Versuche zur Aetiologie und Prophylaxe der Zahncaries

Versuche zur Aetiologie und Prophylaxe der Zahncaries

of Foreign Bodies in the Region of the Neck and the Facial Bones and Their Localization by Means of the Boloscope. H. Eickhoff. Pratt. oto-rhino-lar?-...

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of Foreign Bodies in the Region of the Neck and the Facial Bones and Their Localization by Means of the Boloscope. H. Eickhoff. Pratt. oto-rhino-lar?-rrg. 11:

Extraction

49, 1949. The author states that the otolaryngologist is particularly well eciuippell Lo IVI~O\I! with th(a :I natonly of the head anal uwk foreign bodies from these regions, being familiar Often the usu:ll and having at his disposal the newssary instruments an
ORAL PATHOLOGY Versuche zur Aetiologie

und Prophylaxe

der Zahncaries.

J. M&e.

Ztschr.

f. Stoma1 ol. 46:

1, 1949. Dental caries, brought forth in an overwhelming measure 119 civilization, has bewme a menace to manhood. While civilized nations report :I pwct=nt:Lgc~ of 90 for rariw occurrcnw. show only 14 ptlr writ ill Eskimos of the east coast, of Greenland, untouchc4 1)~ c*irilization, 011 the wrll colonizctl wwt coast of Grtcnland, how~vcr. adults and 9 per cent in children. . Similar caries incidence rises to around 60 pw wut iu a~lults am1 c~hil~lrfw (IVannemacher) observations mere made by Acller ill Spain cluring the C’iril \V:lr, lop Jones and Larsen in Hawaii, Oettli in mountainous regions of Switzt~rlan~l. Kit.h. some modifications, Xlillcr ‘s caries t.heor!is stilt the only valill ,,ne, i.c., the. Hwt~nttw~ results. ‘I’lic t’ormw wwc user1 in a concentrat.ion 0C 2 p*‘t per cent in 20 c.c. of ordinary twuillou. cent because of the growth-inhibiting f:%(8tor of lrighw con~wnf l,atious. After establishing a lewl 1’11. each trst iulw was inocwlati~c{ with two loops of saliva 1.‘~ r:wh f wt. inllividual thrw twt, tubes wew plepareti ; and 1 loop of tooth surface film. \Vithin short intervals, the tubes with added each material was tested on 20 persons. Lakmus liquid were observed in order t,o tteterrnine the esaet time of acid reaction. Within intervals of six, twelve, and twenty-four hours, ihr esact pH was measured with the ionometer.

Untersuchungen Sehweiz.

ilber die biologische Remineralisation f. Zahnh. 59: 189> 1949.

kariiiser

ZLhne.

El. Eggers Lura.

Monatschr.

Within a period of ten years, t,hc author observed more t,han one hundred lift?; cases of hardened caries (caries ins&ens). Analysis confirmed that different, factors are responsible for the biologic healing of carions lesions: (1) a change of diet from refined, mixed foods, low in phosphorus Iaontcrrt, to a diet rich in phosphorus; (2) a primitive standard of living with much physiwl exercise, gowl tissue ventilation; (3;) 1~rwenc.e of phosphatase in teeth and saliva; i,li a high level of phosphatase esters in blood and saliva; (5) increased activity of oxidizing c*uzymes in blood and saliva. I<.. 11.. H.

Schmelzbiischel Zahnh.

und Prismenquerstreifung.

C. Leimgruber.

Rchweiz.

Jflonatschr.

f.

59: 242, 1949.

The author

submits

an analysis

of the enamel

structure

a.nd function

and concludes:

f L1. Clustered enamel is not a pathological formation, but is, on the contrary, an irn portant element in the architecture of the cnamcl. It helps to compensate for the volume increase of the enamel rods towards the surface and stands for the maintenance of the physicomechanical qualities of the enamel. “2. The transversal shivcs in the enamel rod derive from its volume increase, the periodical apposition of crystalline* cells to the prismatic body. entirely

i.c., from

“ 3. The architecture of the isolated enamel rod as well as of the whole enamel depends upon the submicroscopic constitution of its organic and inorganic components. ”

Die Innervation

cles Dentinbestandes.

L. Illy&.

Ztsehr.

f. Stomatol.

46: 101, 1949.

The sensitiveness of the dentine is up to the present date the subject of :L vast COILIn 1935 Herkelbach van drr Rprenkcl PUC troversy as to its conduction of pain impulses. reeded in proving the presence of nerve fibers in the dentinous substance, of almost all prepared specimens stained with the silver method of Rielschowsky and Cajal de Castro. ‘1’11~ author himself used the Rodian-Holmes silver stain method to show nerw fibrrs not onl? in the dentine tubules, but also outside of them. A certain number of them run almost at, right angles to the axis of t.he dentine tubules. The sensory nerves of the dontine have their origin in the large and in the middle-sizcbd unipolar cells of the gasserian ganglion, the vegetative nerves to the greater part in the superior cervical ganglion, to the lesser part, from the multipolar cells of the third ramus of the gasserian ganglion. The best place to find the nerves is’the odontogenous zolle-they are not the iibrrs OF Tomes. Miinch, however, has been able to shorn them also in the border zone of enamel and dentine, and in the enamel border zone. R. EI. B.