Investigacion Microscopica De Apices Radiculares Abiertos

Microscopic investigation of root apexes •
Yury Kuttler,* D.D.S., M.D., Mexico, D. F., Mexico
The necessity for an exact and complete
knowledge of the topographic and microscopic
anatomy of the dental apex has
been recognized. That these studies have
not been made has been acknowledged
by Orban,
1–4
Blayney,
5–8
Skillen,°
,
1°
Grove,
11–16
Ono"
and
others.
Anatomy, of course,is the foundation
of the art and science of healing. The
terminal part of the root canal and the
tissues which surround it are the center
of the most activity and the greatest concern
in the treatment and filling of
the root canal. The works of Preiswerk,"
Fischer,
19,
2
° Hess,
21 Barrett
22 and
Davis"
, 24
and
others
which
date
from
the end of the last century and from thebeginning of the present one, had as
their almost exclusive center of interest
the number of root canals and their
divisions.
Up to the present time the endodontist
has worked with extremely poor data.
The roentgenogram of the apex seldom
offers a clear view of the terminal part
of the canal; therefore, one is obliged to
use information not scientifically proved.
Much of the informationavailable was
obtained from a limited number of
studies, mostly macroscopic, of apexes
principally in transverse sections of the
root.
The prevailing idea of the topographic
and microscopic anatomy of the apex,
that is, the direction, form, diameter and
so forth of the terminal part of the canal,
544
the location of the foramen, its size and
the thickness of the cementum, is completelyerroneous. Blayney, Grove and
many other authors share this same opinion.
The extreme assertions about the
Presented at the extraordinary session of the Mexican
Society of Endodontia.
MePxriocfoe.ssor of postgraduates, National University of
theI. dOernbtainno, cBeamlientn.t aWl IjNun rcotoiot nc.a Jn.aAls.D s.hAo. u1l7d: 1b0e8 fi6ll eJdu ntoe 1930.
2. Orban, Balint. Problem of root canaltreatment.
J.A.D.A. 19:1384 Aug. 1932.
3. Orban, Balint. Oral histology and embryology,
ed. 3. St. Louis, C. V. Mosby Co., 1953.
4. Orban, Belint. Personal communication.
5. Blayney, J. R. Biologic aspect of root-canal therapy.
D. Items Interest 49:681 Sept. 1927.
6. Blayney, J. R. Present conception of vital reactions
Jw.Ahi.cDh.A o.c 1c6u:r8 w51ith Mina ya p1i9ca2l9 t.issues after pulpremoval.
7. Blayney, J. R. Problem of the pulpless tooth. J. D.
Res. 10:425 Aug. 1930.
8. Blayney, J. R. Progress of pulp canal therapy.
Proc. D. Centenary, 1940, p. 646.
9. Skillen, W. G. Report on formation of dentin and
Jcaenm. e19n2tu1m. relative to structure of root end. J.N.D.A. 8:3
10. Skillen,W. G. "Why root canals should be filled
tNoo tvh. e1 9d3e0n.tinocemental 'unction." J.A.D.A.17:2082
Grove, C. J. Biology of multi-canaliculated roots.
D. Cosmos 58:728 July 1916.
roo1t2 fi. lGlinrgosv efo, lClo.w Ji.n Ng aptuulrpe 'rse mmoevthaol,d w oitfh m aa bkriniegf c: opne-rfect
sDi.d Ceorastmioons o6f3 t:h9e6 8d eOvcetl.o 1p9m2e1n. t of secondary cementurn.
13. Grove, C. J. Faulty technic in investigations of
apices of pulpless teeth. J.A.D.A. 13:746 June 1926.
14. Grove,C. J. A simple standardized technic for
ffiellcint gfi trtoinogt cimanpaelrsm teoa dbelen tmo-acteemriaelnst.a Jl .jAu.nDc.tAio.n 1 w6:i1th5 9p4er-
Sept. 1929.
IS. Grove, C. J. Why root canals should be filled
to dentino-cemental junction. J.A.D.A. 17293 Feb.:
1529 Aug. 1930; 18:314 Feb. 1931.
16. Grove, C. J. Value of dentinocemental junction
in pulp canal surgery. J. D. Res. 11:466 June1931.
17. Ono, Toranosuke. On the anatomy of root canals
with special references to its transition according to
ySeeacr. s1 ,o 8f 2a.ge. Tr., Int. D. Cong. (8th) Tr. Suppl., 1931,
apex made by Grove's opponents have
produced only greater confusion.
MATERIAL AND METHOD
Two hundred and sixty-eight teeth
were obtained, 95 per cent of which were
extracted from cadavers. Some of the
teeth had...