Effect of Polymerization Accelerator on Dentin Bonding of One-step Bonding Agent

Wakamatsu, Shogo; Ikemi, Takuji

doi:10.4012/dmj.26.7

Cited by 1 publication

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As disclosed from the available data [20–22], the spontaneous polymerization offered both negative and positive ramifications: the storage stability of the systems may be a problem, whereas the effectiveness in adhesive bonding can be probably improved. Therefore, it is important to understand the “spontaneous” reactivity of self-etch adhesives in order to potentially maximize both storage stability and adhesive bonding efficacy.…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite induces spontaneous polymerization of model self-etch dental adhesives

Zhang

Bai

et al. 2013

Materials Science and Engineering: C

View full text Add to dashboard Cite

The objective of this study is to report for the first time the spontaneous polymerization phenomenon of self-etch dental adhesives induced by hydroxylapatite (HAp). Model self-etch adhesives were prepared by using a monomer mixture of bis[2-(methacryloyloxy)ethyl] phosphate (2MP) with 2-hydroxyethyl methacrylate (HEMA). The initiator system consisted of camphorquinone (CQ, 0.022 mmol/g) and ethyl 4-dimethylaminobenzoate (4E, 0.022–0.088 mmol/g). HAp (2–8 wt.%) was added to the neat model adhesive. In a dark environment, the polymerization was monitored in-situ using ATR/FT-IR, and the mechanical properties of the polymerized adhesives were evaluated using nanoindentation technique. Results indicated that spontaneous polymerization was not observed in the absence of HAp. However, as different amounts of HAp were incorporated into the adhesives, spontaneous polymerization was induced. Higher HAp content led to higher degree of conversion (DC), higher rate of polymerization (RP) and shorter induction period (IP). In addition, higher 4E content also elevated DC and RP and reduced IP of the adhesives. Nanoindentation result suggested that the Young's modulus of the polymerized adhesives showed similar dependence on HAp and 4E contents. In summary, interaction with HAp could induce spontaneous polymerization of the model self-etch adhesives. This result provides important information for understanding the initiation mechanism of the self-etch adhesives, and may be of clinical significance to strengthen the adhesive/dentin interface based on the finding.

show abstract

Section: Introductionmentioning

confidence: 99%