Naslov
Detection of HEMA in self-etching adhesive systems using high performance liquid chromatography

Autori
Pandurić, Vlatko ; Tarle, Zrinka ; Hameršak, Zdenko ; Stipetić, Irena ; Matošević, Danijela ; Negovetić Mandić, Višnja ; Prskalo, Katica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
EUCMOS 2008, XXIX European Congress on Molecular Spectroscopy Book of Abstracts / Musić, Svetozar ; Ristić, Mira ; Krehula, Stjepko - Zagreb : Institut Ruđer Bošković, 2008, 246-246

ISBN
978-953-6690-76-3

Skup
XXIX European Congress on Molecular Spectroscopy

Mjesto i datum
Opatija, Hrvatska, 31.08.2008. - 05.09.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
high performance liquid chromatography; self-etching adhesive systems; HEMA

Sažetak
One of the factors that can decrease hydrolytic stability of self-etching adhesive systems (SEAS) is 2- hydroxymethylmethacrylate (HEMA). Due to hydrolytic instability of acidic methacrylate monomers in SEAS, HEMA can be present even if the manufacturer did not include it in original composition. The aim of the study was to determine the presence of HEMA because of decomposition by hydrolysis of methacrylates during storage, resulting with loss of adhesion strength to hard dental tissues of the tooth crown. Three most commonly used SEAS were tested: AdheSE ONE, G-Bond and iBond under different storage conditions. High performance liquid chromatography analysis was performed on a Nucleosil C18-100 5  m (250x4.6 mm) column, Knauer K-501 pumps and Wellchrom DAD K-2700 detector at 215 nm. Data were collected and processed by EuroCrom 2000 HPLC software. Calibration curves were made related eluted peak area to known concentrations of HEMA (purchased from Fluka). The elution time for HEMA is 12.25 min at flow rate 1.0 ml/min. Obtained results indicate that no HEMA was present in AdheSE ONE because methacrylates are substituted with methacrylamides that seem to be more stable under acidic aqueous conditions. In all other adhesive systems HEMA was detected.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Dentalna medicina

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