A rotary osteotome for deep reach applications. The body of the osteotome has a tapered end that supports helically spiraling flutes. Substantially margin-less (without margin) working edges are interleaved between the flutes to provide compaction action when rotated in a non-cutting direction. The body also has an elongated cylindrical stopper section. An irrigation conduit passes through the center of the stopper section and emerges at a plurality of outlet orifices that function as independent nozzles for irrigating fluid. The outlet orifices are generally elliptical in shape and spaced around the body to maintain balance. The irrigation conduit has a main trunk that opens to a flow splitter, which in turn divides the flow of irrigating fluid into substantially equal branches. Each branch is angled at an acute trajectory relative to the longitudinal axis, in the direction of said apical end, between about 10° and 45°.本發明揭示一種用於深入應用之旋轉骨鑿。該骨鑿之該本體具有支撐螺旋盤旋流槽之一錐端。實質上無邊限(不具有邊限)工作邊緣在該等流槽之間交錯以當在一非切割方向上旋轉時提供壓緊動作。該本體亦具有一細長圓柱形停止器區段。一灌洗導管通過該停止器區段之中心且出現在充當用於灌洗流體之獨立噴嘴之複數個出口孔口處。該等出口孔口之形狀大體上係橢圓形且圍繞該本體間隔以位置平衡。該灌洗導管具有敞開至一分流器(其繼而將該灌洗流體之流量分為實質上相等分支)之一主軀幹。各分支在該頂端之方向上依介於約10°與約45°之間的相對於該縱軸之一銳角軌跡成角度。
