Comparing the effect of small brushes specially designed to clean between teeth on the health of supporting structures of the teeth

ISRCTN ISRCTN24498365
DOI https://doi.org/10.1186/ISRCTN24498365
Secondary identifying numbers 1670/2016
Submission date
18/11/2019
Registration date
20/11/2019
Last edited
05/09/2022
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Oral Health
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
Interdental brushes help to prevent gum disease by getting rid of pieces of food and plaque from between the teeth. They have small bristled heads designed to clean between teeth and come in different widths to suit the sizes of the gaps in the teeth.
The aim of this study is to evaluate the cleaning efficacy of waist-shaped compared to straight soft interdental brushes in patients undergoing non-surgical gum (periodontal) treatment.

Who can participate?
Dental patients aged 35 years or over who require non-surgical periodontal therapy

What does the study involve?
Participants will be asked to use two different styles of interdental brushes to clean in between the teeth in either side of their mouth. They will be instructed to use the same style on the same side of their mouth for the duration of the study (8-weeks). At the start and the end of the study participants will have a full inspection of teeth and gums.

What are the possible benefits and risks of participating?
Benefits: possible improvement in gum health
Risks: None expected

Where is the study run from?
Medical University of Vienna, Austria

When is the study starting and how long is it expected to run for?
February 2017 to February 2018

Who is funding the study?
Medical University of Vienna (Medizinische Universität Wien), Austria

Who is the main contact?
Dr Christian Wehner
christian.wehner@meduniwien.ac.at

Contact information

Mr Christian Wehner
Public

Sensengasse 2a
Vienna
1090
Austria

Phone +43 650 7730390
Email christian.wehner@meduniwien.ac.at

Study information

Study designSplit-mouth randomized controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Other
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleThe influence of different interdental brush designs on the efficacy of plaque removal during non-surgical periodontal treatment: A split‐mouth randomized controlled trial
Study objectivesWaist-shaped interdental brushes yield better cleaning efficacy than straight designed brushes in patients undergoing periodontal therapy.
Ethics approval(s)Approved 27/10/2016, Ethics Committee of the Medical University of Vienna (Borschkegasse 8b/6; A-1090 Vienna, Austria; ethikkommission.meduniwien.ac.at; +43 1 40 400 – 21470), ref: Nr. 1670/2016
Health condition(s) or problem(s) studiedPeriodontal problems
InterventionFollowing inclusion into the study, a periodontal status comprising whole-mouth probing pocket depths (PPD) and bleeding on probing (BOP) assessment, PCR, approximal plaque index (API), papillary bleeding index (PBI), and smoking status were evaluated (time point 1, T1). Patients received supragingival debridement and were instructed not to use further oral hygiene cleaning devices except for electric tooth brush with the same brush head, which has been given to the patients as well as to apply the same toothpaste. Initial periodontal therapy was started at the second visit (T2), and PCR, API, and PBI were assessed again. A blinded examiner determined the Plaque Index (PI) according to Silness & Loe at eight areas of the teeth adjacent to the interdental spaces including the following: buccomesial, buccal, buccodistal, distal, distolingual, lingual, mesiolingual and mesial.

Two interdental brushes of either soft straight or waist-shaped design were randomly allocated to the four sites. With regard to the size of the interdental spaces, the following brushes were applied: straight soft interdental brushes of either 3 mm diameter (red) or 4 mm diameter (blue), or waist-shaped brushes of either 5-3-5 mm diameter (No. 3, white) or 7-4-7 mm diameter (No. 5, red), respectively. Randomization was performed via a online available tool.For each patient, the two brushes were randomly assigned to either the right or the left side with the concordant dental interspaces. For oral hygiene, additionally to an electric toothbrush and tooth paste, patients were instructed only to use the interdental brushes at the previously determined sites. Following this procedure, non-surgical periodontal therapy using curettes and sonic scaler was performed by skilled periodontists with a specialization in periodontology (SH, HH, CW, Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria). Patients were provided with a sufficient number of interdental brushes for home use until the next appointment. To complete periodontal therapy, time point three (T3) was scheduled within two weeks after T2. Reevaluation was performed eight weeks later at the final appointment (T4).
Intervention typeDevice
Pharmaceutical study type(s)
PhaseNot Applicable
Drug / device / biological / vaccine name(s)Interdental brushes
Primary outcome measurePlaque index measured using site-specific plaque index at baseline and 8-weeks
Secondary outcome measures1. Probing pocket depth measured using periodontal probe at baseline and 8-weeks
2. Bleeding on probing measured by visual inspection at baseline and 8-weeks
3. Plaque control record (PCR) measured using visual inspection at baseline and 8-weeks
4. Approximal plaque index (API) measured using visual inspection at baseline and 8-weeks
5. Papillary bleeding index (PBI) measured using visual inspection at baseline and 8-weeks
Overall study start date01/05/2016
Completion date01/09/2018

Eligibility

Participant type(s)Patient
Age groupAdult
SexBoth
Target number of participants10
Total final enrolment10
Key inclusion criteria1. ≥ 35 years of age at time of periodontal therapy start
2. No history of periodontal therapy
3. No physical or mental impairment
4. No medication influencing saliva flow
5. No special dietary restrictions
Key exclusion criteria1. Presented with oral diseases other than periodontal disease
2. Suffered systemic diseases that could influence the outcome of therapy (e.g. uncontrolled diabetes mellitus)
3. Not using an electric toothbrush from the same brand
4. Did not have four interdental spaces eligible for the used interdental brushes
Date of first enrolment01/02/2017
Date of final enrolment01/02/2018

Locations

Countries of recruitment

  • Austria

Study participating centre

Medical University of Vienna
University Clinic of Dentistry
Sensengasse 2a
Vienna
1090
Austria

Sponsor information

Medical University of Vienna
University/education

Spitalgasse 23
Vienna
1090
Austria

Phone +43 (0)1 401600
Email christian.wehner@meduniwien.ac.at
ROR logo "ROR" https://ror.org/05n3x4p02

Funders

Funder type

University/education

Medizinische Universität Wien
Government organisation / Local government
Alternative name(s)
Medical University of Vienna, MediUni Wien
Location
Austria

Results and Publications

Intention to publish date01/02/2020
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryData sharing statement to be made available at a later date
Publication and dissemination planPlanned publication in a high-impact peer-reviewed journal.
IPD sharing planThe current data sharing plans for this study are unknown and will be available at a later date.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/01/2021 28/05/2020 Yes No
Protocol file version 1.2 26/09/2016 05/09/2022 No No

Additional files

ISRCTN24498365_Protocol_v1.2_26Sep2016.pdf

Editorial Notes

05/09/2022: Protocol file uploaded.
28/05/2020: Publication reference and total final enrolment number added.
22/11/2019: Background an study aims were added to the plain English summary
19/11/2019: Trial’s existence confirmed by Ethics Committee of the Medical University of Vienna