JP2003126100A - Osteotomic equipment whose cutting blade moves back and forth by partial rotation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for finishing osteotomy such as cutting, scrapping, etc., by allowing a cutting blade to partially rotate at a high speed not involving peripheral cartilaginous tissues, since the conventional osteotomic equipment which had precisely done finishing works of bone or cartilage by rotating a cutting blade at a high speed, but was highly possible to damage the peripheral cartilaginous tissues. SOLUTION: This equipment is characterized in that it adopts a power transmission mechanism (4) to convert a rotational motion from a motor (3) thereby allowing the cutting blade (2) to partially rotate back and forth.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic or electric medical bone surgical instrument in which a cutting blade part reciprocates partially at a high speed. 2. Description of the Related Art Conventionally, there has been a pneumatic or electric bone surgery instrument which performs precise processing such as cutting or curettage of bone or cartilage by rotating a cutting blade at a high speed. [0003] However, during the high-speed rotation, these are soft tissues (nerve tissue, vascular tissue, tendon tissue, muscle tissue, etc.) existing around the bone (or cartilage) to be processed. ) Was likely to be involved and damaged. Although there was a bone surgical instrument with a saw blade that reciprocated partly, it was not suitable for precision machining such as cutting and curettage, and was used exclusively for cutting. SUMMARY OF THE INVENTION The present invention has been made to eliminate the drawbacks of the present invention. Referring to the drawings, a pneumatic or electric motor is provided in a main body (1). A power transmission mechanism (4) for converting the rotary motion from (3) into a partial rotary reciprocating motion is incorporated, and the cutting blade (2) attached to the front end of the main body is caused to perform a partial rotary reciprocating motion. [0005] Now, when the bone surgical instrument is activated and the cutting blade part which is partially reciprocatingly reciprocating is brought into contact with bone (or cartilage), the contacted part is cut and scraped. Processing can be performed as desired. According to the present invention, since the cutting blade portion is partially reciprocating, the cutting blade portion is instantaneously inverted even if the soft tissue existing around the cutting blade portion is wound around the outward path. do it,
It repeats that the return trip and the winding loosen. result,
The surrounding soft tissue in contact with the cutting blade performs only the vibration motion following the cutting blade, and there is little risk of being caught and damaged. ADVANTAGE OF THE INVENTION According to this invention, the safety | security of surgical operation, such as a cutting process using a bone surgical instrument, improves. In particular, it is effective in protecting soft tissue (such as nerve tissue) behind bones to be processed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bone surgical instrument of the present invention. FIG. 2 is a partially cutaway side view of the present invention. FIG. 3 is a sectional view taken along line a of FIG. 2; [Description of Signs] 1 is a main body, 2 is a cutting blade, 3 is a motor, and 4 is a power transmission mechanism.

Claims (1)

Claims: 1. A bone surgical instrument in which a cutting blade (2) attached to the tip of a main body (1) reciprocates partly at high speed.