. The science and practice of dental surgery. Fig. Stin. cause difficulty in extraction. The difficultyappreciated is that of excessive resistance to theextractive force, the tooth refusing to budgewhen the force is applied in the ordinary wayand degree. Caution is imperative. The direc-. FiG. 900. tion of the force must be varied till that directionis found in which it promises to overcome theresistance, and the force must be carefullyincreased in proportion to the resistance en-countered. The tactus eruditus will succeed in

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19