Polyaxial Pubic Symphysis Bone Plate for Pelvic Fracture Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for stabilizing pelvic fractures, particularly in the pubic symphysis region, often require invasive procedures and lack sufficient stability, which can hinder healing and patient mobilization.
Innovation Solution
A pubic symphysis bone plate with polyaxial through-openings and screws that allow for angular stability and minimally invasive fixation, using a combination of cannulated screws, interlocking screws, and a compression plate system for secure bone fragment alignment and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bone plates and screws are used for pelvic fracture stabilization, then the procedure can be performed with standard instrumentation, but the fixation stability is insufficient and invasive procedures are required
Solution Approach 1:
The bone plate incorporates polyaxial through-openings that allow dynamic adjustment of screw insertion angles during surgery. The polyaxial mechanism enables the screw to be inserted at various angles (up to 20° deviation from the through-opening axis) and then locked into a stable position, providing both adaptability to anatomical variations and reliable fixation without requiring overly invasive procedures
Solution Approach 2:
The bone plate is designed with multiple through-openings distributed across its structure, allowing separate insertion and fixation of multiple screws at different locations. This segmentation enables staged fixation of different bone fragments while maintaining overall stability, reducing the need for single large invasive incisions
2Reliability
If standard screw insertion methods are used, then the procedure is straightforward, but screw backing-out occurs and angular stability is insufficient
Solution Approach 1:
The polyaxial screw mechanism allows the screw to be inserted at variable angles relative to the bone plate and then locked into a predetermined angular position. This dynamic insertion followed by fixed positioning prevents screw backing-out while maintaining angular stability, with the locking mechanism preventing retrograde movement without requiring complex multi-component systems
Solution Approach 2:
The screw design incorporates self-locking features that automatically prevent backing-out once inserted at the correct angle. The polyaxial mechanism with its locking component provides self-service angular stabilization, eliminating the need for additional external fixation devices or complex adjustment mechanisms
3Productivity
If minimally invasive fixation is implemented, then patient mobilization is accelerated, but achieving sufficient stability becomes more difficult
Solution Approach 1:
The polyaxial through-openings enable minimally invasive access while maintaining fixation stability through angular adjustment capability. The surgeon can insert screws at optimized angles that maximize bone purchase and fixation strength without requiring large incisions or extensive soft tissue dissection, thereby accelerating patient mobilization without compromising reliability
Solution Approach 2:
The bone plate design allows change in the angular parameters of screw insertion through the polyaxial mechanism. By adjusting the insertion angle within a range of up to 20° from the through-opening axis and then locking at a stable position, the system optimizes fixation parameters to achieve maximum stability through minimal invasive access points
Data Source
AI summary
The present invention relates to a pubic symphysis bone plate (100) for the surgical treatment of damages, in particular fractures or breaks, of the pelvis in the region of the symphysis, anterior pelvic ring up to and including the acetabulum in the case of suitable fractures. The present invention further relates to a set comprising a pubic symphysis bone plate (100) according to the present invention and further comprising at least one cannulated screw or creeping screw (120), preferably made of titanium alloy, preferably anodized, at least one interlocking screw (130) and/or a target instrument.