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Updated: Jun 24, 2026

Semi-Automated Planimetric Quantification of Dental Plaque Using an Intraoral Fluorescence Camera
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Semi-Automated Planimetric Quantification of Dental Plaque Using an Intraoral Fluorescence Camera

Published on: January 27, 2023

The Modified Gingival Margin Plaque Index: a predictable clinical method.

V M Barnes1, M Vandeven, R Richter

  • 1Colgate-Palmolive Technology Center, Piscataway, NJ, USA. Virginia_Barnes@colpal.com

The Journal of Clinical Dentistry
|March 13, 2009
PubMed
Summary
This summary is machine-generated.

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The Modified Gingival Margin Plaque Index (MGMPI) reliably detects differences in antiplaque efficacy between toothpastes. This plaque index method proved consistent and predictable in clinical trials.

Area of Science:

  • Dental hygiene research
  • Clinical trial methodology
  • Oral health product efficacy

Background:

  • Assessing antiplaque efficacy is crucial for dental product development.
  • The Modified Gingival Margin Plaque Index (MGMPI) is a method for evaluating plaque accumulation.
  • Standardized methods are needed to compare the effectiveness of different oral hygiene products.

Purpose of the Study:

  • To evaluate the consistency and statistical power of the Modified Gingival Margin Plaque Index (MGMPI) in detecting differences in antiplaque efficacy.
  • To determine if MGMPI can reliably differentiate between an antiplaque toothpaste and a regular fluoride toothpaste.

Main Methods:

  • Analysis of data from 28 clinical studies utilizing the MGMPI.
  • Comparison of plaque scores using MGMPI between Colgate Total (antiplaque) and Colgate Cavity Protection (fluoride) toothpastes.

Related Experiment Videos

Last Updated: Jun 24, 2026

Semi-Automated Planimetric Quantification of Dental Plaque Using an Intraoral Fluorescence Camera
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Semi-Automated Planimetric Quantification of Dental Plaque Using an Intraoral Fluorescence Camera

Published on: January 27, 2023

  • Calculation of delta scores (24-hour minus baseline) to assess plaque reduction.

    • Main Results:

    • The MGMPI consistently showed lower delta scores for Colgate Total compared to Colgate Cavity Protection.
    • A statistically significant difference in antiplaque efficacy was detected by MGMPI in 82% (23 out of 28) of the studies.
    • Study sample size (9-19 subjects) influenced the statistical power to detect differences.

    Conclusions:

    • The MGMPI is a consistent and predictable tool for clinical trials assessing antiplaque efficacy.
    • The method offers convenience for both examiners and study participants.
    • Study design, particularly sample size, is critical for achieving statistical power in detecting efficacy differences.