Powered Acetabular Cup Detaching Apparatus for Hip Joint Surgery
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Solution Overview
Problem
Conventional methods for detaching the acetabular cup from the acetabular bone in artificial hip joints are inefficient, causing excessive bone loss and damage due to manual operation, which lacks precision and uniformity, especially for inexperienced operators.
Innovation Solution
An acetabular cup detaching apparatus with a powered rotary shaft and pivoting cutter that rotates along the acetabular cup's inner surface, allowing for precise detachment with electric control, minimizing bone damage and requiring less operator skill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual cutting tool is used to detach the acetabular cup from the acetabular bone, then the operator can perform the detachment operation, but the acetabular bone is excessively cut and lost more than necessary, causing secondary damages
Solution Approach 1:
The patent replaces the manual mechanical cutting operation with a power-driven cutting mechanism. The power drive unit provides rotational power to the cutting part, eliminating the need for manual rotation and enabling more precise control over the cutting process, thereby reducing excessive bone loss.
Solution Approach 2:
The patent introduces an angle adjustment mechanism that allows the cutting part to be adjusted to different angles relative to the acetabular cup. This parameter adjustment enables the cutting part to engage the bone at optimal angles, ensuring precise detachment while minimizing unnecessary bone removal.
2Ease of operation
If a manual cutting tool is used to detach the acetabular cup, then the operation can be performed, but cutting is not uniform and it is difficult to perform the operation with uniform force or range particularly when an inexperienced operator is performing the operation
Solution Approach 1:
The patent replaces manual manipulation with a power-driven system that provides consistent rotational force. The power drive unit ensures uniform rotation of the cutting part, eliminating the variability introduced by manual operation and ensuring consistent cutting performance regardless of operator skill level.
Solution Approach 2:
The patent incorporates an angle adjustment mechanism that allows dynamic adjustment of the cutting part's orientation. This enables the cutting part to maintain optimal engagement with the acetabular bone throughout the detachment process, ensuring uniform cutting even as the cup is gradually removed.
3Productivity
If a conventional manual tool is used for acetabular cup detachment, then the operation can be completed, but the acetabular bone is directly exposed to impact, thus having secondary damages
Solution Approach 1:
The patent uses a power-driven cutting part that rotates at controlled speeds to gradually cut and separate the acetabular cup from the bone. This controlled rotational cutting replaces impact-based manual techniques, reducing sudden forces and direct impact on the bone while maintaining efficient detachment speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and accurate detachment of the acetabular cup from the acetabular bone with reduced risk of bone damage and improved precision, regardless of operator skill level, by using a powered mechanism and adjustable blade angle.
Implementation Method 1
a cutting part brought into close contact with an inner circumferential surface of the acetabular cup and rotating together with the body part to cut a surface of acetabular bone
Data Source
AI summary
An acetabular cup detaching apparatus for an artificial hip joint, according to an embodiment of the present invention, comprises: a body part that rotates with power transmitted thereto; and a cutting part brought in close contact with the inner circumferential surface of the acetabular cup and rotating together with the body part to cut the surface of the acetabular cup. According to the present invention, an operation can be easily performed by rotating a blade, together with a rotary shaft part, along the outer circumferential surface of the acetabular cup in the radial direction of the acetabular cup through electric control, which makes it possible to rapidly and accurately detach the acetabular cup from an acetabular bone irrespective of an operator's skill. In addition, it is possible to prevent damage to the blade in advance, minimize damage to an acetabular bone, and accurately detach only the acetabular cup from the acetabular bone by forming a supporting cup and the blade in sizes corresponding to the outer circumferential surface and inner circumferential surface of the acetabular cup and gradually cutting the acetabular bone part, to which the acetabular cup is attached, by rotating the blade at a predetermined angle according to predetermined steps.