Long‐Term Outcome of Implant Rehabilitations in Patients with Systemic Disorders and Smoking Habits: A Retrospective Clinical Study

BACKGROUND: There is a need for more studies investigating the outcome of implant-supported rehabilitations in patients with systemic disorders. MATERIALS AND METHODS: This retrospective clinical study included 721 patients with systemic disorders or smoking habits (422 females; 299 males), with an average age of 51 years, rehabilitated with 3,998 implants and followed for 3-17 years (average 8 years). Outcome measures were: implant survival rates calculated based on implant function through life tables and using the patient (first implant failure censored) and implant as units of analysis; marginal bone levels measured at 1, 5, and 10 years; and the incidence of biological complications (peri-implant pathology, abscess formation, fistula formation, and suppuration). RESULTS: Eighty-seven patients were lost to follow-up (12%). Forty-five patients experienced prosthetic failure rendering a 94.3% survival rate. One hundred seventy-three implants failed in 98 patients, rendering an 83.5% (patient level) and 94.6% (implant level) cumulative survival rate. The average marginal bone levels were 1.18 mm, 1.56 mm, and 1.47 mm at 1, 5, and 10 years, respectively. Biological complications occurred in 86 patients (11.9%). CONCLUSIONS: Implant rehabilitations in patients presenting systemic disorders or smoking habits are possible with good outcomes. Nevertheless, different impacts on implant rehabilitations were registered according to the type of systemic disorder.