Condition category
Oral Health
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
The aim of the study is to see how well tooth decay in elderly patients can be treated using a dental material (containing Chlorhexidine, which is commonly found in mouthwashes) when applied using a simple and painless method called Atraumatic Restorative Treatment. This is important because the elderly population are at a high risk of developing cavities (“holes”) in their teeth near the gum surface (called root caries).

Who can participate?
Adults aged 60 years or older, with at least one tooth with root caries that requires treatment.

What does the study involve?
Participants will be seen at a screening assessment to confirm that they are suitable to take part. Participants will then be invited for a treatment visit where photographs, plaque and saliva samples will be taken and the root caries treated with the dental material. Saliva and plaque samples will be collected at 1, 3 and 6 months and photographs taken at 6 months. Questionnaires will be completed at all visits.

What are the possible benefits and risks of participating?
Chlorhexidine is used safely in toothpastes and mouthwashes, so very few side effects are expected. The way the treatment is applied is likely to be simple and painless compared with conventional dental fillings. However additional visits are needed in order to collect plaque and saliva samples.

Where is the study run from?
Leeds Dental Institute’s Dental Translational and Clinical Research Unit (DenTCRU), Leeds, UK

When is the study starting and how long is it expected to run for?
May 2013 - August 2014

Who is funding the study?
Dunhill Medical Trust

Who is the main contact?
Gillian Dukanovic

Trial website

Contact information



Primary contact

Prof Paul Brunton


Contact details

Leeds Dental Institute
Clarendon Way
United Kingdom
+44 113 343 6182

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Atraumatic Restorative Treatment for CARies in the Elderly - A pilot non-randomised study to assess a novel approach for the prevention of root caries



Study hypothesis

The aim of this pilot study is to see how well tooth decay in elderly patients can be treated using a glass ionomer cement (GIC) dental material containing chlorhexidine (CHX) (which is commonly found in mouthwashes) when applied by dental therapists using the simple and painless method, Atraumatic Restorative Treatment (ART).

Ethics approval

NRES Committee Yorkshire & The Humber - Leeds West, 22/02/2013, ref: 13/YH/0010

Study design

Non-randomised interventional treatment trial

Primary study design


Secondary study design

Non randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Topic: Oral and Gastrointestinal; Subtopic: Oral and Gastrointestinal (all Subtopics); Disease: Oral & Dental


GIC modified with chlorhexidine.

GIC with 5% chlorhexidine, applied once and left in place.

Intervention type



Not Applicable

Drug names

Primary outcome measure

Reduction of bacteria in plaque samples; Timepoints: 6 months post treatment

Secondary outcome measures

1. Reduction of bacteria in plaque samples; Timepoints: 1 and 3 months post treatment
2. Reduction of bacteria in saliva samples; Timepoints: 1 and 3 month post treatment
3. Reduction of bacteria in saliva samples; Timepoints: 6 months post treatment
4. Survival rate of restorations; Timepoints: 6 months post treatment
5. Treatment delivery acceptability by dental therapists; Timepoints: Baseine, and at 1, 3 and 6 months post treatment
6. Treatment delivery acceptability by patients; Timepoints: Baseline and at 1, 3 and 6 months post treatment

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Patients will be >=60 yrs (females and males)
2. Patients will have at least one lesion of root caries, which requires operative intervention.
3. Patients who are willingly to provide signed informed consent.
4. Patients who are willing to follow the research schedule for the period of the study.

Participant type


Age group




Target number of participants

UK Sample Size: 34

Participant exclusion criteria

1. Patients with no natural teeth.
2. Patients currently having antibiotic therapy or within 4 weeks of completion of a course of therapy with antibiotics.
3. Patients who are currently receiving or who have had radiotherapy of the head and neck region within the last 12 months.
4. Patients who are currently using or who have used toothpastes and/or mouthwashes containing chlorhexidine within the last 4 weeks.
5. Patients who have active periodontal disease which is likely to require treatment such as root surface debridement (RSD) during the study.
6. Patients who have any condition (including an allergy to chlorhexidine) which could be expected to interfere with the patient’s safety during the study.
7. Patients who demonstrate an inability to comply with study procedures.

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Leeds Dental Institute
United Kingdom

Sponsor information


University of Leeds (UK)

Sponsor details

Faculty Research Office
University of Leeds
Room 10.110
Level 10 Worsley Building
Clarendon Way
United Kingdom

Sponsor type




Funder type


Funder name

Dunhill Medical Trust (UK) Grant Codes: R245/0212

Alternative name(s)


Funding Body Type

private sector organisation

Funding Body Subtype

Other non-profit organizations


United Kingdom

Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

06/01/2017: No publications found in PubMed, verifying study status with principal investigator.