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Related Experiment Videos

Visual and profilometric wear measurements.

K J Söderholm1, M J Roberts, D E Antonson

  • 1Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville.

Acta Odontologica Scandinavica
|April 1, 1992
PubMed
Summary
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Visual assessment of composite wear on stone casts may underestimate actual wear depth. This study found that dentists

Area of Science:

  • Materials Science
  • Dental Materials Science

Background:

  • Assessing wear of dental composites is crucial for understanding restoration longevity.
  • Marginal discrepancy is a key indicator of composite wear, evaluated by comparing restorations to standard casts.
  • Current methods rely on visual comparison of marginal discrepancies on dental casts.

Purpose of the Study:

  • To analyze the reliability of visual estimation of marginal discrepancy for composite wear assessment.
  • To compare visual estimations with objective measurements using a profilometer.
  • To evaluate the consistency of estimations across different dentists and over time.

Main Methods:

  • Metal and stone specimens with standardized grooves of varying depths were used.
  • Groove depths were objectively measured using a profilometer.

Related Experiment Videos

  • Five dentists visually estimated groove depths on stone casts of the specimens under standardized, repeated conditions.

    • Main Results:

    • Visual depth estimations on stone casts consistently underestimated the actual groove depths measured by profilometer.
    • One investigator showed statistically significant variations (p < 0.05) in depth estimations across different assessment occasions.
    • The reliability of visual assessment for composite wear may be compromised by underestimation and inter-examiner variability.

    Conclusions:

    • Visual assessment of composite wear via marginal discrepancy on stone casts is prone to underestimation.
    • The technique's reliability is questionable due to systematic underestimation and potential for inconsistent individual assessments.
    • Further research into more objective and reliable methods for quantifying composite wear is warranted.