Background. The aim of this study was to assess the volumetric stability and bone formation in grafts with Bio-Oss and autogenous bone at different proportions in rabbit calvaria. Material and Methods. Ten rabbits received four titanium cylinders in their calvaria and randomly divided into the following groups: Group I: Bio-Oss (100%), Group II: Bio-Oss (75%) + autogenous bone (25%), Group III: Bio-Oss (50%) + autogenous bone (50%), and Group IV: autogenous bone (100%). After twelve weeks, the animals were euthanized, and samples were collected for clinical and histological analysis. Results. Clinical analysis showed that Groups I (90.43 ± 8.99) and II (90.87 ± 7.43) had greater dimensional stability compared to Group IV (P=0.0005). Histologically, Groups I, II, and III showed areas of bone formation with particles of biomaterial remaining in close contact with the newly formed bone. However, there were no significant differences between the groups regarding the newly formed bone area. Conclusion. It was concluded that the use of Bio-Oss either alone or associated with the autogenous bone at a proportion of 25% showed superior dimensional stability compared to the use of autogenous bone in the proposed experimental model.
Rehabilitation with osseointegrated implants is a therapeutic option consolidated in the literature and has a high rate of success and predictability. However, the loss of dental elements leads to tissue collapse that often make the installation of dental implants unfeasible, causing atrophic defects in the jaws of varying magnitudes. The objective of this case report was to demonstrate the association of a synthetic biomaterial with Fibrin Rich in Platelets (LPRF) with the purpose of gingival tissue augmentation in aesthetic area. The patient underwent preoperative, clinical and radiographic examinations (Cone Beam computed tomography) of the maxilla region with the making of a prototype and one year and four months of follow-up. A homogeneous onlay graft was performed with a cortico-medullary block in the region of the bone defect. After seven months of bone remodeling, the patient underwent a new computed tomography and dental implants were inserted, concomitant with grafting of particulate biomaterial of inorganic mineral hydroxyapatite, which received an association of L-PRF in liquid phase and was later covered with the L-PRF membrane. After six months, a new computed tomography scan was performed to evaluate the previous procedure and followed with the reopening and placement of provisionals with the conditioning of the gingival tissue. After 3 months, personalized molding was performed and the fixed metal-ceramic prosthesis was made in the region of elements 12 to 22. We can conclude with the clinical case that grafting synthetic biomaterial associated with L-PRF proved to be an effective technique in increasing tissue volume.
A hiperpneumatização do seio maxilar é um fator complicador para a instalação de implantes na região posterior de maxila. O levantamento do assoalho do seio maxilar é uma alternativa para possibilitar a instalação de implantes nestes casos. Entretanto, complicações transcirúrgicas podem ocorrer, sendo a perfuração da membrana de Schneider a mais comum. Diversas manobras são descritas na literatura no manejo das perfurações da membrana sinusal, possibilitando o reparo e a execução do procedimento de enxertia no mesmo momento cirúrgico. Dentre as formas de reparo, a utilização de membranas de Fibrina Rica em Plaquetas e Leucócitos (L-PRF) tem sido apresentada como uma opção de tratamento com resultados interessantes e promissores para se alcançar o reparo. Este trabalho descreve um caso clínico onde a perfuração da membrana de Schneider foi reparada com membranas de L-PRF e o procedimento realizado sem intercorrências pós-operatórias, possibilitando a posterior instalação de implantes e o sucesso da reabilitação.
A instalação de implantes para reabilitação oral é de fato comprovada cientificamente como uma técnica viável. As técnicas mais utilizadas atualmente são: a técnica tradicional e a técnica guiada. Com a chegada da odontologia digital houve uma modificação da técnica da cirurgia guiada. Com o escâner intra-orais e novos softwares se consegue unir as imagens do escaneamento com as da tomografia, realizando assim um planejamento virtual, onde é possível a impressão de guias cirúrgicos, possibilitando uma maior precisão da cirurgia. O objetivo do trabalho será de demonstrar e comparar a técnica tradicional e a guiada, através de um caso clínico. em que foram realizadas as duas técnicas no mesmo paciente. As duas técnicas serão realizadas em um paciente de 43 anos que perdeu há alguns anos os elementos 14, 16 e 26. Será utilizado o sistema de implante guiado da SIN na região do 14 e o sistema tradicional da neodent, na região do 16 e 26, seguindo as instruções dos fabricantes, relatando a técnica utilizada. Concluímos que a utilização da técnica de cirurgia guiada traz várias vantagens, porém devido as suas indicações, não pode ser utilizada em qualquer caso. Desta maneira devendo esta ser realizada quando possível.
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