AzTrials
AzTrials

ObesityNCT07731412

Short-Term Changes in Salivary IL-6, TNF-α, and Periodontal Inflammation Following Sleeve Gastrectomy in Patients With Obesity: A Randomized Controlled Pilot Study

A study testing Laparoscopic Sleeve Gastrectomy, Non-Surgical Obesity Management and Standardized Oral-Hygiene Instructions in people with Obesity and Periodontitis, run by George Emil Palade University of Medicine, Pharmacy, Sciences and Technology of Targu Mures at 1 site in Romania.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

Obesity and periodontitis are chronic inflammatory conditions that may share biological pathways. This pilot randomized controlled study compared adults with obesity and stage I-III periodontitis assigned to laparoscopic sleeve gastrectomy or non-surgical management. Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Obesity, Periodontitis
What is being tested?
Laparoscopic Sleeve Gastrectomy, Non-Surgical Obesity Management and Standardized Oral-Hygiene Instructions
Could I receive a placebo?
No, everyone receives an active treatment
How many people
32 participants
Where
1 siteRomania
Study dates
1 Dec 2022to 30 Dec 2025
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age 18 to 65 years.
  • Body mass index (BMI) ≥35 kg/m² with one or more obesity-related comorbidities, or BMI ≥40 kg/m².
  • Stage I-III periodontitis according to the 2018 periodontitis stage/grade classification.
  • At least 12 natural teeth in each dental arch.
  • Written informed consent provided before enrollment.

Who cannot join

  • • Smoking more than 10 cigarettes per day.
  • Periodontal treatment within the previous 6 months.
  • Pregnancy or lactation.
  • Previous bariatric surgery.
  • Active autoimmune disorder, malignant disease, or another systemic disease known to markedly affect periodontal inflammation.
  • Recent antibiotic use
Show all 9Show fewer
  • Recent systemic corticosteroid use
  • Regular non-steroidal anti-inflammatory drug use within 90 days before enrollment.
  • Current anti-obesity glucagon-like peptide-1 (GLP-1) therapy.

Trial locations and contacts

1 site in 1 country.

Romania1 site
  • George Emil Palade University of Medicine, Pharmacy, Science and Technology of Targu Mures

    Târgu Mureş, 540136

Other trials in Romania

About this study

Obesity and periodontitis are chronic inflammatory conditions that may share biological pathways. This pilot randomized controlled study compared adults with obesity and stage I-III periodontitis assigned to laparoscopic sleeve gastrectomy or non-surgical management. Participants underwent body measurements, a full-mouth periodontal examination, and unstimulated saliva collection at baseline, 3 months, and 6 months. Salivary interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) were measured by enzyme-linked immunosorbent assay. The primary outcomes were changes in salivary IL-6 and TNF-α. Secondary outcomes included changes in plaque index, bleeding on probing, probing pocket depth, and clinical attachment level. Body weight and body mass index were measured as contextual outcomes, and exploratory analyses examined associations between cytokine and periodontal changes. The pilot was intended to test feasibility, refine measurement procedures, and estimate preliminary effect sizes for a future definitive trial.

Read the detailed description

This randomized, controlled, prospective, longitudinal pilot study used two parallel groups. Adults aged 18-65 years with severe obesity and stage I-III periodontitis were enrolled at the 2nd Department of Surgery at the Emergency County Clinical Hospital of Targu Mures, Romania, and associated private practices. After eligibility confirmation, baseline full-mouth periodontal examination, anthropometric assessment, and unstimulated saliva collection, participants were randomly assigned to laparoscopic sleeve gastrectomy (SG) or non-surgical management (NSG). The allocation sequence was generated using a computer-based random-number procedure by an investigator who was not involved in periodontal examination or laboratory analysis. Assignments were placed in sequentially numbered, opaque, sealed envelopes and opened after completion of baseline measurements. Randomization was simple and used no blocking or stratification. Participants and treating clinicians were not blinded.

Assessments occurred at baseline, 3 months, and 6 months. Baseline was the preoperative visit for SG participants and the enrollment visit for NSG participants. Weight and height were measured, and body mass index was calculated. A single calibrated examiner performed full-mouth periodontal examinations at six sites per tooth, excluding third molars. Measures included plaque index, probing pocket depth, clinical attachment level, and bleeding on probing. Unstimulated whole saliva was collected by passive drooling between 08:00 and 10:00 after at least 2 hours without eating, drinking, smoking, toothbrushing, or mouthrinse use. Samples were centrifuged, aliquoted, stored at -80 °C, and analyzed in duplicate for salivary IL-6 and TNF-α using commercial ELISA kits. All participants received standardized oral-hygiene instructions at baseline and were advised to maintain their usual oral care. No periodontal treatment was provided during follow-up unless clinically necessary.

The primary outcomes were longitudinal changes in salivary IL-6 and TNF-α, with the principal comparison from baseline to 6 months. Secondary outcomes were longitudinal changes in plaque index, bleeding on probing, probing pocket depth, and clinical attachment level. Body weight and body mass index were contextual outcomes. Exploratory analyses examined associations between cytokine and periodontal measures. The study was designed as a pilot to assess feasibility, refine procedures, and estimate preliminary effect sizes rather than establish definitive efficacy. A formal efficacy sample-size calculation was not performed; the target sample was based on recruitment feasibility, surgical scheduling capacity, ability to complete repeated periodontal and saliva visits, and available time and funding.

Being tested
Laparoscopic Sleeve Gastrectomy, Non-Surgical Obesity Management, Standardized Oral-Hygiene Instructions
Keywords
Bariatric Surgery, Sleeve Gastrectomy, Interleukin-6, Tumor Necrosis Factor-alpha, Periodontal Inflammation, Plaque Index, Bleeding on Probing
Medical subject headings
Obesity, Periodontitis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Laparoscopic Sleeve GastrectomyProcedure or surgery

    Participants randomized to the SG arm underwent laparoscopic sleeve gastrectomy as their obesity treatment.

  • Non-Surgical Obesity ManagementOther

    conservative management

  • Standardized Oral-Hygiene InstructionsBehavioural

    All participants received standardized oral-hygiene instructions at baseline and were advised to maintain their usual oral-care habits throughout follow-up. No periodontal treatment was provided during follow-up unless clinically necessary

Study groups in NCT07731412
Study groupRoleWhat they receive
Sleeve Gastrectomy Group (SG)ExperimentalParticipants allocated to SG underwent laparoscopic sleeve gastrectomy and completed anthropometric, periodontal, and saliva assessments at baseline, 3 months, and 6 months. They also received standardized oral-hygiene instructions at baseline; no periodontal treatment was provided during follow-up unless clinically necessary.
Receives: Procedure: Laparoscopic Sleeve Gastrectomy; Other: Non-Surgical Obesity Management; Behavioral: Standardized Oral-Hygiene Instructions
Non-Surgical Management Group (NSG)Active comparatorParticipants allocated to NSG received non-surgical management over the same follow-up period and completed anthropometric, periodontal, and saliva assessments at baseline, 3 months, and 6 months. They also received standardized oral-hygiene instructions at baseline; no periodontal treatment was provided during follow-up unless clinically necessary
Receives: Procedure: Laparoscopic Sleeve Gastrectomy; Other: Non-Surgical Obesity Management; Behavioral: Standardized Oral-Hygiene Instructions

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from baseline in salivary interleukin-6 (IL-6) concentration at 3 and 6 months

    Unstimulated whole saliva is collected by passive drooling for 5 minutes between 08:00 and 10:00 after at least 2 hours without eating, drinking, smoking, toothbrushing, or mouthrinse use. Samples are centrifuged at 3000 rpm for 10 minutes at 4 °C, aliquoted, and stored at -80 °C. IL-6 is measured with a commercial ELISA kit in duplicate; the duplicate mean is reported in pg/mL. The outcome is the within-participant change from baseline at each follow-up, with the principal endpoint at 6 months.

    Measured: Baseline, 3 months, and 6 months

  2. Change from baseline in salivary tumor necrosis factor-alpha (TNF-α) concentration at 3 and 6 months

    Unstimulated whole saliva is collected and processed under the same standardized conditions as for IL-6. TNF-α is measured with a commercial ELISA kit in duplicate; the duplicate mean is reported in pg/mL. The outcome is the within-participant change from baseline at each follow-up, with the principal endpoint at 6 months

    Measured: Baseline, 3 months, and 6 months

Secondary outcomes (4)
  1. Change from baseline in full-mouth Plaque Index at 3 and 6 months

    Plaque Index is calculated as the percentage of examined tooth surfaces with visible plaque during a full-mouth examination. Higher percentages indicate more visible plaque. The outcome is the within-participant change from baseline at each follow-up

    Measured: Baseline, 3 months, and 6 months

  2. Change from baseline in bleeding on probing at 3 and 6 months

    Bleeding on probing is recorded as present or absent within 15 seconds after probing at six sites per tooth, excluding third molars. The participant-level outcome is the percentage of examined sites that are BOP-positive. The outcome is the within-participant change from baseline at each follow-up.

    Measured: Baseline, 3 months, and 6 months

  3. Change from baseline in full-mouth mean probing pocket depth at 3 and 6 months

    Probing pocket depth is measured in millimeters from the gingival margin to the base of the periodontal pocket at six sites per tooth, excluding third molars. The participant-level outcome is the full-mouth mean PPD in millimeters. The outcome is the within-participant change from baseline at each follow-up

    Measured: Baseline, 3 months, and 6 months

  4. Change from baseline in full-mouth mean clinical attachment level at 3 and 6 months

    Clinical attachment level is measured in millimeters from the cemento-enamel junction to the base of the periodontal pocket at six sites per tooth, excluding third molars. The participant-level outcome is the full-mouth mean CAL in millimeters. The outcome is the within-participant change from baseline at each follow-up

    Measured: Baseline, 3 months, and 6 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Jul 2026
  2. Study start1 Dec 2022
  3. Primary completion15 Apr 2025
  4. Study completion30 Dec 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Participants were randomly assigned to laparoscopic sleeve gastrectomy or non-surgical management. Simple computer-generated randomization was used without blocking or stratification. The unequal 18/14 allocation arose by chance in the small pilot sample; no post-allocation rebalancing was performed.
Masking
None (open label)
Enrolment
32 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07731412
Sponsor's protocol ID
No.1863/15.09.2022
Other IDs
Research Grant Number 511/2/17
Status last verified
Jul 2026
First submitted
23 Jul 2026
Last updated
28 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Beresescu FG, Monea A, Ormenisan A, Tegla C, Cosarca A, Voidazan S. Short-Term Changes in Salivary IL-6, TNF-alpha, and Periodontal Inflammation Following Sleeve Gastrectomy in Patients with Obesity: A Randomized Controlled Pilot Study. Biomedicines. 2026 Aug 4;14(8):1759. doi: 10.3390/biomedicines14081759.

    PubMed 42652142

Questions about this trial

What is this clinical trial studying?

A study testing Laparoscopic Sleeve Gastrectomy, Non-Surgical Obesity Management and Standardized Oral-Hygiene Instructions in people with Obesity and Periodontitis, run by George Emil Palade University of Medicine, Pharmacy, Sciences and Technology of Targu Mures at 1 site in Romania.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 28 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Romania. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from baseline in salivary interleukin-6 (IL-6) concentration at 3 and 6 months (time frame: Baseline, 3 months, and 6 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07731412, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Jul 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in