PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 9100205

Failing hollow implants examined by light microscopy and image processing.

F Takeshita·S Iyama·Y Ayukawa·T Suetsugu·M Oishi
View original source ↗Export metadata ↓

Abstract

The purpose of this study was to evaluate the radiologic, histologic, and histometric findings of three failing hollow implants. On periapical radiographs, these implants showed vertical bone loss up to the hollow portion around the implant. Examination of the histologic sections disclosed that the hollow portions of all the implants were almost filled with bone tissue, although slight bone resorption and presence of granulation tissue infiltrated with inflammatory cells was observed coronal to the hollow portion. Histometric analysis disclosed that the average percent bone contact was 93.1% in case 1, 90.9% in case 2, and 84.3% in case 3 and the average percent bone filling was 42.1%, 50.5%, and 33.8%, respectively. Consequently, there seems to be some potential for successful treatment of these implants because the destructive changes were limited to the coronal aspects of the implant.

Explore related subjects

Alveolar Bone LossAlveolar ProcessBone MarrowBone ResorptionDental Implantation, EndosseousDental ImplantsDental Prosthesis DesignDental Restoration FailureFemaleGranulation TissueHumansImage Processing, Computer-AssistedMiddle AgedOsseointegrationOsteoclastsPeriapical TissueRadiographySurface PropertiesCase ReportsJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

F Takeshita, S Iyama, Y Ayukawa, T Suetsugu, M Oishi. 1997. Failing hollow implants examined by light microscopy and image processing.. https://doi.org/10.1902/jop.1997.68.3.293

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2007

Rat model of polymicrobial infection, immunity, and alveolar bone resorption in periodontal disease.

One of the predominant polymicrobial infections of humans is expressed clinically as periodontal disease. Porphyromonas gingivalis, Treponema denticola, and Tannerella forsythia have been strongly implicated as members of a pathogenic consortium in the etiology of adult periodontitis. In this study we hypothesized that P. gingivalis, T. denticola, and T. forsythia are synergistic in terms of virulence potential and induce chronic periodontal inflammation that leads to alveolar bone resorption in a polymicrobial infection in rats. Groups of rats were infected with either P. gingivalis, T. denticola, or T. forsythia in monomicrobial infections or with all three species in polymicrobial oral infections with or without Fusobacterium nucleatum. PCR analyses of oral microbial samples demonstrated that rats infected with one bacterium were orally colonized by each of the bacteria during the study interval, and increased serum immunoglobulin G (IgG) antibody levels substantiated the interaction of the host with the infecting bacteria. PCR analyses of the rats with polymicrobial infections demonstrated that most rats were infected with P. gingivalis, T. denticola, and T. forsythia as a consortium. Furthermore, all rats exhibited a significant increase in the level of IgG antibody to the polymicrobial consortium. Radiographic measurement of alveolar bone resorption showed that rats infected with the polymicrobial consortium with or without F. nucleatum exhibited significantly increased alveolar bone resorption compared to the resorption in uninfected control rats, as well as the resorption in rats infected with one of the microbes. These results documented that P. gingivalis, T. denticola, and T. forsythia not only exist as a consortium that is associated with chronic periodontitis but also exhibit synergistic virulence resulting in the immunoinflammatory bone resorption characteristic of periodontitis.

Alveolar Bone Loss↗
PubMed2007

Sinus lifting before Le Fort I maxillary osteotomy: a suitable method for oral rehabilitation of edentulous patients with skeletal class-III conditions: review of the literature and report of a case.

BACKGROUND: Functional rehabilitation of patients afflicted with severe mandibular and maxillary alveolar atrophy might be challenging especially in malformed patients. METHODS: Treatment planning using sinus lifting and implant placement before Le Fort I maxillary osteotomy in a patient with severe mandibular and posterior maxillary alveolar atrophy and skeletal class-III conditions due to cleft palate are described. RESULTS: A full functional and esthetic rehabilitation of the patient was achieved by a stepwise surgical approach performed through sinus lifting as the primary approach followed by implant placement and subsequent Le Fort I maxillary osteotomy to correct the maxillo-mandibular relation. CONCLUSION: Stabilisation of the maxillary complex by a sinus lifting procedure in combination with computer aided implant placement as preorthodontic planning procedure before Le Fort I maxillary osteotomy seems to be suitable in order to allow ideal oral rehabilitation especially in malformed patients.

Alveolar Bone Loss↗
PubMed2007

[A new technique for transcrestal sinus floor elevation with press-fit bone cylinders (dowel lift): short communication of the first in vitro results].

The minimally invasive sinus floor elevation as first described by Summers is limited in augmentation volume, whereas a more invasive approach is required for the technique of Tatum for larger bone defects. We developed a new technique for the transcrestal elevation of the sinus floor with bone dowels using a press-fit technique (dowel lift). We present the technique with first in vitro results in a fresh, unpreserved, human cadaver.

Alveolar Bone Loss↗