Mohammed H Ahmed1,2, Kumiko Yoshihara3,4, Benjamin Mercelis1, Kirsten Van Landuyt1, Marleen Peumans1, Bart Van Meerbeek5. 1. KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium. 2. Tanta University, Department of Dental Biomaterials, Tanta, Egypt. 3. National Institute of Advanced Industrial Science and Technology (AIST), Health Research Institute, Kagawa, Japan. 4. Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Pathology & Experimental Medicine, Okayama, Japan. 5. KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium. bart.vanmeerbeek@kuleuven.be.
Abstract
OBJECTIVES: This study aimed to measure the microtensile bond strength (μTBS) of a new universal adhesive (UA) bonded to dentin following a quick bonding mode. MATERIALS AND METHODS: The experimental UA 'SKB-100,' now commercialized as Clearfil Universal Bond Quick ('C-UBq'; Kuraray Noritake), was investigated, with Scotchbond Universal ('SBU'; 3M Oral Care) and the two-step self-etch (SE) adhesive Clearfil SE Bond 2 ('C-SE2'; Kuraray Noritake) serving as references. The adhesives were employed separately in etch&rinse (E&R) and SE modes on each tooth half following a split-tooth design and following their respective instructions for use, except for C-UBq that besides the manufacturer's instructed quick bonding mode was also applied and left untouched for 20 s prior to light curing ('C-UBq_20s') and for C-SE2 that was also applied in the E&R mode. μTBS of half of the specimens was measured upon 1 week (1w), with the other half tested after 6-month (6m) storage in distilled water at 37 °C. Data were statistically analyzed using linear mixed-effects modeling and three-way ANOVA (p < 0.05). The adhesive-dentin interfaces were ultrastructurally characterized by TEM. RESULTS: C-UBq revealed a significantly lower μTBS than C-SE2. The highest μTBS was recorded for C-UBq_20s_1w and C-SE2_1w, both when applied in E&R mode. However, μTBS of C-UBq_20s significantly decreased upon aging in both modes. C-SE2 presented the significantly highest 'aged' μTBS. CONCLUSION: C-UBq applied in the quick bonding mode did not underperform to the UAs applied for 20 s. Superior bonding effectiveness was achieved by C-SE2 in SE and E&R bonding modes. CLINICAL RELEVANCE: Extended application time of C-UBq improved solely its immediate but not aged bonding effectiveness.
OBJECTIVES: This study aimed to measure the microtensile bond strength (μTBS) of a new universal adhesive (UA) bonded to dentin following a quick bonding mode. MATERIALS AND METHODS: The experimental UA 'SKB-100,' now commercialized as Clearfil Universal Bond Quick ('C-UBq'; Kuraray Noritake), was investigated, with Scotchbond Universal ('SBU'; 3M Oral Care) and the two-step self-etch (SE) adhesive Clearfil SE Bond 2 ('C-SE2'; Kuraray Noritake) serving as references. The adhesives were employed separately in etch&rinse (E&R) and SE modes on each tooth half following a split-tooth design and following their respective instructions for use, except for C-UBq that besides the manufacturer's instructed quick bonding mode was also applied and left untouched for 20 s prior to light curing ('C-UBq_20s') and for C-SE2 that was also applied in the E&R mode. μTBS of half of the specimens was measured upon 1 week (1w), with the other half tested after 6-month (6m) storage in distilled water at 37 °C. Data were statistically analyzed using linear mixed-effects modeling and three-way ANOVA (p < 0.05). The adhesive-dentin interfaces were ultrastructurally characterized by TEM. RESULTS:C-UBq revealed a significantly lower μTBS than C-SE2. The highest μTBS was recorded for C-UBq_20s_1w and C-SE2_1w, both when applied in E&R mode. However, μTBS of C-UBq_20s significantly decreased upon aging in both modes. C-SE2 presented the significantly highest 'aged' μTBS. CONCLUSION:C-UBq applied in the quick bonding mode did not underperform to the UAs applied for 20 s. Superior bonding effectiveness was achieved by C-SE2 in SE and E&R bonding modes. CLINICAL RELEVANCE: Extended application time of C-UBq improved solely its immediate but not aged bonding effectiveness.
Entities:
Keywords:
Bond strength; Durability; Interface; Linear mixed-effects model (LME); TEM
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