Long‐term marginal adaptation and nanoleakage of class V cavity restored with organic filler filled 4‐META/MMA‐TBB resin

Abstract

The current restorative materials used for cervical lesions restoration still need to be improved. A low E-modulus restorative material Bondfill SB (group BF) is developed. This study was to evaluate marginal adaptation and nanoleakage expression at dentin bonding interface of BF before and after artificial aging cycling when used for class V cavity restoration in vitro. Cavities were prepared in human premolars and restored with either Bondfill SB or Z100 (group SZ). Quantitative data were analyzed by t-test (α = 0.05). Before cycling, there was no significant differences between groups for perfect margin and modes of failure. After cycling, SZ showed a higher (p = 0.002) perfect margin value (55.08 AE 15.20%) and less (p = 0.01) adhesive failure (35.35 AE 15.02%) to enamel than BF (25.15 AE 12.47% and 61.78 AE 15.41%, respectively). BF exhibited less (p = 0.01) adhesive failure (12.89 AE 5.58%) to dentin than SZ (44.17 AE 17.50%). BF showed more cohesive failures at both enamel (12.01 AE 3.65%) (p < 0.0001) and dentin (9.58 AE 3.14%) (p = 0.02) sides than SZ (0.77 AE 1.21% and 4.68 AE 1.39%, respectively). Transmission electron microscope (TEM) showed that hybrid layers in SZ and BF were around 0.5 μm thick. Before cycling, more silver deposits were found at dentin bonding interface in SZ. After cycling, the deterioration in SZ mostly occurred at the bottom and on the surface of the hybrid layer. While in BF, the deterioration occurred at the bottom of the hybrid layer and in Bondfill SB. BF showed a more reliable dentin bonding after artificial aging and might buffer the cervical stress concentration. Bondfill SB may be a new promising choice for long-term success of cervical lesions restoration.

4‐META/MMA‐TBB resin containing nano hydroxyapatite induces the healing of periodontal tissue repair in perforations at the pulp chamber floor

“…Previously, our group mixed naHAp and SB and demonstrated that 10% naHAp/SB and 30% naHAp/SB exhibited the same level of tensile strength as SB. 28 SB exhibited the long-term success of cervical root lesions restoration because of strong adhesion to dentin 31 and naHAp/SB could keep its tensile strength after the thermal stressing which was repeated for 5000 cycles. 28 On F I G U R E 1 Effects of naHAp/SB on cell adhesion and proliferation of HPDLSCs.…”

Long-Term Antibacterial Efficacy of Cetylpyridinium Chloride-Montmorillonite Containing PMMA Resin Cement

“…Furthermore, SB contains the acidic functional monomer, which is 4-Methacryloxyethyl trimellitate anhydride (4-META) that can bond to tooth structure [30]. The 4-META/MMA-tri-n-butylborane (TBB) resin formulation of the SB was shown to durably bond to enamel and dentin, especially to deep and cervical dentin, this, in part, owing to its high degree of polymerization in a wet dentin environment compared with other resin-based cements [31]. However, Superbond and Superbond C&B (Sun Medical) were documented with a bond strength that decreased upon 6 months of water-storage aging [32].…”

Which is the most effective biomaterial in indirect pulp capping? 4- year comparative randomized clinical trial

“…It is well known that to achieve a successful restoration at longterm relies on durable marginal integrity of the restoration ( 48 ). Leakage and bacterial migration from the restoration interface can cause a series of problem such as post-operative hypersensitivity, secondary caries and eventually failure of the restoration ( 49 ). In the present study building a wellsealed restoration was the main goal at every stage of the study.…”