Patella Drill Guide and Compression Socket for Secure Fixation
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Solution Overview
Problem
Current orthopaedic surgical instruments lack an efficient system for accurately implanting prosthetic patella components, as they do not provide adequate means for precise sizing, alignment, and secure fixation during the surgical preparation of the patella for prosthetic implantation.
Innovation Solution
An orthopaedic surgical instrument system comprising a clamp with a pivotally coupled lever mechanism, a patella drill guide and trial instrument with a posterior trial bearing surface and drill guide holes, and a compression socket with deformable compressible bases, which allows for precise sizing, alignment, and secure fixation of prosthetic patella components by drilling anchor holes and using compressible bases to clamp the component in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional orthopaedic surgical instruments are used for patella component implantation, then the surgical procedure can be performed, but precise sizing, alignment, and secure fixation cannot be achieved
Solution Approach 1:
The instrument system is divided into distinct functional modules: a clamp for securing the patella, a drill guide for precise anchor hole drilling, and a compression socket with deformable bases for component fixation. Each module performs a specific function, allowing precise measurement and fixation while maintaining manageable system complexity through modular design.
Solution Approach 2:
The drill guide acts as an intermediary tool that bridges the clamp and the drilling operation. It provides precise alignment for anchor hole drilling while being securely attached to the clamp, enabling accurate positioning without requiring the surgeon to directly manipulate multiple separate instruments simultaneously.
2Measurement precision
If traditional orthopaedic surgical instruments are used for patella component implantation, then the surgical procedure can be performed, but accurate alignment cannot be achieved
Solution Approach 1:
The drill guide is merged with the clamp through a secure attachment mechanism, combining the positioning function of the clamp with the alignment function of the drill guide. This integrated design ensures that alignment accuracy is maintained while simplifying operation, as the surgeon manipulates a single unified instrument rather than coordinating multiple separate tools.
Solution Approach 2:
The clamp serves multiple functions: it secures the patella bone, provides a mounting platform for the drill guide, and maintains positioning throughout the surgical procedure. This multi-functionality reduces the number of separate instruments needed while maintaining alignment accuracy, thereby improving ease of operation.
3Reliability
If traditional orthopaedic surgical instruments are used for patella component implantation, then the surgical procedure can be performed, but secure fixation cannot be achieved
Solution Approach 1:
The compression socket employs deformable bases that change their physical state from uncompressed to compressed as the patella component is inserted. This parameter change allows the bases to conform to the component and provide secure fixation. The lever mechanism amplifies the compression force, achieving reliable fixation without requiring excessively complex instrumentation.
Solution Approach 2:
The compression socket transitions from an open, accommodating state to a compressed, securing state through the lever mechanism. This dynamic transformation allows the instrument to adapt to the patella component during insertion and then provide firm fixation, achieving high reliability while maintaining relatively simple device architecture through mechanical advantage.
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
The system enables precise alignment and secure fixation of prosthetic patella components, ensuring proper fit and stability during implantation, thereby improving the accuracy and reliability of patella replacement surgeries.
Implementation Method 1
Each compressible base is formed from a deformable material such as, for example, a compression material
Implementation Method 2
a clamp having a first lever pivotally coupled to a second lever
Data Source
AI summary
An orthopaedic surgical instrument system includes a compression socket configured for coupling with a selected one of a number of compressible bases. Each compressible base is shaped to conform with a posterior surface of either a dome patella implant component or an anatomical patella implant component.