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Creating tight proximal contacts for MOD resin composite restorations.

M H Saber1, W El-Badrawy, B A C Loomans

  • 1Herman Ostrow School of Dentistry, USC, Los Angeles, CA, USA.

Operative Dentistry
|July 12, 2011
PubMed
Summary

Using both sectional matrices and separation rings before resin composite placement in MOD cavities significantly improves proximal contact tightness. This technique enhances restoration quality for better dental outcomes.

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Area of Science:

  • Restorative Dentistry
  • Dental Materials Science
  • Biomaterials Engineering

Background:

  • Achieving adequate proximal contact tightness (PCT) is crucial for successful MOD resin composite restorations.
  • Suboptimal contacts can lead to issues like food impaction, plaque accumulation, and secondary caries.
  • Various matricing systems aim to optimize PCT, but their comparative effectiveness requires further investigation.

Purpose of the Study:

  • To compare the proximal contact tightness (PCT) of MOD resin composite restorations.
  • To evaluate the influence of different matricing protocols on PCT.
  • To determine the optimal matricing technique for achieving tight proximal contacts in MOD cavities.

Main Methods:

  • Forty-five ivorine molars with standardized MOD cavities were used.

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  • Three groups were established: Group 1 (sectional matrix, wedge, single ring), Group 2 (sectional matrix, wedge, dual rings), and Group 3 (Walser matrix).
  • PCT was measured using a tooth pressure meter, and data were analyzed using ANOVA and Tukey's post hoc test.

    • Main Results:

    • Group 2 (dual rings) demonstrated significantly tighter mesial and distal contacts compared to Group 1 and Group 3 (p<0.05).
    • No significant difference in mesial contact tightness was observed between Group 1 and Group 3 (p=0.993).
    • Distal contacts in Group 1 were significantly tighter than in Group 3 (p<0.001).

    Conclusions:

    • Applying sectional matrices and separation rings to both proximal surfaces before resin composite placement in MOD cavities yields tighter contacts.
    • The dual-ring technique (Group 2) appears most effective for achieving optimal PCT.
    • This finding has clinical implications for improving the quality of posterior composite restorations.