Oral hygiene quality is a key determinant of outcomes in both non-surgical and surgical periodontal therapy. Previous studies have demonstrated the negative impact of site-specific plaque accumulation on periodontal parameters. However, to the best of our knowledge, no studies have specifically investigated the correlation between plaque index and the percentage reduction in periodontal pocket depth, nor its association with other periodontal clinical parameters.
The aim of this study is to evaluate the relationship between plaque index and the percentage reduction in periodontal pockets, as well as its association with key periodontal parameters.
Following baseline data collection, patients will undergo non-surgical periodontal therapy in accordance with current guidelines. Clinical outcomes will be reassessed at 3, 6, 9, and 12 months post-treatment.
Diagnosis of periodontitis according to current guidelines.
Age between 18 and 80 years.
Patients who have previously received periodontal treatment.
Patients currently on antibiotic therapy or who have taken antibiotics in the past 3 months.
Pregnant or breastfeeding women.
Presence of systemic diseases or use of medications in which periodontal treatment is contraindicated or could affect study outcomes (e.g., antihypertensives, antiepileptics, immunosuppressants).
At least 100 patients with a baseline diagnosis of periodontitis, aged between 18 and 80 years, who have never received periodontal treatment, will be included in the study. Patients will be recruited from the Unit of Periodontology and Dental Hygiene at the Dental Clinic of the Department of Innovative Technologies in Medicine and Dentistry, University of "Gabriele D'Annunzio" of Chieti. Periodontitis will be diagnosed according to the criteria of Tonetti et al., 2018, regardless of grade, stage, or extent of the disease, in cases where periodontal diagnosis and treatment are indicated. Patients must have a confirmed diagnosis of periodontitis and be within the age range of 18 to 80 years. Individuals who have previously received periodontal treatment, are currently taking antibiotics or have taken antibiotics in the past three months, are pregnant or breastfeeding, or have systemic diseases or are on medications that contraindicate periodontal treatment or could influence study outc
Cohort
Prospective
Non-surgical periodontal therapy (NSPT)
Procedure/SurgeryPatients will receive non-surgical periodontal therapy, including professional supragingival (Step 1) and subgingival scaling and root planing (Step 2), according to current guidelines (Herrera et al., 2023). Oral hygiene instructions will be provided at baseline and reinforced at each follow-up visit. Clinical outcomes, including percentage of pocket depth reduction and plaque index (FMPS), will be recorded at 3, 6, 9, and 12 months post-treatment.
Percentage of probing pocket depth reduction
The primary outcome is the percentage reduction in probing pocket depth (PPD) at treated sites compared to baseline. PPD will be measured using a calibrated periodontal probe at each follow-up visit (3, 6, 9, and 12 months).
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