Examination of caries-affected dentin and composite-resin interface after different caries removal methods: A...

Area of Science:

• Dental Materials Science
• Cariology
• Restorative Dentistry

Background:

• Caries removal methods impact the integrity of the dentin-composite interface.
• Evaluating novel caries removal techniques is crucial for optimizing restorative outcomes.

Purpose of the Study:

• To compare the effectiveness of different caries removal methods on dentin-composite interface quality using SEM.
• To assess hybrid layer thickness and internal gap formation after Atraumatic Restorative Treatment (ART), Rotary Instrument (RI), Photo-Ablation, and Enzymatic Gel (Brix 3000®) methods.

Main Methods:

• Human molars with caries were treated using ART, RI, Photo-Ablation, or Enzymatic Gel.
• Cavities were restored, and specimens were analyzed via SEM for hybrid layer (HL) thickness and micro-CT for internal gaps.
• Statistical analysis included ANOVA and Dunnett's t-tests.

Main Results:

• Photo-Ablation yielded the highest HL thickness and lowest internal gaps.
• Enzymatic Gel showed the lowest HL thickness but preserved dental tissue.
• Rotary Instrumentation resulted in the highest internal gaps and non-uniform HL formation.

Conclusions:

• Photo-ablation is a highly effective caries removal method, promoting superior hybrid layer formation.
• Enzymatic gel and ART are conservative alternatives to rotary instrumentation, preserving more tooth structure.
• Rotary instrumentation may compromise the integrity of the dentin-restorative interface.