| 摘要 |
FIELD: medical engineering. SUBSTANCE: device has threading cone having sharp cone of angle equal to 40-45 deg having two flat faces each having sharpened cutting edge connected with cross-piece on the tip and cone having teeth for tapping buttress thread profile, an area with buttress thread and stem. Rod segment having buttress thread has thread which frontal wall has parabolic cross- section. EFFECT: high fixation rigidity and connection stability. 2 dwg |
