Tarek A Omran1,2,3, Sufyan Garoushi4,5, Aous A Abdulmajeed5,6,7, Lippo V Lassila4,5,8, Pekka K Vallittu4,5,9. 1. Turku Clinical Biomaterials Centre (TCBC), University of Turku, Turku, Finland. tarek.omran@utu.fi. 2. Department of Biomaterials Science, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520, Turku, Finland. tarek.omran@utu.fi. 3. Finnish Doctoral Program in Oral Sciences (FINDOS), Institute of Dentistry, University of Turku, Turku, Finland. tarek.omran@utu.fi. 4. Turku Clinical Biomaterials Centre (TCBC), University of Turku, Turku, Finland. 5. Department of Biomaterials Science, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520, Turku, Finland. 6. Department of Prosthetic Dentistry, Institute of Dentistry, University of Turku, Turku, Finland. 7. Department of General Practice, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, USA. 8. Faculty of Health and Well-being, Turku University of Applied Sciences, Turku, Finland. 9. City of Turku Welfare Division, Oral Health Care, Turku, Finland.
Abstract
OBJECTIVES: Bulk-fill resin composites (BFCs) are gaining popularity in restorative dentistry due to the reduced chair time and ease of application. This study aimed to evaluate the influence of increment thickness on dentin bond strength and light transmission of different BFCs and a new discontinuous fiber-reinforced composite. MATERIALS AND METHODS: One hundred eighty extracted sound human molars were prepared for a shear bond strength (SBS) test. The teeth were divided into four groups (n = 45) according to the resin composite used: regular particulate filler resin composite: (1) G-ænial Anterior [GA] (control); bulk-fill resin composites: (2) Tetric EvoCeram Bulk Fill [TEBF] and (3) SDR; and discontinuous fiber-reinforced composite: (4) everX Posterior [EXP]. Each group was subdivided according to increment thickness (2, 4, and 6 mm). The irradiance power through the material of all groups/subgroups was quantified (MARC® Resin Calibrator; BlueLight Analytics Inc.). Data were analyzed using two-way ANOVA followed by Tukey's post hoc test. RESULTS: SBS and light irradiance decreased as the increment's height increased (p < 0.05), regardless of the type of resin composite used. EXP presented the highest SBS in 2- and 4-mm-thick increments when compared to other composites, although the differences were not statistically significant (p > 0.05). Light irradiance mean values arranged in descending order were (p < 0.05) EXP, SDR, TEBF, and GA. CONCLUSIONS: As increment thickness increased, the light transmission decreased for all tested resin composites. Discontinuous fiber-reinforced composite showed the highest value of curing light transmission, which was also seen in improved bonding strength to the underlying dentin surface. CLINICAL RELEVANCE: Discontinuous fiber-reinforced composite can be applied safely in bulks of 4-mm increments same as other bulk-fill composites, although, in 2-mm thickness, the investigated composites showed better performance.
OBJECTIVES: Bulk-fill resin composites (BFCs) are gaining popularity in restorative dentistry due to the reduced chair time and ease of application. This study aimed to evaluate the influence of increment thickness on dentin bond strength and light transmission of different BFCs and a new discontinuous fiber-reinforced composite. MATERIALS AND METHODS: One hundred eighty extracted sound human molars were prepared for a shear bond strength (SBS) test. The teeth were divided into four groups (n = 45) according to the resin composite used: regular particulate filler resin composite: (1) G-ænial Anterior [GA] (control); bulk-fill resin composites: (2) Tetric EvoCeram Bulk Fill [TEBF] and (3) SDR; and discontinuous fiber-reinforced composite: (4) everX Posterior [EXP]. Each group was subdivided according to increment thickness (2, 4, and 6 mm). The irradiance power through the material of all groups/subgroups was quantified (MARC® Resin Calibrator; BlueLight Analytics Inc.). Data were analyzed using two-way ANOVA followed by Tukey's post hoc test. RESULTS:SBS and light irradiance decreased as the increment's height increased (p < 0.05), regardless of the type of resin composite used. EXP presented the highest SBS in 2- and 4-mm-thick increments when compared to other composites, although the differences were not statistically significant (p > 0.05). Light irradiance mean values arranged in descending order were (p < 0.05) EXP, SDR, TEBF, and GA. CONCLUSIONS: As increment thickness increased, the light transmission decreased for all tested resin composites. Discontinuous fiber-reinforced composite showed the highest value of curing light transmission, which was also seen in improved bonding strength to the underlying dentin surface. CLINICAL RELEVANCE: Discontinuous fiber-reinforced composite can be applied safely in bulks of 4-mm increments same as other bulk-fill composites, although, in 2-mm thickness, the investigated composites showed better performance.
Entities:
Keywords:
Bulk-fill composites; Composite base materials; Debonding test; Light irradiance; Shear bond strength; Thickness
Authors: Richard B T Price; Daniel Labrie; Frederick A Rueggeberg; Braden Sullivan; Ivan Kostylev; John Fahey Journal: Dent Mater Date: 2014-12 Impact factor: 5.304
Authors: Andrea Scribante; Pekka K Vallittu; Mutlu Özcan; Lippo V J Lassila; Paola Gandini; Maria Francesca Sfondrini Journal: Biomed Res Int Date: 2018-10-22 Impact factor: 3.411