Transactions of the odontological society of Great Britain . of section of locking band, showing position of thelever and spring when the band is open, and in dotted lines when itis closed. of a tooth, when it is necessary either to insert orremove the plate, and will be found most usefulin the very class of cases in which an ordinaryband fails. While the spring effectually retainsthe band in contact with the constricted portionof the tooth, it readily allows it to be opened, andthus avoids the friction and resulting pain, thatso frequently accompany the use of tight bands. FOR THE RETENTION O
Transactions of the odontological society of Great Britain . of section of locking band, showing position of thelever and spring when the band is open, and in dotted lines when itis closed. of a tooth, when it is necessary either to insert orremove the plate, and will be found most usefulin the very class of cases in which an ordinaryband fails. While the spring effectually retainsthe band in contact with the constricted portionof the tooth, it readily allows it to be opened, andthus avoids the friction and resulting pain, thatso frequently accompany the use of tight bands. FOR THE RETENTION OF ARTIFICIAL DENTURES. 9 In some cases it is useful to employ a bandwhich can be opened, and will remain fixedin this position while the plate is being insertedor removed from the mouth; the band thenbeing closed, and remaining immovably fixeduntil it is intentionally opened again. In this case the band is soldered to thepiece of tube which forms the central portionof a brooch joint, the band being carried suffi-ciently beyond the tube to press on a small. Fig. 4. WcdgG-shaped space with base towards the gum, to which a smallplate may be adapted by the use of locking bands. flat spring, bent into the shape of a horse-shoe magnet. This causes the joint to openor close with a snap, the spring locking theband securely in either position. In order to prevent the ingress of rubberduring packing, or of food when in use, thejoint and spring are enclosed in a small goldbox—which measures only -^^ of an inch in itslargest diameter—which can be soldered to aplate or embedded in vulcanite. 10 ON SOME MECHANICAL DEVICES Cases sometimes present themselves in wliiclibut one or two teeth—say a second bicuspidand first molar—have been lost on one sideof the mouth only, the resulting space beingwedge-shaped, with the base towards the gum3from the tilting of the adjoining teeth. The
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectdentist, bookyear1868
