The Dental cosmos . rst, decidedlyunscientific, but that has proved notably Bsuccessful in many difficult cases, is to \give the tooth first a start upward andbackward, by closing the beaks of acow-horn forceps together betweenthe second and third molars, as in theillustration. Such a starting force should, of course,be cautiously though firmly applied. The ,lifting or pulling force, as in the ordinaryuse of extracting forceps, should be avoided. Simply to close the forcepsbetween the second and third molars, while the former is reinforced withthe pressure of the thumb, is sufficient, ordinari
The Dental cosmos . rst, decidedlyunscientific, but that has proved notably Bsuccessful in many difficult cases, is to \give the tooth first a start upward andbackward, by closing the beaks of acow-horn forceps together betweenthe second and third molars, as in theillustration. Such a starting force should, of course,be cautiously though firmly applied. The ,lifting or pulling force, as in the ordinaryuse of extracting forceps, should be avoided. Simply to close the forcepsbetween the second and third molars, while the former is reinforced withthe pressure of the thumb, is sufficient, ordinarily, to start the third molarwell from its socket, after which it can be easily taken away with any suitableforceps. As the tapered beaks (F) of the cow-horn forceps forced between the teethact as wedges, the force exerted may be very great, hence the necessity forcaution. Injury to the second molar is the accident that would generally bemost feared from this method, but a study of the relative length, size, and cur-. THE DENTAL COSMOS. vature of the roots of the teeth involved, and of the direction of the force applied,as illustrated by the cut, discovers a good margin of safety. The force appliedto the third molar is upward and backward along the line C, B, nearly onthe curvature (A, A) of its axis and in the direction of its least force applied to the second molar is upward and forward, as indicatedby C, D, almost across its axis, and not very far out of the line of its greatestresistance. Add to this the difference in size, length, and strength of theroots of the two teeth, and the bracing of the second molar by the teethanterior to it, which, in case of a gap, can be made good by a mass of gutta-percha applied soft and permitted to harden, and it will be seen that thereis at most very little danger of starting the wrong tooth. There is always in extraction of teeth the possibility of injuring the bone,and there is no better way to avoid that with any meth
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