Effect of a Hydroxyl Ion-Releasing Composite Resin on Plaque Acidogenicity

Vol. 39, No. 3, 2005

Free Abstract Article (References) Article (PDF 142 KB)

Original Paper

Effect of a Hydroxyl Ion-Releasing Composite Resin on Plaque Acidogenicity
A. Persson^a, P. Lingström^b, J.W.V. van Dijken^a

^aDental Hygienist Education, Department of Odontology, University of Umeå, Umeå, and
^bDepartment of Cariology, Faculty of Odontology, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden

Address of Corresponding Author

Caries Res 2005;39:201-206 (DOI: 10.1159/000084799)

Key Words

Clinical evaluation
Composite resin
Dental materials
Plaque pH

Abstract

The aim of this in vivo study was to evaluate the neutralizing capacity, registered as change of plaque acidogenicity, on aged proximal restorations of an ion-releasing composite resin (IRCR), which releases hydroxyl, calcium, and fluoride ions at low pH. Twenty patients, with a mean age of 63 years (range 43-85), participated. All had one aged proximal IRCR restoration (mean age 15 months) and one nonrestored enamel surface to make an intraindividual comparison possible. The neutralizing effect of the IRCR was evaluated by measuring plaque pH, using the microtouch method, after a mouthrinse with 10% sucrose. The plaque pH measurements were repeated 1.5 years later on the IRCR (mean age 34 months), the enamel surfaces and a universal hybrid composite resin (CR). At both 15 and 34 months, the plaque on the IRCR surfaces showed the least acidogenic potential for the whole 60-min time interval. The largest differences between the IRCR, CR and enamel were found during the first 15 min. At 15 months, the total areas under the plaque pH curve (AUC_5.7 and AUC_6.2) differed significantly between the IRCR and enamel surfaces for the time periods 0-5 min and 5-15 min. At 34 months, significant differences were found between IRCR and CR at the 0- to 5-min time period. It can be concluded that IRCR restorations countered the plaque pH fall and maintained it at levels where less enamel and dentin demineralization can occur.

Author Contacts

Anitha Persson
Department of Odontology, Dental Hygienist Education, Dental School
Umeå University
SE-90187 Umeå (Sweden)
Tel. +46 90 7856034, 7856226, Fax +46 90 770580, E-Mail anitha.persson@odont.umu.se

Article Information

Received: July 8, 2002
Accepted after revision: July 14, 2004
Number of Print Pages : 6
Number of Figures : 4, Number of Tables : 2, Number of References : 27

Medline Abstract (ID 15914982)

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