Clinical trial Recruiting at 1 site Interventional Ages 18 and up

SP-D in GCF: Change after MINST in periodontitis

Official title: Evaluation of Surfactant Protein D (SP-D) Levels in the GCF of Periodontitis Patients Associated With the Endpoints After Minimally Invasive Non-surgical Periodontal Therapy: A Before and After Study

Run by Cairo University · NCT07599657 · Data updated 2026-11-12

This study tests whether levels of Surfactant Protein D in gum fluid change after a minimally invasive non-surgical periodontal treatment in adults with periodontitis.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment18 (estimated)
SponsorCairo University
Academic / other
Locations1 site (Cairo)
StatusRecruiting
StartedMay 14, 2026
Main results expectedFebruary 1, 2027
Study endsFebruary 1, 2027
Registry record updatedMay 20, 2026
Trial IDNCT07599657 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18 years and older with stage II or III periodontitis and at least one tooth with PPD ≥5 mm and CAL, plus radiographic bone loss, who are non-smokers and not on antibiotics or anti-inflammatories in the prior 3 months.

Probably not a fit

Patients for whom SP-D does not change after MINST or who have minimal clinical improvement may not experience a biomarker benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This single-group before-and-after study will measure SP-D levels in gingival crevicular fluid before treatment and again six months after minimally invasive non-surgical periodontal therapy in adults with stage II or III periodontitis. Clinical periodontal outcomes such as plaque, bleeding, pocket depth, attachment level, and recession will be recorded at baseline and follow-up, alongside patient satisfaction. GCF samples will be analyzed for SP-D using ELISA to explore whether the biomarker changes reflect treatment response alongside standard clinical measures.

Why it matters

Potential benefit: If SP-D levels track with clinical improvement, SP-D could serve as a biomarker to monitor treatment response in periodontitis.

How similar studies have gone: Previous studies have explored salivary and gingival biomarkers in periodontitis, but this specific SP-D GCF before-and-after MINST approach is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male and female participants aged 18 years or older.
* Diagnosis of periodontitis, classified as stage II or stage III according to the 2018 classification system.
* Presence of at least one tooth with probing pocket depth (PPD) of 5 mm or more, clinical attachment loss (CAL), and radiographic evidence of bone loss.
* Presence of at least one intrabony defect with a radiographic intrabony component measuring 3 mm or more.

Exclusion Criteria:

* Current smokers or individuals with a history of smoking within the past year.
* Pregnant or lactating women.
* Use of systemic antibiotics or anti-inflammatory medications within the last 3 months.
* Known allergy to any materials or agents used during periodontal therapy.

Where it's running

  • Faculty of Dentistry, Cairo University
    Cairo, Egypt
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.