Method and system for judging bone drilling depth

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 drill bone depth judgment technology, in particular to a drill bone depth judgment method and system. Background technique [0002] Before orthopedic puncture or implantation, it is usually necessary to locate the electric drill tool to the corresponding position of the bone, and drill a hole on the bone to a certain depth to form a perforation channel for the next operation. The current bone drilling process is basically performed manually by a doctor, and the operation process is entirely subjective judgment. During the drilling process, the electric drill tool will pass through the cortical bone (hard bone) and the cancellous bone of the bone in turn, and then penetrate to the cortical bone, from hard to soft to hard. In subjective judgment, there will be a process of strength from large to small and then to large. The doctor judges the depth of the electric drill through the change in the strength of the hand, and stops drill...

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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