Coordinated Drill and Rasp Guide for Medullary Cavity Preparation
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Solution Overview
Problem
Current methods for preparing the medullary cavity of a bone for an implant are inefficient, as they require separate drills for bores and rasps for lateral openings, lacking a unified solution for both bore and opening preparation.
Innovation Solution
The apparatus comprises a drill for creating a bore and a fastening device for a rasp, both translationally movable relative to a housing with a guide that directs the drill and rasp in a translational direction, allowing for simultaneous preparation of bores and lateral openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate drills and rasps are used for preparing bores and lateral openings, then the functions are specialized, but the process efficiency and coordination are reduced
Solution Approach 1:
The patent combines separate drill and rasp operations into a single coordinated apparatus. The drill unit and rasp unit are integrated on one shaft, allowing both bore preparation and lateral opening preparation to be performed in a single surgical step, thereby improving process efficiency while maintaining functional specialization through dedicated units for each task.
Solution Approach 2:
The apparatus serves multiple functions through a single integrated device. The drill unit prepares the central bore while the rasp unit prepares lateral openings, and both can be actuated through the same handle and shaft system. This multi-functional design eliminates the need for separate instruments while maintaining specialized capabilities for each preparation task.
2Manufacturing precision
If separate instruments are used for bore and opening preparation, then each instrument can be optimized, but the number of surgical steps increases
Solution Approach 1:
The patent merges multiple surgical steps into one by integrating the drill and rasp units on a single shaft. Both units can be activated simultaneously or sequentially through the same handle, allowing bore and lateral opening preparation to be completed in a single surgical step rather than requiring separate instrument insertions and operations.
Solution Approach 2:
The drill and rasp units are pre-positioned and configured on the shaft before insertion into the bone. The guide structure and fastening devices are prepared in advance to ensure proper alignment and simultaneous or sequential operation, eliminating the need for multiple separate surgical steps and reducing overall procedure time.
3Measurement precision
If a unified apparatus is used for drill and rasp operations, then coordination and precision are improved, but the device complexity increases
Solution Approach 1:
The unified apparatus is divided into distinct functional segments: a drill unit with its own cutting element and actuation mechanism, a rasp unit with blades and fastening device, and a common shaft and handle. This segmentation allows each component to be optimized independently while maintaining overall coordination through the shared shaft alignment and simultaneous actuation capability.
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
This solution enables efficient preparation of both bores and lateral openings in the medullary cavity, improving the precision and speed of the implant preparation process by allowing the drill and rasp to move in a coordinated translational direction.
Implementation Method 1
The guide device is configured to absorb impact energy for moving the guide device in the translational direction of movement and to transmit it to the fastening device for moving the fastening device in the translational direction of movement
Data Source
AI summary
An instrument and apparatus for preparing a medullary cavity of a bone for an implant includes a drill for producing a bore in the medullary cavity, a fastening device for a rasp for producing an opening in the medullary cavity, and a housing. The drill and the fastening device are each translationally movable relative to the housing. The apparatus also includes a guide configured to guide the drill in a translational direction of movement of the drill for producing the bore and the rasp in the translational direction of movement or in substantially the translational direction of movement for producing the opening.