CClinicalTrials.gg
CompletedNCT01976806DAPUpdated Dec 13, 2017Results posted

The Effects of DHA on Periodontitis

A Phase 2 interventional study of Aspirin and Docosahexaenoic acid in Periodontitis, Gingivitis and Inflammation, sponsored by Beth Israel Deaconess Medical Center. Completed at 1 site in United States. Open to participants aged 40 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-12-13.

Sponsored by Beth Israel Deaconess Medical Center · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
55
Allocation
Randomized
Ages
40 Years and older
Sex
All
01

Study summary

The purpose of this study is to determine whether docosahexaenoic acid (DHA) is effective in the treatment of periodontitis in adults.

Read the detailed description
  1. The primary aim of this study is to investigate the effect of docosahexaenoic acid (DHA; 2 gm/day) plus low dose aspirin (ASA 81 mg/day)compared to ASA alone on periodontitis over three months. Our hypothesis is that DHA plus ASA will improve periodontitis as measured by objective periodontal exam, including decreased pocket depth (mm), gingival index (0-3), plaque index (0-3) and bleeding on probing (yes/no) compared to ASA alone.
  2. Assess the effect of DHA and ASA exposure on markers of local inflammation, including gingival crevicular fluid (GCF) CRP, IL-1 beta and IL-6 three months after exposure to DHA plus ASA compared to ASA alone.
  3. Evaluate potential mechanisms through changes in the periodontal microbial flora which may occur as a result of exposure to DHA and ASA compared to ASA alone. Our hypothesis is that there will be a substantial post therapy change in the microbial flora of dental plaques, favoring bacteria associated with a lower systemic inflammatory state.
  4. Assess the effect of DHA and ASA exposure on markers of systemic inflammation, including serum C-Reactive Protein (CRP), interleukin-6 (IL-6) and vascular adhesion molecule (VCAM) compared to ASA. Our hypothesis is that there will be a decrease in serum CRP, IL-6 and VCAM three months after exposure to DHA plus ASA compared to ASA alone.
  5. Assess the effect of DHA and ASA exposure on markers of systemic bone turnover, including urine N-terminal telopeptide (NTx) compared to ASA. Our hypothesis is that there will be a decrease in urine NTx three months after exposure to DHA plus ASA compared to ASA alone.
02

Conditions studied

  • Periodontitis
  • Gingivitis
  • Inflammation

Keywords

  • Docosahexaenoic acid
  • DHA
  • Periodontitis
  • Gingivitis
  • Omega-3 fatty acid
  • Fish oil
03

In context

Gingivitis

590 studies on the registry are indexed under Gingivitis; 104 are open to participants now.

This study's enrollment of 55 is below the median of 64 across 478 interventional studies indexed under Gingivitis.

Browse Gingivitis studies →

Lead sponsor

Beth Israel Deaconess Medical Center is the lead sponsor of 560 studies on the registry; 80 are open to participants now.

Of its 75 completed or terminated interventional studies of FDA-regulated products, 61 (81%) have results posted.

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

04

Who can participate

Ages eligible
40 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • age >40 years
  • >20 natural teeth (excluding third molars)
  • no orthodontic appliances
  • periodontitis defined as >4 teeth with pocket probing depths >5 mm

Exclusion criteria

Exclusion Criteria:

  • pregnancy
  • diabetes
  • severe chronic diseases
  • gastrointestinal bleeding
  • uncontrolled chronic diseases
  • autoimmune disorders
  • conditions requiring antibiotic prophylaxis
  • warfarin
  • clopidogrel
  • antimicrobial therapy within 30 days
  • chronic use of non-steroidal anti-inflammatory drugs (other than aspirin)
  • omega-3 fatty acid use within 6 months
  • loose teeth
  • painful teeth
  • periodontal abscess
  • pocket depths >10 mm in >1 tooth
  • periodontal therapy within the past two years
  • allergy to aspirin
  • allergy to fish oil
  • allergy to corn oil
  • allergy to soybean oil
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
55 participants (actual)

Study arms

  • Experimental
    Aspirin & Docosahexaenoic acid

    Aspirin 81 mg 1 tablet by mouth daily and Docosahexanoic acid (DHA) 500 mg 4 capsules by mouth daily (total daily dose of 2 grams DHA) for 3 months

    Drug: Aspirin · Drug: Docosahexaenoic acid

  • Active comparator
    Aspirin & Placebo

    Aspirin 81 mg by mouth daily and placebo (50% corn oil/50% soybean oil) 4 capsules by mouth daily for 3 months

    Drug: Aspirin · Drug: Placebo (for Docosahexaenoic acid)

Interventions

  • DrugAspirin

    Also known as: Baby Aspirin, Low Dose Aspirin

  • DrugDocosahexaenoic acid

    Also known as: DHA

  • DrugPlacebo (for Docosahexaenoic acid)

    Placebo (corn/soybean oil) capsules manufactured to look identical to DHA capsules

    Also known as: 50% corn oil/50% soybean oil

06

What researchers measure

Primary outcomes

  1. Change in Pocket Depth (mm)

    Pocket probing depth (PD) is the depth a dental probe can be inserted into a gingival pocket at a particular site (6 sites per tooth) measured in millimeters among teeth with PD greater than or equal to 5 mm (N=533 dental sites total).

    Time frame: Baseline and 3 months

Secondary outcomes

  1. Change in Gingival Index (0-3)

    Gingival Index (GI) is a measure of gingival inflammation, which is assigned a score (0-3). Score Criteria: 0: No inflammation. 1. Mild inflammation, slight change in color, slight edema, no bleeding on probing. 2. Moderate inflammation, moderate glazing, redness, bleeding on probing. 3. Severe inflammation, marked redness and hypertrophy, ulceration, tendency to spontaneous bleeding.

    Time frame: Baseline and 3 months

  2. Change in Plaque Index (0-3)

    Plaque Index (PI) is a measure of gingival inflammation as induced by bacterial plaque deposition at and under the gum line. Score Criteria: 0: No plaque 1. A film of plaque adhering to the free gingival margin and adjacent area of the tooth, which can not be seen with the naked eye. But only by using disclosing solution or by using probe. 2. Moderate accumulation of deposits within the gingival pocket, on the gingival margin and/ or adjacent tooth surface, which can be seen with the naked eye. 3. Abundance of soft matter within the gingival pocket and/or on the tooth and gingival margin.

    Time frame: Baseline and 3 months

  3. Sites With Bleeding on Probing (Yes/no)

    Bleeding On Probing (BOP) is a measure of gingival inflammation and tissue destruction, which describes whether or not bleeding at the dental pocket occurred following probing.

    Time frame: 3 months

  4. Gingival Crevicular Fluid High Sensitivity C-reactive Protein

    Gingival crevicular fluid (GCF) is the fluid bathing the teeth under the gum line. GCF samples were analyzed for high sensitivity C-reactive protein as a measure of local gingival inflammation.

    Time frame: Baseline and 3 months

  5. Gingival Crevicular Fluid Interleukin-6

    Gingival crevicular fluid (GCF) samples were analyzed for Interleukin-6, which is a measure of local gingival inflammation.

    Time frame: Baseline and 3 months

  6. Gingival Crevicular Fluid Interleukin-1 Beta

    Gingival crevicular fluid (GCF) samples were analyzed for Interleukin-1 beta, which is a measure of local gingival inflammation.

    Time frame: Baseline and 3 months

  7. Serum High-sensitivity C-reactive Protein

    Serum high-sensitivity C-reactive protein is a measure of systemic inflammation.

    Time frame: Baseline and 3 months

  8. Serum High-sensitivity Interleukin-6

    Serum high-sensitivity interleukin-6 is a measure of systemic inflammation.

    Time frame: Baseline and 3 months

  9. Serum Soluble Vascular Cell Adhesion Molecule

    Serum soluble vascular cell adhesion molecule (VCAM) is a measure of systemic inflammation.

    Time frame: Baseline and 3 months

  10. Urine N-Terminal Telopeptides

    Urine N-Terminal Telopeptides are a measure of systemic bone turnover.

    Time frame: Baseline and 3 months

Other outcomes

  1. Change in Red Blood Cell Membrane Docosahexaenoic Acid

    Red blood cell phospholipid fatty acids were measured at baseline and 3-month follow up as a measure of adherence.

    Time frame: Baseline and 3 months

07

Results

Posted Mar 24, 2014

Participant flow

Participant flow — Overall Study
MilestoneAspirin & Docosahexaenoic AcidAspirin & Placebo
Started2728
Completed2422
Not completed36
Withdrew: Lost to follow-up14
Withdrew: Adverse event11
Withdrew: Withdrawal by subject11

Outcome measures

PrimaryChange in Pocket Depth (mm)

Pocket probing depth (PD) is the depth a dental probe can be inserted into a gingival pocket at a particular site (6 sites per tooth) measured in millimeters among teeth with PD greater than or equal to 5 mm (N=533 dental sites total).

Time frame:
Baseline and 3 months
Reported as:
Mean · mm
Change in Pocket Depth (mm)
mmAspirin & Docosahexaenoic AcidAspirin & Placebo
Change in Pocket Depth (mm)-0.71 ± 0.07-0.54 ± 0.07
Statistical analysis
  • Aspirin & Docosahexaenoic Acid vs Aspirin & Placebo · Mixed Models Analysis · p = <0.05 · Mean difference (net): -0.29Mean change in pocket depth (3-month follow-up minus baseline) among dental sites with baseline pocket depths \>=5 mm in the DHA intervention group versus the placebo group.
SecondaryChange in Gingival Index (0-3)

Gingival Index (GI) is a measure of gingival inflammation, which is assigned a score (0-3). Score Criteria: 0: No inflammation. 1. Mild inflammation, slight change in color, slight edema, no bleeding on probing. 2. Moderate inflammation, moderate glazing, redness, bleeding on probing. 3. Severe inflammation, marked redness and hypertrophy, ulceration, tendency to spontaneous bleeding.

Time frame:
Baseline and 3 months
Reported as:
Mean · GI units
Change in Gingival Index (0-3)
GI unitsAspirin & Docosahexaenoic AcidAspirin & Placebo
Change in Gingival Index (0-3)-0.26 ± 0.04-0.07 ± 0.04
SecondaryChange in Plaque Index (0-3)

Plaque Index (PI) is a measure of gingival inflammation as induced by bacterial plaque deposition at and under the gum line. Score Criteria: 0: No plaque 1. A film of plaque adhering to the free gingival margin and adjacent area of the tooth, which can not be seen with the naked eye. But only by using disclosing solution or by using probe. 2. Moderate accumulation of deposits within the gingival pocket, on the gingival margin and/ or adjacent tooth surface, which can be seen with the naked eye. 3. Abundance of soft matter within the gingival pocket and/or on the tooth and gingival margin.

Time frame:
Baseline and 3 months
Reported as:
Mean · Plaque index units
Change in Plaque Index (0-3)
Plaque index unitsAspirin & Docosahexaenoic AcidAspirin & Placebo
Change in Plaque Index (0-3)-0.10 ± 0.060.07 ± 0.07
SecondarySites With Bleeding on Probing (Yes/no)

Bleeding On Probing (BOP) is a measure of gingival inflammation and tissue destruction, which describes whether or not bleeding at the dental pocket occurred following probing.

Time frame:
3 months
Reported as:
Count of units · Sites
Sites With Bleeding on Probing (Yes/no)
SitesAspirin & Docosahexaenoic AcidAspirin & Placebo
Sites With Bleeding on Probing (Yes/no)202227
SecondaryGingival Crevicular Fluid High Sensitivity C-reactive Protein

Gingival crevicular fluid (GCF) is the fluid bathing the teeth under the gum line. GCF samples were analyzed for high sensitivity C-reactive protein as a measure of local gingival inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · ng/mL
Gingival Crevicular Fluid High Sensitivity C-reactive Protein
ng/mLAspirin & Docosahexaenoic AcidAspirin & Placebo
Gingival Crevicular Fluid High Sensitivity C-reactive Protein-7.3715 ± 3.9244-3.1268 ± 2.0415
SecondaryGingival Crevicular Fluid Interleukin-6

Gingival crevicular fluid (GCF) samples were analyzed for Interleukin-6, which is a measure of local gingival inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · pg/mL
Gingival Crevicular Fluid Interleukin-6
pg/mLAspirin & Docosahexaenoic AcidAspirin & Placebo
Gingival Crevicular Fluid Interleukin-60.1422 ± 0.5273-0.00226 ± 0.3245
SecondaryGingival Crevicular Fluid Interleukin-1 Beta

Gingival crevicular fluid (GCF) samples were analyzed for Interleukin-1 beta, which is a measure of local gingival inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · pg/mL
Gingival Crevicular Fluid Interleukin-1 Beta
pg/mLAspirin & Docosahexaenoic AcidAspirin & Placebo
Gingival Crevicular Fluid Interleukin-1 Beta0.8775 ± 4.720321.5816 ± 8.0491
SecondarySerum High-sensitivity C-reactive Protein

Serum high-sensitivity C-reactive protein is a measure of systemic inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · mg/L
Serum High-sensitivity C-reactive Protein
mg/LAspirin & Docosahexaenoic AcidAspirin & Placebo
Serum High-sensitivity C-reactive Protein-0.3695 ± 0.55580.7114 ± 0.7223
SecondarySerum High-sensitivity Interleukin-6

Serum high-sensitivity interleukin-6 is a measure of systemic inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · pg/mL
Serum High-sensitivity Interleukin-6
pg/mLAspirin & Docosahexaenoic AcidAspirin & Placebo
Serum High-sensitivity Interleukin-60.3295 ± 0.4149-0.0690 ± 0.2633
SecondarySerum Soluble Vascular Cell Adhesion Molecule

Serum soluble vascular cell adhesion molecule (VCAM) is a measure of systemic inflammation.

Time frame:
Baseline and 3 months
Reported as:
Mean · ng/mL
Serum Soluble Vascular Cell Adhesion Molecule
ng/mLAspirin & Docosahexaenoic AcidAspirin & Placebo
Serum Soluble Vascular Cell Adhesion Molecule4.8829 ± 24.366727.9409 ± 19.6992
SecondaryUrine N-Terminal Telopeptides

Urine N-Terminal Telopeptides are a measure of systemic bone turnover.

Time frame:
Baseline and 3 months
Reported as:
Mean · nM BCE
Urine N-Terminal Telopeptides
nM BCEAspirin & Docosahexaenoic AcidAspirin & Placebo
Urine N-Terminal Telopeptides103.3333 ± 70.565661.8421 ± 90.5793
Other pre-specifiedChange in Red Blood Cell Membrane Docosahexaenoic Acid

Red blood cell phospholipid fatty acids were measured at baseline and 3-month follow up as a measure of adherence.

Time frame:
Baseline and 3 months
Reported as:
Mean · % of total RBC FA
Change in Red Blood Cell Membrane Docosahexaenoic Acid
% of total RBC FAAspirin & Docosahexaenoic AcidAspirin & Placebo
Change in Red Blood Cell Membrane Docosahexaenoic Acid2.723 ± 0.3882-0.1776 ± 0.1326

Adverse events

Collected over 3 months. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
DHA 2 gm (4 Caps) + Aspirin 81 mg (1 Tablet by Mouth Per Day)—0/27 (0%)7/27 (25.9%)
Placebo (4 Caps) + Aspirin 81 mg (1 Tablet by Mouth Per Day)—0/28 (0%)8/28 (28.6%)
Most frequent other events
Showing 10 of 15
Most frequent other events
EventDHA 2 gm (4 Caps) + Aspirin 81 mg (1 Tablet by Mouth Per Day)Placebo (4 Caps) + Aspirin 81 mg (1 Tablet by Mouth Per Day)
FlatulenceGastrointestinal disorders3/271/28
DyspepsiaGastrointestinal disorders2/272/28
FatigueGeneral disorders2/271/28
HeadacheGeneral disorders2/270/28
DiarrheaGastrointestinal disorders1/271/28
Chipped toothGeneral disorders1/270/28
Intermittent palpitationsCardiac disorders1/270/28
DiaphoresisGeneral disorders1/270/28
Gingival bleeding while flossingBlood and lymphatic system disorders0/271/28
Upper respiratory infectionInfections and infestations0/271/28

Baseline characteristics

Includes all subjects that completed follow-up

Age, Continuous
Age, Continuous(years)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Mean53 ± 857 ± 855 ± 8
Sex: Female, Male
Sex: Female, Male(Participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Female111021
Male131225
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
American Indian or Alaska Native000
Asian415
Native Hawaiian or Other Pacific Islander000
Black or African American7815
White121224
More than one race011
Unknown or Not Reported101
Smoking Status
Smoking Status(participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Current112
Former7613
Never161531
BMI (kg/m2)
BMI (kg/m2)(participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Normal (18.5-24.9 kg/m2)9514
Overweight (25-30 kg/m2)41014
Obese (>30 kg/m2)11718
Hypertension
Hypertension(participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Hypertension4610
No Hypertension201636
Hyperlipidemia
Hyperlipidemia(participants)Aspirin & Docosahexaenoic AcidAspirin & PlaceboTotal
Hyperlipidemia549
No Hyperlipidemia191837
08

Study locations

1 site
  • Beth Israel Deaconess Medical Center
    Boston, Massachusetts 02215, United States
09

References and documents

Publications

  • Naqvi AZ, Mu L, Hasturk H, Van Dyke TE, Mukamal KJ, Goodson JM. Impact of Docosahexaenoic Acid Therapy on Subgingival Plaque Microbiota. J Periodontol. 2017 Sep;88(9):887-895. doi: 10.1902/jop.2017.160398. Epub 2017 May 18. PubMed 28517974 ↗
  • Naqvi AZ, Hasturk H, Mu L, Phillips RS, Davis RB, Halem S, Campos H, Goodson JM, Van Dyke TE, Mukamal KJ. Docosahexaenoic Acid and Periodontitis in Adults: A Randomized Controlled Trial. J Dent Res. 2014 Aug;93(8):767-73. doi: 10.1177/0022034514541125. Epub 2014 Jun 26. PubMed 24970858 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 13, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01976806
Lead sponsor
Beth Israel Deaconess Medical Center
Collaborators
National Center for Research Resources (NCRR), Harvard Medical School (HMS and HSDM)
Responsible party
Kenneth Mukamal (Associate Professor of Medicine, Beth Israel Deaconess Medical Center) — Principal investigator
First posted
Nov 6, 2013
Start date
Jun 2009
Primary completion
Sep 2011
Completion
Sep 2011
Results posted
Mar 24, 2014
Last update
Dec 13, 2017

Study contacts

Asghar Z Naqvi, MD, MPH, MNS
principal investigator · Beth Israel Deaconess Medical Center; Harvard Medical School
Kenneth J Mukamal, MD, MPH, MA
study chair · Beth Israel Deaconess Medical Center

Oversight

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

Not currently enrolling

This study is completed, as verified in Nov 2017. 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