SECT. CXII.—ON THE LOWER JAW.
Beginning then again from the upper parts we shall treat of the lower jaw. For the upper being immoveable does not admit of dislocation; but the lower does not indeed readily admit of complete luxation, owing to its heads being firmly fixed to the upper jaw, but it often undergoes subluxation, for the muscles which are fixed to it being relaxed by the constant exercise of mastication and speaking, the jaw is readily slackened from the most common causes. For the term used by Hippocrates signifies slackened. In these cases the part returns to its natural place without trouble. With regard to the complete dislocation of the lower jaw, it will be sufficient to deliver Hippocrates’s account, being, at the same time, brief, complete and clear. He says thus: “The jaw seldom falls out of the joint, but it is often slackened in yawning, as many other irregular actions of muscles and tendons do this. When it falls out of the joint it is marked principally by these symptoms; the lower jaw projects forwards, and is inclined in an opposite direction to the luxation; and the coronoid process of the bone swells out near the upper jaw-bone, and it is with difficulty that they shut their jaws. In these cases the suitable mode of reduction is apparent. For somebody must hold the patient’s head, another grasps the lower jaw internally and externally with his fingers at the chin, while the patient yawns as much as he can conveniently; and we must first move the jaw with the hand hither and thither for a certain time, and order the man to relax the jaw and separate it; and then we must attend to perform three evolutions at the same time, we must move the jaw from its distorted shape to its natural; push the jaw backwards; and then shut the jaws close, and prevent yawning. This is the mode of reduction, and it cannot be performed by any other processes. Very little treatment will suffice afterwards. Having applied a waxed compress, it is to be secured with a loose bandage. But the surest process is to lay the man upon his back, and supporting his head upon well-stuffed pillows, that they may not yield, to get some person to hold the head of the patient. And if both ends of the jaw be dislocated, the treatment is the same, only the mouth cannot be so well shut, for then the jaw is more prominent, but less distorted from the teeth of the upper and lower jaws corresponding exactly together. Reduction is to be immediately performed, and the mode of it has been already described. If it cannot be restored, there may be danger of the life from continued fevers, torpor, and carus. For these muscles being altered and stretched in a preternatural manner produce carus. They frequently have evacuations by the belly, which are purely bilious, and small in quantity; and if they vomit, it is pure bile. These, for the most part, die on the tenth day.” This mode of reduction we have often practised, having first used fomentations of warm water and oil, by a sponge along the dislocated jaw, more especially when there is any difficulty in restoring it to its position. Wherefore, having placed the man upon the ground, we stand behind and operate in the manner described by Hippocrates.
Commentary. The account here given of Hippocrates’s method of reduction is taken from his work, ‘De Articulis,’ (31.) When a few of his technical terms are explained in the commentary of Galen, the description is sufficiently distinct, and is upon the whole a very correct account of the symptoms and treatment of this accident. The prominence of the coronoid bone is well described by Hippocrates. Galen remarks that the end of the jaw-bone slips under the zygomatic arch. It has been a matter of dispute what Hippocrates means by slackening, or incomplete luxations of the jaw. It is worthy of remark that such an accident is described by Sir Astley Cooper. (See further Littré’s Hippocrates, t. iv, 29.)
Galen’s description of the method of reduction is given in the Collection of Nicetas. (Chirurg. Vet. ed. Cocchius.) It is substantially the same as that of Hippocrates.
A mode of reducing the dislocation by means of a machine is described by Oribasius, in his work De Machinamentis, 30.
The account which Celsus gives of this accident is upon the whole very accurate, and corresponds very well with modern descriptions. If dislocated only at one end, the chin inclines to the opposite side, and the teeth of the upper and lower jaws do not correspond. If at both ends, the whole chin projects outwards, the lower teeth are more prominent, and the muscles appear stretched. The patient being properly seated, and his head held by an assistant, the surgeon having wrapped his thumbs with linen cloths, is to put them into the patient’s mouth, while the fingers are applied externally. The jaw being firmly grasped, the chin is to be shaken, and then, at one and the same instant, the head is to be seized, the chin moved, the jaw forced into its place, and the mouth shut. After reduction, if pain in the eyes and neck has been brought on by the accident, he recommends us to let blood from the arm. The patient is to live upon liquids, and avoid talking.
Albucasis follows Hippocrates in distinguishing dislocations of the lower jaw into partial and complete. In addition to the symptoms already detailed, he mentions a flow of saliva from the mouth, and an inability to speak. When the dislocation is partial or incomplete, he says, it soon returns of itself to its proper place. When the luxation is complete, he directs us to reduce it by introducing the thumbs into the mouth, and grasping the jaw in the manner described by Hippocrates. He states that when not reduced the accident often proves fatal by superinducing fevers and coma. Avicenna, in like manner, affirms, that if not reduced, it may bring on fatal consequences. His account is borrowed entirely from Hippocrates. Rhases and Haly Abbas give exactly the same description of the symptoms and mode of reducing as Albucasis.
Monteggia, Fabricius ab Aquapendente, Sir Astley Cooper, and Mr. Samuel Cooper (the author of the well-known Surgical Dictionary) affirm that there is no foundation for the prognostic of Hippocrates, that the accident will prove fatal if the dislocation be not speedily reduced. We can say, however, from our own personal knowledge, that such fatal consequences do occasionally occur. We once knew a poor woman who was very liable to dislocations of the lower jaw, which we reduced three or four different times. At last, owing to circumstances which it is unnecessary to explain, an interval of more than a day elapsed between the accident and the reduction. By this time she was become seriously indisposed, and died a few days afterwards with all the symptoms described by Hippocrates. We may mention also that Heister states that fatal consequences may result from the accident. (Chirurg. p. i, iii, 4.) The same thing is affirmed also by Brunus (Chirurg. Mag. i); by Theodoricus (ii, 43); and by Guido de Cauliaco (v, 2.)
That species of sub-luxation described by Hippocrates, is mentioned by Guy of Cauliac in the following terms: “Mandibula quandoque mollificatur.” (v, 2.)