Oral phenotype and scoring of vascular Ehlerse-Danlos syndrome: a case-control study

Objective: Vascular Ehlers-Danlos syndrome (vEDS) is a rare genetic condition related to mutations in the COL3A1 gene responsible of vascular digestive and uterine accidents. Difficulty of clinical diagnosis has led to the design of diagnostic criteria summarised in the Villefranche classification. The goal was to assess oral features of vEDS. Gingival recession is the only oral sign recognised as a minor diagnostic criterion. The authors aimed to check this assumption since bibliographical search related to gingival recession in vEDS proved scarce. Design: Prospective case-control study. Setting: Dental surgery department in a French tertiary hospital. Participants: 17 consecutive patients with genetically proven vEDS aged 19-55 years were compared with 46 age-and sex-matched controls. Observations: Complete oral examination (clinical and radiological) with standardised assessment of periodontal structure temporomandibular joint function and dental characteristics were performed. COL3A1 mutations were identified by direct sequencing of genomic or complementary DNA. Results: Prevalence of gingival recession was low among patients with vEDS as for periodontitis. Conversely patients showed marked gingival fragility temporomandibular disorders dentin formation defects molar root fusion and increased root length. After logistic regression three variables remained significantly associated to vEDS. These variables were integrated in a diagnostic oral score with 87.5% and 97% sensitivity and specificity respectively. Conclusions: Gingival recession is an inappropriate diagnostic criterion for vEDS. Several new specific oral signs of the disease were identified whose combination may be of greater value in diagnosing vEDS.