Integrated Mandibular Fixation Device with Opposite Screw Threads
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Solution Overview
Problem
Current mandibular fixation devices are complex and time-consuming, especially for patients with larger teeth gaps or missing teeth, and often result in increased surgical complexity, risk of infection, and potential harm to patients and surgeons due to the use of multiple bone nails and steel wires.
Innovation Solution
A mandibular fixation device comprising a sleeve with screw rods and positioning members, including dental rings or bone plates, that allows for precise and efficient positioning of the mandible based on the patient's condition, reducing the need for extensive surgical effort and minimizing the use of steel wires and bone nails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional intermaxillary fixation devices use multiple bone nails and steel wires, then the fixation can be achieved, but the operation becomes complex and time-consuming
Solution Approach 1:
The patent combines multiple bone nails and steel wires into a single integrated fixation device. The device includes a body portion with multiple bone nail receiving holes and steel wire receiving holes, allowing all fixation elements to be installed through one unified structure rather than separately, thereby simplifying the surgical procedure while maintaining reliable fixation.
Solution Approach 2:
The fixation device serves multiple functions within a single structure: it provides bone nail fixation through receiving holes, steel wire fixation through additional receiving holes, and positioning functionality. This multi-functional design eliminates the need for separate fixation devices and reduces the number of surgical steps required.
2Strength
If multiple bone nails are used for fixation, then the fixation strength is improved, but the risk of infection increases and surgical time is extended
Solution Approach 1:
The bone nails and steel wires are pre-positioned within the integrated fixation device body before implantation. The surgeon does not need to individually insert and position multiple separate fixation elements during surgery; instead, the pre-assembled device is implanted as a unit, significantly reducing surgical time while maintaining the required fixation strength through the pre-configured multiple anchoring points.
3Manufacturing precision
If steel wires are used for intermaxillary fixation, then the positioning effect is achieved, but harm to patient and surgeon may occur
Solution Approach 1:
The patent replaces reusable steel wires with a disposable integrated fixation device that incorporates all necessary fixation elements. The device is designed for single-use implantation, eliminating the need for steel wires that require manual manipulation and potential cutting during surgery, thereby reducing the risk of injury to both patient and surgeon while maintaining precise positioning capability.
4Ease of operation
If manual fixation is used relying on surgeon skill, then the procedure is simple, but precise positioning of mandible cannot be ensured
Solution Approach 1:
The integrated fixation device acts as an intermediary tool that bridges manual surgical technique and precise positioning requirements. The device includes built-in positioning structures such as guide holes and alignment features that objectively ensure accurate mandible positioning, eliminating reliance on the surgeon's subjective skill while keeping the surgical procedure straightforward through the unified device design.
Data Source
AI summary
A mandibular fixation device overcomes the low operability of the conventional mandibular fixation device. The mandibular fixation device includes a sleeve, a first screw rod, a second screw rod and two positioning members. The sleeve includes two ends respectively provided with first and second screw holes. The first and second screw holes have opposite spiral directions. The first screw rod has a first threaded portion and a first assembly portion. The first threaded portion is threadedly engaged with the first screw hole, and the first assembly portion is located outside of the sleeve. The second screw rod has a second threaded portion and a second assembly portion. The second threaded portion is threadedly engaged with the second screw hole, and the second assembly portion is located outside of the sleeve. The two positioning members are coupled with the first and second assembly portions, respectively.