3D Volumetric Plaque Assessment on Teeth, Composite Restorations, and Ceramic Veneers Using an Intraoral Scanner

Condition(s) studied

Investigational drug(s) / intervention(s)

Intraoral scanning (TRIOS 3) with plaque disclosure assessment: Whole-arch intraoral scans were obtained with the TRIOS 3 intraoral scanner to generate 3D digital models for plaque/biofilm assessment. Scans are performed at standardized time points, including after plaque accumulation and after plaque disclosure, to document plaque distribution and enable computer-assisted quantification and 3D mapping.

Conventional plaque scoring (TMQHPI) after plaque disclosure: Clinical plaque assessment using the Turesky modified Quigley-Hein Plaque Index performed after plaque disclosure by a calibrated examiner.

Study summary

The goal of this observational study is to evaluate and compare a 3D intraoral scanner-based, computer-assisted approach for assessing dental biofilm/plaque accumulation on natural teeth and restorative surfaces with a conventional clinical plaque index (Turesky modified Quigley-Hein Plaque Index, TMQHPI) in systemically healthy adults. The main questions it aims to answer are:

* How well does the plaque-covered surface measurement derived from 3D intraoral scanner data agree with TMQHPI scores after plaque disclosure?
* How sensitively do the two methods detect changes in plaque levels after supervised toothbrushing?
* Do plaque accumulation patterns differ between natural tooth surfaces and restorative materials (direct composite restorations and indirect ceramic veneers), and where are plaque-retentive areas most frequently located?

Participants (≥18 years) will receive routine professional mechanical plaque removal as part of standard clinical care. They will then be asked to avoid mechanical and/or chemical plaque control for 4 days. At the follow-up visit, participants will undergo:

1. An intraoral scan and standardized photographs of the full dental arch,
2. Plaque disclosure followed by repeat scanning/photography and TMQHPI scoring by a periodontist,
3. Supervised toothbrushing using the modified Bass technique for 2 minutes, followed by a final scan and photographs. Digital models will be used to quantify plaque-covered surface measures and to generate 3D maps of plaque-retentive areas.

Eligibility

Primary outcome measure(s)

• Agreement Between Intraoral Scanner-Derived Plaque-Covered Surface Measures and TMQHPI Scores After Plaque Disclosure — Day 4 (after 4-day plaque accumulation), after plaque disclosure (same visit).
  Agreement/concordance between plaque-covered surface measurements obtained from TRIOS 3® intraoral scan-based 3D analysis after plaque disclosure and conventional clinical plaque scoring using the Turesky modified Quigley-Hein Plaque Index (TMQHPI) assessed by a calibrated examiner at the same visit.

Trial sites (1)

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