Dental roentgen therapy

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ORAL

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PATHOLOGY

A Contribution to the Histo-Pathology of Pulp “Polypi, Hilde Frey. Brit. ID. J. 85: 325, 1048.

’ ’ Especially

of Temporary

Teeth.

Tile etiology is g:(~n~~r:tli~ The pulp polypus is a chronic pro~luctiw infanumttiol~. It is genrtxllqco\ned 11) :iwumed to be either meclmnical trauma or ml infective process. ~~~)ithcliurn which does not show any signs of irritation clue to mecllanical action : tlwrefc~l~~ The causatire agent is of wry ICI\\ tlw cause is more likely to be infection than traum:l. virulence judging from the presence of lymphovytcs, plxsma cells, and fibroblasts. l‘hc fXl.1 t Il:lt several polypi may occur in one month the writer explains bg the assumption I hat tllca 1 issues of certain individuals react mill1 hypertrophic production to tlifferent types of d:~mngt~. just :w keliod f ormation takes place in certain individuals only. In some sections the author fount1 the hyprrtro~dlic;l pulp to intrude into the sur

I<. H. ‘I‘.

Et tilfelle av stans i tannutviklingen etter hiiyvoltbestraaling (A Case of Arrested Dental ?;owk. ‘I’YIIII~. For. Till. Development After High-Voltage Radiation). 0. Betten. c 58:

216-218.

7048.

Rudimentary tooth formation ill the lower jaw ww observer1 in a boy X years ol(l. ‘1’11(, root form:ltion. and the nneruptetl 11w ~*ruptwl permanent teeth were loose due to arreded illvlars were very rudimentary, espec*ially on the right side. The condition was believed to hare been caused bp higIl-roltagc radiation treat mtwt / I.5 million volt, 6.8 mm. lead filter, 2,650 roentgcn units) which the boy received at the :~gv of 4 during ten days’ treatment for an osteosarcomx lov:~ted on the lower right :Lntc‘riot Iwrder of the mandible. R. Ii’. S:.

Dentinogenesis

imperfecta

52:

1918.

L’X-36

(Hereditary

Opalescent

Dentine).

J. J. Pindborg.

‘[‘:trltll. PA11.