1,721,093 research outputs found
Jawbone enlargement using immediate implant placement associated with a split-crest technique and guided tissue regeneration.
No full textFive patients with sufficient vertical bone height but insufficient bone width for implant placement were chosen for treatment with a split-crest technique combined with guided tissue regeneration. The surgical technique involved splitting the alveolar ridge longitudinally in two parts, provoking a greenstick fracture. A chisel was then used to make a fine cut and spread apart the two cortical plates. Implants were then placed. Implants and defects were covered with expanded polytetrafluoroethylene membranes. Biometrical examination showed a gain in bone width, varying between 1 and 4 mm; maxillary sites showed greater ridge enlargement. Histologic examination showed regeneration of bone tissue between the two portions of the split crest. This membrane technique could be effective and predictable for horizontal ridge augmentation associated with immediate implant placement
Rigenerazione guidata dei tessuti in osteointegrazione II - Siti post-estrattivi
No full textLa possibilità di inserire impianti in siti post-estrattivi immediatamente dopo l'avulsione dell'elemento dentario comporta il vantaggio di ridurre il tempo di trattamento e di eliminare il riassorbimento di osso alveolare che avviene dopo ogni avulsione. Le tecniche di rigenerazione guidata dei tessuti sono state proposte da vari Autori al fine di impedire la colonizzazione da parte dei tessuti connettivo ed epiteliale dello spazio tra impianto e pareti dell'alveolo residuo. In questo lavoro vengono descritte due tecniche chirurgiche che prevedono la prima una esposizione precoce della membrana al cavo orale, la seconda una completa copertura della membrana per tutto il periodo di guarigione. I dati ottenuti con le due tecniche sono comparati sotto il profilo biometrico e le membrane esposte vengono esaminate al SEM ed al TEM dal punto di vista microbiologico ultrastrutturale. La tecnica che prevede la completa copertura della membrana per tutto il periodo di permanenza in situ ha fornito i risultati più soddisfacenti.The possibility to introduce implants in fresh extraction sockets offers the advantage of shortening the treatment period and limiting alveolar bone resorption after extraction. Several authors suggested guided tissue regeneration to prevent connective and epithelial tissue proliferation between implant and the residual alveolar space. The present work describes two different surgical techniques. In the former the membrane is exposed soon after placement in the buccal cavity. The later on the contrary is performed with complete closure of the membrane for the whole healing period. The results obtained with both techniques are compared according to their biometrical aspect and the exposed membranes are observed at SEM and TEM with reference to their microbiological structure. The procedure with complete covering of the membrane for the whole healing period gave the most satisfactory results
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