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Survival rates of dental implants in patients with and without a history of periodontitis
EAO Online Library. CHATZOPOULOS G. Oct 9, 2018; 232472; P- PB- 20
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Dental implants have increased their reputation during the last several years because of their predictable outcomes. The frequency of implant failure has been reported to be within 5% of all placed implants which may increase in patients with a history of periodontal disease. Severe periodontitis exerts the effect in the rate of biological complications and leads to higher incidence of implant failure. One of the key factors for the success of implant therapy is appropriate patient selection.**It was hypothesized that patients with periodontal disease exhibit higher failure rates than those with no history of periodontitis. The aim of this study was to evaluate the differences between the survival rates of implants placed in patients with and without periodontal disease. **Dental records of patients who received implant therapy were retrieved from the electronic records of a university dental clinic. Implants placed in adults with a full-mouth series of radiographs were included in the study and the severity of periodontal disease was determined based on the percentage of bone loss (none to mild, moderate, severe). Demographic characteristics, dental insurance status, socioeconomic status as well as medical history and tobacco use were recorded. Treatment outcome was included as a binary variable (survival failure). Time to failure (date of procedure to date of visit with failure) was compared between implants placed in patients with and without periodontitis in Cox regression models. Kaplan-Meier plots were also created for the survival of both implant groups. Patient-sites without a failure were censored at the last follow-up visit. All tests of significance were evaluated at the 0.05 error level.**A total of 717 records of dental implants were included in the analysis. 50.3% of them were placed in females, 82.6% in individuals with high socio-economic status, 64.9% in self-payers, 14.5% in tobacco users and 9.9% in diabetics. None to mild periodontal destruction was noted in 66.7% of the patients, while moderate and severe was detected in 33.3%. Within a mean follow-up time of 29.19 months, five implants were removed representing a 0.7% failure rate. The survival rate in the periodontitis and non-periodontitis groups showed no statistically significant differences (p = 0.837). Periodontitis patients showed a 99.2% survival rate and both implants that failed were removed at least 2 years after their placement. Patients with dental insurance (p = 0.035) and a history of kidney disease (p < 0.001) were significantly associated with implant failure. Within the limitations of this retrospective university-based study, no statistically significant differences with respect to survival rates between patients with and without a history of periodontitis were disclosed. This study demonstrated that placing implants in patients with a history of periodontal disease is a sound and safe treatment option with a predictable treatment outcome. **
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