The Effect of Non-surgical Periodontal Treatment in the Renal Function of Patients With Chronic Kidney Disease: RCT

July 20, 2025 updated by: Spyros Kouris, University of Athens

The Effect of Non-surgical Periodontal Treatment in the Renal Function of Patients With Chronic Kidney Disease: A Randomized Clinical Trial

Periodontal disease is a bacterially-induced inflammation. As such, it can become a point of entry of bacteria, toxins and cytokines into the systemic blood circulation, thus adversely affecting the function of kidneys. This is turn can aggravate the condition of patients with CKD.

The study hypothesis is that periodontal therapy can improve renal function in patients with CKD and lower the blood levels of markers for systemic inflammation.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
60

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Greece
      • Athens, Greece, 11527
        • University of Athens, Dental School, Department of Periodontology

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Chronic Kidney Disease (Stage II, III, IV)
  • At least 12 teeth present in the oral cavity
  • Moderate to severe chronic periodontitis, which is defined as: at least 8 surfaces with periodontal pocket depth (PPD) ≥5mm and at least 4 surfaces with Clinical Attachment Loss (CAL) ≥4mm, distributed in at least two quadrants.

Exclusion Criteria:

  • Patients that have had a renal transplant or undergoing dialysis
  • Acute infections or use of antibiotics in the past 3 months.
  • Auto-immune diseases, conditions that cause immunosuppression or use of immunosuppressant medication.
  • Systemic conditions that require antibiotic prophylaxis for routine periodontal therapy.
  • Non-surgical periodontal therapy in the past 6 months or surgical periodontal therapy in the past 12 months.
  • Use of medication that can cause gingival hyperplasia such as cyclosporine or fenintoin.
  • Myocardial infarction or cerebral vascular incident in the past 12 months or uncontrolled angina.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
No Intervention: Control

Full mouth supra-gingival debridement using hand instruments and ultrasonic scalers, in one session. Patient motivation and oral hygiene instructions Review and prophylaxis at 1 month, 3 months and 6 months after initial treatment session.

Full mouth periodontal therapy provided at the end of the 6month period (supra and sub- gingival full mouth scaling)
Active Comparator: Test/ Non-surgical Periodontal Therapy

Full mouth periodontal therapy (sub and supra- gingival debridement) provided under local anaesthesia in two half-mouth sessions.

Review and prophylaxis 1 month, 3 months and 6 months after the end of the initial therapy.
Procedure: Full Mouth Non-Surgical Periodontal Therapy
Non-surgical Periodontal Therapy provided in two sessions, one for the right half and one for the left half of the dentition. Treatment sessions are provided within one week. No antibiotics or other adjunctive medications are to be used

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
eGFR
Time Frame: 6 months
Estimated Glomerular Filtration Rate
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Level of IgG antibodies in serum against periodontal pathogens
Time Frame: 6 months

Serum samples will be screened for the presence of IgG antibodies against the below mentioned periodontal pathogens, using the "checkerboard immunoblotting" method:

Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Bacteroides forsythus, Treponema denticola, Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans, Campylobacter rectus, Eikenella corrodens, Peptostreptococcus micros, Veillonella parvula, Capnocytophaga ochracea, Streptococcus intermedius, Streptococcus sanguis και Streptococcus oralis.per
6 months
Composition of dental plaque
Time Frame: 6 months
Samples of subgingival plaque will be assessed using DNA probes according to the "checkerboard DNA- DNA hybridization" method. DNA probes will be used against the following bacteria: Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Bacteroides forsythus, Treponema denticola, Fusobacterium nucleatum, Actinobacillus actinomycetemcomitans, Campylobacter rectus, Eikenella corrodens, Peptostreptococcus micros, Veillonella parvula, Capnocytophaga ochracea, Streptococcus intermedius, Streptococcus sanguis and Streptococcus oralis
6 months
CRP
Time Frame: 6 months
C-Reactive Protein level
6 months
d-8-iso prostaglandin F2a
Time Frame: 6 months
d-8-iso prostaglandin F2a
6 months
HbA1C
Time Frame: 6 months
Glycosylated Hemoglobin
6 months
FMD / NMD
Time Frame: 6 months
Flow Mediated Dialation, Nitroglycerin Mediated Dialation, Assessment of Endothelial Dysfunction
6 months
PWV
Time Frame: 6 months
Pass Wave Velocity, Assessment of Endothelial Dysfunction
6 months
AIx
Time Frame: 6 months
Augmentaion Index
6 months
Cholesterol levels
Time Frame: 6 months
Chloesterol Levels
6 months
Ca
Time Frame: 6 months
Serum Calcium
6 months
P
Time Frame: 6 months
Serum Phosphate
6 months
Triglycerides
Time Frame: 6 months
Serum triglycerides
6 months
LDL / HDL
Time Frame: 6 months
Low / High Density Lipoprotein
6 months
Serum Urea
Time Frame: 6 months
Serum Urea
6 months
Serum Albumin
Time Frame: 6 months
Serum Albumin
6 months
Urine Albumin
Time Frame: 6 months
Urine Albumin
6 months
Urine Creatinine
Time Frame: 6 months
Urine Creatinine
6 months
Cr/Alb ratio
Time Frame: 6 months
Urine Creatinine / Albumin Ration
6 months

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Periodontal Indices (PPD, CAL, BOP, GI)
Time Frame: 6 months
Assessment of the periodontal status
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Athens

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Phoebus N Madianos, PhD, University of Athens

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 30, 2012

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 12, 2022

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 18, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 6, 2010

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 7, 2010

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 8, 2010

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 24, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 20, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 143

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.

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