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Features include very common findings: Gingival fragility, Gingival recession, Pretibial hyperpigmentation, and Bruising susceptibility and others; and common findings: Fragile skin, Atrophic scars, Hyperextensible skin, and Sideways curvature of the spine (scoliosis) and others. 31 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Skin | 6 | Palmoplantar cutis laxa, Fragile skin, Pretibial hyperpigmentation |
Bones and joints | 6 | Generalized joint hypermobility, Joint dislocation, Alveolar bone loss around teeth |
Blood and immune system | 3 | Autoimmunity, Recurrent infections, Gingival bleeding |
Digestive system | 1 | Intestinal perforation |
Growth and development | 1 | Tall stature |
Periodontal EDS (pEDS) is characterized by distinct oral manifestations. Early and severe breakdown of the tooth-supporting tissues (i.e., alveolar bone, periodontal ligament, root cementum, and gingival attachment) result in premature loss of teeth. Lack of attached gingiva and thin and fragile gums lead to gingival recession. Connective tissue abnormalities of pEDS typically include easy bruising, pretibial plaques, distal joint hypermobility, hoarse voice, and less commonly manifestations such as organ or vessel rupture . Since the first descriptions of pEDS in the 1970s , 148 individuals have been described in 34 case reports, seven pedigree analyses, and two cohort studies [, , , , ]. The following description of the phenotypic features associated with this condition is based on these reports. However, in-depth description of non-oral manifestations in newly diagnosed individuals with a molecularly confirmed diagnosis of pEDS will be important to further define the clinical features. Table 2. Periodontal Ehlers-Danlos Syndrome: Frequency of Select Features
Feature | % of Personswith Feature | Comment |
|---|---|---|
Dental | Severe early-onset periodontitis | 99% |
Receding gums | 98% of adults | — |
Generalized lack of attached gingiva | 93% | Identification requires clinical expertise; appears to be pathognomonic for pEDS but not assessed/reported in all persons w/pEDS. |
Easy bruising | 96% | Mainly on the shins, but also in unusual areas (e.g., cheeks thighs) |
Pretibial plaques | 83% | Also reported as pretibial (hemosiderin) discolorations |
Skin fragility, atrophic scarring, delayed wound healing | 50% | — |
Joint hypermobility | 44% | Previously reported as mainly affecting the small joints |
Arterial aneurysms/dissections | 8/145 | Abdominal aorta (n=2), carotid artery (2), cerebral artery (3), unknown location (1) |
Brain white matter abnormality | 8/8 | Reported in all adults who had a brain MRI |
Organ rupture | 2/145 | Lung, diaphragm, intestine, small bowel, eardrum Based on , Dental Findings Periodontitis with early onset was reported in 98.4% of affected adults . To date, detailed descriptions of periodontal and dental characteristics of pEDS are lacking. |
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
C1R encodes complement C1r (705 aa). Serine protease component of the complement C1 complex, a multiprotein complex that initiates the classical pathway of the complement system, a cascade of proteins that leads to phagocytosis and breakdown of pathogens and signaling that strengthens the adaptive immune system.
Ehlers-Danlos syndrome, periodontal type 1 is associated with mutations in the C1R gene on chromosome 12.
The C1R protein participates in C1R C-terminal fragment, C1R N-terminal fragment, and Activation of C1r pathways.
C1R is classified as a druggable target (Druggable Genome, Enzyme, and Protease categories) with score 0.6.
No genotype-phenotype correlations in pEDs have been identified.
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
The penetrance in affected individuals identified to date is 100%. However, it is age-related: periodontitis may be absent in young individuals, particularly those with good dental hygiene .
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Formal clinical diagnostic criteria for periodontal Ehlers-Danlos syndrome (pEDS) were established in the 2017 revised Ehlers-Danlos syndrome nosology .
Periodontal Ehlers-Danlos syndrome (pEDS) should be suspected in adults with a combination of the following major and minor criteria and family history .
Clinical Findings
Major criteria
Severe periodontitis of early onset (childhood or adolescence)
Generalized lack of attached gingiva (Complete lack of attached gingiva is considered pathognomonic for pEDS .)
Pretibial plaques (i.e., hemosiderin deposition)
Family history of a first-degree relative who meets diagnostic criteria (Absence of a known family history does not preclude the diagnosis.)
Minor criteria
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Periodontal EDS (pEDS) must be distinguished from genetic disorders that include periodontitis and/or other features associated with pEDS and acquired periodontitis. The gingival phenotype as well as age of onset may be useful in differentiating pEDS from these conditions. Note: The current classification of periodontal diseases distinguishes "periodontitis as a complex genetic disorder" (i.e., "acquired periodontitis") from "periodontitis as a manifestation of systemic diseases" – which includes periodontal EDS. Genetic Disorders Table 3. Genetic Disorders Associated with Oral Manifestations in the Differential Diagnosis of Periodontal Ehlers-Danlos Syndrome
Disorder | Gene(s) | MOI | Manifestations | Other Features |
|---|---|---|---|---|
COL3A1 | AD(AR) |
Genetic testing for C1R is available. Testing is considered confirmatory for diagnosis.
No approved treatments are currently available for Ehlers-Danlos syndrome, periodontal type 1. The disease remains an area of unmet medical need.
At this point no clinical practice guidelines for periodontal Ehlers-Danlos syndrome (pEDS) have been published. However, some recommendations exist [Authors, personal observation]. Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with periodontal Ehlers-Danlos syndrome, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended. Table 4. Recommended Evaluations Following Initial Diagnosis in Individuals with Periodontal Ehlers-Danlos Syndrome
System/Concern | Evaluation | Comment |
|---|---|---|
Receding gums | Clinical periodontal investigations, dental radiographs | Requires a periodontist or a dentist specializing in periodontology Easy bruising / |
Scarring | Clinical assessment by dermatologist | Neurologic |
manifestations | Clinical assessment by consultant neurologist | Brain MRI, as white matter abnormalities of unknown clinical significance to date have been reported in persons w/pEDS |
Joint hypermobility | Clinical assessment | Typically by consultant who diagnosed pEDS |
Aneurysms | Imaging of the arterial tree in adults | — |
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Currently, evidence does not support a general recommendation that persons with pEDS avoid any specific activities/treatment/medications. However, this may vary on an individual basis; for example, in an individual with pEDS and arterial aneurysms, activities such as high-impact sports and weight lifting would be actively discouraged.
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Search ClinicalTrials.gov in the US and EU Clinical Trials Register in Europe for access to information on clinical studies for a wide range of diseases and conditions. Note: There may not be clinical trials for this disorder.
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
View trials for Ehlers-Danlos syndrome, periodontal type 1
Table 6.
Recommended Surveillance for Individuals with Periodontal Ehlers-Danlos Syndrome
System/Concern | Evaluation | Frequency
Early-onset severe
periodontitis | Detailed periodontal eval | At least annually
Supportive periodontal care incl reeval of periodontal parameters, oral hygiene instructions (e.g., use of interdental cleaning devices and electric toothbrushes), supra- sub-gingival debridement | The appropriate interval between periodontal maintenance visits should be ~3-6 mos based on the needs of the patient
Joint hypermobility
w/(sub)luxations
joint pain | By consultant rheumatologist, PT, OT | Depends on the specific concern(s)
Risk of arterial
aneurysm/
dissection | Some EDS services offer surveillance of the arterial tree in asymptomatic adults w/pEDS, w/multidisciplinary input in case of identified arterial aneurysm/dissection, but evidence for this approach is limited as the risk of arterial aneurysm/dissection in those w/pEDS is unknown but appears lower than in vEDS. | Surveillance of the arterial tree in asymptomatic adults is offered w/a frequency of 1.5-2 yrs by some EDS services.
OT = occupational therapist; PT = physical therapist
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Phenotype severity distribution: 6 very common features, 7 common features.
No clinical trials have been registered for Ehlers-Danlos syndrome, periodontal type 1.
1 publication has been identified in PubMed for Ehlers-Danlos syndrome, periodontal type 1. Research spans Basic Science / Preclinical (100%).
Qu C (2025). [PMID: 40214433](https://pubmed.ncbi.nlm.nih.gov/40214433/). *Cells*. [Basic Science / Preclinical]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 12:40 AM UTC
Online Mendelian Inheritance in Man
Common questions about Ehlers-Danlos syndrome, periodontal type 1
Gingival recession, gingival fragility, bleeding gums.1 vEDS is not assoc w/early severe periodontitis.
Bruising unrelated to identified trauma /or in unusual sites. vEDS is not assoc w/pretibial plaques. |
Aneurysms/arterial rupture organ ruptures (aneurysms organ ruptures suggestive of vEDS also reported in pEDS but much less frequently; prematurely aged appearance, prominent eyes, attached earlobes, acrogeric changes of hands feet, hypermobility of small joints |
Hereditary angioedema (OMIM 106100) | SERPING1(C1INH) | ADAR | Periodontal bone loss in conjunction w/episodes of acute gingival edema | Angioedematous attacks Hypophosphatasia |
ALPL | ADAR | Premature loss of primary secondary teeth | Recurrent fractures; osteomalacia; rickets, serum alkaline phosphatase, urinary phosphoethanolamin Kindler syndrome | — |
FERMT1 | AR | Early severe periodontitis | Congenital blistering, skin atrophy, photosensitivity, skin fragility | Odontohypophos-phatasia (See Hypophosphatasia.) |
ALPL | ADAR | Premature loss of primary secondary teeth | serum alkaline phosphatase, urinary phosphoethanolamin Papillon-Lefevre syndrome (OMIM 245000) | — |
CTSC | AR | Severe periodontitis w/early-childhood onset | Hyperkeratosis of palms soles | Severe congenital neutropenia (OMIM PS202700) |
WAS | ADARXL | Severe periodontitis w/early-childhood onset | Recurrent severe infections, hematologic findings Singleton-Merten syndrome (OMIM 182250, 616298) | DDX58 |
IFIH1 | AD | Premature loss of teeth, short tooth roots | AD = autosomal dominant; AR = autosomal recessive; EDS = Ehlers-Danlos syndrome; MOI = mode of inheritance; XL = X-linked 1. | — |
Source: GeneReviews — "Periodontal Ehlers-Danlos Syndrome"
Hoarse voice | ENT consultation | Clinical assessment Genetic |
counseling | By genetics professionals1 | To inform patients families re nature, MOI, implications of pEDS in order to facilitate medical personal decision making Family support resources |
Treatment of Manifestations in Individuals with Periodontal Ehlers-Danlos Syndrome Manifestation/Concern | Treatment | Considerations/Other |
Severe early-onset periodontitis | Periodontal treatment | — |
Receding gums | No treatment | Surgical treatment of gingival recession in general is possible; however, no experience exists w/pEDS.; Oral hygiene instructions for gentle cleaning (e.g., w/soft toothbrushes) recommended Easy bruising / Scarring |
hypermobility | Assessment by consultant rheumatologist to advise re need for PT, OT, pain management, appropriate exercise | General advice for those w/joint hypermobility can be followed w/moderate exercise PT input when necessary Arterial aneurysms/ |
dissection | Depending on nature location, surgical intervention is possible/required or treatment can be conservative (i.e., rpt imaging, anti-hypertensive medication, advice re exercise). | Gastrointestinal |
rupture | Surgical intervention | — |
Hoarse voice | Intervention depends on the primary cause. | Surgical intervention for vocal cord stenosis has been reported. OT = occupational therapy; PT = physical therapy Surveillance Table 6. |