Influence of dentin substrates to simplify wet‐bonding: A leakage‐free and reliable tensile strength interface for long‐lasting restorations

Abstract

The wet-bonding procedure can be simplified by eliminating the primer. An aqueous mixture of 1% citric acid and 1% ferric chloride (1-1) was hypothesized as providing an easier dehydratable thinner substrate to which 4-META/MMA-TBB resin can adhere reliably. The 1-1 was applied for 10 s and rinsed off with water for 10 s. Demineralized dentin under four conditions was prepared before bonding to PMMA rod using 4-META/MMA-TBB resin: air-dried 10 s (D-NP); air-dried 10 s, primed 60 s with 5% 4-META in acetone (D-P); blotted dry 10 s (W-NP); blotted dry 10 s, primed 60 s (W-P). The tensile strengths (MPa) using mini-dumbbell specimens were 4.0 ± 2.4 for D-NP, 10.6 ± 5.4 for D-P, 38.3 ± 4.4 for W-NP, and 42.9 ± 3.3 for W-P. There was no significant difference between W-NP and W-P with cohesive failure in the dentin and the cured resin. In the wet groups, the hybridized dentin was stable against both HCl and NaOCl challenges. TEM examination and a leakage tests confirmed a perfect seal with a leakage-free interface of W-NP. These results suggest that this primer-less wet-bonding is promising method to protect the underlying intact dentin and pulp, thus providing long-lasting dental treatment.

Novel Tuning of PMMA Orthopedic Bone Cement Using TBB Initiator: Effect of Bone Cement Extracts on Bioactivity of Osteoblasts and Osteoclasts

“…The critical difference in chemical composition between PMMA-TBB and PMMA-BPO materials is the polymerization initiator. Resin materials containing TBB as a polymerization initiator are widely used as cementing materials in dentistry [ 18 , 50 , 51 , 52 , 53 ], because of the higher degree of polymerization [ 54 ]. Another unique feature of TBB-containing cements is that the polymerization reaction proceeds effectively in a humidified environment [ 17 , 55 ].…”

Marginal Micro-Seal and Tensile Bond Strength of a Biopolymer Hybrid Layer Coupled with Dental Prosthesis Using a Primerless-Wet System

“…A 1–3 µm hybridized dentin layer suggested that 1-1 conditioned dentin was sufficiently permeable for water to evaporate and for monomers to impregnate. Thus, only blot-drying with or without primer (primerless-wet bonding) can produce a complete hybrid layer that reinforces the dentin [ 10 , 17 ] and prevents dye penetration of direct restorations [ 7 , 17 ].…”

Avaliação da união resina-dentina utilizando diferentes abordagens de condicionamento dentinário

“…A morfologia da área de união encontrada com o uso da mistura de ácido cítrico e cloreto férrico (solução 10:3) está de acordo com os relatos da literatura Piemjai et al, 2011). A capacidade de formação de uma zona de hibridização sobre dentina tratada com solução 10:3 já é conhecida há muito tempo.…”