[A classification proposal for compression-flexion articular fractures of the distal extremity of the radius. A radiographic study of 40 cases]. / Proposition de classification des fractures articulaires de l'extrémité inférieure du radius en compression-flexion. Etude radiographique de 40 cas.

40 articular fractures of the distal radius with palmar displacement, have been analyzed with Roentnograms. An original classification is proposed for a better initial evaluation of detailed articular damages and displacement. 4 main different types of fracture are described considering for elementary fragments constituted with antero-medial margin, radial styloid and dorsal margin; type A: total anterior margin, type B: separated anterior margin, type C: antero-lateral margin, and type D: antero-medial margin. The two types I and II described by Cauchoix, Duparc and Postel concerning the integrity of the dorsal margin have been incorporated. The quantity of radial gene fractured is determined on lateral view: < 1/2, > or = 1/2, and total. Finally the displacement is typed: anterior dislocation, or anterior translation. An original case of volar dislocated fracture with an intact radial styloid is reported. This classification could drive to specific orientations for treatment: even external fixation often associated with pinning, or alternative buttress plating.

[Changes in the pronosupination caused by resection of the radius head and prosthetic replacement. Anatomical study of 20 cases]. / Modifications de la pronosupination entraînées par la résection de la tête radiale et par son remplacement prothétique. Etude anatomique de 20 cas.

To improve the contribution of the radio ulnaris superior joint to the unrolling of pronation supination motion, we have set an anatomical and functional study with 20 cadaveric forearms. The first part concerned measures of the radial head diameters, which confirm its constant ovality, nevertheless unsufficient to create a "cam effect" likely to permit the passage of tuberositas radii over the ulna. The second part was supposed to evaluate the modifications of the pronation supination amplitude with fixed ulna, following radial head resection and prosthetic replacement. This study permitted to obtain relatively equivalent graphs in these circumstances; the prosthetic group realises the most important average range of motion, and graphics with the most approximating isocentrical arc of circles aspect. As a conclusion, no experimental argument seemed sufficient for us, to make a better choice between radial head resection and prosthetic replacement.