. The Dental cosmos. tory causes. It is improbable that the specimen isa freak of nature, inasmuch as it ob-viously bears marked traces of an inflam-matory affection. The conclusion to which one arrives,therefore, is that it is a case of absorp-tion of the apices of the roots of thetooth, accompanied by an undue reactionof living pulp tissue still remaining inthe radicular canals, which has resultedin the retention, to the last, of the den-tin immediately ensheathing that livingtissue. VOL. LVI. 76 1058 THE DENTAL COSMOS. THE TECHNIQUE AND APPLICATION OF A NEW METHOD OFMAKING REMOVABLE CROWNS.
. The Dental cosmos. tory causes. It is improbable that the specimen isa freak of nature, inasmuch as it ob-viously bears marked traces of an inflam-matory affection. The conclusion to which one arrives,therefore, is that it is a case of absorp-tion of the apices of the roots of thetooth, accompanied by an undue reactionof living pulp tissue still remaining inthe radicular canals, which has resultedin the retention, to the last, of the den-tin immediately ensheathing that livingtissue. VOL. LVI. 76 1058 THE DENTAL COSMOS. THE TECHNIQUE AND APPLICATION OF A NEW METHOD OFMAKING REMOVABLE CROWNS. By U. E. HEDDY, , St. Paul, Minn. THE use of removable bridges in ex-tensive cases of restoration has in-creased rapidly, as experience hasproved. A great many failures of sta-tionary bridges of the more extensivetypes have given much food for thought,and through these failures we have beenable to devise new and more scientificmethods of placing large and difficultcrown and bridge restorations. Fig. 1. Fig. In this paper it is my purpose todescribe as briefly as possible the con-struction of a new, efficient, and simpli-fied method of making a removablecrown. It can be applied to the so-called Richmond crown in either the an-terior or the posterior region of thebridge, without interfering with theanatomical lines of the tooth or crown. DETAILS OF CONSTRUCTION. The principle employed in this attach-ment has long been used in many formsof mechanical appliances. Years of ex-perience have proved it to be simple ofconstruction, yet highly efficient in util- ity. Its application and use in bridgework in a modified form will be explainedin detail. Fig. 1 shows in outline how a finishedcanine or central incisor appears fromthe mesial or distal aspect. Fig. 4 rep-resents the completed molar, the set-screw c being screwed through the buccalsurface of the crown so that its headis always flush with the surface of the Fig. 3. Fig. 4.
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
