2-years retrospective observational case-control study on survival and marginal bone loss of implants in patients with hereditary coagulopathies

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Background: Evaluating 2-years implant loss and marginal bone loss in patients with hereditary coagulopathies, comparing with a healthy control group. Material and Methods: 37 implants in 13 patients (17 haemophilia A, 20 Von-Willebrand disease) versus 26 im plants in 13 healthy patients. Data measured through Lagervall-Jansson index (after surgery, at prosthetic loading, at 2 years). Statistics: Chi-square, Haberman's, ANOVA, Mann-Whitney-U. Significance p<0.05. Results: Haemorrhagic accidents in 2 coagulopathies patients (non-statistical differences). Hereditary coagulopa thies patients suffered more hepatitis (p<0.05), HIV (p<0.05) and less previous periodontitis (p<0.01). Non-sta tistical differences in marginal bone loss among groups. 2 implants were lost in the hereditary coagulopathies and none in the control group (non-statistical differences). Hereditary coagulopathies patients had longer (p<0.001), and narrower implants (p<0.05) placed. 43.2% external prosthetic connection in hereditary coagulopathies pa tients (p<0.001); change of prosthetic platform more frequent in control group (p<0.05). 2 implants lost: external connection (p<0.05). Survival rate 96.8% (hereditary coagulopathies 94.6%, control group 100%). Conclusions: Implant and marginal bone loss at 2 years is similar in patients with hereditary coagulopathies and control group. Precautions should be taken on the treatment for hereditary coagulopathies patients, through prior haematological protocol. Implant loss only occurred in in a patient with Von-Willebrand´s disease.

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