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Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

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Comparative radiopacity of bonding agents.

Masato Hotta¹, Kohji Yamamoto

¹Department of Operative Dentistry, School of Dentistry, Asahi University, Gifu, Japan. w7mhotta@dent.asahi-u.ac.jp

The Journal of Adhesive Dentistry

|July 17, 2009

Summary

This study evaluated the radiopacity of 15 dental bonding agents. One agent, containing surface pre-reacted glass-ionomer fillers, demonstrated radiopacity comparable to or exceeding dentin, unlike other agents.

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Area of Science:

Dental Materials Science
Biomaterials
Radiology

Background:

Radiopacity is crucial for dental materials to visualize them on radiographs.
Assessing the radiopacity of new dental bonding agents is essential for clinical diagnosis.
Understanding filler content and elemental composition influences material radiopacity.

Purpose of the Study:

To determine the inorganic filler content and elemental composition of 15 new bonding agents.
To measure and compare the radiopacity of these bonding agents against enamel and dentin.
To investigate the relationship between filler characteristics and radiopacity in dental bonding agents.

Main Methods:

Inorganic filler content was quantified using the ashing method.
Elemental composition of fillers was identified via X-ray microanalysis.
Radiopacity was measured using transmission photodensitometry and expressed as aluminum (Al) equivalent thickness.

Main Results:

Inorganic filler content varied significantly, from 0.0 wt% to 43.5 wt%.
Silicon and aluminum were common filler elements; one agent contained B, Si, Sr, Na, F, and Al.
Fourteen of fifteen bonding agents had radiopacity below dentin; one agent (S-PRG-filled) was equal to or greater than dentin but less than enamel.

Conclusions:

Bonding agent radiopacity is directly influenced by filler content.
The presence of heavier elements within the filler significantly enhances radiopacity.
One novel bonding agent exhibits superior radiopacity compared to conventional agents, aiding radiographic assessment.