Columbia University School of Dental and Oral Surgery - Dental Columbian Yearbook (New York, NY)

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C O D O S , i 9 i 8 imottsirattott in Jugulating Appltanr? By Victor Hugo Jackson (M.A., M.D., D.D.S., New York). HE new anchorage of appliances requires that a thin, broad collar with a buccal lug of triangu- lar shape, like a door latch located to rest near the gum at the center of the tooth, be cemented to the last erupted molar on ea ch side ofthe dental arch, and a similar collar with a buccal lug be cemented to each of the cuspids, or if the cuspid is absent, the collar be cemented to one of the other anterior teeth. Often lingual lugs are used for these purposes. (See Fig. i.) When the collars are cemented to the anchorage teeth, an impression of the arch is taken and accurate models are prepared, on which an appliance is made. The metal parts of an appliance are known as partial-clasp, spring-clasp, base-wire and springs. Of each of the last two, there are several forms. The metals employed are usually of German silver spring wire. Spring wire containing more than 20j3er cent, of nickel (known as silver nickel) is generally used, and when carefully drawn it is usually sufficiently springy. A partial-clasp of 18K. gold plate-metal No. 36 U. S. standard wire gauge, shaped with a contour- ing plier, is fitted to the lingual surface of each of the cuspids, bicuspids and molars of the model on each side of the arch. The foundation of an appliance is a base-wire usually of a rather large diameter. The size or gauge of the base-wire is chosen according to the age of the patient and density of the bone. A spring-wire No. 13 U. S. standard wire G. being used for a child of four years, No. 11 base-wire for a child of eight years, No. 10 for a child twelve years of age, or for an adult; for the adult occasionally No. 9 G. is employed. In any case where the anterior part of the dental arch requires lateral expansion and the distal part of the arch does not require lateral expansion, the body of the appliance is made by arranging a large base- wire to cross the distal part of the arch opposite the last molars following the palatine curve. The ends are bent forward to form arms, extending from the last molars to the cuspids, resting on the partial-clasps near the gum on the lingual side of the teeth, to which they are finally soldered. These ends of the base-wire are made less bulky by dressing them with a file, especially near the ends, or at locations that will not lessen their strength. Twcnty- ' J ' zvi

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SI)? IMnrnt? Mm CODOS, i 9 i 8 There ' s a man in the world who is never turned down Wherever he chances to stray; He gets the glad hand in the populous town, Or out where the farmers make hay. He ' s greeted with pleasure on deserts of sand, And deep in the aisles of the woods: Wherever he goes, there ' s a welcoming hand — he ' s The Man Who Delivers the Goods. The failures of life sit around and complain The gods haven ' t treated them white; They ' ve lost their umbrella whenever it rains, And they haven ' t their lanterns at night; Men tire of failures who fill with their sighs The air of their own neighborhoods; There ' s a man who is greeted with love-lighted eyes — he ' s The Man Who Delivers the Goods. » One fellow is lazy and watches the clock, And waits for the whistle to blow; One has a hammer with which he will knock, And one tells a story of woe. And one if requested to travel a mile Will measure the perches and rods; But one who does his stunt with a whistle and smile — he ' s The Man Who Delivers the Goods. One man is afraid he ' ll labor too hard, The world isn ' t yearning for such; And one man is ever alert — on his guard- Lest he put in a minute too much. One has a grouch on, a temper that ' s bad, And one is a creature of moods; So it ' s me for the joyous and rollicking lad — for The Man Who Delivers the Goods. — Anonymous Twenty-One

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CODOS, i 9 i 8 Fig. I Fig. 2 Twenty-Three