Is gingival bleeding a symptom of patients with type 1 von Willebrand disease? A case–control study

Background Von Willebrand disease (VWD) is the most common inherent bleeding disorder resulting in prolonged bleeding time. Gingival bleeding is a frequently reported symptom of VWD. However, gingival bleeding is also known as a leading symptom of plaque-induced gingivitis and untreated periodontal disease. Gingival bleeding in VWD patients (VWD) may be triggered by gingival inflammation and not a genuine symptom. Thus, this study evaluated whether type 1 VWD determines an increased susceptibility to gingival bleeding in response to the oral biofilm. Methods Fifty cases and 40 controls were examined haematologically (VWF antigen, VWF Ristocetin cofactor, factor VIII activity) and periodontally [Gingival Bleeding Index (GBI), bleeding on probing (BOP), Plaque Control Record (PCR), periodontal inflamed surface area (PISA), vertical probing attachment level]. Results GBI was significantly higher in controls (12.2%) than in VWD (10%). The study failed to find a significant difference regarding BOP between VWD (17%) and controls (17.2%). Multiple regressions identified PCR and PISA to be associated with GBI and BOP. VWD was negatively associated with GBI. Smoking and number of remaining teeth was negatively associated with BOP. Conclusion VWD is not associated with a more pronounced inflammatory response to the oral biofilm in terms of GBI and BOP.