OBJECTIVE: The aim of this study was to investigate the effect of aluminosilicate clay nanotubes (Halloysite, HNT) incorporated into the adhesive resin of a commercially available three-step etch and rinse bonding system (Adper Scotchbond Multi-Purpose/SBMP) on dentin bond strength, as well as the effect on several key physicochemical properties of the modified adhesive. METHODS: Experimental adhesives were prepared by adding five distinct HNT amounts (5-30 wt.%) into the adhesive resin (w/v) of the SBMP dentin bonding system. Bond strength to human dentin, microhardness, and degree of conversion (DC) of the modified adhesives were assessed. RESULTS: From the shear bond strength data, it was determined that HNT incorporation at a concentration of 30 wt.% resulted in the highest bond strength to dentin that was statistically significant (p=0.025) when compared to the control. Even though a significant increase in microhardness (p<0.001) was seen for the 30 wt.% HNT-incorporated group, a significantly lower DC (p<0.001) was recorded when compared to the control. SIGNIFICANCE: It was concluded that HNT can be incorporated up to 20 wt.% without jeopardizing important physicochemical properties of the adhesive. The modification of the SBMP dentin bonding agent with 20 wt.% HNT appears to hold great potential toward contributing to a durable dentin bond; not only from the possibility of strengthening the bond interface, but also due to HNT intrinsic capability of encapsulating therapeutic agents such as matrix metalloproteinase (MMP) inhibitors.
OBJECTIVE: The aim of this study was to investigate the effect of aluminosilicate clay nanotubes (Halloysite, HNT) incorporated into the adhesive resin of a commercially available three-step etch and rinse bonding system (Adper Scotchbond Multi-Purpose/SBMP) on dentin bond strength, as well as the effect on several key physicochemical properties of the modified adhesive. METHODS: Experimental adhesives were prepared by adding five distinct HNT amounts (5-30 wt.%) into the adhesive resin (w/v) of the SBMP dentin bonding system. Bond strength to human dentin, microhardness, and degree of conversion (DC) of the modified adhesives were assessed. RESULTS: From the shear bond strength data, it was determined that HNT incorporation at a concentration of 30 wt.% resulted in the highest bond strength to dentin that was statistically significant (p=0.025) when compared to the control. Even though a significant increase in microhardness (p<0.001) was seen for the 30 wt.% HNT-incorporated group, a significantly lower DC (p<0.001) was recorded when compared to the control. SIGNIFICANCE: It was concluded that HNT can be incorporated up to 20 wt.% without jeopardizing important physicochemical properties of the adhesive. The modification of the SBMP dentin bonding agent with 20 wt.% HNT appears to hold great potential toward contributing to a durable dentin bond; not only from the possibility of strengthening the bond interface, but also due to HNT intrinsic capability of encapsulating therapeutic agents such as matrix metalloproteinase (MMP) inhibitors.
Authors: Mohammed S Alkatheeri; Jadesada Palasuk; George J Eckert; Jeffrey A Platt; Marco C Bottino Journal: Clin Oral Investig Date: 2015-02-10 Impact factor: 3.573
Authors: Sabrina A Feitosa; Jadesada Palasuk; Saulo Geraldeli; Lester Jack Windsor; Marco C Bottino Journal: J Biomed Mater Res B Appl Biomater Date: 2018-09-10 Impact factor: 3.368
Authors: Sara Kalagi; Sabrina A Feitosa; Eliseu A Münchow; Victor M Martins; Ashley E Karczewski; N Blaine Cook; Kim Diefenderfer; George J Eckert; Saulo Geraldeli; Marco C Bottino Journal: Dent Mater Date: 2020-03-30 Impact factor: 5.304
Authors: S A Feitosa; J Palasuk; K Kamocki; S Geraldeli; R L Gregory; J A Platt; L J Windsor; M C Bottino Journal: J Dent Res Date: 2014-09-08 Impact factor: 6.116
Authors: Jadesada Palasuk; L Jack Windsor; Jeffrey A Platt; Yuri Lvov; Saulo Geraldeli; Marco C Bottino Journal: Clin Oral Investig Date: 2017-09-30 Impact factor: 3.573
Authors: Diana A Cunha; Nara S Rodrigues; Lidiane C Souza; Diego Lomonaco; Flávia P Rodrigues; Felipe W Degrazia; Fabrício M Collares; Salvatore Sauro; Vicente P A Saboia Journal: Materials (Basel) Date: 2018-06-25 Impact factor: 3.623