Effect of decontamination procedures on marginal and internal adaptation in saliva-contaminated composite resin restorations

Study Overview

  • Title: Effect of decontamination procedures on marginal and internal adaptation in saliva-contaminated composite resin restorations

  • Authors: Eftychia Pappa, DDS, MSc, PhD; Konstantinos Masouras, DDS, MSc, PhD; Vasileios Margaritis, DDS, MSc, PhD; Afrodite Kakaboura, DDS, MSc, PhD

  • Objective: Evaluate the effect of natural saliva contamination on dentin adaptation of composite resin restorations and assess various decontamination techniques.

Methods

  • Sample: 120 human molars and premolars, randomly assigned to 6 treatment groups (n=20).

  • Procedure: 1. Prepared standardized dentin cavities. 2. Applied different surface treatments involving etching, saliva contamination, adhesive application, and curing.

  • Evaluation Metrics:

    • Debonded Margin (%DM): Length of debonded margin relative to cavity perimeter.

    • Maximum Marginal Gap (MMG): Width of the gap in micrometers, assessed under an optical microscope.

Findings

  • Marginal and Internal Adaptation:

    • Saliva contamination negatively impacted adaptation after adhesive application (Groups 4 and 5 showed highest %DM and MMG).

    • Group 1 (control) had the best adaptation.

    • Groups 2, 3, and 6 had similar adaptation levels to Group 1.

    • Adhesive reapplication (Group 6) restored adaptation.%

Discussion

  • Significance of Bond Quality:

    • Moisture control is crucial to maintain restoration longevity.

    • Inadequate isolation leads to microleakage and sensitivity.

    • Saliva contamination before adhesive application did not significantly affect adaptation, indicating the timing of contamination matters.

    • Reapplication of adhesive is the preferred decontamination method post-contamination.

Conclusion

  • Clinical Relevance: Saliva contamination can be managed with proper timing and techniques to maintain optimal adhesive bonding in restorative dentistry.