S6 |
CATON et al .
TABLE 4
Peri‐implantitis Peri‐implantitis was defined as a plaque‐associated pathologic condi‐ tion occurring in the tissue around dental implants, characterized by inflammation in the peri‐implant mucosa and subsequent progressive loss of supporting bone. 29 Peri‐implant mucositis is assumed to pre‐ cede peri‐implantitis. Peri‐implantitis is associated with poor plaque control and with patients with a history of severe periodontitis. The onset of peri‐implantitis may occur early following implant placement as indicated by radiographic data. Peri‐implantitis, in the absence of treatment, seems to progress in a non‐linear and accelerating pattern. 29
Hard and soft tissue implant site deficiencies Normal healing following tooth loss leads to diminished dimensions of the alveolar process/ridge that result in both hard and soft tissue de‐ ficiencies. Larger ridge deficiencies can occur at sites associated with severe loss of periodontal support, extraction trauma, endodontic in‐ fections, root fractures, thin buccal bone plates, poor tooth position, injury and pneumatization of the maxillary sinuses. Other factors af‐ fecting the ridge can be associated with medications and systemic dis‐ eases reducing the amount of naturally formed bone, tooth agenesis, and pressure from prostheses. 31
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