Contourable Arch Bar Apertures for Faster Maxillomandibular Fixation

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Solution Overview

Problem

Conventional maxillomandibular fixation (MMF) systems require significant chair time, expose personnel to sharps, compromise oral hygiene, and are difficult to apply in varied dentitions, while integrating inconsistently with modern surgical protocols.

Innovation Solution

An arch bar with elongate oval apertures and depending hooks for secure tooth attachment, allowing multi-material fixation, minimizing tissue trauma, and facilitating efficient, hygienic application and removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional tooth-borne wiring systems (Erich arch bars) are used for maxillomandibular fixation, then reliable occlusal control is achieved, but application and removal time is lengthy and staff are exposed to sharp wire ends

Engineering Contradiction:

Improveocclusal controlVSAvoidapplication and removal time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The device separates the fixation function into two independent components: the arch bar segment (attached to teeth) and the IMF screw segment (attached to bone). This segmentation allows each component to be optimized independently - the arch bar provides reliable occlusal control while the pre-installed IMF screw eliminates the need for time-consuming wire manipulation and reduces sharps exposure during application and removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The IMF screw acts as an intermediary element that bridges the arch bar and the mandible bone. By providing a pre-installed bone-borne anchor point, the screw mediates the connection between the dental arch bar system and the skeletal structure, eliminating the need for complex wire configurations and reducing the time required for secure fixation while minimizing staff exposure to sharp objects.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of stationary object

If conventional Erich arch bars are used, then durable fixation is achieved, but oral hygiene is compromised and patient comfort is reduced

Engineering Contradiction:

Improvefixation durationVSAvoidoral hygiene compromise

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

Instead of using sharp wire ends that protrude outward for securing the arch bar, the invention inverts the approach by embedding the securing mechanism (IMF screw) directly into the bone structure. This inversion allows the arch bar to be secured without protruding sharp elements, thereby maintaining durable fixation while improving oral hygiene and patient comfort during the extended wear period.

Inventive Principle:

Principle #13The other way round (Inversion)

3Loss of time

If IMF screws are used for bone-borne fixation, then application time is shortened and sharps exposure is reduced, but dental root injury risk increases

Engineering Contradiction:

Improveapplication timeVSAvoiddental root injury risk

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The arch bar serves as an intermediary structure that distributes the fixation load across multiple teeth rather than concentrating force at a single bone insertion point. This intermediary approach allows the IMF screw to be installed quickly with reduced sharps exposure while the arch bar disperses mechanical stresses, thereby minimizing the risk of dental root injury despite the use of bone-borne fixation.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If conventional wiring techniques are used, then occlusal fixation is achieved, but the system integrates inconsistently with modern surgical protocols emphasizing early mobilization

Engineering Contradiction:

Improveocclusal fixationVSAvoidintegration with modern surgical protocols

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The hybrid device combines the occlusal fixation capability of traditional arch bars with the rapid installation and early mobilization benefits of IMF screws into a single universal system. This multi-functional design allows the device to integrate seamlessly with modern surgical protocols that emphasize early jaw mobilization while maintaining reliable occlusal fixation, making it adaptable to various contemporary maxillofacial surgical procedures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260069446A1System and device for maxillomandibular fixation

Publication Date: 2026.03.12 INVISIAN MEDICAL LLC

AI summary

An arch bar system for maxillomandibular fixation is disclosed. A contourable, trim-to-fit bar includes a series of elongated oval apertures oriented substantially parallel to the bar axis. The apertures guide wire, coated suture, or other ligatures at varied approach angles, limit vertical clearance to resist slippage, and cooperate with intervening structural columns to distribute loads while the bar is cinched to teeth. Low-profile depending attachment features—cleats and/or J-hooks—project below the lower edge to receive interarch wire loops, guiding elastics, or other connectors. All patient-facing edges and transitions are radiused to minimize gingival and mucosal trauma. Bars may be metal or engineered polymer and segmentable for partial-arch use. Methods include threading ligatures through successive apertures to secure each bar and joining opposing bars at the depending features. Kits include paired bars, ligatures, interarch connectors, and tools.