pH changes of glass-ionomer lining materials at various time intervals

A. Ben-Amar, R. Liberman, U. Apatowsky, R. Pilo

Research output: Contribution to journalArticlepeer-review


The purpose of this in vitro study was to evaluate pH changes of resin modified glass-ionomer (RMGI) and conventional glass-ionomer liners at short-term intervals after mixing to relate the timing of light activation on the acidity of RMGI lining materials. The RMGI liners tested were Vitre-bond™ (3M), Variglass VLC™ (Dentsply), Fuji Lining LC™ (GC Dental Industrial Corp.) compared to a traditional glass-ionomer liner: Lining Cement™ (GC, control). Light activation of liners was carried out at different time intervals after mixing. The pH changes of each liner were evaluated immediately after mixing and thereafter every minute for 8 min using a surface pH meter. All liners tested exhibited a gradual increase in surface pH over time. The delay of light activation of RMGI lining materials after mixing did not significantly decrease the acidity of the liner during the first 9 min post-mixing.

Original languageEnglish
Pages (from-to)847-852
Number of pages6
JournalJournal of Oral Rehabilitation
Issue number11
StatePublished - Nov 1999


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