Orientador: Frederico Andrade e Silva / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-13T01:24:11Z (GMT). No. of bitstreams: 1 Cvijic_Gojko_M.pdf: 808997 bytes, checksum: 9dea6418612a9a36ca0683f628728557 (MD5) Previous issue date: 2009 / Resumo: Varias pesquisas tem mostrado que aumento de energia na superfície e a fabricação do implante na ausência de ar, aumenta a hidrofilia da superfície reduzindo o tempo da osseointegração. O objetivo desse estudo foi a avaliar o tempo de vida útil e o Nível de Reabsorção Óssea (NRO) entre os implantes com superfícies química (SLActive) e fisicamente (SLA) tratadas, instalados em maxilas previamente enxertadas com osso autógeno em bloco, e carregados com coroas unitárias parafusadas. Foram utilizados 17 voluntários e 20 implantes (10 com superfície SLA e 10 com superfície SLActive). Dez semanas após a instalação dos implantes no grupo controle (SLA) e 4 semanas no grupo teste (SLActive), foram iniciados os procedimentos para a confecção das próteses parafusadas. Os pilares foram apertados com força de 35Ncm, 12 semanas após a colocação dos implantes com superfície SLA e após 6 semanas com a superfície SLActive. As radiografias periapicais foram tomadas e avaliadas no ato da colocação dos implantes, no dia de aperto do pilar, e, 1 e 3 meses com a coroa definitiva em função. Foi realizada a comparação do NRO entre dois tipos de superfícies. Dois implantes SLActive foram perdidos durante o aperto dos pilares. Os resultados mostraram que NRO ao redor dos implantes com 3 meses em função foi menor no grupo teste quando comparado com grupo controle. Os implantes com superfície SLActive instalados na maxila, na área tratada com enxerto ósseo em bloco, e carregados com coroas unitárias 6 semanas após a instalação, tiveram menor vida útil quando comparados com implantes com superfície SLA. / Abstract: Many researches have shown that higher energy of dental implants and production in chamber without air, enlarge surface hidrofilicity and reduce osseointegration time. The aim of this study was to evaluate the survival rate and the Level of Bone Resorption (LBR) between the implants with chemically and physically treated surfaces, placed in maxillae previously treated with bone block grafts, and loaded with single screwed crowns. Seventeen patients were treated with 20 implants (10 with SLA and 10 with SLActive surface). Ten weeks after implant placement in control group (SLA) and four weeks in test group (SLActive) we began with prosthodontical treatment. The abutments were tightened with 35Ncm, 12 weeks after placement of implants with SLA surface, and after 6 weeks with SLActive surface. Periapical radiographies were made and evaluated after implant placement, after abutment tightening, 1 and 3 months with crown in function. We have done a comparison of LBR between two surfaces. The results have shown that LBR around the implants in function was smaller in the test group comparing to the control group, while implants with SLActive surfaces placed in maxillae, previously treated with bone block graft, and loaded with single screwed crowns 6 weeks after, have smaller survival rate comparing to SLA implants. / Mestrado / Protese Dental / Mestre em Clínica Odontológica

A research report submitted to the Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Dentistry in the branch of Maxillofacial and Oral Surgery 31 May 2018. / Aim The aim of this retrospective study was to determine the outcomes of secondary alveolar bone grafts (SABG) in cleft patients treated at the Wits Dental Hospital at the Charlotte Maxeke Johannesburg Academic Hospital. Objectives To record the demographic data of patients who had secondary alveolar bone grafts, and to assess the outcomes of SABG by evaluating clinical variables and the quantity of bone post SABG. Methods Records of 19 patients with a total of 23 clefts were examined to evaluate the amount of bone at the cleft site following secondary alveolar bone graft. Socio-demographic information was collected as well as the clinical variables of the type of graft used, canine eruption, keratinised tissue around teeth close to the cleft, and closure or persistence of any oronasal fistula. The amount of bone at the graft site was measured on CBCT images using the Chelsea scale. Comparisons of Chelsea scale scores and CBCT findings were carried out. SPSS ® 24 was used to analyse the data. All statistical tests were conducted at 5% significance level. Results Most (52%) patients were male, with 57% having left unilateral cleft. The majority of them received autogenous bone grafts from the chin. Most (65.2%) of the patients showed good clinical outcomes, whilst showing evidence of bone resorption in and around the graft site on CBCT images. Fifteen of the patients were considered to have partial alveolar graft resorption. Conclusion In the majority of patients, 3D CBCT images revealed bone resorption in areas that 2D images gave an impression of presence of bone. However, the majority of patients indicated good clinical outcomes despite the poor radiological findings. / LG2018

No description available.

Cylindric (10 mm diameter X 15 mm deep) osteochondral defects were created in the medial femoral condyles of 5 horses to mimic clinical cases of subchondral bone cysts after debridement. The defects were created with either a standard square ended drill bit or a compaction drill bit. The compaction drill bit compresses bone laterally and distally creating a dense wall and floor. Twelve-mm sternal cancellous cylinders were compressed to 9.25 mm and inserted into the femoral defects where they were presumed to expand and tighten the fit. The end result was sternal cancellous bone that exactly fit the femoral defects. Fluorochrome bone labels were used to confirm the origin of bone present in the defects at necropsy, which was performed after 6 months. Successful graft incorporation occurred in 3 of the compacted and 2 of the noncompacted defects. The surfaces of the successful cancellous bone grafts contained predominately fibrocartilage. The unsuccessful noncompacted defects expanded laterally and deeply into the parent bone epiphysis while the unsuccessful compacted defects remained confined to the originally created size. / Master of Science

published_or_final_version / Dentistry / Master / Master of Dental Surgery

No description available.

Thesis (M.S. in mechanical engineering)--Washington State University, December 2009. / Title from PDF title page (viewed on Jan. 22, 2010). "School of Mechanical and Materials Engineering." Includes bibliographical references (p. 123-128).

published_or_final_version / abstract / toc / Dentistry / Doctoral / Doctor of Philosophy

No description available.

Call number: LD2668 .T4 1964 R82 / Master of Science