Root-filled teeth must be restored with materials that prevent penetration of bacteria and fluids containing nutrients. Different liners materials and etching techniques are available for use with composite resins. The aim of this study was to compare dye penetration with two liners and two adhesive systems in access cavities of root-filled premolars whilst simultaneously subjected to functional loading. Extracted human premolars were accessed and root-filled. Teeth in groups I and II were lined Vitrebond while groups III and IV were lined with Ionosit. Groups I and III were etched primed with Optibond FL primer. Optibond FL adhesive was placed and filled with Premise composite resin. Groups II and IV had Optibond XLR primer, Optibond FL adhesive and the same composite. Specimens were then mounted and subjected to the equivalent of three months mastication whilst simultaneously immersed in India ink. Specimens were retrieved and sectioned. Dye penetration was measured and expressed as a ratio of the tooth length. Data were analysed by one-way ANOVA, followed by the Bonferroni test. The results showed that controls performed as designed. There was no statistically significant difference between the four experimental groups (p = 0.051). Neither Vitrebond nor Ionosit showed significant differences in preventing dye penetration (t-test, p = 0.663) but the total-etch system had significantly less dye penetration than the self-etch system (t-test, p = 0.007). In conclusions, there was no difference between the two liners in preventing dye penetration. The total-etch system was significantly better at preventing dye penetration than the self-etch system in ideal endodontic access cavities in root-filled premolar teeth.
|Number of pages||10|
|Journal||Journal of the Dental Association of Thailand|
|Publication status||Published - 2016|