Indiana University-Purdue University Indianapolis (IUPUI) / Formocresol pulpotomy has been recommended for all infected primary
molars irrespective of pulp vitality. Microscopic evidence is lacking
when teeth with less than optimal pulpal preoperative conditions are
treated. This study evaluated clinically, radiographically, and microscopically
the effect of the five-minute formocresol pulpotomy in primary
and permanent teeth of dogs with induced pulpal and periapical
pathoses.
Radicular pulps of 18 permanent and 12 primary teeth were exposed
to the oral flora for 28 and 14 days, respectively, to produce pathoses
that would contraindicate routine use of the pulpotomy. The five-minute
formocresol pulpotomy was performed and nine permanent teeth were evaluated
after four weeks and another nine after 12 weeks; the primary teeth
were evaluated after 14 days. Eight permanent and four primary "control”
teeth had their radicular pulps exposed to the oral flora for identical
periods but were not treated by formocresol.
In permanent teeth clinical success was 90 per cent, radiographic
success was 30 per cent, and microscopic success of bloc sections was
10 per cent. The vital pulp reacted to formocresol by forming a homogenous
band of markedly eosinophilic tissue, interpreted as "fixation;"
very pale staining tissue was apical to this. A second area of marked
eosinophilic tissue was in the apical part of all vital canals, apical
to which was vital normal pulp. Similar trends were seen in the primary
teeth.
No "fixation," organization or repair was seen within any periapical
lesion. The microscopic periapical appearance of related vital
permanent and all necrotic canals indicated that formocresol pulpotomy
is not particularly effective in teeth with induced pulpal and periapical
pathoses. The findings suggest that it be used only under optimal
clinical conditions.
| Identifer | oai:union.ndltd.org:IUPUI/oai:scholarworks.iupui.edu:1805/3560 |
| Date | January 1971 |
| Creators | Kennedy, David B., 1946- |
| Contributors | Mitchell, David, Garner, La Forrest Dean, 1933-, Kasle, Myron J., Mercer, Victor H., 1928- |
| Source Sets | Indiana University-Purdue University Indianapolis |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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