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Osseous tissue engineering in oncologic surgery.

M J Miller
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Abstract

Tissue engineering is an interdisciplinary field that will yield new sources of tissue for clinical and research purposes in oncology. Bone is under intense investigation by this field. Relevant areas of progress are in advanced computing, biomaterials, cell technology, growth factor fabrication and delivery, and gene manipulation. Clinical techniques will emerge from continued investigation in each of these areas. Techniques that are developed must be scaled up to industry with products cleared by regulatory agencies and acceptable to clinicians and patients. The goals of tissue engineering in oncology are improved tissue models for basic cancer research and a change in clinical practice. Semin. Surg. Oncol. 19:294-301, 2000.

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Biomedical EngineeringBiopolymersBioprosthesisBone DevelopmentBone NeoplasmsBone TransplantationBone and BonesCell TransplantationDental ProsthesisGenetic TherapyHumansMandiblePolymersProsthesis ImplantationTissue TransplantationJournal ArticleReview

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M J Miller. Osseous tissue engineering in oncologic surgery.. https://doi.org/10.1002/1098-2388(200010%2F11)19%3A3%3C294%3A%3Aaid-ssu11%3E3.0.co%3B2-3

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PubMed2007

Optimal design of non-Newtonian, micro-scale viscous pumps for biomedical devices.

The present paper addresses the numerical optimization of geometrical parameters of non-Newtonian micro-scale viscous pumps for biomedical devices. The objective is to maximize the mass flow rate per unit of shaft power consumed by the rotor when an external pressure load is applied along the channel that houses the rotor. Two geometric parameters are considered in the optimization process: (i) the height of the channel that houses the rotor (H) and (ii), the eccentricity (epsilon) of the rotor. Three different micro-scale viscous pump configurations were tested: a straight-housed pump (I-shaped housing) and two curved housed pumps (L- and U-shaped housings). The stress-strain constitutive law is modeled by a power-law relation. The results show that the geometric optimization of micro-scale viscous pumps is critical since the mass flow rate propelled by the rotor is highly dependent on epsilon and H. Numerical simulations indicate that mass flow rate is maximized when epsilon approximately 0, namely when the rotor is placed at a distance of 0.05 radii from the lower wall. The results also show that micro-scale viscous pumps with curved housing provide higher mass flow rate per unit of shaft power consumed when compared with straight-housed pumps. The results are presented in terms optimized dimensions of all three configurations (i.e., H(opt) and epsilon(opt)) and for values of the power-law index varying between 0.5 (shear thinning fluids) and 1.5 (shear-thickening fluids).

Biomedical Engineering↗