Dietary Collagen Peptides and Periodontal Inflammation

Gingivitis Clinical Trial

Official title:

Dietary Intake of Collagen Peptides and Its Effects on Periodontal Inflammation - a Randomized Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03765125
• Other study ID #: VERIPA17
• Status: Completed
• Phase: N/A
• Start date: September 1, 2018
• Est. completion date: August 31, 2019

Study information

• Verified date: April 2019
• Source: Wuerzburg University Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This randomized, double-blind, placebo-controlled 2-arm, parallel group clinical trial is designed to evaluate the impact of the regular consumption of collagen peptides on the clinical signs of gingival and periodontal inflammation in a cohort of patients suffering from periodontal disease.

Description:

The positive influence of the regular consumption of bioactive collagen peptides on connective tissue and skin physiology has already been documented by several clinical trials. Preliminary data of an observational clinical trial involving periodontitis patients suggest that the adjunctive consumption of bio-active collagen peptides may also improve the outcome of established periodontitis therapy comprising the professional mechanical removal of disease-associated bacterial biofilms from exposed root surfaces.

This randomized, double-blind, placebo-controlled 2-arm, parallel group clinical trial is designed to evaluate the impact of the regular, 3-month consumption of collagen peptides on clinical and microbiological parameter of periodontal health in a cohort of periodontal recall patients with the following endpoints:

Primary Endpoint:

Change in the percentage of periodontal pockets being positive for bleeding on probing (BoP) after the consumption of the collagen peptides in comparison to the consumption of a placebo product

Secondary Endpoints:

1. changes in probing pocket depth (PPD)

2. changes in clinical attachment level (CAL)

3. changes in the periodontal inflammatory load as assessed by the calculation of the periodontal inflamed surface area (PISA) index

4. changes in Gingival Index (GI) scores

5. changes in Plaque Control Record (PCR) scores

6. changes in Plaque Index scores

7. changes in the composition of the sulcular/pocket microbiota

8. changes in the composition of the intestinal microbiota

Examiner calibration is performed before the onset of the trial and is repeated in 8 weeks intervals throughout the trial.

Sample Size Calculation As this is the first controlled clinical trial evaluating the impact of collagen peptide consumption on the extent of periodontal inflammation, sample size calculation is based on substitute data from preceding studies demonstrating an increase in tissue healing by up to 30%.

With a given difference of 30% reduction in the number of bleeding periodontal pockets (BoP) and an assumed standard deviation of 30% , sample size calculation resulted in a minimum of 19 subjects per group in order to be able to statistically verify differences with a power of 80%, and p<0.05.

Chi-square-test with maximum likelihood method will be used for the analysis of categorical variables, Mann-Whitney U-test will be used for the analysis of independent samples, and Wilcoxon signed rank test for the analysis of paired samples. The level of significance will be set to p≤0.05.

Study patients will be recruited from periodontitis patients seeking routine periodontal maintenance care comprising professional mechanical plaque removal (PMPR) at the Dept. of Periodontology of the University Hospital Wuerzburg.

At baseline prior to the performance of PMPR all above-mentioned study parameters will be recorded. Subsequently the study participants will be randomly assigned to the experimental groups (test/placebo) and a supply of the assigned product (test/placebo) will be given to them with the instruction to consume it 1 x daily for the 3-month duration of the trial.

At 2 months (visit 2) and at 3 months (end of study) after the baseline examination all clinical and microbiological parameters will be reassessed.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 40
• Est. completion date: August 31, 2019
• Est. primary completion date: August 26, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 70 Years

Eligibility

Inclusion Criteria:

• number of teeth = 10

• age = 35 = 70 years

• body mass index (BMI) = 24 = 30

• history of periodontal disease and inclusion in a regular scheme of supportive periodontal therapy (regularly repeated subgingival biofilm removal 2-4 x/year)

• presence of mild to moderate gingivitis (Gingiva Index > category GI 0 = category GI 2) at a minimum of 3 teeth

Exclusion Criteria:

• manifestation of inflammatory oral mucosal diseases other than gingivitis

• xerostomia (salivary flow = 0.1 ml/minute)

• inability for regular oral home care

• inability to follow the study protocol due to intellectual or physical handicaps

• history of malignancy, radiotherapy, or chemotherapy for malignancy in the past 5 years

• current pregnancy

• acute infections as HIV

• existence of metabolic bone disease

• smoking status of more than 10 cigarettes/day

• use of antibiotics and/or anti-inflammatory medication within 4 weeks prior to screening.

• active orthodontic therapy

• diabetes mellitus type I and II

• regular consumption of medications interfering with gingival inflammation (e.g. cortisol)

Related Conditions & MeSH terms

• Gingivitis
• Inflammation

Intervention

Dietary Supplement:
• collagen peptide test
Collagen peptides from bovine skin with an average molecular weight of approx. 2,000 g/mol. Average particle size is about 150 µm.
• collagen peptide placebo
collagen peptide placebo

Locations

Country	Name	City	State
Germany	Dept. of Periodontology, University Hospital Wuerzburg	Wuerzburg
Germany	Section of Periodontology	Wuerzburg

Sponsors (1)

Lead Sponsor	Collaborator
Wuerzburg University Hospital

Country where clinical trial is conducted

Germany, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Percentage of periodontal sites being positive for bleeding on probing (BoP)	Bleeding on probing will be recorded at 6 sites per tooth after gentle probing of the periodontal sulcus/pocket.	90 days
Secondary	clinical attachment level (CAL)	clinical attachment level will be assessed using a manual periodontal probe	90 days
Secondary	pocket probing depth (PPD)	pocket depth will be assessed using a manual periodontal probe	90 days
Secondary	periodontal inflamed surface area (PISA)	PISA values will be calculated using the recorded BoP, CAL and PPD data	90 days
Secondary	modified Gingival Index	The modified Gingival Index will be recorded from the buccal aspect of all teeth	90 days
Secondary	Plaque Control Record	The extension of plaque along the gingival margin will be assessed from the mesial, distal, buccal and oral aspects of all teeth using a standard periodontal probe.	90 days
Secondary	Plaque Index	The Plaque Index will be recorded from the vestibular aspects of the teeth 16, 21, 24, 36, 41, 44	90 days
Secondary	Composition of the oral microbiota	Subgingival plaque samples will be collected by paper points from the 4 deepest periodontal pockets of each patient and subsequently analysed by whole genome sequencing	90 days
Secondary	Composition of the intestinal microbiota	Stool samples will be collected from each study participant and subsequently analysed by whole genome sequencing	90 days