Avaliação clínica e histológica de implantes imediatos e tardios associados a matriz óssea xenógena e membranas: acompanhamento de 10 anos / Clinical and histological evaluation of immediate and late implants associated with xenogeneous bone matrix and membranes: 10 years follow-up

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The aim of this research is to evaluate the clinical and histological findings of installed implants immediately after exodontics (Group 1) and later after the alveolus regeneration (Group 2). In both groups, xenogeneous lyophilized bone matrix was used in association with resorbable bovine collagen membrane and/or nonresorbable expanded politetrafluoretane membrane (PTFE - e) following the guided tissue regeneration principles. 20 patients, 10 in each group, were clinically followed during 10 years, submitted to clinical analysis during intervals of 1, 3, 5 and 10 years, and to histological analysis of the neoformed alveolar bone after 6 months of grafting. The patients were clinically evaluated as for signs and symptoms of periodontal disease by means of probing depth. The histological evaluation of the previously prepared laminae were performed after qualitative classification of bone formation and of possible biomaterial remnants. The clinical aspects (probing of depth and marginal bleeding index) in groups 1 and 2 were similar. After a subjective analysis, it could be verified that the patients in both groups performed an acceptable maintenance of oral hygiene, promoting, in such way, an insignificant index of periodontal disease signs and symptoms. The histological analysis of both groups were equivalent. For this reason, the histological analysis of the neoformed bone region after the determined period revealed the degree of maturation of the remodelated bone at the periimplant surface where the xenogeneous graft was placed, consistent with the expected osseointegration scenario. The xenogenic grafts associated with membranes perform the maintenance of the alveolar ridge for implant installation and prosthetic rehabilitation, either immediately after extraction or later after extraction and alveolus filling.

ASSUNTO(S)

implante membrane bone graft enxerto ósseo implant membrana

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