GingivaNCT06981871
Prevalence of Lower and Upper Incisor Periodontal Phenotypes and Risk Indicators.
An observational study of Gingiva and Phenotype, run by Centre Hospitalier Universitaire de Nice at 1 site in France.
Trial summary
The determination of the periodontal phenotype is an essential part of the periodontal diagnostic process, which must guide not only treatment but also prognosis (Kim et al. 2020). Read more about this study
- Who is it for?
- Ages 18 years and older
- What is being tested?
- Evaluation of the gingival phenotype of the incisors in the upper and lower jaws
- How many people
- 245 participants
- Where
- 1 siteFrance
- Study dates
- 1 Jun 2025to 1 Nov 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Adult, Older adult
Study population: Dental students at the university hospitals of Nice and Nancy (France)
Who may be able to join
- Age (18 years old or older),
- Dental student on the university hospitals of Nice and Nancy.
- Social security affiliate.
- Systemically healthy.
- Healthy and intact periodontium.
- Informed consent.
Who cannot join
- Pregnancy.
- Under any regular medical treatment.
- Active periodontal disease.
- Enduring orthodontic treatment.
- Periodontal surgery in the mandibulary anterior region.
- Non consent patient.
- Patient under judgment trials.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Prevalence of Lower and Upper Incisor Periodontal Phenotypes and Risk Indicators in French Dental Students: a Bicentric Cross-sectional Study
The determination of the periodontal phenotype is an essential part of the periodontal diagnostic process, which must guide not only treatment but also prognosis (Kim et al. 2020).
This determination is based on the clinical assessment of 3 individual variables: gingival height/thickness and alveolar bone cortical thickness. Although these anatomical characteristics are genetically determined, they are also influenced by numerous acquired, endogenous or exogenous factors that can act at a general and/or local level. The periodontal phenotype is therefore specific to an individual and its 3 components vary over time according to the dental sectors and sites of each individual. For example, the morphology of this phenotype varies according to whether the gingiva is thick or thin, high or reduced, and the bone cortex is thick or thin, with all possible combinations. Clinicians need to know the distribution of these different types of phenotypes, particularly in the aesthetic areas they are concerned with, in order to better identify the most fragile ones in the face of the multiple daily stresses to which the periodontium may be subjected: muscular force, dental plaque, oral hygiene manoeuvres, parafunctionality, dental procedures....
However, studies on the prevalence of the periodontal phenotype are limited and mainly concern Asian, Indian and American populations, with very few studies on European populations. Main objective: To assess the prevalence of periodontal phenotypes in the upper and lower incisors of French subjects, according to tooth type and at the individual level. Secondary objective: Identification of potential risk indicators in relation to the type of periodontal phenotype."
- Being tested
- Evaluation of the gingival phenotype of the incisors in the upper and lower jaws
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Evaluation of the gingival phenotype of the incisors in the upper and lower jawsOther
Assessment of gingival thickness (Kan et al 2015) and keratinised tissue height of the incisors with UNC-15 peridontal probe (Hu-Freidy, USA) and clinical photography.
What is being measured
The primary outcome is the main question the study is designed to answer.
Prevalence of gingival phenotypes (gingival thickness )
Assessment of gingival thickness
Measured: At the inclusion
Prevalence of gingival phenotypes (keratinised tissue height)
Evaluation of keratinised tissue height of the lower and upper incisors with UNC-15 peridontal probe (mm) and clinical photography.
Measured: At the inclusion
Prevalence of gingival phenotypes (Photography)
Description of the gingiva
Measured: At the inclusion
Secondary outcomes (2)
Associated risk indicators for thin gingival phenotype ( Clinical description)
Global description clinical multiples evaluations ( Age, gender, smoking habit, orthodontic background, oral hygiene habit, oral ventilation, dysfunction, facial typology, chin shape, visibility of vascularisation and root convexity through the gum, gingival récession (Cairo), freinal insertion and skin type).
Measured: At the inclusion
Associated risk indicators for thin gingival phenotype ( orthodontic and facial characteristics )
Global description clinical evaluation based on photographs.
Measured: At the inclusion
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 May 2025
- Study start1 Jun 2025
- Primary completion1 Nov 2026 (estimated)
- Study completion1 Nov 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for GingivaStudies of the same condition, open and under way.
- More trials run by Centre Hospitalier Universitaire de NiceThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 245 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Centre Hospitalier Universitaire de Nice
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06981871
- Sponsor's protocol ID
- 25Odonto02
- Status last verified
- Sep 2026
- First submitted
- 13 May 2025
- Last updated
- 18 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 18 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Prevalence of Lower and Upper Incisor Periodontal Phenotypes and Risk Indicators in French Dental Students: a Bicentric Cross-sectional Study
- ClinicalTrials.gov ID
- NCT06981871
- Acronym / sponsor ID
- 25Odonto02
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 245 participants (estimated)
- Lead sponsor
- Centre Hospitalier Universitaire de NiceUniversity, hospital or other
- Study start
- 1 Jun 2025 (actual)
- Primary completion
- 1 Nov 2026 (estimated)
- Study completion
- 1 Nov 2026 (estimated)
- First posted
- 21 May 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The determination of the periodontal phenotype is an essential part of the periodontal diagnostic process, which must guide not only treatment but also prognosis (Kim et al. 2020).
This determination is based on the clinical assessment of 3 individual variables: gingival height/thickness and alveolar bone cortical thickness. Although these anatomical characteristics are genetically determined, they are also influenced by numerous acquired, endogenous or exogenous factors that can act at a general and/or local level. The periodontal phenotype is therefore specific to an individual and its 3 components vary over time according to the dental sectors and sites of each individual. For example, the morphology of this phenotype varies according to whether the gingiva is thick or thin, high or reduced, and the bone cortex is thick or thin, with all possible combinations. Clinicians need to know the distribution of these different types of phenotypes, particularly in the aesthetic areas they are concerned with, in order to better identify the most fragile ones in the face of the multiple daily stresses to which the periodontium may be subjected: muscular force, dental plaque, oral hygiene manoeuvres, parafunctionality, dental procedures....
However, studies on the prevalence of the periodontal phenotype are limited and mainly concern Asian, Indian and American populations, with very few studies on European populations. Main objective: To assess the prevalence of periodontal phenotypes in the upper and lower incisors of French subjects, according to tooth type and at the individual level. Secondary objective: Identification of potential risk indicators in relation to the type of periodontal phenotype."
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Age groups
- Adult, Older adult
- Study population
- Dental students at the university hospitals of Nice and Nancy (France)
Key inclusion criteria (6 listed)
- Age (18 years old or older),
- Dental student on the university hospitals of Nice and Nancy.
- Social security affiliate.
- Systemically healthy.
- Healthy and intact periodontium.
Key exclusion criteria (7 listed)
- Pregnancy.
- Under any regular medical treatment.
- Active periodontal disease.
- Enduring orthodontic treatment.
- Periodontal surgery in the mandibulary anterior region.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Evaluation of the gingival phenotype of the incisors in the upper and lower jawsAssessment of gingival thickness (Kan et al 2015) and keratinised tissue height of the incisors with UNC-15 peridontal probe (Hu-Freidy, USA) and clinical photography. | Other | – |
Primary outcome
Prevalence of gingival phenotypes (gingival thickness )
Time frame: At the inclusion
Assessment of gingival thickness
Prevalence of gingival phenotypes (keratinised tissue height)
Time frame: At the inclusion
Evaluation of keratinised tissue height of the lower and upper incisors with UNC-15 peridontal probe (mm) and clinical photography.
Prevalence of gingival phenotypes (Photography)
Time frame: At the inclusion
Description of the gingiva
2 secondary outcomes
Associated risk indicators for thin gingival phenotype ( Clinical description)
Time frame: At the inclusion
Associated risk indicators for thin gingival phenotype ( orthodontic and facial characteristics )
Time frame: At the inclusion
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Sep 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Gingiva and Phenotype, run by Centre Hospitalier Universitaire de Nice at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 18 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Prevalence of gingival phenotypes (gingival thickness ) (time frame: At the inclusion). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Sep 2026.