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THE DENTAL COSMOS

A MONTHLY RECORD OF DENTAL SCIENCE.
Devoted to the Interests of the Profession.

EDWARD C. KIRK, D.D.S., Sc.D., LL.D., Editor.

L. PIERCE ANTHONY, D.D.S., Associate Editor.

PUBLISHED BY THE S. S. WHITE DENTAL MFG. CO., PHILADELPHIA, PA.

SUBSCRIPTION PRICE, including postage, $1.00 a year to all parts of the United States, Hawaiian Islands, the Philippines, Guam, Porto Rico, Virgin Islands, Cuba, and Mexico. Canada, $1.40. To other foreign countries, $1.75 a year.

Original contributions, society reports, and other correspondence intended for publication should be addressed to the EDITOR, Lock Box 1615, Philadelphia, Pa.

Subscriptions and communications relating to advertisements should be addressed to the BUSINESS MANAGER of the DENTAL COSMOs, Lock Box 1615, Philadelphia, Pa.

PHILADELPHIA, AUGUST 1918.

EDITORIAL DEPARTMENT

The Status Praesens.

WE publish in this issue at page 733 the text of the Act of Congress reorganizing the Navy Dental Corps, reconstituting its grades with their respective pay and allowances, and establishing its status with respect to the Medical Corps of the Navy. With slight amendment the present law is the enactment of the bill which was introduced in the Senate by Senator Tillman and in the House by Representative Dyer. Its outstanding feature is its official recognition of the principle of equality of status within the respective grades of dental and medical service, the same principle which characterized the Act of Congress of October 6, 1917, with respect to army dental service. The dental profession is again to be congratulated upon the achievement of this epochmaking step in the history of its progress-epoch-making in the

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sense that our national Government has set the seal of its official approval on the principle that dentistry is within its sphere entitled to the same recognition that it accords to all other departments of the science and art of healing. As we noted in our issue for April of this year in connection with the enactment of the present navy dental law, the Government recognition thus finally attained, is the outcome of upward of sixty years of more or less continuous effort upon the part of the dental profession to secure a proper understanding and adequate recognition of its inherent right to a place commensurate with its importance among the specialties of the healing art. The principle involved might have been established earlier had this legislative effort not had its course beset from time to time with the ambitious interference of those who held their personal interests as paramount to the professional welfare. More is yet to be accomplished before the status of the dental surgeon, both in the army and the navy, and the full efficiency of their service to the defensive forces of the nation, can be practically realized.

The present law, while it equalizes the status of dental surgeons and surgeons within a defined classification, limits the grades assigned to the dental surgeon and retains dentistry as a department under medical control. The future legislative program should aim at establishing additional grades in the dental corps to equalize it with the medical and other staff corps, and especially at the increase in the ratio of dental officers to such an extent that dental treatment will be universal and complete for the personnel of the Navy and Marine Corps; and ultimate separation of the dental corps in both army and navy from direct jurisdiction by the medical corps. These are objectives to be achieved in the future as growth and maturity in dentistry and in its service to the military arm justify their attainment. Recognition is sure to follow as the justification of service honestly and adequately rendered; what we have already gained is evidence of the truth of that assertion.

The exigencies created by the present war conditions have created the golden opportunity for dentistry to demonstrate the value of its service, and to its everlasting credit be it said, dentistry is responding promptly, loyally, and efficiently. Despite the wholly inadequate allotment of dental surgeons to the army and

navy personnel and the corresponding limitations to a complete dental treatment of those called to the nation's defense, the Army and Navy Dental Surgeons corps have rendered a splendid service and one of inestimable value and importance not only in relieving the many disabilities arising from defective teeth and mouth conditions; but what is more important though not by any means so obvious, the Dental Surgeons Corps has done its full share in maintaining the high standard of physical welfare of our troops, by eliminating, in so far as it has been physically possible to do so, infected mouth conditions which are the source of a long list of bodily ills.

The insufficiency of the present ratio of dental surgeons allotted to the army and navy personnel is self-evident. Recommendation by the dental committee of the Council of National Defense for a larger ratio of dental surgeons was made soon after the United States entered the war, and that the need for a larger corps is a real one in order that complete dental care may be available for the whole army and navy is evidenced by the emphasis placed upon the need of a larger dental corps by Representative Dyer in his argument in favor of the bill recently passed reorganizing the Navy Dental Corps. The most striking and practical evidence of the need for more thorough dental treatment for the army and navy personnel, and incidentally an equally striking example of the loyalty and enthusiastic support which the dental profession has been and is contributing to the winning of the war, is the magnificent and unselfish work being carried on by the Preparedness League of American Dentists. Through the intuition, personal enthusiasm, and devotion of Dr. J. W. Beach of Buffalo, the great possibilities of the service which civilian dentists could render in the preparation of recruits for military duty were clearly foreseen, and an organization with that object in view was started, at first in a modest way, in the early days of the war. A general appeal for volunteers followed, and so enthusiastic was the response that the largest organization in the history of American dentistry sprang into existence in a few brief months. Today the more or less incomplete returns show a record of upward of a half million dental operations performed by members of the League gratuitously for recruits entering the service. And the work is still going on in an increasing ratio.

Dentistry has in times past been subjected to criticism, justly or unjustly as the case may be, for its lack of willingness to render a public professional service without adequate compensation. Whatever may have been the case in the past, the practical evidence of the patriotic altruism of dentistry in the present world conflict is an indisputable refutation of that type of criticism now and for the future. The spirit in which the service is rendered is equally beyond criticism, for it is given not in the hope of reward in any material sense, but as the recognition of an opportunity to demonstrate the importance and value of our ministrations in conserving the health of those engaged in the national defense, and equally its importance to the health of the nation itself.

The events of our era are making history at a rapid rate. At no time in the past has dentistry developed so rapidly or been accorded in such large degree distinct recognition as one of the essentials of public health. Opportunity has knocked at her door and found her waiting; and, facing the future with a reasonable conservatism but with an abiding faith in the possibilities of her humanitarian service, dentistry is confidently approaching the fulfilment of the prophecy of Mayo by preparing to "take the next great step in preventive medicine"-toward the consummation of which all of her energies are now directed.

PERISCOPE

Spacing Between Natural and Artificial Teeth. When spaces between teeth are desirable, let the spaces be between the artificial teeth rather than between artificial and nat

ural ones. A group of porcelain teeth set closely together and separated by a space from an adjoining natural one would be apt to exaggerate and draw attention to those small differences in appearance between natural tissues and substitutes, differences which are more or less unavoidable. And it is better to have contiguous natural and artificial

teeth arranged in correct approximal contact for two additional reasons, one being directly functional in protecting the gum and preventing the impacting of food, and the other being indirectly functional, inasmuch as the steadiness and retention of a denture is considerably increased by exact approximal contact between natural teeth and substitutes, which contact should be carefully preserved when adjusting and fitting the finished case in the mouth.-D. MACKINTOSH SHAW, Dental Record.

Setting Crowns and Bridges.-Evans' gutta-percha is one of the most valuable materials that we have in our office, and I have found that comparatively few dentists have ever used it. With it it is possible to set crowns and bridges as firmly as with cement, and yet they can be removed with ease.— O. D. DAVIS, Dental Review.

A Good Separating Medium for Plaster Impressions. Having tried many of these, I have found none so quick and satisfactory as a solution of paraffin wax in petrol. It is clean to handle, always.ready, and the impression can be painted over and cast within a few minutes after being taken.-H. J. MORRIS, Ash's Journal.

To Sterilize Dentin.-Before inserting a filling or cement base in a tooth in which the pulp is alive, evaporate a 15 per cent. solution of thymol in alcohol in the cavity. The thymol will penetrate the tubuli and sterilize the dentin. This will avoid irritation of the pulp, which may cause secondary dentin, pulp nodules, or even death to the pulp.-A. DE VRIES, Dental Review.

To Refit a Rubber Plate Without Vulcanizing. Smear the plate with plaster, place in the mouth, and when hard remove. Pour a model. Remove the plate and also its plaster covering. Having had the shot of a Parker shot-swager in boiling water, or preferably glycerin, place the plate upon the model and embed in the swager. Do not hammer, but place a heavy weight upon the piston. Remove when cold.-L. E. CUSTER, Dental Summary.

Sensitive Dentin.-I never expose freshly cut dentin to the fluids of the mouth when I can help it, and whether I do or do not, I treat it to a touch of oil of cloves. Treating the cavity with alcohol followed by oil of cloves warmed with a puff of hot air from your chip-blower, and the cavity stopped with gutta-percha until the patient returns, will prevent the sensitiveness sometimes plained of after setting an inlay. Not only that, but pulps are not so likely to die.— HOMER ALMON, Dental Review.

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Root-end Encapsulation.—When we come to the question of root encapsulation, there is where Dr. Rhein and I part company, because I do not believe in it. I do not believe in it because it is inconceivable to me, in the first place, that in any considerable percentage of cases a complete encapsulation of the denuded root-end with gutta-percha is

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possible, and secondly, I do not believe that the gutta-percha is any improvement over the root-end so far as healing is concerned.— ARTHUR D. BLACK, Dental Review.

To Prevent Broaches from Falling into the Throat.-If one is using a root-canal reamer in the fingers and working in the canals of a tooth upon which it is difficult (or impossible) to place the rubber dam and holder, use a sheet of Japanese bibulous paper folded between the teeth and tongue and allowed to extend toward the throat, and it answers the purpose of a rubber dam nicely; when wet, use another.-M. J. LINDERHOLM, Farmington, Iowa.

Spatulation of Silicate Cement.-Spatulation beyond the point of thorough and homogeneous incorporation of the powder and liquid is not necessary, though contrary instructions have been sent out with one of the silicate cements. It is desirable to put a larger portion of powder into the liquid at first, rather than to begin with small portions and increase. The first portion of powder put into the liquid should be as much as can be immediately and quickly incorporated with it, and successive portions smaller.-EDMUND NOYES, Dental Review.

To Avoid Air-bubbles in Plaster Casts. -After coating the impression with separating medium apply a moderately thin mix of plaster to the entire surface of the impression with a 4-inch oval paint-brush (not camel's hair). When coated, immediately immerse the brush in a glass of water, and finish pouring the cast in the usual manner. This avoids jarring the impression with probably fracture or distortion. Allow the brush to remain in water. When necessary to use it again the plaster will shake or jar out readily, and the brush is as clean as when new.-LESTER N. ROUBERT, Dental Review.

Finishing Dentures.-Many mechanics still spend much time and labor with files It can, howand scrapers over this work. ever, be greatly reduced. To begin with, the use of a piece of thin soft metal burnished over the wax will give a good surface in the most inaccessible part of the palate. Instead of filing the edges of the newly vulcanized plate, they are heated in the gas, and with a sharp knife can be pared down as rapidly as if they were cheese, and that without the slightest fear of warping them, because the heat is localized, vulcanite being a very bad conductor. The edges and surfaces can be

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