Navegando por Palavras-chave "dental implants"

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    Histologic and histomorphometric evaluation of a synthetic bone substitute for maxillary sinus grafting in humans
    (Wiley-Blackwell, 2013-08-01) Tosta, Mauro; Cortes, Arthur R. G.; Correa, Luciana; Pinto, Decio dos S.; Tumenas, Isabel [UNIFESP]; Katchburian, Eduardo [UNIFESP]; CETAO; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)
    Objective: the present study investigated the efficacy of a biphasic calcium phosphate as a bone grafting material for maxillary sinus augmentation in humans.Materials and methods: Half of the thirty patients selected for sinus augmentation were grafted with biphasic calcium phosphate, whereas the other half were grafted with autogenous bone chips harvested intraorally. After 9 months of healing, bone cores were retrieved from implant sites for histologic and histomorphometric evaluation.Results: the areas augmented with autogenous bone chips showed newly formed bone with a pattern very similar to that of the native area. Histomorphometry demonstrated that the amount of newly formed bone in the autogenous bone group was significantly greater than in the biphasic calcium phosphate group (P < 0.05). in the biphasic calcium phosphate group, less bone formation was observed in the area further away from native bone interface than in the area closer to native bone interface (P < 0.05), whereas no significant differences were observed between both areas in the autogenous group. in both groups, the implant survival rate was 100% with a minimum 1-year follow-up.Conclusion: the data presented in this work confirm the osteoconductive properties of biphasic calcium phosphate, as well as its use in association with maxillary sinus floor augmentation procedures with successful outcomes.
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    The success of endosseous implants in human immunodeficiency virus-positive patients receiving antiretroviral therapy A pilot study
    (Amer Dental Assoc, 2011-09-01) Oliveira, Marcio Augusto de; Gallottini, Marina Helena; Pallos, Debora; Maluf, Paulo Sérgio Zaidan [UNIFESP]; Jablonka, Fernando; Ortega, Karem Lopez; Universidade Federal de São Paulo (UNIFESP)
    Background. In a pilot study, the authors aimed to determine the success rate of dental implants placed in patients who were positive for human immunodeficiency virus (HIV) and were receiving different regimens of highly active anti-retroviral therapy (HAART). They considered patients' levels of cluster of differentiation (CD) 4(+) cells and viral load, and they attempted to verify whether patients with baseline biochemical signs of bone mineral density loss could experience osseointegration impairment.Materials and Methods. One of the authors, a dentist, placed dental implants in the posterior mandibles of 40 volunteers, divided into three groups: one composed of HIV-positive patients receiving protease inhibitor (PI)-based HAART; a second composed of HIV-positive patients receiving nonnucleoside reverse transcriptase inhibitor based HAART (without PI); and a control group composed of HIV-negative participants. The authors assessed pen-implant health six and 12 months after implant loading. They analyzed the success of the implants in relation to CD4(+) cell counts, viral load and baseline pyridinoline and deoxypyridinoline values.Results. The authors followed 59 implants for 12 months after loading. Higher baseline levels of pyridinoline and deoxypyridinoline found in HIV-positive participants did not interfere with osseointegration after 12 months of follow-up. Average pen-implant bone loss after 12 months was 0.49 millimeters in group 1, 0.47 mm in group 2, and 0.55 mm in the control group.Conclusions. The placement of dental implants in HIV-positive patients is a reasonable treatment option, regardless of CD4(+) cell count, viral load levels and type of antiretroviral therapy. Longer, follow-up periods are necessary to ascertain the predictability of the long-term success of dental implants in these patients.Clinical Implications. Limited published scientific evidence is available to guide clinicians in regard to possible increased risks associated with dental implant placement in HIV-positive patients.
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    Treatment for agenesis of maxillary lateral incisors: a systematic review
    (Wiley-Blackwell, 2013-08-01) Andrade, D. C. M.; Loureiro, C. A.; Araujo, V. E.; Riera, R. [UNIFESP]; Atallah, Alvaro N. [UNIFESP]; Clin Integrada Odontol Ciodonto; Pontificia Univ Catolica Minas Gerais PUC MG; Universidade Federal de São Paulo (UNIFESP)
    Objectives - To compare the efficacy and safety of three orthodontic treatment modalities for agenesis of maxillary lateral incisors: 1) closing the space with the reshaped canine substituting the lateral incisor, 2) opening the space with placement of a conventional fixed bridge, and 3) opening the space with placement of a single-unit implant and an implant-supported crown.Setting - Brazilian Cochrane Center and Universidade Federal de São Paulo, Brazil.Material and Methods - the following databases were investigated: Cochrane Register of Controlled Trials (Edition 12, 2011), EMBASE (from 1974 to December 2011), MEDLINE (from 1965 to December 2011), LILACS (from 1966 to November 2011), and Odontology Brazilian Bibliography Database (from 1966 to November 2011). Conference abstracts, main Brazilian dissertations and theses databases, and reference lists were handsearched. This systematic review included randomized or quasi-randomized controlled trials (RCTs) including women aged 15 years or over and men aged 21 years or over who received one of the interventions stated above. Two observers independently evaluated all the studies regarding eligibility criteria and assessed the risk of bias of included studies.Results - No studies were included in the review as no RCTs were found. Most of the evidence comes from case reports and narrative reviews on case reports and from three studies with a single post-intervention evaluation and non-comparable control groups with high risk of bias.Conclusions - There is no scientific evidence for any of the three most common types of treatment for agenesis of the maxillary lateral incisors. RCTs into this issue are still necessary.