Injuries and diseases of the jaws . The mouth is open and the jaw fixed, with thelower teeth carried beyond those of the upper jaw, as seen SYMPTOMS OF DISLOCATION. 85 in fig. 38, from Fergusson. Speech and deglutition are muchinterfered with, since the lips cannot be approximated ; and,for the same reason, the saliva dribbles from the examining the neighbourhood of the temporo-maxillaryjoint, a distinct and unusual hollow will be seen immedi-ately in front of the ear, and the condyle may be both seenand felt in front of this. The coronoid process forms aprojection immediately behind
Injuries and diseases of the jaws . The mouth is open and the jaw fixed, with thelower teeth carried beyond those of the upper jaw, as seen SYMPTOMS OF DISLOCATION. 85 in fig. 38, from Fergusson. Speech and deglutition are muchinterfered with, since the lips cannot be approximated ; and,for the same reason, the saliva dribbles from the examining the neighbourhood of the temporo-maxillaryjoint, a distinct and unusual hollow will be seen immedi-ately in front of the ear, and the condyle may be both seenand felt in front of this. The coronoid process forms aprojection immediately behind and below the malar bone,and may be readily felt in its abnormal position from themouth. The masseter is firmly contracted and stronglyprominent. R. W. Smith, in his work on Fractures andDislocations,^^ has also specially called attention to a promi-nence immediately above the zygoma, which has not beenusually described, and which he believes is due to the condylepressing forward and stretching the posterior fibres of the Fig. temporal muscle, but which I believe to be caused by theirspasmodic contraction. The accompanying drawing (tig. 39), S6 DISLOCATION OF THE JAW. taken, by permissiou, from the work referred to, illustratesboth these points. In dislocation of one condyle only the signs are lessmanifest, and may possibly be overlooked or chin is usually directed towards the sound side insteadof towards the injured side, as is the case in fracture ofthe neck of the bone; the hollow in front of the ear isequally visible in this as in the double form of dislocation,and speech and deglutition are similarly to some degreeinterfered with. The obviousness of the direction of thechin to one side will depend in some degree upon theoriginal prominence of that feature in the individual, andtoo much stress must not be laid upon the symptom : thusHey, in his Practical Observations in Surgery (1814),remarks— One would expect, from a consideration of thestructure
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1872
