Indiana University-Purdue University Indianapolis (IUPUI) / The purpose of this study was to demonstrate
the clinical application of the television microscope
for direct intraoral micromeasurement of
cavity margin deterioration. Mesiocclusal alloy
restorations were placed in fifty-one maxillary
second deciduous molars. A cast gold overlay
with two proximal margin observation holes, one
hole in the occlusal one-third and one hole in the
gingival one-third, was fabricated for each restored
tooth. The mesiobuccal proximal margins
of the restorations were observed by the television
microscope, and the marginal deterioration was
electronically measured at intervals of one week,
two weeks, four weeks, 12 weeks, 24 weeks, and
36 weeks postoperatively. The average gingival
marginal deterioration ranged from 4.9 microns at
one week to 37.8 microns at 36 weeks; the average
occlusal marginal deterioration ranged from 5. 4
microns at one week to 60.1 microns at 36 weeks.
The data indicated that the gingival area of the
proximal margin deteriorated at a faster rate
during the first 12 weeks postoperatively, and the
occlusal area of the gingival margin deteriorated at
a faster rate during the last 24 weeks. Greater
marginal alloy flash in the gingival area was
believed to be responsible for the initial
gingival deterioration, and repeated masticatory
stresses was believed to be major causative factor
for the occlusal deterioration during the last 24 weeks
of the study.
| Identifer | oai:union.ndltd.org:IUPUI/oai:scholarworks.iupui.edu:1805/4141 |
| Date | January 1966 |
| Creators | Horwitz, Burton Allan, 1937- |
| Source Sets | Indiana University-Purdue University Indianapolis |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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