A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . attachment cannot be secured to a tooth, a hole can usually be bored for *The author, who was a student of Dr. Robinsons during the time of the above operation, was told that this wasthe common method of correcting the position of short teeth. From this it may be seen that direct intermaxillaryforce was employed in dentistry much earlier than has been supposed. CHAPTER LI. IMPACTIONS 369 a pin at a point where it will not ultimately be a defacement. In Chapter XVIII under Constr
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . attachment cannot be secured to a tooth, a hole can usually be bored for *The author, who was a student of Dr. Robinsons during the time of the above operation, was told that this wasthe common method of correcting the position of short teeth. From this it may be seen that direct intermaxillaryforce was employed in dentistry much earlier than has been supposed. CHAPTER LI. IMPACTIONS 369 a pin at a point where it will not ultimately be a defacement. In Chapter XVIII under Construction of Regulating Bands, is described the method of banding partially erupted cuspids. The Impaction of Second Bicuspids Fig. 275 shows casts and radiograms of a boy fourteen years of age. The pre-mature loss of the lovv-er second deciduous molars had permitted the adjoiningteeth to completely close the space for the second premolars, as shown by modelA. The accompanying radiogram shows the impacted premolars. The properappliances for opening and retaining the spaces and correcting the malocclusion Fig. were attached, and this caused the impacted teeth to erupt as seen in Model B. This case practically illustrates the common cause and results of impaction of this character. Impaction of Upper Cuspids Fig. 276 is from casts and radiograms of a girl fourteen > ears of age. In anexamination of cast A which represents the case when presented, there will befound no abnormal prominences of the gum surface to indicate the presence of thepermanent cuspids. It is important to note in this and other cases to be shown, the shadow distor-tion of the position of the impacted teeth which the ordinary radiogram is liableto produce. Here they have the appearance of lying imbedded in the process at aninclination of 45° as compared to the normal, and with the apical ends of the rootsqioite distally located. 370 PART VII. UNCLASSIFIED MALOCCLUSIONS In cast B, which shows the cuspids
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