Marker für Knochenabbau und oxidativen Stress bei Periimplantitis
Bewertung von Knochenabbau und Markern für oxidativen Stress im Speichel und in der periimplantären Sulkusflüssigkeit bei Periimplantitis
The aim of this study is to evaluate and compare the levels of bone resorption (RANKL, OPG) and oxidative stress (Nitrotyrosine, NQO1) markers, along with pro-inflammatory cytokines (IL-1β), in the saliva and peri-implant sulcular fluid (PISF) of patients with peri-implantitis, periodontitis, and healthy individuals. The study seeks to determine the diagnostic value of these biomarkers in the early detection and progression of peri-implant diseases.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Detaillierte Beschreibung
Patients applying to the University of Health Sciences, Gulhane Faculty of Dentistry, Department of Periodontology, will be screened according to the inclusion and exclusion criteria. Following clinical and radiographic examinations, participants will be categorized into four groups (n=20 per group): Periodontitis, Peri-implantitis, Periodontal Health, and Peri-implant Health. All clinical parameters, including Plaque Index (PI), Gingival Index (GI), Bleeding on Probing (BOP), Probing Depth (PD), and Clinical Attachment Loss (CAL), will be recorded at six sites per tooth/implant using a Williams periodontal probe.
The biological sample collection protocol will be conducted as follows:
Saliva Collection: To minimize circadian rhythm variations, unstimulated whole saliva samples (3 ml) will be collected between 9:00 AM and 10:00 AM. Patients will be instructed to refrain from eating, drinking, or oral hygiene procedures for at least one hour prior to collection. Samples will be centrifuged at 1,000g for 10 minutes to remove cellular debris, and the supernatant will be stored at -80°C until laboratory analysis.
Peri-implant Sulcular Fluid (PISF) and Gingival Crevicular Fluid (GCF) Collection: Samples will be obtained from the site with the deepest probing depth in each participant. The area will be isolated with cotton rolls and gently dried with an air syringe to prevent salivary contamination. Periopaper strips will be inserted into the sulcus/pocket for 30 seconds. Strips contaminated with blood or visible saliva will be discarded.
Laboratory Analysis: The concentrations of Interleukin-1 beta (IL-1β), Nitrotyrosine, Receptor Activator of Nuclear Factor Kappa-B Ligand (RANKL), Osteoprotegerin (OPG), and NAD(P)H: Quinone Oxidoreductase 1 (NQO1) will be quantified in both saliva and PISF/GCF samples using commercially available Enzyme-Linked Immunosorbent Assay (ELISA) kits according to the manufacturer's instructions.
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Nurullah Yurdakul, Dr.
- Telefonnummer: +905340757662
- E-Mail: nurullah.yurdakul@sbu.edu.tr
Studienorte
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Ankara
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Keçiören, Ankara, Türkei (türkiye), 06010
- Rekrutierung
- Gülhane Faculty of Dentistry, University of Health Sciences
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Kontakt:
- Nurullah Yurdakul
- Telefonnummer: 05340757662
- E-Mail: yurdakul.nurullah@gmail.com
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Patients who apply to the University of Health Sciences, Gulhane Faculty of Dentistry, Department of Periodontology, and meet the specific clinical and radiographic criteria for peri-implantitis, periodontitis, or health.
Beschreibung
Inclusion Criteria:
Systemically healthy volunteers aged 18-65. For Peri-implantitis group: Implants in function for ≥1 year, radiographic bone loss ≥ 2 mm, probing depth (PD) ≥ 5 mm, and presence of bleeding on probing (BOP) or suppuration.
For Periodontitis group: At least one tooth with PD ≥ 4 mm, presence of BOP, and radiographic bone loss.For Healthy groups: PD ≤ 3 mm, no clinical inflammation (BOP-), and no radiographic bone loss.
(According to the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases) -
Exclusion Criteria:Presence of systemic diseases (e.g., diabetes, rheumatoid arthritis, osteoporosis).
Use of antibiotics, anti-inflammatory, or immunosuppressive drugs within the last 3 months.
Pregnancy or breastfeeding.
Smoking (current smokers).
History of periodontal or peri-implant surgical treatment within the last 6 months.
Implant failure (mobility).
Signs of acute infection (fever, systemic symptoms).
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Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Beobachtungsmodelle: CASE_CONTROL
- Zeitperspektiven: CROSS_SECTIONAL
Anzahl der Gruppen / Kohorten
Kohorten und Interventionen
Gruppe / KohorteGruppe / Kohorte |
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Peri-implantitis Group
Patients with at least one dental implant in function for at least 1 year, showing signs of inflammation (BOP/suppuration), probing depth (PD) ≥ 5 mm, and radiographic bone loss ≥ 2 mm. |
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Periodontitis Group
Patients with at least one tooth having clinical probing depth ≥ 4 mm, presence of bleeding on probing (BOP), and evidence of radiographic alveolar bone loss. |
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Peri-implant Health Group
Patients with implants in function for at least 1 year, showing no signs of inflammation (no BOP), probing depth ≤ 3 mm, and no radiographic bone loss. |
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Periodontal Health Group
Systemically healthy individuals with clinical probing depths ≤ 3 mm, minimal plaque and bleeding scores, and no radiographic evidence of bone loss. |
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Salivary and Peri-implant Sulcular Fluid (PISF) IL-1β Levels.
Zeitfenster: At the baseline clinical examination (Day 0).
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The concentration of Interleukin-1 beta (IL-1β), a pro-inflammatory cytokine, will be measured in picograms per milliliter (pg/mL) using ELISA kits to evaluate the severity of inflammation and bone destruction. |
At the baseline clinical examination (Day 0).
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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Salivary and Peri-implant Sulcular Fluid (PISF) Nitrotyrosine Levels
Zeitfenster: Baseline (at the time of clinical examination)
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Concentration of Nitrotyrosine will be measured in saliva and PISF samples using ELISA kits. Nitrotyrosine serves as a biochemical marker of nitrosative stress to evaluate oxidative damage. |
Baseline (at the time of clinical examination)
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Salivary and Peri-implant Sulcular Fluid (PISF) NQO1 Levels
Zeitfenster: Baseline (at the time of clinical examination)
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NAD(P)H: Quinone Oxidoreductase 1 (NQO1) levels will be measured using ELISA kits to assess the local and systemic antioxidant defense response. |
Baseline (at the time of clinical examination)
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Salivary and Peri-implant Sulcular Fluid (PISF) RANKL Levels
Zeitfenster: Baseline (at the time of clinical examination)
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Receptor Activator of Nuclear Factor Kappa-B Ligand (RANKL) levels will be measured to evaluate osteoclast activation and bone destruction potential. |
Baseline (at the time of clinical examination)
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Salivary and Peri-implant Sulcular Fluid (PISF) OPG Levels
Zeitfenster: Baseline (at the time of clinical examination)
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Osteoprotegerin (OPG) levels will be measured. OPG acts as a decoy receptor for RANKL, and its level indicates the body's attempt to inhibit bone resorption. |
Baseline (at the time of clinical examination)
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Clinical Attachment Loss (CAL) and Probing Depth (PD)
Zeitfenster: Baseline (at the time of clinical examination)
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CAL and PD will be measured in millimeters (mm) at six sites per tooth/implant using a Williams periodontal probe to assess the severity of tissue destruction. |
Baseline (at the time of clinical examination)
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Plaque Index (PI) and Gingival Index (GI)
Zeitfenster: Baseline (at the time of clinical examination)
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PI and GI will be recorded using Silness-Löe and Löe-Silness indices (scored 0-3) to evaluate oral hygiene status and gingival inflammation. |
Baseline (at the time of clinical examination)
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Gülbahar Ustaoğlu, Professor, University of Health Sciences, Gulhane Faculty of Dentistry, Department of Periodontology
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 2025-403
Plan für individuelle Teilnehmerdaten (IPD)
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Beschreibung des IPD-Plans
The individual participant data will not be shared to protect participant privacy.
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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