- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02310308
Effect of a Sugar-Free Chewing Gum Containing Magnolia Bark Extract on Caries Lesions in Healthy Adult Volunteers
Effect of a Sugar-free Chewing Gum Containing Magnolia Bark Extract on the Development of Caries Lesions in Healthy Adult Volunteers: a Randomized Controlled Intervention Trial
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Introduction
Dental caries incidence in adults is similar to that in children and adolescents, but few caries preventive agents have been evaluated for effectiveness in adult populations. Magnolia bark extract (MBE) is a plant extract obtained from the bark of magnolia that has been widely used in traditional Chinese medicine for 2,000 years, Magnolia officinalis has been used for the treatment of acute pain, diarrhea, coughs and urinary problems. The two main constituents of the bark of this medicinal plant are magnolol and honokiol. They are known to possess a variety of pharmacological properties, including therapeutic-related activities central nervous system inhibition anti-inflammatory effects, antimicrobial activity, antioxidative activity and freeradical scavenging activity. Magnolol andhonokiol have also been reported to inhibit the growth of Streptococcus mutans, Streptococcus sobrinus, Porphyromonas gingivalis, Fusobacterium nucleatum, Aggregatibacter actinomycetemcomitans, Capnocytophaga gingivalis and Veillonella disper in vitro and reduce the dental caries values in rats. Consequently, the antimicrobial properties of MBE against cariogenic and plaque bacteria have showed promising results. The effect of chewing gums containing MBE and xylitol on different variables related to caries and gingivitis in a sample of adult volunteers with a high risk for caries will be evaluated. The main result of that double-blind randomized controlled interventional trial will be that chewing gum containing MBE was more effective in reducing plaque acidogenicity, salivary mutans streptococci concentration and gingival bleeding compared to a xylitol and sugar-free chewing gum.
Materials and Methods A two-year, placebo-controlled, double-blind, randomized clinical trial sponsored by Perfetti Van Melle that tests the effects on caries lesions development of daily use of a chewing gum containing Magnolia Bark Extract and xylitol will be conducted.
The trial will take place in the dental clinics located in the dental schools of the University of Sassari and Milan. The study will be approved by the Ethical Committee of the University of Sassari.
Study Population Principal inclusion criteria will be age range (30-55 years) and the presence of at least one cavitated caries lesion, but no more than three. Subjects with systemic disease that interfered with the oral ecosystem will be excluded. The caries criterion will be designed to include participants who are at risk of forming new lesions. Sample size for preliminary screening will be calculated on the basis of previous studies regarding caries prevalence (about 26%) in adults [Campus et al, 2011] and relative odds ratio 2.88 of incidence, as reported in literature [Ito et al, 2011]. Thus, the theoretical sample size for preliminary screening will be set to 1200 subjects.
In order to get statistical comparison results, the number of subjects per group to be included in the analysis will be calculated. Considering a 35% difference among groups to be significant, and a 95% probability of obtaining a significant difference among groups at the 5% level, the resulting number of subjects per group will be set 104.
To ensure an adequate quantity of surfaces at risk, participants will be required to have a minimum of 12 natural teeth.
Treatment The subjects will be randomly assigned to three groups: a Magnolia and Xylitol group (MX group) using a chewing gum containing MBE and xylitol, a Xylitol group (X group) using a chewing gum with the same content of xylitol but free of MBE and finally and a Control group (C group), using a sugar-free chewing gum without MBE and xylitol. Each subject will be instructed to chew 1 or 2 pellets for 5 minutes, 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon). Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day. The daily use of the three different chewing gums will be carried out for 12 months.
Three clinical evaluation for caries diagnosis will be performed: one at baseline, a second at the end of the chewing period (after 12 months from baseline) and a third after 24 months from baseline assessment. A microbiological evaluation for cariogenic bacteria will be performed immediately after the clinical assessments. Mutans streptococci and lactobacilli counts in saliva will be assessed and categorized using the dip-slide technique (CTR bacteria, Ivoclar Vivadent, Germany).
Following a sugar challenge, measures of interdental plaque pH, using pH indicator strips (Spezialindikator, pH range 4.0-7.0; Merck, Darmstadt, Germany), will be performed at 5 different points: at baseline, after 6 months of chewing gum use, after 12 months of chewing gum use, 6 months after the end of chewing gum use (18 months from baseline) and finally 12 months after the end of chewing gum use (24 months from baseline).
Randomization Eligible enrolees will be randomized to either the active or control arms. Randomization will be carried out using a computer-based program. Staff and participants will be blinded to treatment assignment.
Study Outcomes The primary study outcome will be the cumulative D2 or Filled Surface (D2 FS) increment (root and coronal surfaces combined) cumulated from baseline through the two follow-up examinations. In addition to the caries increment, data on participant safety and same risk factors related to caries development will be collected.
Expected results The results of this RCT should bring some clarity to the effectiveness of MBE as a caries preventive agent.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Milan, Italy, I-20121
- WHO CC University of Milan
-
-
Sardinia
-
Sassari, Sardinia, Italy, I-07100
- Department of Surgery, Microsurgery and Medicine Sciences University of Sassari
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
The inclusion criteria for the recruitment of subjects are as follows:
- Age 30-45
- Presence of a minimum of 12 natural teeth
- At least one surface cavitated caries lesion, but no more than three
- Mutans streptococci and Lactobacilli >105 CFU/ml saliva
- Systemically healthy as assessed by a medical questionnaire
- No use of antibiotics or participation in a clinical study in the previous 30 days
- No allergy to any of the ingredients of the study products
- No orthodontic banding or removable prosthesis
- Moderate gingivitis, no current periodontitis (no sites of probing pocket depth ≥5 mm or attachment loss of ≥2 mm, apart from gingival recession).
- Absence of dysfunction of temporo-mandibular joint.
Exclusion Criteria:
- Subjects with a history of GI problems and with systemic disease that interfered with the oral ecosystem were excluded. The caries criterion was designed to include participants who are at risk of forming new lesions.
- In addition, those participants who were already consuming more than three pieces of sugar-free chewing gum a day were excluded.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: xylitol chewing gum
Intervention chewing gum administration Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
Intervention chewing gum Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
Experimental: Xylitol-magnolia chewing gum
Intervention chewing gum administration Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
Intervention chewing gum Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
Placebo Comparator: Control chewing gum
Intervention chewing gum Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
Intervention chewing gum Each subject will be instructed to chew 1 or 2 pellets for 5 min 3 times a day (2 in the morning, 2 after the midday meal and 1 in the afternoon).
Thus, the total daily intake of magnolol and honokiol in MX group will be 11.9 mg/day.
The daily use of the two different chewing gums will be carried out for 12 months.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
International Caries Detection and Assessment System (ICDAS) increment
Time Frame: 24 months
|
cumulative D2 or Filled Surface (D2 FS) increment (root and coronal surfaces combined).
|
24 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Salivary mutants streptococci and lactobacilli counts
Time Frame: 6-12-24 months
|
Mutans streptococci and lactobacilli counts in saliva were assessed
|
6-12-24 months
|
Modification of plaque pH
Time Frame: 6-12-24 months
|
and categorized using the dip-slide technique Interproximal-plaque pH of each subject was evaluated using pH indicator strips, Assessment of plaque pH value in the range of 4.0-7.0.
|
6-12-24 months
|
Collaborators and Investigators
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 1083/L
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Dental Caries
-
Ain Shams UniversityCompletedPulpitis | Caries | Caries,Dental | Reversible Pulpitis | Caries Class I | Caries; DentinEgypt
-
National University of San Marcos, PeruNot yet recruitingPit and Fissure Caries | Caries,Dental | Sealant DentalPeru
-
University of MinnesotaCompletedUsing Motivational Interviewing To Reduce Parental Risk-Related Behaviors For Early Childhood CariesCaries | Caries,DentalUnited States
-
3MUniversity of MichiganActive, not recruiting
-
Hue University of Medicine and PharmacyRecruitingOcclusal Caries | Caries,Dental | Caries; InitialVietnam
-
Rawda Hesham Abd ElAzizRecruitingCaries,Dental | Caries Class IIEgypt
-
The University of Texas Health Science Center,...National Institute of Dental and Craniofacial Research (NIDCR)RecruitingCaries,DentalUnited States
-
Federal University of PelotasRecruiting
-
Kompetansesenteret Tannhelse Midt (TkMidt)Karolinska Institutet; University of Bergen; Norwegian University of Science... and other collaboratorsActive, not recruiting
-
Marmara UniversityCompleted
Clinical Trials on Chewing gum administration
-
Denver Nephrologists, P.C.CM&D Pharma LimitedCompletedChronic Kidney Disease | HyperphosphatemiaUnited States
-
Ahmed Salah Ahmed Abd ElgalilCompletedEndotracheal Intubation | Randomized Controlled Trial | Sore Throat | Gum ChewingEgypt
-
Instituto Tecnologico y de Estudios Superiores...Completed
-
Medical University of ViennaCompletedGestational Diabetes Mellitus in PregnancyAustria
-
Inha University HospitalBobath Memorial HospitalRecruiting
-
American University of Beirut Medical CenterRecruiting
-
Ankara Medipol UniversityEnrolling by invitationAnxiety | Laryngeal Mask | Throat PainTurkey
-
Hospital for Special Surgery, New YorkCompletedReturn of Bowel Function Following Spinal SurgeryUnited States
-
Indus Hospital and Health NetworkAga Khan UniversityUnknown
-
Odense University HospitalDanish Cancer Society; Odense Patient Data Explorative NetworkCompletedHead and Neck Cancer | Xerostomia | Hyposalivation | Radiation Therapy ComplicationDenmark