(a) Upper Central Incisors.—An irregularity of this tooth calling for removal is shown in [fig. 37].
The extraction is best carried out with an instrument similar to that shown in [fig. 38], the fine inner blade being applied on the palatal side and the broad blade on the labial. Extractive force should be applied principally in the outward direction, and if this is not sufficient, slight rotary movement should be tried. In cases where there is less room between the approximal teeth, the projecting tooth may be removed with a pair of straight forceps ([fig. 17]), the blades being applied to the mesial and distal aspects of the root. The blades should not be driven very far up, and the loosening of the tooth should be accomplished by slight rotary motion, in using which care should be taken to avoid loosening the approximal teeth.
Fig. 38.
(b) Upper Lateral Incisors lying internal to the arch, as shown in [fig. 39], can be removed with the forceps shown in [fig. 38], by placing the fine blade on the labial and the broad blade on the palatal side of the tooth. Extractive movement should be made inwards, followed by very slight outward movement; this failing, rotation should be tried, but as pointed out on a previous page, this form of movement is not so suitable for lateral incisors as for centrals.
Fig. 39.
(c) Upper Canines placed high in the arch, as shown in [fig. 40], may be extracted with a straight pair of forceps ([fig. 17]), the blades being placed on the mesial and labial aspects of the root. Extraction of such teeth is very difficult. Slight but firm rotation may first be tried; if this fails to loosen the tooth, slight lateral movement may be attempted, the force being applied towards and then away from the median line of the mouth.