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- Title
Adsorption behavior of methacryloyloxydecyl dihydrogen phosphate on an apatite surface at neutral pH.
- Authors
Bista, Baba; Nakashima, Syozi; Nikaido, Toru; Sadr, Alireza; Takagaki, Tomohiro; Romero, Maria J. R. H.; Sato, Takaaki; Tagami, Junji
- Abstract
This study aimed to quantify the adsorption affinity of neutralized 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP-N) toward hydroxyapatite (HA) and dicalcium phosphate dihydrate (DCPD) at pH 7.0 by employing the Langmuir isotherm model. Furthermore, the effects of inorganic phosphate (Pi) and fluoride (F−) ions on the adsorption of 10-MDP-N onto HA and DCPD were examined. Fixed amounts of HA and DCPD powders were suspended in different concentrations of 10-MDP-N solutions and were incubated for 18 h. Equilibrated concentrations of 10-MDP-N were measured by spectrophotometry and the adsorption affinity was estimated using the Langmuir model. Moreover, the adsorption was examined by zeta-potential analysis. The results indicated that significant Langmuir correlation was noted in both substrates, along with an increasing negative zeta-potential; however, in DCPD the correlation was less strong. The addition of 1.0 mM Pi slightly delayed the adsorption of 10-MDP-N onto both substrates, whereas 3.0 mM Pi drastically delayed adsorption onto HA but completely inhibited adsorption onto DCPD. Up to 50 ppm, F− enhanced the adsorption onto HA, and the adsorption plateaued at higher concentrations of F−, whereas no obvious influence of F− on the adsorption onto DCPD was noted.
- Subjects
ADHESIVES; ADSORPTION (Chemistry); STATISTICAL correlation; DENTAL materials; PROTONS; REGRESSION analysis; RESEARCH funding; SPECTROPHOTOMETRY; STATISTICS; DATA analysis; DATA analysis software; ONE-way analysis of variance
- Publication
European Journal of Oral Sciences, 2016, Vol 124, Issue 2, p195
- ISSN
0909-8836
- Publication type
Article
- DOI
10.1111/eos.12254