An observational study in Gingiva and Phenotype, sponsored by Centre Hospitalier Universitaire de Nice. Active, not recruiting at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-18.
Sponsored by Centre Hospitalier Universitaire de Nice · Observational
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."
Centre Hospitalier Universitaire de Nice is the lead sponsor of 709 studies on the registry; 176 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Dental students at the university hospitals of Nice and Nancy (France)
Exclusion Criteria:
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.
Prevalence of gingival phenotypes (gingival thickness )
Assessment of gingival thickness
Time frame: 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.
Time frame: At the inclusion
Prevalence of gingival phenotypes (Photography)
Description of the gingiva
Time frame: At the inclusion
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).
Time frame: At the inclusion
Associated risk indicators for thin gingival phenotype ( orthodontic and facial characteristics )
Global description clinical evaluation based on photographs.
Time frame: At the inclusion
This study is active, not recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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Centre Hospitalier Universitaire de Nice