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Spatula needles
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Needles with side cutting edge are called spatula-type needles. The original form of such needles, flat all along, eliminates tissue cutting, which is characteristic for many types of cutting needles. Spatula needles have been developed especially for eye surgery. Such needle penetrates between thin layers of tissue, for example, sclera or cornea, and passes through some cavity, stratifying tissue fibers without damaging them. The optimal width, form, and sharp edges of such needles provide the maximal lightness of passage through tissue and excellent control.
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Cutting needles
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Cutting needles have three cutting edges. The edges are sharpened specially for cutting through hard, difficult-to-cut-through tissues. This type of needles is optimal for skin-suturing, where the filament is to pass through dense, heterogeneous, comparatively thick connective tissue.
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Pricking needles 
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Pricking needles have no cutting edges. They are round, with conic point. Such needles are used in suturing vessels, skin, and muscles. Their characteristic property is minimum trauma to tissues.
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Pricking needles with cutting poin
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These needles are with round conical point and three-edged sharpening of the top. The cutting edges of the top provide easy puncture of hard tissues during vessels and skin suturing.
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