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Автор: Eshet Yael, Mann Ronit, Anaton Abby, Yacoby Tomer, Gefen Amit, Jerby Eli
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Ключові слова:
хірургія, хирургия, surgery ; ортопедія, ортопедия ; міцність, прочность
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Анотація:
This paper presents a feasibility study of drilling in fresh wet bone tissue in vitro using the microwave drill method [Jerby et al., 2002], toward testing its applicability in orthopaedic surgery. The microwave drill uses a near-field focused energy (typically, power under 200Wat 2.45-GHz frequency) in order to penetrate bone in a drilling speed of 1 mm/s. The effect of microwave drilling on mechanical properties of whole ovine tibial and chicken femoral bones drilled in vitro was studied using three-point-bending strength and fatigue tests. Properties were compared to those of geometrically similar bones that were equivalently drilled using the currently accepted mechanical rotary drilling method. Strength of mid-shaft, elastic moduli, and cycles to failure in fatigue were statistically indistinguishable between specimen groups assigned for microwave and mechanical drilling. Carbonized margins around the microwave-drilled hole were 15% the hole diameter. Optical and scanning electron microscopy st
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