C H A P. II.
Of the Luxation of the lower-Jaw.
The Jaw may be luxated either on both sides, or only on one. When the Dislocation happens on both sides, it hangs over the Sternum or Breast-Bone, and the Spittle runs abundantly out of the Mouth: To reduce it, the Patient must sit down, and his Head is to be supported by a Servant; then the Operator or Surgeon having wrapt up his two Thumbs, puts 'em into the Mouth upon the Molar Teeth, his other Fingers lying under the Jaw, which is to be drawn down by raising it up, having before set two small Wooden Wedges upon the two Molar Teeth on both sides of the Jaw, lest the Surgeon's Fingers shou'd be hurt, as the Bone is returning to its place.
If the Luxation be forward, a Band or Strap is to be put under the Chin, an Assistant having his Knees upon the Patient's Shoulders, where he is to draw the Strap upward, to facilitate the Extension; which the Surgeon makes with his Hands, at the same time thrusting the Bone back again into its place.
When the Jaw is luxated only on one side, the Chin stands a-cross, and the dislocated side is squash'd down, a small Cavity being perceiv'd in it, and a Rising on the other side; so that the Mouth cannot be shut close, but remains somewhat open, the lower Teeth appear farther out than the upper; and the Canine or Dog-Teeth lie under the Incisive. This Luxation is reduc'd by giving a blow with the Hand upon the luxated Bone, which is sufficient to cause it to re-enter its Natural Place.
The Dressing and Bandage
Are altogether the same with those us'd in the Fracture of the Bones of the lower Jaw.