CClinicalTrials.gg
CompletedNCT01528969Updated Aug 10, 2015Results posted

Effect of Xylitol on Oral Microbiota in Children

A Phase 1/2 interventional study of xylitol and sorbitol in Bacterial Infections, sponsored by Kuwait University. Completed at 1 site in Kuwait. Open to male participants aged 11 Years to 14 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-08-10.

Sponsored by Kuwait University · Phase 1/2, Interventional, and Treatment

Phase
Phase 1/2
Study type
Interventional
Enrollment
122
Allocation
Randomized
Ages
11 Years to 14 Years
Sex
Male
01

Study summary

  1. The present controlled, randomized, doubleblind study aims to answer the following questions:

    • How will the "normal flora" be affected by the xylitol consumption?
    • Will daily consumption of xylitol change the plaque-saliva distribution of the mutans streptococci?
    • The association of the test results will also be compared with the caries status at the baseline.
  2. About eighty subjects with MS counts of log CFU 5 or more will be identified and invited to the study. They will be randomly divided into a Xylitol and Sorbitol group.
  3. Xylitol/Sorbitol gum (6g polyol/day) will be used for 5 weeks. Saliva samples will be collected before and after gum use.
  4. Studying and quantifying of 16 bacterial species belonging to the normal flora by DNA-DNA hybridizations and Real-time PCR will show how xylitol influenced the oral flora in general.
Read the detailed description

Xylitol, a 5-carbon polyol, has in clinical studies prevented caries occurrence in children and decreased counts of mutans streptococci (MS) and the amount of plaque when used on daily basis. How xylitol influences mutans streptococci is far from clear. Also the effects of xylitol on the normal flora are poorly understood.

The present controlled, randomized, doubleblind study aims to answer the following questions:

  1. How will the "normal flora" be affected by the xylitol consumption?
  2. Will daily consumption of xylitol change the plaque-saliva distribution of the mutans streptococci?
  3. The association of the test results will also be compared with the caries status at the baseline.

After collecting informed consent forms from the parents, about 177 children will be screened for the presence of salivary mutans streptococci (SM) with chairside test, Dentocult SM® Strip mutans (Orion Diagnostica, Finland).

Sorbitol is regarded as an inert polyol. Xylitol/Sorbitol gum (6g polyol/day) will be used for 5 weeks. Saliva samples will be collected before and after gum use. Studying and quantifying of 16 bacterial species belonging to the normal flora by DNA-DNA hybridizations and Real-time PCR will show how xylitol influenced the oral flora in general. Comparison of MS counts in unstimulated vs. stimulated saliva will show how xylitol affected the adhesivity of the MS.

02

Conditions studied

  • Bacterial Infections

Browse trials for

Keywords

  • oral microbiota
  • mutans streptococci
  • xylitol
03

In context

Bacterial Infections

658 studies on the registry are indexed under Bacterial Infections; 100 are open to participants now.

This study's enrollment of 122 is above the median of 84 across 405 interventional studies indexed under Bacterial Infections.

Browse Bacterial Infections studies →

Lead sponsor

Kuwait University is the lead sponsor of 13 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
11 Years to 14 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Inclusion criteria

  • high SM count

Exclusion criteria

Exclusion Criteria:

  • low SM count,
  • ongoing medication
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
122 participants (actual)

Study arms

  • Experimental
    Xylitol

    A half of the subjects will be randomly allocated into xylitol group.

    Dietary Supplement: xylitol

  • Active comparator
    Sorbitol

    About 40 randomly allocated subjects will chew sorbitol chewing gum (1,5, g/pellet) three times a day

    Dietary Supplement: sorbitol

Interventions

  • Dietary supplementxylitol

    Subjects will chew 2 pieces of xylitol chewing gum (1,5 g/pellet) three times a day in the experimental group for a five-week period.

    Also known as: Xylitol chewing gum, Sorbitol chewing gum

  • Dietary supplementsorbitol

    Subjects will chew 2 pieces of sorbitol chewing gum (1,5 g/pellet) three times a day in the control group for a five-week period.

    Also known as: Sorbitol chewing gum

06

What researchers measure

Primary outcomes

  1. MS Counts of Stimulated Saliva

    The MS counts were measured at the beginning and in the end of the 5 weeks intervention

    Time frame: 5 weeks

Secondary outcomes

  1. The Changes in the Counts of the 14 Other Bacterial Species

    The bacterial species were measured from stimulated saliva at the beginning and after the intervention

    Time frame: 5 weeks

07

Results

Posted Aug 10, 2015

Participant flow

Altogether 122 10-12-year-old boys, whose parents gave a positive consent, participated in the baseline examinations. The study was conducted at one school in Jabriya, Kuwait.

Participant flow — Overall Study
MilestoneXylitolSorbitol
Started3738
Completed3538
Not completed20
Withdrew: Absent from the school at baseline20

Outcome measures

PrimaryMS Counts of Stimulated Saliva

The MS counts were measured at the beginning and in the end of the 5 weeks intervention

Time frame:
5 weeks
Reported as:
Mean · MS counts log CFU/ml
MS Counts of Stimulated Saliva
MS counts log CFU/mlXylitolSorbitol
Baseline4.86 ± 1.344.40 ± 1.71
5-week follow-up4.29 ± 1.733.78 ± 1.83
SecondaryThe Changes in the Counts of the 14 Other Bacterial Species

The bacterial species were measured from stimulated saliva at the beginning and after the intervention

Time frame:
5 weeks

Results for this outcome have not been posted.

Adverse events

Collected over during the 1st week after the intervention was concluded.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Xylitol—0/35 (0%)0/35 (0%)
Sorbitol—0/38 (0%)0/38 (0%)
Most frequent other events
Most frequent other events
EventXylitolSorbitol
DiarrheaGastrointestinal disorders0/350/38

Baseline characteristics

Age, Continuous
Age, Continuous(years)XylitolSorbitolTotal
Mean11.5 (10 to 12)11.5 (10 to 12)11.5 (10 to 12)
Sex: Female, Male
Sex: Female, Male(Participants)XylitolSorbitolTotal
Female000
Male373875
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)XylitolSorbitolTotal
Hispanic or Latino000
Not Hispanic or Latino373875
Unknown or Not Reported000
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)XylitolSorbitolTotal
Hispanic or Latino000
Not Hispanic or Latino373875
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(participants)XylitolSorbitolTotal
Kuwait373875
Nationality of subjects
Nationality of subjects(participants)XylitolSorbitolTotal
Kuwaiti363773
non-Kuwaiti Arab112
08

Study locations

1 site
  • Faculty of Dentistry, Kuwait University
    Kuwait, Kuwait
09

References and documents

Publications

  • Honkala E, Honkala S, Shyama M, Al-Mutawa SA. Field trial on caries prevention with xylitol candies among disabled school students. Caries Res. 2006;40(6):508-13. doi: 10.1159/000095650. PubMed 17063022 ↗
  • Honkala E, Rimpela A, Karvonen S, Rimpela M. Chewing of xylitol gum--a well adopted practice among finnish adolescents. Caries Res. 1996;30(1):34-9. doi: 10.1159/000262134. PubMed 8850581 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 10, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01528969
Lead sponsor
Kuwait University
Collaborators
University of Turku, University of Michigan
Responsible party
Eino Honkala (Professor, Kuwait University) — Principal investigator
First posted
Feb 8, 2012
Start date
Mar 2012
Primary completion
Apr 2012
Completion
May 2012
Results posted
Aug 10, 2015
Last update
Aug 10, 2015

Study contacts

Eino Honkala, PhD
principal investigator · Faculty of Dentistry, Kuwait University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2015. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion