Injuries and diseases of the jaws . on of a pathological dislocation which hedissected and presented to the Musee Dupuytren. Theaccompanying illustration (fig. 36), reduced from Malgaigne^sAtlas, is from the preparation in question. The coronoidprocess in this certainly touches the malar bone, and therelations of the inter-articular cartilage and external lateralligament are well seen. Ribes and Monteggia agree withMaisonneuve and Weber in believing that in most jaws thecoronoid process is not long enough to reach the malarbone; and the last-named author mentions that Roser wasunable to reduce
Injuries and diseases of the jaws . on of a pathological dislocation which hedissected and presented to the Musee Dupuytren. Theaccompanying illustration (fig. 36), reduced from Malgaigne^sAtlas, is from the preparation in question. The coronoidprocess in this certainly touches the malar bone, and therelations of the inter-articular cartilage and external lateralligament are well seen. Ribes and Monteggia agree withMaisonneuve and Weber in believing that in most jaws thecoronoid process is not long enough to reach the malarbone; and the last-named author mentions that Roser wasunable to reduce an old dislocation of eight weeks^ standing,even after cutting through both coronoid processes fromwithin the mouth by means of bone forceps. From experiments I have myself instituted, I believe theview of Maisonneuve and Weber to be correct—viz., thatthe coronoid process does not become fixed against themalar bone. In the macerated skull it is easy to dislocatethe condyle so far in front of the articular eminence as to Fig. cause the coronoid process to be hooked against the malarbone; but this is by no means easy on the subject, even 84 DISLOCATION OF THE JAW. when the parts are dissected, and can only be accomplishedby tearing the structures of the joint very , the position the jaw assumes when the condylesare so driven forward, is not that of the ordinary form ofdislocation, the jaws being too widely separated, and thechin drawn back instead of being advanced. Were thecoronoid processes fixed against the malar bones, it wouldbe impracticable to effect reduction by elevating the chin,as is frequently done ; and, moreover, the gradual improve-ment noticed in old-standing cases of dislocation would beimpossible. A preparation, illustrating the anatomy of dislocation,which was dissected for me by my friend Mr. Marcus Beck,accompanied this essay, and is now in the Museum of theCollege of Surgeons. From one side of it the drawing(fig. 37) was made. Sym
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