The effect of three lining materials on microleakage of packable composite resin restorations in young premolars with cavity margins located on enamel and dentin/cementum - An In vitro study
Objectives: The objective of our in vitro investigation was to assess the effect of a layer of three lining materials; flowable composite, flowable compomer, and light-curing glass ionomer cement as a liner on microleakage with Class V packable composite restorations in young premolar teeth.
Materials and Methods: A total of 40 premolars were assigned randomly into four groups of 10 teeth each (Groups 1, 2, 3, and 4). Class V cavities (3 mm × 2 mm × 1.5 mm) were prepared in a standardized technique on the buccal surface of every tooth with the cervical margin extending 0.5 mm below the cementoenamel junction, into the dentin. Cavities in the first group (control group) were filled with packable composite (Heliomolar HB) without liners. Cavities in Groups 2, 3, and 4 were restored with packable composite after placing flowable composite (Heliomolar Flow), light-curing glass ionomer cement (Vivaglass), and flowable compomer (Compoglass Flow) as liners, respectively. The 40 restored teeth were put in thermocycling machine, then immersed in 2% methylene blue solution for a period of 24 h to permit penetration of methylene blue into potential microgaps that might have been created between the restorative material and the tooth. Each tooth was then cut buccolingually into two halves through the center of the restoration parallel to their long axes. Photomicrographs of each group were captured, then examined using the ImageJ an analysis software.
Results: Control group (packable composite), Group 2 (flowable composite), and Group 3 (light-curing glass ionomer cement) showed no statistical significance between them. The difference between control group (packable composite) and Group 4 (flowable compomer) was statistically significant.
Conclusions: Flowable compomer as intermediate lining material can significantly reduce microleakage under packable composite.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).