. Medical and surgical therapy. e of Froment and Wehrlin. Semi-diagrammaticdrawing. The position of the dorsal spring on the forearm hasbeen slightly lowered for it to be visible in this position of the handand give a view of the mechanism as a whole. devised the following appliance, which fulfils itspurpose well and is simple in construction. It consists of a leather cuff round the-wrist and of a ring worn round thethumb. The ring isconnected with the cuffby two springs, one ofwhich is inserted onthe outer border of themetacarpo-phalangealjoint of the thumb, andis directed towards thepisiform
. Medical and surgical therapy. e of Froment and Wehrlin. Semi-diagrammaticdrawing. The position of the dorsal spring on the forearm hasbeen slightly lowered for it to be visible in this position of the handand give a view of the mechanism as a whole. devised the following appliance, which fulfils itspurpose well and is simple in construction. It consists of a leather cuff round the-wrist and of a ring worn round thethumb. The ring isconnected with the cuffby two springs, one ofwhich is inserted onthe outer border of themetacarpo-phalangealjoint of the thumb, andis directed towards thepisiform bone, beingattached to the cuff atthe inner border of thewrist. This spring isintended to replace theparalysed opposingmuscle, and should bewell on the second spring is attached to the ring on the dorsalaspect of the metacarpo-phalangeal joint and to thecuff on the dorsal aspect of the wrist in the neighbour-hood of the posterior border of the radius. This spring ^ Revue Neurologique, November-December 1915, p. Fig. 49.—A new type of prostheticappliance for paralysis of themedian. (J. Froment.) ORTHOPEDIC APPLIANCES 345 plays the part of antagonist, and should therefore notbe much on the stretch (fig. 48). Froment ^ has modified this appliance in such amanner that the springs, instead of being attached tothe base of the first phalanx of the thumb, are insertedinto its upper extremity (fig. 49). This arrangement allows extension of the lastphalanx of the thumb, and thereby effects a moreperfect and efficacious opposition to the fingers. Appliances for Ulnar Paralysis An appliance for ulnar paralysis has been inventedby Cuneo and Holland with the object of preventingor correcting vicious attitudes and secondary de-formities, which are often the cause of the poor resultsof operations for compression or division of nerves. I am able to state, says Cuneo, that the use ofcorrective appliances for these deformities not onlyobviate additional operations, but also co
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