Glenoid Bone Preparation Set with Inclined Drill Guide
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Solution Overview
Problem
Conventional glenoid base preparation for shoulder prostheses is complex, risky, and time-consuming, requiring intricate bone housing creation and precise manual drilling, which complicates the surgical procedure and may lead to instability.
Innovation Solution
A glenoid cavity bone preparation set comprising a drill guide with inclined orifices for precise drill bit placement and a compactor with a trapezoidal shape to facilitate bone housing formation, ensuring optimal positioning and stability of the glenoid base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional manual bone preparation methods are used, then the surgeon can perform the procedure with basic tools, but the procedure becomes complex, time-consuming, and risky
Solution Approach 1:
The drill guide is positioned and secured on the glenoid cavity before any bone removal or housing creation. The guide pin is inserted through the passage orifice to establish precise positioning, allowing all subsequent drilling and compaction operations to be performed accurately without repeated positioning adjustments
Solution Approach 2:
The drill guide acts as an intermediary device between the surgeon and the bone preparation process. It provides a standardized interface with pre-defined orifices that guide drill bits and compactors, translating the surgeon's positioning action into precise, repeatable bone preparation geometry without requiring manual measurement or calculation
2Manufacturing precision
If intricate bone housing creation is performed manually, then the anchoring element can be customized, but the procedure becomes lengthy and tedious
Solution Approach 1:
The compaction portion is designed with a predetermined trapezoidal geometry that matches the required bone housing shape. By pre-forming the compaction tool with the exact geometry needed, the device eliminates the need for multiple sequential drilling and shaping operations, achieving precise bone housing in a single compaction action
Solution Approach 2:
The compaction portion's geometry parameters (trapezoidal shape with specific angles and dimensions) are optimized to create the ideal bone housing configuration. The angled surfaces and overall shape are designed to compress and mold the bone material into the precise configuration needed for anchoring element stability, transforming unprepared bone into a precisely shaped housing through controlled mechanical compression
3Measurement precision
If precise manual drilling is required, then accurate bone bores can be created, but the procedure becomes risky and requires high surgeon dexterity
Solution Approach 1:
The guide orifices in the drill guide serve as intermediaries that physically constrain and guide the drill bit trajectory. The drill bit passes through pre-defined orifices with specific orientations, which automatically ensure accurate bone bore positioning and angles without requiring the surgeon to manually calculate or measure each drilling parameter
Solution Approach 2:
The drill guide is positioned and secured on the glenoid cavity before any drilling occurs. The guide pin inserted through the passage orifice establishes the precise positioning and orientation of the entire drill guide assembly, allowing all subsequent drilling operations to inherit this pre-established accuracy and eliminating the need for repeated positioning adjustments during drilling
4Strength
If the anchoring element has a trapezoidal shape for stable anchoring, then the glenoid base achieves robust fixation, but the bone preparation becomes more complex
Solution Approach 1:
The compaction portion is designed with a trapezoidal geometry that precisely matches the required bone housing shape for the trapezoidal anchoring element. By pre-forming the compaction tool with the exact geometry needed, the device creates the complementary trapezoidal bone housing in a single action, eliminating the need for complex sequential shaping operations to achieve the same result
Solution Approach 2:
The compactor acts as an intermediary that transfers the trapezoidal geometry from the tool to the bone material. The compaction portion's angled surfaces and overall shape guide the compression and molding of bone material into the precise trapezoidal configuration needed for the anchoring element, transforming unprepared bone into a precisely shaped housing through controlled mechanical compression
Data Source
AI summary
This preparation set comprises a drill guide (31) comprising a bearing surface (33) intended to bear against a glenoid cavity, a passage orifice (35) intended for the passage of a guide pin (36) implanted in the glenoid cavity, and first and second guide orifices (37, 38) each opening into the bearing surface (33) and each intended to guide a drill bit (38) capable of realizing a bone bore in the glenoid cavity, the first and second guide orifices (37, 38) being inclined with respect to the extension axis of the passage orifice (35) and converging in the direction of the bearing surface (33); and a compactor (42) comprising a compaction portion (45) having a generally trapezoidal shape and intended to be impacted against the glenoid cavity so as to form a bone housing in the glenoid cavity, the compactor (42) further including a passage hole (49) extending at least partially in the compaction portion (45) and intended for the passage of the guide pin (36) implanted in the glenoid cavity.