. The science and practice of dental surgery. G. Bennett.) easily be moved backwards to allow the caninesto erupt into normal alicnment, and the re-mainder of the space gained will be closednaturally by forward movement of the molars. a well-formed lower deciduous arch and theinter-digitation of cusps may be enough toprevent this, and it is probable that in mostinstances such is the case. 92 Second Deciduous Molars.—The prematureloss of tlie second deciduous molars is a frequentcause of misplacement of the permanent teeth;the loss of upper and lower on one side beforethe second premolars are r
. The science and practice of dental surgery. G. Bennett.) easily be moved backwards to allow the caninesto erupt into normal alicnment, and the re-mainder of the space gained will be closednaturally by forward movement of the molars. a well-formed lower deciduous arch and theinter-digitation of cusps may be enough toprevent this, and it is probable that in mostinstances such is the case. 92 Second Deciduous Molars.—The prematureloss of tlie second deciduous molars is a frequentcause of misplacement of the permanent teeth;the loss of upper and lower on one side beforethe second premolars are ready to erupt removes. Fig. 143.—Forward jiim\ f lirsl upper per-manent molar duo to preniatiiro loss of seconddeciduous molar; early treatment. Lower figureshows results of treatment. (G. Northcrofx :Trans. ; Dental Record.) every obstacle to a for\\ard movement of thefirst permanent molars. It should not beimagined that there is in these teeth any in-herent power of translation ; they simply movein the direction in which they are pushed, orin which resistance is least or absent. Aboutthis period the growth of bone around theerupting or recently erupted first permanentmolars and about the angle of the mandible andposterior border of the maxilla is very consider-able. It is probable that the developing secondpermanent molars still enclosed in their cryptsafford a stimulus to this backward growth ofboth jaws. The jjurpose of this growth isclearly to afford room for these first and secondmolars, and it would seem that a deposit ofbone around teeth ^^ould not produce any forcelikely to propel
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
