Indiana University-Purdue University Indianapolis (IUPUI) / This clinical study investigated the efficacy of the new LED LCU technology
when compared to that of the QTH LCU by evaluating retention and wear of Clinpro (3M
ESPE) sealant material over six months of function. This study was designed as a split
mouth, randomized clinical study. Sealants were placed and polymerized on contralateral
teeth of 35 patients, 33 of which successfully completed the study. The sealants were
evaluated for clinical retention at baseline, three months, and six months by two
evaluators. For the wear analysis, the area of the sealant wear at six months is reported.
Nine pairs of molars and 22 pairs of premolar teeth were used. This sample size is
smaller than the original sample used for clinical evaluation, because a number of the
baseline impressions had to be discarded due to poor impression quality. Subsequent
impressions were taken at three months, and six months. Epoxy replicas were made from
the impressions and the occlusal surface of each replica was digitized using SigmaScan
software. A cummulative legit model was applied to the clinical data, and a linear model
was applied to the wear analysis.
The results for clinical retention over the six months of function were as follows.
At Baseline, for the QTH, 97.3 percent of the teeth received an Alpha score; 2.7 percent
received a score of B. For the LED, 87.7 percent received a score of A; 12.3 percent
received a score of B. At three months follow-up, for the QTH, 93.1 percent received a
score of A; 6.9 percent received a score of B. For the LED, 86.1 percent received a score
of A; 12.5 percent received a score of B, and 1.14 percent received a score of C. At six
months follow-up, for QTH; 91.7 percent received a score of A; 8.3 percent received a
score of B. For the LED, 83.3 percent received a score of A; 15.3 percent received a
score of B, and 1.14 percent received a score of C.
The hypothesis was that there would be no significant difference in clinical
retention and wear of Clinpro's sealant polymerized with the QTH or the LED light
sources over six months of function. Based on the results of this clinical study, the
following conclusions can be made:
1) At baseline, Clinpro's sealant polymerized with QTH light source showed
marginally significant better retention than LED light source (p-value 0.05001).
2) There was no significant difference between light sources for sealant clinical
retention at three-month and six-month follow up visits.
3) Wear analysis resulted in marginally significant more wear for molar sealants
polymerized with LED LCU (p-value 0.0755).
4) Wear analysis showed no significant difference for premolar sealants
polymerized with either light source.
| Identifer | oai:union.ndltd.org:IUPUI/oai:scholarworks.iupui.edu:1805/4385 |
| Date | January 2004 |
| Creators | White, Marcia Stoddart |
| Contributors | Avery, David R., Platt, Jeffrey A., 1958-, Moore, B. Keith, Weddell, James A. (James Arthur), 1949-, Sanders, Brian J., Matis, Bruce A. |
| Source Sets | Indiana University-Purdue University Indianapolis |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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