Am J Dent. 2025 Feb;39(1):47-52.
ABSTRACT
PURPOSE: To evaluate the effect of different infection control barriers used with light curing units (LCU) on the shear bond strength (SBS) of glass ceramics with various translucencies and thicknesses during adhesive cementation.
METHODS: 60 extracted molar teeth cut in halves mesio-distally to obtain 120 enamel surfaces. Lithium disilicate blocks (GC, Initial Lisi Blocks); 30 High Translucency (HT) 0.5 mm, 30 Low Translucency (LT) 0.5 mm, 30 HT 1.0 mm, 30 LT 1.0 mm discs with 3 mm diameter were produced (n=120). Samples were categorized into three groups according to the infection control barriers (n=40): 1-LCU without barrier, 2-Disposable barrier on LCU (Pinnacle Cure Sleeve), 3-LCU wrapped with stretch film. The SBS test was performed after thermocycling. Failure modes were determined at x20 and classified and statistically analyzed (P< 0.05).
RESULTS: Differences between all the groups were significant (P< 0.001). The highest SBS values were obtained as HT LCU 0.5 mm, LT LCU 0.5 mm, HT Sleeve 0.5 mm and LT Sleeve 0.5 mm, respectively. Highest SBS values were seen in HT LCU 0.5 mm (16.51± 0.68), while LT 1.0 mm stretch (10.76± 1.37) showed the lowest values. Mostly mixed failures occurred in the 0.5 mm sample groups showing higher SBS values.
CLINICAL SIGNIFICANCE: While the application of a sleeve on a LCU may slightly reduce the shear bond strength values of glass ceramics, it can still be beneficial for the cementation of these materials as it helps prevent cross-infection.
PMID:41785028
