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

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Conditions studied: Dental Plaque Accumulation, Oral Hygiene, Oral Health, Dental Materials, Dental Plaque Imaging Methods, Dental Plaque Index

In brief

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.

Key facts

Study ID

NCT07421687

Run by

Trakya University

People needed

45

Starts

2026-03-16

Expected to finish

2027-03-24

Last updated by the study team

2026-02-23

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 18 years or older. 
• Able and willing to provide written informed consent. 
• Generally healthy and not using regular systemic medications. 
• Have at least 6 teeth in each quadrant of the mouth. 
• Have low plaque levels at baseline (plaque index <10%). 
• Do not have periodontal pockets deeper than 4 mm. 
• In the upper front teeth (maxillary anterior) on the outer (vestibular) surfaces, participants must fit one of these predefined surface types: Natural tooth surface (no restoration ), direct composite restoration, or Indirect ceramic veneer restoration. 
• No cavitated tooth decay on the surfaces to be assessed and no obvious surface defects that would clearly increase plaque retention.

You may not qualify if…

• Diagnosis of gingivitis or periodontitis. 
• Regular use of mouthwash as part of daily oral hygiene. 
• Use of antibiotics within the last 6 months. 
• Smoking. 
• Pregnant or breastfeeding. 
• Presence of dental implants or removable dentures. 
• Any systemic disease or medical treatment that could affect oral health or healing (examples include diabetes, cancer, disorders affecting bone metabolism, immunosuppressive therapy, chemotherapy, radiotherapy, or other conditions/medications affecting wound healing). 
• Having a pacemaker or an implantable defibrillator. 
• History of allergy or intolerance to study-related materials (e.g., ingredients of the plaque-disclosing agent or the lip/cheek retractor material). 
• Defective fillings/restorations on the assessed surfaces that could increase plaque retention. 
• Malocclusion or spacing between teeth (diastema). 
• Gum recession affecting more than one-third of the root length. 
• Wearing fixed orthodontic appliances (braces). 
• Any physical, mental, or psychiatric condition that could interfere with understanding the study or completing the procedures

Where it is running

• Trakya University — Merkez, Edirne, Turkey (Türkiye)

Full record on ClinicalTrials.gov

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