The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been endorsed by the ANZCTR. Before participating in a study, talk to your health care provider and refer to this information for consumers
Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Type of registration
Prospectively registered

Titles & IDs
Public title
Implementing a Minimal Intervention Dentistry Clinical Protocol for adolescent public dental patients at high risk of dental caries: a pilot study.
Scientific title
In adolescent public dental patients at high risk of dental caries, does a minimal intervention dentistry clinical protocol change caries risk assessment when compared to standard care?
Secondary ID [1] 252757 0
Universal Trial Number (UTN)
Trial acronym
MID-APP (Minimal Intervention Dentistry Adolescent Pilot Project)
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Dental caries 258259 0
Condition category
Condition code
Public Health 258449 258449 0 0
Health service research
Oral and Gastrointestinal 258450 258450 0 0
Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon

Study type
Description of intervention(s) / exposure
Arm 1 - Control Arm - Standard course of dental care

Arm 2 - Test Arm - will have all four principles of Minimal Intervention Dentistry (MID) approach for the management of dental caries implemented by the community clinic oral health practitioners, namely:
1. prevention and early intervention to control the disease. Patients’ caries risk level will be identified as outlined by Evans et al (2008) and a treatment plan based on the caries risk assessment will be developed and implemented. A dental therapist will undertake motivational interviews with the patients to promote self management of dental caries including oral hygiene instruction, dietary habits, the importance of saliva, the role of fluoride and antibacterial therapies.
2. Remineralisation and ongoing monitoring of non-cavitated active lesions including preventive and re-mineralization procedures, application of fluoride varnish and bioavailable calcium phosphate agents, and application of fissure sealants. In addition, patients will be provided with oral health care products for home care as required.
3. Any carious lesion becoming cavitated or progressing into the outer third of the dentine (based on the bitewing radiographs) will be restored by the dental therapist/s employed by the community dental clinic using adhesive and biomimetic restorative materials according to the protocol for the management of carious lesions devised by Jenson et al (2008).
4. Where appropriate, failed restorations will be repaired rather than being replaced by the dental therapists/s employed by the community dental clinic with the use of minimal cavity designs and adhesive and biomimetic restorative materials.
The overall duration of the intervention is 12 months with review appointments at 3 months, 6 months and 12 months.
Intervention code [1] 257284 0
Intervention code [2] 257397 0
Treatment: Other
Comparator / control treatment
Patients identified to be at risk to dental careis are examined, provided with dental treatment as required and are reviewed every 12 months as the standard course of dental care.
Control group

Primary outcome [1] 259296 0
Primary Outcome 1: Change in caries risk assessment. A Caries Risk Assessment tool based on the literature has been developed for this project which include disease indicators, biological predisposing factors and protective factors. Three caries management by risk assessment catagories have been identified: 1. Low risk, moderate risk and high risk.
Timepoint [1] 259296 0
Timepoint: at baseline, 3, 6 and 12 months after intervention commencement.
Secondary outcome [1] 265723 0
Secondary outcome: identify barriers within a community dental setting to the implementation of an MID clinical protocol for the magagement of adolescent public dental patients at high risk to dental caries. The assessment will include semi-structured interviews with the clinicians involved in the MID-APP Pilot Project at the completion of the project in 12 months.
Timepoint [1] 265723 0
Timepoint: at 12 months after intervention commencement.

Key inclusion criteria
Inclusion criteria for this study include:
1. Adolescent patients (13-18 years) who hold a concession card or are dependents of a concession card holder.
2. Adolescent patients assessed as being at high risk to developing dental caries.
3. Adolescent patients attending 12-month high-risk recall visit at the Western Region Health Centre Dental clinic.
Minimum age
13 Years
Maximum age
18 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Exclusion criteria for this study include:
1. Methamphetamine users and drug addicted patients
2. Patients with severe salivary gland hypofunction
3. Patients with medical or physical conditions that may, in the opinion of the investigators, compromise the study outcome e.g. requiring anticoagulant therapy; diagnosed intellectual, physical or mental health disability; conditions requiring chemotherapy or radiotherapy.

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
After assessing the eligibility of the participants, obtaining consent and collecting baseline data, subjects will be randomly allocated to treatment groups. Treatment allocation will be concealed with treatments being assigned by opening sequentially numbered opaque envelopes. The treating dentist will be required to sign and date the randomization log as each envelop is opened.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
A computer generated block randomization schedule using random blocks. The random allocation sequence will be contained within opaque envelopes with numerical sequencing corresponding to the order in which subjects are recruited into the trial.
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?

Intervention assignment
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Not yet recruiting
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)

Funding & Sponsors
Funding source category [1] 257721 0
Government body
Name [1] 257721 0
Dental Health Services Victoria
Address [1] 257721 0
Corporate Office
GPO Box 1273L
Melbourne VIC 3001

720 Swanston Street
Carlton VIC 3053
Country [1] 257721 0
Primary sponsor type
Government body
Dental Health Services Victoria
Corporate Office
GPO 1273L Melbourne
Melbourne VIC 3001

720 Swanston Street
Carlton VIC 3053
Secondary sponsor category [1] 256937 0
Name [1] 256937 0
The University of Melbourne, Melbourne Dental School
Address [1] 256937 0
720 Swanston Street
Carlton VIC 3053
Country [1] 256937 0
Secondary sponsor category [2] 257038 0
Commercial sector/Industry
Name [2] 257038 0
Colgate-Palmolive Ltd.,
Address [2] 257038 0
Level 4
345 Geroge Street Sydney
NSW 2000
Country [2] 257038 0
Other collaborator category [1] 251531 0
Commercial sector/Industry
Name [1] 251531 0
GC Asia Dental PTE Ltd
Address [1] 251531 0
Changi International Logistics Centre
19 Loyang Way, #06-27
Country [1] 251531 0

Ethics approval
Ethics application status
Ethics committee name [1] 259769 0
Dental Health Services Victoria Human Research Ethics Committee.
Ethics committee address [1] 259769 0
Corporate Office
GPO 1273L
Melbourne VIC 3001

720 Swanston Street
Carlton VIC 3053
Ethics committee country [1] 259769 0
Date submitted for ethics approval [1] 259769 0
Approval date [1] 259769 0
Ethics approval number [1] 259769 0

Brief summary
Dental caries (tooth decay) is the second most costly diet-related disease in Australia. Its economic impact is comparable with that of heart disease and diabetes with an increasing total expenditure for dental services from $4.4 billion per annum (6.1 % of total health expenditure) in 2001 to more than $5.3 billion per annum (10% of total health expenditure across Australia) in 2007. Research has demonstrated that placing dental fillings does nothing to manage the dental caries disease process. Minimal Intervention Dentistry (MID) is a multi-pronged approach which focuses on the management of dental caries as a diet related, transmissible, infectious disease. It comprises measures that range from prevention, early intervention, and treatment. The proposed research will be undertaken with a group of adolescent public dental patients (concession-card holders). The current direct-service delivery model does not place specific emphasis on the management of dental caries through caries risk assessment, prevention or early intervention. The overall goal of this project is to undertake a pilot study to test the impact on caries-risk status of implementing a MID clinical protocol to a group of adolescent public dental patients (aged 13-18 years) who are at high risk to dental caries.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 31690 0
Address 31690 0
Country 31690 0
Phone 31690 0
Fax 31690 0
Email 31690 0
Contact person for public queries
Name 14937 0
Su-yan Barrow
Address 14937 0
Dental Health Services Victoria
GPO Box 1273L
Melbourne VIC 3001

720 Swanston Street
Carlton VIC 3053
Country 14937 0
Phone 14937 0
+61 3 9341 1393
Fax 14937 0
+61 3 9341 1234
Email 14937 0
Contact person for scientific queries
Name 5865 0
Dr. Hanny Calache
Address 5865 0
Dental Health Services Victoria
GPO Box 1273L
Melbourne VIC 3001

720 Swanston Street
Carlton VIC 3053
Country 5865 0
Phone 5865 0
+61 3 9341 1291
Fax 5865 0
+61 3 9341 1234
Email 5865 0

No information has been provided regarding IPD availability
Summary results
No Results