Katalog der Universitätsbibliothek Erlangen-Nürnberg

Zurück zur Trefferliste

Self-adhesive resin cements: pH-neutralization, hydrophilicity, and hygroscopic expansion stress

Primo: Aufsätze und mehr (1/1)

Speichern in:

Self-adhesive resin cements: pH-neutralization, hydrophilicity, and hygroscopic expansion stress

In: Clinical Oral Investigations, 2017, Vol.21(5), pp.1735-1741
Verfasser: Roedel, Lena , Bednarzig, Vera , Belli, Renan , Petschelt, Anselm , Lohbauer, Ulrich , Zorzin, José
Erscheinungsort: Berlin/Heidelberg
Verlag: Springer Berlin Heidelberg
Erscheinungsjahr: 2017
ISSN: 1432-6981 , 1436-3771 , 1432-6981
Schlagwort: Self-Adhesive Resin Cements / Ph / Hydrophilicity / Hygroscopicity / Expansion Stress
Datenquelle: SpringerLink
Erscheinungsform: article
  • Exemplare
  • Bestellung/Verfügbarkeit
  • mehr zum Titel
Titel:Self-adhesive resin cements: pH-neutralization, hydrophilicity, and hygroscopic expansion stress
Verfasser:Roedel, Lena
Verfasser:Bednarzig, Vera
Verfasser:Belli, Renan
Verfasser:Petschelt, Anselm
Verfasser:Lohbauer, Ulrich
Verfasser:Zorzin, José
Verlag:Springer Berlin Heidelberg
Enthält:To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1007/s00784-016-1947-4 Byline: Lena Roedel (1), Vera Bednarzig (1), Renan Belli (1), Anselm Petschelt (1), Ulrich Lohbauer (1), Jose Zorzin (1) Keywords: Self-adhesive resin cements; pH; Hydrophilicity; Hygroscopicity; Expansion stress Abstract: Objectives The objective of the study was to investigate the relationship between pH-neutralization, hydrophilicity, and free hygroscopic expansion stress of self-adhesive resin cements (SARCs) after storage in artificial saliva. Materials and methods The SARCs RelyX Unicem Automix 2 (RX2, 3 M ESPE), iCEM (iCEM, Heraeus) and Maxcem Elite (MCE, Kerr) were under investigation in this study. Cylinders (height x diameter, 6 x 4mm) were prepared from each material and stored in artificial saliva (7d at 37 [degrees]C). Cylinder height was measured at baseline and after 7 days. After storage, the compression modulus was measured to calculate the free hygroscopic expansion stress. For pH-neutralization and hydrophilicity assessment, disks (height x diameter, 1 x 1.5 mm) were prepared, covered with electrolyte, and monitored over 24 h at 37 [degrees]C. Hydrophilicity was assessed using the static sessile drop technique at baseline and at different time intervals up to 24 h. Data were analyzed using one-way ANOVA and post hoc Student-Newman-Keuls test (S-N-K, [alpha] = 0.05). Results After 24 h, RX2 (pH.sub.24h 4.68) had a significantly higher (p < 0.05) pH-value than MCE (pH.sub.24h 4.2) and iCEM (pH.sub.24h 3.23). iCEM showed the significantly highest hydrophilicity (p < 0.05) after 24 h (I[cedilla].sub.24h 85.02[degrees]), while MCE resulted lower (I[cedilla].sub.24h 113.01[degrees]) in comparison with RX2 (I[cedilla].sub.24h 108.11[degrees]). The resulting hygroscopic expansion stress of iCEM (29.15 MPa) was significantly higher (p < 0.05) compared to RX2 (14.5 MPa) and MCE (21.02 MPa). Conclusions The material with lowest pH-neutralization capacity displayed higher hydrophilicity after 24 h and higher hygroscopic expansion stress after 7 days compared to those with high pH-neutralization. Clinical significance Remnant hydrophilicity due to low pH-neutralization of SARCs could lead to cement interface stress build-up and long-term failure of silicate ceramic restorations. Author Affiliation: (1) Dental Clinic 1--Operative Dentistry and Periodontology, Friedrich-Alexander University Erlangen-Nurnberg, Erlangen, Gluckstr. 11, 91054, Erlangen, Germany Article History: Registration Date: 23/08/2016 Received Date: 02/03/2016 Accepted Date: 23/08/2016 Online Date: 23/09/2016
In:Clinical Oral Investigations, 2017, Vol.21(5), pp.1735-1741
In:Clinical Oral Investigations
Schlagwort:Self-Adhesive Resin Cements / Ph / Hydrophilicity / Hygroscopicity / Expansion Stress