Deze pagina is automatisch vertaald en de nauwkeurigheid van de vertaling kan niet worden gegarandeerd. Raadpleeg de Engelse versie voor een brontekst.

Breaking the Cycle: Real-Time Family Oral Microbial Transmission Patterns as Intervention Targets

25 juni 2026 bijgewerkt door: University of Alberta

This study aims to understand how oral bacteria that cause tooth decay and gum disease spread among family members and whether treating multiple family members can reduce the return of these bacteria after dental treatment.

Families with children aged 5-12 years will be recruited from university dental clinics. Participants will be assigned to one of three treatment groups: treatment for the child only, treatment for the child and parents, or treatment for all family members. Researchers will collect oral bacterial samples from family members before and after treatment and will monitor close-contact interactions within the household using wearable proximity-tracking devices.

The study will also collect information about oral health habits, family interactions, and environmental factors that may influence bacterial transmission. By combining bacterial DNA analysis with information about family contact patterns, researchers hope to better understand how oral bacteria are shared within households and whether family-based treatment approaches can reduce bacterial recolonization after dental therapy.

The results of this study may help improve strategies for preventing childhood tooth decay and gum disease by addressing family-level sources of bacterial transmission.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Oral diseases, including dental caries and periodontal diseases, are among the most prevalent chronic diseases worldwide. Although oral pathogens are known to be transmissible, the mechanisms by which disease-associated bacteria spread within families and contribute to recolonization after treatment remain poorly understood.

This randomized clinical trial will investigate familial oral microbial transmission and the role of household-level interventions in modifying microbial recolonization following professional dental therapy. Forty-five families will be recruited from university dental clinics and randomized into one of three intervention groups: (A) child-only plaque disruption, (B) child plus parent plaque disruption, or (C) plaque disruption for all family members. Eligible households must include at least two children aged 5-12 years and at least one adult requiring periodontal therapy or a child at high risk of disease recurrence.

Oral microbial samples will be collected from all participating family members at multiple oral sites, including saliva, buccal mucosa, tongue, supragingival plaque, and subgingival plaque. Follow-up sampling will occur at 1 week, 4-6 weeks, and 3 months after treatment. Participants will complete oral health and demographic questionnaires, and all family members will wear Ultrawide Band (UWB) proximity-tracking devices to quantify real-time interpersonal contact patterns within the household. Airborne microbial sampling will also be performed to investigate potential aerosol-mediated transmission pathways.

Bacterial DNA sequencing, source-tracking algorithms, and quantitative PCR analyses will be used to identify sources of microbial recolonization and quantify transmission among family members. Generalized Linear Mixed Models will be used to examine associations between microbial transmission, proximity measures, demographic variables, and household characteristics.

The primary objective is to determine whether reducing familial pathogen burden through household-level treatment decreases recolonization of oral pathogens following dental therapy. Secondary objectives include characterizing contact-dependent and airborne transmission pathways and identifying factors associated with oral microbial transmission within families.

Studietype

Ingrijpend

Inschrijving (Geschat)

225

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Canada
    • Alberta
      • Edmonton, Alberta, Canada, T6G2L7
        • Kaye Edmonton Clinic - University of Alberta School of Dentistry
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Kind

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Families with at least two children aged 5-12 years living in the same household.
  • least one parent or guardian diagnosed with Stage II or III periodontitis requiring non-surgical periodontal therapy.
  • At least one child who has undergone caries treatment and is considered at high risk for disease recurrence.
  • Willingness of all participating household members to provide oral samples and participate in study procedures.
  • Ability of participants or their legal guardians to provide informed consent, and assent from children where applicable.

Exclusion Criteria:

  • Children living in multiple households or shared-custody arrangements during the study period.
  • Households unable to complete study visits or follow-up procedures.
  • Individuals unwilling or unable to comply with study procedures.
  • Individuals who do not provide informed consent or assent, where applicable.
  • Medical or behavioral conditions that, in the opinion of the investigators, would preclude safe participation in the study.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Preventie
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Child-Only Treatment
The primary child participant receives professional dental plaque disruption and oral hygiene intervention. Other household members do not receive study-related treatment.
Procedure: Professional Dental Plaque Disruption
Professional dental plaque disruption and oral hygiene treatment performed to reduce oral bacterial burden. The intervention may include professional dental cleaning, plaque removal, and periodontal therapy as clinically indicated according to study group assignment.
Experimenteel: Child Plus Parents Treatment
The primary child participant and both parents receive professional dental plaque disruption and oral hygiene intervention
Procedure: Professional Dental Plaque Disruption
Professional dental plaque disruption and oral hygiene treatment performed to reduce oral bacterial burden. The intervention may include professional dental cleaning, plaque removal, and periodontal therapy as clinically indicated according to study group assignment.
Experimenteel: Whole-Family Treatment
All participating household members receive professional dental plaque disruption and oral hygiene intervention using a family-wide treatment approach.
Procedure: Professional Dental Plaque Disruption
Professional dental plaque disruption and oral hygiene treatment performed to reduce oral bacterial burden. The intervention may include professional dental cleaning, plaque removal, and periodontal therapy as clinically indicated according to study group assignment.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Proportional Contribution of Familial Sources to Oral Microbial Recolonization
Tijdsspanne: 3 Months
Percentage contribution (%) of each household member to the primary child's post-treatment oral microbial recolonization, estimated using bacterial DNA sequencing and Bayesian microbial source-tracking (STENSL).
3 Months

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Oral Microbial Community Reconstitution
Tijdsspanne: Baseline to 3 Months
Oral microbial community reconstitution assessed by relative abundance (%) of oral bacterial taxa and microbial alpha diversity of the oral microbiota, measured using 16S rRNA gene sequencing.
Baseline to 3 Months
Frequency of Close-Contact Interactions Measured using Ultrawide Band (UWB)
Tijdsspanne: 1 Week
Number of close-contact interactions (count) between household members measured using wearable Ultrawide Band (UWB) proximity sensors.
1 Week
Correlation Between Close-Contact Duration and Familial Contribution to Oral Microbial Recolonization
Tijdsspanne: Baseline to 3 Months
Correlation between cumulative close-contact duration (minutes), measured using wearable Ultrawide Band (UWB) proximity sensors, and the proportional contribution (%) of each family member to the primary child's oral microbial recolonization, estimated from bacterial DNA sequencing data using the Bayesian microbial source-tracking algorithm (STENSL).
Baseline to 3 Months

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

University of Alberta

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

30 september 2026

Primaire voltooiing (Geschat)

30 maart 2028

Studie voltooiing (Geschat)

30 juni 2028

Studieregistratiedata

Eerst ingediend

22 juni 2026

Eerst ingediend dat voldeed aan de QC-criteria

25 juni 2026

Eerst geplaatst (Werkelijk)

30 juni 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

30 juni 2026

Laatste update ingediend die voldeed aan QC-criteria

25 juni 2026

Laatst geverifieerd

1 juni 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • Pro00164902

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

ONBESLIST

Beschrijving IPD-plan

A decision regarding sharing of individual participant data (IPD) has not yet been made. Data sharing plans will be determined in accordance with University of Alberta policies, participant consent, and applicable ethics requirements.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

Abonneren