On the effect of an internal light conductor on the marginal integrity of class-II composite fillings

Dental Materials : Official Publication of the Academy of Dental Materials
R StollV Stachniss

Abstract

The aim of this study was to examine the marginal behavior of class-II double surface fillings made with newly designed light transmitting inserts. These inserts guide the polymerization light directly into the body of the filling. Sixty standardized two-surface cavities have been prepared into freshly extracted human molars and filled with Herculite XRV. Fifteen cavities were filled using the incremental technique (positive control group), 15 were filled with one single increment (negative control group) and 15 teeth each were filled with light conducting inserts with and without use of the light conducting system. Before and after thermomechanical stressing in a chewing simulator (50,000x50N and 2000 cycles between 5 degrees C and 55 degrees C), the amount of perfect margin was measured by quantitative margin analysis using a SEM. Additionally, following dye penetration (24h, 0.1% methylene blue), all teeth were cut in the mesio-distal direction and the amount of penetration was measured. The group with light transmitting inserts showed 79.8% perfect margin, the positive control group 68.0%, the group with inactive inserts 65.4% and the negative control group 57.8%. MANOVA showed a strong effect (p<0.001) on the parameters gr...Continue Reading

References

Jun 1, 1988·The Journal of the American Dental Association·R H BullardC M Russell
Apr 1, 1997·European Journal of Oral Sciences·A Peutzfeldt
Dec 10, 1999·Biomedizinische Technik. Biomedical Engineering·A P Sommer, M Gente
Nov 1, 1987·Journal of Dental Research·A J FeilzerC L Davidson
Feb 24, 2001·Clinical Oral Investigations·M FederlinG Schmalz

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Citations

Feb 18, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Mihai RominuAdrian Gh Podoleanu

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