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Periodontitis in Patients With Osteoarthritis

7. november 2026 opdateret af: Ivana Bradvica, University of Zagreb

Presence of Periodontitis in Patients With Osteoarthritis

The aim of the study is to determine the prevalence of periodontitis in patients with osteoarthritis. Methods: A case-control study is planned. The research would include patients of the Orthopaedic Clinic, University Hospital Centre Zagreb that have been diagnosed with osteoarthritis (cases). The control group would be patients from the Dental Polyclinic Zagreb, where the research will be conducted. All patients would undergo a dental examination to determine their periodontal status and periodontitis stage. Demographic parameters would include: age, gender, education, alcohol and cigarette consumption, exercise habits, BMI, oral hygiene habits, medication and medical history. Expected results: The aim of the study is to determine if there is a link between periodontitis and osteoarthritis. In patients with osteoarthritis a higher prevalence of periodontitis is expected, as well as more advanced stages of periodontitis, compared to the subjects of the control group. Scientific contribution: The results of the study might further confirm and strengthen the association between periodontitis and osteoarthritis. For the first time the proposed study will explore the presence of five key periodontopathogens in periodontal tissues and synovial fluid patients with periodontitis and osteoarthritis and examine the quality of life related to oral health.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Observationel

Tilmelding (Anslået)

60

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

  • Navn: Ivan Puhar
  • Telefonnummer: +38598566276
  • E-mail: puhar@sfzg.hr

Studiesteder

    • City of Zagreb
      • Zagreb, City of Zagreb, Kroatien, 10000
      • Zagreb, City of Zagreb, Kroatien, 10000
        • Rekruttering
        • Stomatološka poliklinika Zagreb
        • Kontakt:
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

The research would include patients from the Orthopedic Clinic of the University Hospital Centre Zagreb who have been diagnosed with knee or hip osteoarthritis (study group), and patients from the Dental Polyclinic Zagreb (control group), where the research will also be conducted. Patients would be divided into two subgroups depending on whether they have periodontitis or not.

Beskrivelse

Inclusion Criteria:

Diagnosed primary osteoarthritis of grade 4 according to the Kellgren-Lawrence scale Patients who are independently mobile or mobile with the aid of a walker or forearm crutches Signed informed consent Minimum of twenty teeth in the jaw (third molars are excluded)

Exclusion Criteria:

Use of systemic antibiotics or periodontal therapy performed within the last six months Systemic diseases known to be risk factors for the development of periodontitis (diabetes mellitus, obesity, rheumatoid arthritis, depression, hematological diseases) Secondary osteoarthritis Parkinson's disease Pregnant or breastfeeding women Neoplasms

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: OTHER
  • Tidsperspektiver: CROSS_SECTIONAL

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
patients with osteoarthritis

This is an observational study, and participants did not receive any study-specific intervention measures.

patients without osteoarthritis

This is an observational study, and participants did not receive any study-specific intervention measures.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
PPD
Tidsramme: Baseline (single assessment)

Periodontal probing depth - the distance in millimeters from the gingival margin to the base of the periodontal pocket. It is measured using a standard periodontal probe at 6 sites per tooth. Higher values indicate deeper periodontal pockets (worse periodontal status), while lower values indicate shallower pockets (better periodontal status).

Baseline (single assessment)
PCR microbiological testing
Tidsramme: Baseline (single assessment)

PCR test (polymerase chain reaction, 7500 Real-Time PCR System, Applied Biosystems/Method RT-PCR with Sybr-Green/melting curve analysis, validated according to micro-IDent®, Hain Lifescience GmbH, CE-IVD and PeriodontScreen Real-TM CE, Sacace Biotechnologies) is planned for the most common periodontopathogenic bacteria: Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythensis, Prevotella intermedia, and Treponema denticola. The test would be taken from all patients in the study group diagnosed with periodontitis.

Samples of bacteria would be collected from the periodontal pocket and synovial fluid. When testing bacteria from periodontal pockets, sterile paper points are inserted to the bottom of the deepest pockets and left in situ for 20 seconds. The paper points are then placed in a sterile test tube, tightly closed, and sent to the molecular laboratory of the Analiza Polyclinic. The procedure for collecting bacteria from synovial fluid also include

Baseline (single assessment)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
OHIP-14
Tidsramme: Baseline (single assessment)

OHIP-14 is a 14-item questionnaire that assesses the impact of oral health on oral health-related quality of life. Each item is scored on a Likert scale from 0 to 4 (0 = never, 1 = hardly ever, 2 = occasionally, 3 = fairly often, 4 = very often). The total score ranges from 0 to 56. Higher scores indicate worse oral health-related quality of life, while lower scores indicate better oral health-related quality of life.

Baseline (single assessment)
RE
Tidsramme: Baseline (single assessment)

Gingival recession is the distance in millimeters from the cementoenamel junction to the gingival margin. It is measured using a standard periodontal probe. Higher values indicate more pronounced gingival recession (worse condition), while lower values or a value of 0 indicate a normal position of the gingival margin.

Baseline (single assessment)
CAL
Tidsramme: Baseline (single assessment)

Clinical attachment level is the sum of probing depth and gingival recession at a given tooth site, expressed in millimeters. It represents the distance from the cementoenamel junction to the base of the periodontal pocket. Higher values indicate greater clinical attachment loss (worse condition), while lower values indicate a more preserved periodontal supporting structures.

Baseline (single assessment)
FMPS
Tidsramme: Baseline (single assessment)

Full-mouth plaque score - plaque accumulation will be assessing the presence or absence of supragingival plaque on six surfaces of each tooth. The results will be expressed as the percentage of plaque-positive surfaces relative to the total number of examined surfaces. FMPS is calculated by dividing the number of sites with plaque by the total number of examined sites and multiplying by 100. Scores range from 0% to 100%. Higher percentages indicate greater plaque accumulation (worse condition), while lower percentages indicate better oral hygiene.

Baseline (single assessment)
FMBS
Tidsramme: Baseline (single assessment)

Full-mouth bleeding score - gingival inflammation will be assessed recorded dichotomously (presence/absence of bleeding) following gentle probing of the gingival sulcus at standardized sites. The outcome will be expressed as the percentage of bleeding-positive sites, reflecting the degree of gingival inflammatory response. FMBS is calculated by dividing the number of bleeding sites by the total number of examined sites and multiplying by 100. Scores range from 0% to 100%. Higher percentages indicate greater gingival inflammation (worse condition), while lower percentages indicate healthier gingival tissue.

Baseline (single assessment)

Samarbejdspartnere og efterforskere

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Sponsor

Datoer for undersøgelser

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Studer store datoer

Studiestart (Faktiske)

15. januar 2025

Primær færdiggørelse (Anslået)

1. juni 2027

Studieafslutning (Anslået)

1. juli 2027

Datoer for studieregistrering

Først indsendt

7. november 2026

Først indsendt, der opfyldte QC-kriterier

7. november 2026

Først opslået (Faktiske)

13. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 05-PA-12-3/2024

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