An interventional study of Functionnal test in Periodontitis, Periodontal Diseases and Quality of Life, sponsored by University Hospital, Clermont-Ferrand. Recruiting at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-11-02.
Sponsored by University Hospital, Clermont-Ferrand · Not applicable, Interventional, and Treatment
The objective of this single-center prospective study is to evaluate the impact of periodontal treatment on masticatory performance in patients with periodontitis.
Participants will be asked to complete several questionnaires related to their oral health and quality of life. Functional masticatory tests and salivary flow measurements will also be performed.
The questionnaires administered are as follows:
The functional test (masticatory performance "chewing gum" test) will be performed at each visit if applicable (T0, T1, T2) to evaluate the impact of periodontal treatment on masticatory function. The two-colour chewing gum test is a commonly used method for assessing masticatory mixing ability.
Saliva collection for salivary flow analysis will also be performed at each follow-up visit in order to evaluate the impact of periodontal treatment on salivary function.
1,231 studies on the registry are indexed under Periodontitis; 295 are open to participants now.
This study's planned enrollment of 44 is close to the median of 44 across 846 interventional studies indexed under Periodontitis.
Browse Periodontitis studies →University Hospital, Clermont-Ferrand is the lead sponsor of 859 studies on the registry; 179 are open to participants now.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients diagnosed with periodontitis will receive standard non-surgical periodontal treatment as part of routine care. Clinical and functional assessments will be performed at baseline (T0) and during follow-up visits (T1, T2) to evaluate changes in masticatory performance, salivary flow, and oral health-related quality of life.
Other: Functionnal test
Administration of questionnaires, functional masticatory test, and saliva collection.
The patient's masticatory performance score
The patient's masticatory performance score, obtained from the masticatory performance test (two-color chewing gum test) (quantitative variable).
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Severity of periodontal disease assessed by stage.
Periodontitis is defined according to two criteria: grade and stage. The latter is used to characterize the severity of periodontal involvement. The stage of periodontitis is determined according to a four-level classification system, ranging from Stage 1 (low) to Stage 4 (high).
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Salivation
Salivary flow is measured by collecting saliva at rest and after stimulation in mL/min. Stimulated salivary flow is assessed after chewing paraffin for 1 minute. The XI questionnaire (Xerostomia Inventory), proposed by Thomson et al. and validated in French, will also be administered (6,7). The XI consists of 11 items. Each item is scored on a scale of 1 to 5 to indicate how frequently the described situation occurs for the patient. The scores for each item are added together to yield a total score ranging from 11 (no dry mouth) to 55 (extreme dry mouth).
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Swallowing
Oropharyngeal dysphagia is assessed using the EAT-10 (Eating Assessment Tool) questionnaire, which has been validated in French. The questionnaire comprises 10 items designed to assess swallowing disorders and the patient's perception of oropharyngeal dysphagia. Each item is rated on a 5-point scale ranging from 0 (no difficulty) to 4 (severe difficulty), resulting in a total score ranging from 0 to 40. A total score of 3 or higher indicates difficulty swallowing safely.
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Periodontitis grade (Chicago Classification)
Grade of periodontitis according to the Chicago Classification. Categorical (Grade A (low) to C (fast) or as defined by classification)
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Gingival recessions
Measurement of gingival recession depth. Unit of Measure : Millimeters (mm)
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Plaque Index
Plaque accumulation assessed using a validated plaque index (specify full name of index). Unit of Measure: Score (range: specify minimum and maximum values of the scale) Interpretation: Higher scores indicate worse oral hygiene status.
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Edentulism
Presence or absence of edentulism.
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Bleeding on Probing (BOP)
Percentage (%) of sites showing bleeding on probing.
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Pocket Depth
Periodontal probing depth. Unit of Measure: Millimeters (mm)
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Tooth Mobility
Tooth mobility assessed using the Miller classification (Grade 0-3). Higher scores indicate greater mobility and worse periodontal condition. Unit of Measure: Millimeters (mm)
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Number of Posterior Functional Dental Units
Count of posterior functional dental units. Unit of Measure: Millimeters (mm)
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Oral quality of life
The French version of the GOHAI (General Oral Health Assessment Index) questionnaire is used to assess the impact of oral health on participants' quality of life (10,11). The GOHAI consists of 12 items divided into 3 subgroups: a group related to the functional domain (items 1, 2, 3, and 4), a group related to the psychosocial domain (items 6, 7, 9, 10, and 11), and a group related to pain and discomfort (items 5, 8, and 12). Each question is scored on a scale of 1 to 5. The maximum score is 60. The higher the score, the better the quality of life: a score of 57 to 60 corresponds to a satisfactory oral health-related quality of life; a score between 51 and 56 corresponds to an average quality of life; and a score below 50 corresponds to poor oral health.
Time frame: Baseline (T0), T1 (T0 + 3 month), T2 (end of treatment if complementary treatments are required, assessed no later than 1 year after the start of the initial treatment)
Plan to share: Undecided
No publications or documents are linked to this record.
Started Oct 2026 (actual). Primary completion is estimated for Oct 2028, 24 months after the start.
Of 480 non-industry interventional studies with no phase under Periodontitis, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 8 and three quarters within 31. This study's planned 24 months is above that.
Counting every sponsor, half of 494 studies reached it within 16 months; a quarter within 8 and three quarters within 31.
Since we started tracking on Sep 25, 2026, the dates moved once, on Nov 2, 2026: start Sep 2026 → Oct 2026, primary completion Sep 2028 → Oct 2028 and completion Sep 2028 → Oct 2028.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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