Line,X = Volar Radial TuberosityVR = Volar Radial Ridge,Biomechanics,80% of the load is taken on the distal radius and 20% of the load is taken on the TFCC,DIC=dorsal intercarpal ligament DRC=dorsal radiocarpal ligament,Radiographic Assessment,X-ray CT MRI Arthroscopic evaluation,X-ray,0.9mm,10-15,正面切线位（11）,侧面切线位（21）,标准侧位,关节面切线位,CT,CT,MRI,Arthroscopy,Classification,Fracture classification systems are, in effect, tools. The purpose of the tool is to help the surgeon to choose an appropriate method of treatment for each and every fracture occurring in a particular anatomical region. The classification tool should not only suggest a method of treatment, it should also provide the surgeon with a reasonably precise estimation of the outcome of that treatment. -Albert H. Burstein, PhD, Deputy Editor for Research, Journal of Bone and Joint Surgery,Colles fracture is an extraarticular low energy fracture primarily sustained in the elderly, a fracture almost unique to caucasian women.,a classic Colles fracture,Sir Abraham,Colles Fracture (1814),Smiths fracture 1847,Robert William Smithconsidered this an injury of exceedingly rare occurrence, but its description heralded the age of vehicular trauma in 1847:The patient, in endeavouring to save himself from being run over by a car, fell with great violence upon the back of his hand . . .,Robert William Smith(1807-1873),woodcut from Smiths original description,The classic Bartons fracture describes the dorsal rim fracture subluxation, a shear-type injury. John Rhea Bartons addresses the difference between a true dislocation and this fracture: a dislocation typically has no crepitus, and once reduced tends to remain that way,John Rhea Barton(1794-1871),Bartons Fracture (1838),Die punch,die punch fracture, or lunate load impact fracture of the posteromedial corner of the radius, was more recently described byScheck,The absence of ligamentous attachments to the depressed fragment precludes reduction. In high energy trauma, one component of an unstable displaced fracture,the axial load through the lunate creates an impact fracture on the lunate facet,A case report,a1,a2,Chauffeurs fracture,The backfire, or Chauffeurs fracture, was extremely common in these days of voluminous traffic according toHarold C. Edwards, who described 42 fractures sustained from the impact of the downward swing of the automotive crank handle.,This is a high energy styloid fracture with carpal subluxation.,Salter-Harris Classification (1963),Pediatric Fracture Classification Thegrowth plateis the weakest structure in the developing ends of long bones, and therefore a common site for injuries, including the distal radius.,Frykman 1967,Fernandez 1996,Type I: bending,Type II: Shearing,Type III: Compression,Type IV: avulsion, including radiocarpal injuries,Type V: combined, high energy fractures,type A extra articular type B partial articular,AO (1987),type Ccomplete intra-articular,Medoff Anatomy Classification (1999),Five predictors of instability,a patient over 60an intra-articular fracture dorsal incomminution dorsal angulation of more than 20 an associated ulnar fracture,Treatment options,Closed reduction and immobilizationClosed reduction and Percutaneous pinningExternal fixationArthroscopically assisted reduction and Ex. Fixation of intraarticular fracture.ORIF with plate fixationBone grafting,There is no consensus on the management of theses fractures But definitions seem unclear in many papers.This might be the reason of discrepancy,Treatment of Type C3 Distal Radius Fracture,Guidelines for Reduction of Distal Radial Fractures,Radial shortening 15 degreesSagittal tilt on lateral projection between 15 degrees dorsal tilt and 20 degrees volar tiltIntraarticular step-off or gap 2 mm of radiocarpal jointArticular incongruity 3mm, dorsal tilt 10 degrees, or intra-articular displacement or step-off 2mm Rigid immobilization removable splints for displaced fractures treated non-operatively Patients do not need to begin early wrist motion Vitamin C for the prevention of disproportion-ate pain.,14 Inconclusive Results,To perform nerve decompression when nerve dysfunction persists after reductionCasting as definitive treatment for unstable fractures that are initially adequately reducedAny one specific operative method for fixation of distal radius fractures,Operative treatment for patients over age 55 with distal radius fracturesLocking plates in patients over the age of 55 who are treated operativelyImmobilization of the elbow in patients treated with cast immobilizationUsing of bone graft (autograft or allograft) or bone graft substitutes for the filling of a bone void as an adjunct to other operative treatmentsusing of supplemental bone grafts or substitutes when using locking plates,Over-distraction of the wrist when using an external fixatorFixation of ulnar styloid fractures associated with distal radius fracturesUsing external fixation alone for the Management of distal radius fractures where there is depressed lunate fossa or 4-part fracture (sagittal