Bone drilling depth judging method and system

Abstract

The invention discloses a bone drilling depth judging method and system. The method comprises the following steps of: S1, obtaining force characteristic data under different bone drilling depths in a bone drilling process; S2, when the force characteristic data tends to be stable in a certain stage, determining a basic value of the force characteristic data in a cancellous bone drilling stage according to the stable force characteristic data; S3, determining a preliminary cortical bone drilling stage by taking a data point with a force characteristic data initial maximum value as a first critical point and taking a data point of the basic value or a product value having a certain proportion with the basic value as a second critical point; and S4, selecting a target matching value or a target matching interval in the preliminary cortical bone drilling stage, carrying out value matching or interval matching on the target matching value or the target matching interval and the force characteristic data after the critical point, and if the matching succeeds, considering that the bone drilling depth achieves a target value. According to the method and system disclosed by the invention, the fact whether the target depth is achieved can be judged according to stress condition, and the result is more objective and correct.

Description

technical field [0001] The invention relates to a bone drilling depth judging technology, in particular to a bone drilling depth judging method and system. Background technique [0002] Before orthopedic puncture or implant surgery, it is usually necessary to position the electric drill tool to the corresponding position of the bone, and then drill a hole to a certain depth on the bone to form a perforation channel for the next operation. In the current bone drilling process, the manual operation is basically performed by doctors, and the operation process is entirely based on subjective judgment. During the drilling process, the electric drill tool will pass through the cortical bone (hard bone) of the bone, the cancellous bone and then to the cortical bone in turn, from hard to soft and then to hard. In the subjective judgment, there will be a process of strength changing from large to small and then to large. The doctor judges the depth reached by the electric drill thro...

AI Technical Summary

Problems solved by technology

However, the manual drilling process is too subjective, and the size of the bones of different people will be different. The controllability of the drilling depth is low, and it is easy to drill too deep, and the cortical bone on the other side is drilled, resulting in penetration on both sides of the bone. , Injury to blood vessels, nerves, muscles, etc., or affect subsequent operations

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