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STUDY CONCERNING THE WEAR BEHAVIOUR OF SOME
RESTORATIVE GLASS IONOMER MATERIALS USED IN
DENTAL PRACTICE
by
IRINA GRĂDINARU, ELENA RALUCA BACIU, ANDREEA
VELEA,
MARIA BACIU and DANIELA CALAMAZ
Abstract. Glass ionomer cements have a wide range of usages in
dental practice. The aim of the present work was to study the wear
resistance of different glass ionomer cements frequently used in the
restoring dental medicine. Experimental researches related to the
abrasive wear behaviour were run for 2 glass ionomer cements, out of
which a conventional one (Kavitan Plus- Spofa Dental) and one
reinforced with silver (Silvercem- W+P Dental). The abrasive wear
behaviour of the dental materials under analysis was highlighted by the
determination of the mass wear, the intensity and speed of mass wear.
The statistic analysis of data was made by means of SPSS programme for
Windows 12, using the “pair” t test. From the analysis of the
experimental data we notice that Silvercem exhibits the lowest values of
absolute mass loss when using the force of 30 N. The behaviour of
Silvercem glass ionomer may be explained by the incorporation of Silver
particles in its composition giving it a superior wear resistance as
compared to the classic glass ionomers such as Kavitan Plus which in
this study obtained slightly inferior results of the wear resistance when
using the force of 30 N. Thus, Kavitan Plus exhibits values almost
identical of the wear resistance in the first two thirds of the friction
layout, the mass loss decreasing in the last part. Kavitan Plus glass
ionomer cement exhibits the highest wear resistance during the tests with
10 N forces, when it registered the lowest values of substance absolute
loss. As the force increases, this material is outrun by Silvercem.
Key words: glass ionomer cements, wear behaviour, dental
materials, dental medicine.