Influence of different conditioning methods on immediate and delayed dentin sealing

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Evaluating dentin sealing effectiveness is crucial for long-term restoration success.
• Understanding how surface conditioning impacts dentin bond strength is essential for clinical application.

Purpose of the Study:

• To assess the shear bond strength and surface characteristics of dentin after immediate and delayed sealing.
• To compare the effects of various surface conditioning methods on dentin sealing.

Main Methods:

• 96 premolars were divided into immediate and delayed sealing groups.
• Conditioning methods included polishing, and airborne-particle abrasion with silicoated aluminum oxide, glycin, or calcium carbonate.
• Shear bond strength, optical inspection, and 3D surface analysis were performed.

Main Results:

• Delayed sealing resulted in significantly higher bond strengths compared to immediate sealing.
• Polishing yielded the highest bond strengths, while calcium carbonate abrasion yielded the lowest.
• Airborne-particle abrasion with silicoated aluminum oxide caused significant surface alterations.

Conclusions:

• Polishing and specific airborne-particle abrasion techniques (silicoated aluminum oxide, glycin) are effective for conditioning dentin surfaces.
• Immediate dentin sealing exhibits lower bond strengths than delayed sealing.
• Airborne-particle abrasion with silicoated aluminum oxide significantly alters dentin surfaces.