The Dental cosmos . sockets through the force of oc-clusion and by means of an applianceworn in the upper arch. (Fig. 15.)The appliance was made with a palatalbase-wire anchored in the usual the anterior part of the appliance JACKSON. ORTHODONTIA. 351 back of the incisors was attached a semi-circular piece of plate metal, similar tothe one described in Fig. 8. It was ar-ranged to incline forward, and was sup-ported against the upward thrust of thelower incisors by two small loops ofspring wire, arranged to hook over thecusp of each of the canines. The ends ofthe wire extended below t
The Dental cosmos . sockets through the force of oc-clusion and by means of an applianceworn in the upper arch. (Fig. 15.)The appliance was made with a palatalbase-wire anchored in the usual the anterior part of the appliance JACKSON. ORTHODONTIA. 351 back of the incisors was attached a semi-circular piece of plate metal, similar tothe one described in Fig. 8. It was ar-ranged to incline forward, and was sup-ported against the upward thrust of thelower incisors by two small loops ofspring wire, arranged to hook over thecusp of each of the canines. The ends ofthe wire extended below the table towhich they were soldered. Underneath the table and resting nearthe gum were two ringer springs formoving the upper incisors outward. Theywere soldered to each side of the anchor-age portion of the appliance, and madeto extend forward in the direction of thelingual faces of the incisors to the oppo-site side of the arch. When the lower incisors were suffi-ciently depressed, the finger springs were Fig. bent forward slightly from time to time,in order to move the upper incisors out-ward (Fig. 16), after which the upperand lower arches were equalized to im-prove the occlusion. The same appli-ances were used for equalizing the this a wire was extended from theanchorage portion of the upper applianceon each side of the arch, passing overthe occlusal surface at the junction ofthe lateral incisor with the canine to thegum line, where it was soldered to a nar-row partial clasp resting in front of thecanine; at the same time a wire hookwas attached to the partial clasp forholding one end of a rubber equalizingband. The other end of the equalizingband was supported by a similar hook at-tached to the distal part of the apparatus on each side of the lower arch. When theapparatus is not well retained by thespring-clasp attachments, it is an ad-vantage to cement to the last lowermolar on each side of the arch a collarwith a small lug on the bucco-distalsurface, and a
Size: 1949px × 1282px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthor, bookcentury1900, bookdecade1900, booksubjectdentistry
