Internal-hole-expanding bone driller

Abstract

The invention discloses an internal-hole-expanding bone driller, relating to the field of medical apparatus and instruments for the department of orthopaedics. The internal-hole-expanding bone driller comprises a hole-expanding turntable, wherein the axis of the upper surface of the hole-expanding turntable is connected with the output end of a hole-expanding motor; a sliding chute is arranged in the radial direction on the lower surface of the hole-expanding turntable; the lower surface of the hole-expanding turntable is provided with a bone-drilling motor; a sliding block is arranged at the axis position at the upper end of the bone-drilling motor, is positioned in the sliding chute, and is in sliding connection with the sliding chute; an electric push rod is arranged at one end inside the sliding chute; the output end of the electric push rod is connected with the sliding block; the tail end of the sliding chute is provided with a change-over switch of the electric push rod and the bone-drilling motor; the output end of the bone-drilling motor is connected with a drilling rod; and the other end of the drilling rod is provided with a tapered drill bit with the diameter being greater than that of the drilling rod. The internal-hole-expanding bone driller has the beneficial effects that during use, the internal-hole-expanding bone driller can carry out the hole expanding operation inside the bone, so that the inside hole is larger than a hole penetrating from the upper side.

Description

technical field [0001] The invention relates to the field of orthopedic medical instruments. Background technique [0002] When performing orthopedic treatment, sometimes it is necessary to drill holes in the patient's bone to embed bone nails and other treatments for fixation. The traditional bone drill is a tapered drill hole, which can only drill holes that are thicker at the top and thinner at the bottom. When using bone nails for fixation, it needs to rely on the screw method of the bone nails, which is unstable and easy to cause secondary injuries. If the drilled hole is internally enlarged, fix the bone nails at the bottom of the holes to prevent loosening of the bone screws. Such a fixation method is more stable and firm, so it is necessary to improve the bone drill, which can drill a hole larger than the upper hole in the inside of the bone to match the internal fixation method. Contents of the invention [0003] The technical problem to be solved by the present ...

AI Technical Summary

Problems solved by technology

[0002] When performing orthopedic treatment, sometimes it is necessary to drill holes in the patient's bone to embed bone nails and other treatments for fixation. Traditional bone drills are conical drill holes, which can only drill holes that are thicker at the top and thinner at the bottom. When using bone nails for fixation, it needs to rely on the helical method of the bone nails, which is unstable and easy to cause secondary injuries. If the drilled hole is internally enlarged, fix the bone nails at the bottom of the holes to prevent the bone screws from loosening. This fixation method is more stable and firm, so an improvement of the bone drill is needed, and a hole larger than the upper hole can be drilled inside the bone to match the internal fixation method

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