osteosarcoma (os) is a malignant mesenchymal tumor, which rarely occurs in the maxilla. although variable histologic and radiographic features of os have been reported previously, in the majority of the cases painful swelling of the jaw is mentioned as the first clinical presentation. furthermore, early diagnosis and wide surgical resection of the tumor are the most important determinant factor...

abstract patella is a relative uncommon site for chondroblastoma. most of cases of chondroblastoma in patella reported in literature are treated with patellectomy. we treated a large chondroblastic lesion in patella of an 18- year-old male with curettage, burring & bone graft and the result was satisfactory after 3 years post operation.

BACKGROUND: Dental disease, trauma and maxillofacial surgeries can cause alveolar bone defects. Among different kinds of treatment, autogenous bone grafts is accepted as a golden standard. On the other hand, because of limitation of treatment with autogenous bone grafts, osteogenic cells derived from stem cells are suggested. OBJECTIVES: The aim of this study was to compare the mean density of ...

Abstract Effective removal of heavy metals from wastewaters can enable increased reuse treated wastewater and reduce water scarcity worldwide. This paper describes the results an initial study on zinc using waste-derived aluminosilicate-based material by binary ion exchange with calcium potassium. About 2 mmol/g adsorption capacity was demonstrated aluminosilicate resin. Seven equilibrium isoth...

This work addresses the rehabilitation of water contaminated with atrazine, entrapping it in a permeable and sustainable barrier designed waste materials (sepiolite) biomaterials (cork pine bark). Atrazine adsorption was assessed by kinetics equilibrium assays desorption tested different extraction solvents. Adsorbed atrazine 100% recovered from sepiolite using 20% acetonitrile solution, while ...

As a typical pollutant, methylene blue poses serious threat to the environment and human health. Oily sludge pyrolysis residue loaded with metal oxides could be used prepare composite materials, which is not only an effective way treat oily sludge, but also possible method pollutants. In this paper, materials (AC-CuO, AC-ZnO, AC-TiO2) were prepared by residue-loaded CuO, ZnO, TiO2 directly, cha...

statement of problem: placement of mini-dental implants when single-tooth restorations are needed and the space is not sufficient to insert a standard diameter implant is indicated. there are many different mini-implant brands with various materials and surface characteristics; however, there are just few studies comparing them with each other. objectives: in this study, finite element analysis...