الفهرس 
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Abstract
Summary
Aim of the study:
The aim of the study was:
• To Evaluate the amount of secondary caries formation around three different restorative
materials: -
1. Resin-reinforced glass ionomer material (Fuji II LC).
2. Bulk-fill glass hybrid material (Equia Forte).
3. Micro-hybrid composite material (Z100).
By measuring the surface area of the lesions using stereo-microscope.
Materials and methods:
Thirty-six human premolar teeth were collected from the outpatient clinic of the maxillofacial
department, faculty of dentistry, Suez Canal University, and were divided into three groups of twelve
teeth in each group according to the type of restoration used.
group I restored with Fuji II LC material, group II restored with Equia Forte material, and group
III restored with Z100 material according to manufacture instructions.
All teeth were preserved in an artificial caries solution for 5 weeks, and then divided into thin
sections to be evaluated under Stereomicroscope to assess secondary caries lesions formed around
restorations.
Summary
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Results
There was statistically significant difference between secondary caries values on both the buccal
and lingual surfaces of the three groups. Equia Forte (group II) showed the least secondary caries
lesions followed by Fuji II LC (group I), while the highest values were recorded at Z100 (group III