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  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Ligature-induced marginal inflammation around osseointegrated implants and ankylosed teeth. Clinical and radiographic observations in cynomolgus monkeys (Macaca fascicularis). (1993)
    Copenhagen : Munksgaard International Publishers
    Clinical oral implants research 4 (1993), S. 0 
    Details
    ISSN: 1600-0501
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The purpose of the investigation was to gain more understanding of marginal inflammatory reactions around osseointegrated implants. The significance of the lacking periodontal ligament of implants was examined in the initial breakdown phase of supporting tissues by comparing clinical and radiographic manifestations of ligature-induced marginal inflammation related to osseointegrated implants with those around ankylosed and normal control teeth in 8 cynomolgus monkeys (Macaca fascicularis). Bilateral extraction of the first and second mandibular molars was carried out initially, and 12 weeks later 2 implants were placed in each side. Ankylosis of the second maxillary molars was established by extracting and replanting the teeth after a drying period. When ankylosis and osseointegration were established, ligature-induced marginal inflammation was induced in the right or left side at random around implants, ankylosed teeth and normal control teeth (second maxillary premolar) for 7 weeks. Although the clinical manifestations as expressed by plaque score, gingival score, probing depth and attachment loss were quite similar, the radiographic features differed. Significant loss of bone height was limited to implants and ankylosed teeth and did not occur in relation to normal control teeth. Furthermore, the bone loss around implants was significantly greater than the loss around ankylosed teeth. Bone loss was limited to implants and ankylosed teeth; the study therefore suggests that the presence of marginal inflammation around implants and ankylosed teeth may have more serious implications than does marginal inflammation around teeth with a periodontal ligament. However, variations in microbiota and susceptibility of different jaw positions to periodontal breakdown may influence the results of this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0501.1993.040102.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Plaque-induced marginal tissue reactions of osseointegrated oral implants: a review of the literature (1992)
    Copenhagen : Munksgaard International Publishers
    Clinical oral implants research 3 (1992), S. 0 
    Details
    ISSN: 1600-0501
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An intimate contact between bone and titanium implants was first demonstrated in 1969. and since then the bone-implant interface of osseointegrated implants has been investigated extensively. However. investigations of the marginal tissues and the microflora associated with osseointegrated implants have almost exclusively been carried out over the last decade. This review covers the clinical, radiographic, histologic, and microbiologic studies of marginal tissues of osseointegrated oral implants. In general, successfully osseointegrated implants exhibit low amounts of plaque con-comitant with the absence of marginal inflammation. However, plaque accumulation may cause inflammatory reactions around the implants, sometimes giving rise to mucosal hyperplasia. Apparently, keratinized mucosa is not a requisite for the maintenance of peri-implant health if oral hygiene is adequate, but the presence of peri-implant keratinized mucosa is generally advocated. Alveolar bone loss around successful implants is minimal, but significant focal loss may occur due to plaque-induced inflammation or perhaps repeatedly extensive implant load. The progression of plaque-induced alveolar bone loss of osseointegrated implants may be different from that of teeth. It is unknown whether simultaneous marginal inflammation and excessive implant load further increase the loss of alveolar bone height. Both the light microscopic and ultrastructural characteristics of marginal tissues of implants and teeth are similar except for a lack of root cementum with inserting gingival collagen fibers of implants. Clinical inflammatory reactions are histologically characterized by an increased number of inflammatory cells infiltrating the connective tissue. The scattered subgingival microbiota associated with osseointegrated implants surrounded by healthy or slightly inflamed marginal tissues is similar to that of teeth with healthy gingiva. The microbiota associated with implants affected by marginal inflammation and bone loss is complex and consists predominantly of gram-negative anaerobic rods: this. again, is a similarity to periodontal disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0501.1992.030401.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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