Navegando por Palavras-chave "Dental implants"

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    Piezoelectric osteotomy for the placement of titanium implants in rabbits: histomorphometry study
    (Wiley-Blackwell, 2014-10-01) Kfouri, Flavio de Avila [UNIFESP]; Duailibi, Monica Talarico [UNIFESP]; Bretos, José Luis Gonçalves [UNIFESP]; Carvalho, Aluizio Barbosa [UNIFESP]; Pallos, Debora; Duailibi, Silvio Eduardo [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Univ Santo Amaro
    Objective: To evaluate bone remodeling around dental implants inserted into recipient sites prepared using either the piezoelectric or the conventional drilling technique.Material and Methods: Twenty-four male New Zealand white rabbits (4 months, 2.70 kg) received dental implants (3.3 mm diameter and 6 mm length) on the medial surface of the tibia and were divided into 3 groups (n = 8). Group I was euthanized at 7 days; group II, at 14; and group III, at 28 days. Each animal received four implants, two in the right and two in the left tibia (96 implants were installed). Each tibia was operated by the same technique, and there are therefore neighbor's implants installed by different techniques. Histomorphometric parameters were used: the volume occupied by trabecular bone around the implants (BV/TV), media thickness, separation and number of trabeculae around the loops, and the contact area (interface) directly between the bone and implant (BIC).Results: BV/TV was similar for both techniques (P = 0.291). Reduction in trabecular thickness was observed for both techniques (P < 0.05), but then returned to prior levels, with no significant difference between techniques (P = 0.217). Trabecular number increased from day 7 to day 14 (P < 0.001) and remained constant afterward for both techniques. No difference in BIC was observed between techniques on day 28 (P = 0.961).Conclusions: Piezoelectric osteotomy allowed bone formation for osseointegration of titanium implants, was not associated with bone necrosis, and provided results similar to those of the conventional technique. the piezoelectric technique can be considered a viable alternative in dental implantology.
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    Torque na instalação de implantes dentais pós-transplante de fíbula microvascularizado
    (Universidade Federal de São Paulo (UNIFESP), 2011-04-27) Maluf, Paulo Sérgio Zaidan [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    INTRODUCTION: The masticatory rehabilitation with dental implants has become, a therapeutic technique for edentulous patients. Techniques in dental implant are constantly perfected, as the torque to fix the cylinders in a bone, considered fundamental in the prognosis of success in bone integration. The reconstruction with microsurgical flaps, in facial bones, has been increasingly performed in patients to repair the post-surgical sequelae. For the complete functional rehabilitation of these patients, the installation of bone integrable implants is necessary. With the objective of supporting the dental prosthesis, but there are no studies that determine the necessary torque to the initial stabilization of these dental implants in bone revascularized transplants. OBJECTIVE: To measure torque in installation of titanium implants, fibula microrevascularized and consolidated, in reconstruction of maxilla and mandibula. METHODS: Twenty eight dental implants were installed in seven patients with surgical reconstructions in the maxila and mandibular by microsurgical flaps. At the time of the installation of the implants, torque for final stabilization was measured, whose data were tabulated and analyzed. RESULTS: The minimum torque for installation of the implants was of 20Ncm in 39,3% of the implants, and the maximum, of 45Ncm in 28,5%. CONCLUSION: The measure of torque in implants of titanium of fibula microrevascularized transplants, for maxilomandibular reconstruction, varied from 20 to 45Ncm, and no influence related to gender, to age group or to time of transplant has been observed.