Abstract
The aim of this prospective study was to assess the outcomes of an implant maintenance protocol for implants supporting a full-arch rehabilitation. Sixty-one patients (28 women and 33 men) treated with immediately loaded full-arch rehabilitation, both mandibular and maxillary, supported by a combination of two tilted and two axial implants, were included in the study. Patients were scheduled for follow-up visits every 6 months for +2 years, then yearly up to 4 years. Each patient received professional oral hygiene treatment and detailed oral hygiene instructions. During each visit, modified plaque index, bleeding index and probing depth were assessed. The presence of peri-implant tissue inflammation was also evaluated. Mean observation time, considering both mandible and maxilla, was 18.3 months ranging from 6 months to 5 years. Both plaque and bleeding indexes frequency decreased over time. Probing depth was stable (2.46 ± 0.5 mm at 4 years). Only three implants were lost due to peri-implantitis (1.4% at 12 months), whereas the incidence of peri-implant mucositis was less than 10% in each considered period. The adoption of a systematic hygienic protocol is effective in keeping low the incidence of peri-implant mucositis as well as in controlling plaque accumulation and clinical attachment loss.
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