A standardized method for determination of crown margin fidelity

Area of Science:

• Dental Prosthodontics
• Biomaterials Science
• Oral Microbiology

Background:

• Crown margin fidelity is crucial for prosthetic success and gingival health.
• Existing measurement methods for crown margins lack standardization and biological relevance.
• Plaque accumulation and the oral microbiome are significantly influenced by crown margin integrity.

Purpose of the Study:

• To review and critically analyze existing methods for measuring crown margin fidelity.
• To introduce a standardized, biologically oriented method for determining crown margin fidelity.
• To assess factors impacting plaque accumulation and the microbiologic environment around dental crowns.

Main Methods:

• A comprehensive review of prior research on crown margin fidelity measurement.
• Development and application of a standardized measurement protocol.
• Sectioning of cemented crown samples (buccolingual and mesiodistal) and photographic analysis with emergence profile overlays.
• Measurement of vertical and horizontal marginal discrepancies by three independent observers across seven crown systems.

Main Results:

• The study introduces a novel, standardized method for assessing crown margin fidelity.
• Measurements focused on biologically relevant parameters influencing plaque accumulation and gingival health.
• High interobserver reliability was achieved, with variances of 10 microns (horizontal) and 9 microns (vertical).

Conclusions:

• The proposed standardized method offers a biologically relevant approach to evaluating crown margin fidelity.
• Accurate measurement of marginal discrepancies is essential for preventing plaque accumulation and maintaining gingival health.
• The established method demonstrates high reliability for assessing vertical and horizontal marginal discrepancies in dental crowns.