Radiopacity of flowable composite by a digital technique

Area of Science:

• Dental Materials Science
• Radiology

Background:

• Radiopacity is crucial for detecting secondary caries and assessing material integration in dental restorations.
• Current flowable composite materials vary in their radiopacity, necessitating standardized evaluation.

Purpose of the Study:

• To digitally assess and compare the radiopacity of 19 current dental flowable composite materials.
• To determine if these materials meet established radiopacity standards, particularly in comparison to enamel.

Main Methods:

• An in vitro study utilizing a digital radiography technique with a CCD sensor.
• Radiopacity was measured using an aluminum step wedge and calibrated against tooth slices and composite specimens.
• Data analysis was performed using Digora 2.6 software to calculate equivalent aluminum thickness.

Main Results:

• All tested flowable composites demonstrated higher radiopacity than dentin.
• 37% of materials exhibited radiopacity lower than enamel.
• Majesty Flow and Charisma Opal Flow showed the highest radiopacity, nearly double that of enamel.

Conclusions:

• Digital radiopacity analysis offers a reliable and efficient method for characterizing dental materials.
• Some current flowable composites do not meet the radiopacity standards equivalent to or exceeding enamel.
• Material manufacturers should prioritize radiopacity exceeding enamel for improved clinical diagnostic capabilities.