Derivative works — US Patent 11744686

This Defensive Disclosure document for US Patent 11744686 aims to create prior art that may render future incremental improvements by competitors "obvious" or "non-novel." The focus is on the independent claims, specifically Claim 1 (mouthpiece with internal bridge structure) and Claim 12 (mouthpiece with suction connector cutout and cheek retractor).

Defensive Disclosure for US Patent 11744686

Derivatives of Claim 1: Mouthpiece with Internal Bridge Structure

Claim 1 Summary: A mouthpiece comprising a main body with an interior space, having a first wall (anterior) with a longitudinal slit opening for fluid entry, a second wall (posterior) at a distance from the first wall, a connecting wall, and a wave-shaped bridge structure integral with and protruding from the interior surface of the second wall, extending towards but not attached to the first wall, comprising crests and troughs.

Derivative 1.1: Material & Component Substitution - Biodegradable Multi-Material Design

Enabling Description: This derivative features a mouthpiece where the main body, first wall, second wall, and connecting wall are fabricated from a thermoplastic biodegradable polymer such such as polyhydroxyalkanoates (PHA) or polylactic acid (PLA) blended with a soft elastomeric bio-plasticizer (e.g., acetyl tributyl citrate) to achieve flexibility. The wave-shaped bridge structure, while still integral to the second wall, is co-injection molded from a stiffer, high-strength, biodegradable polymer (e.g., a higher molecular weight PLA or cellulose acetate) to ensure structural integrity and consistent wall separation under suction. The longitudinal slit opening on the first wall incorporates a thin, flexible, bio-absorbable membrane (e.g., oxidized regenerated cellulose) that is designed to mechanically rupture upon the first use or dissolve rapidly in oral fluids, initiating fluid flow and preventing premature debris entry during packaging and handling.

classDiagram
    class Mouthpiece {
        +MainBody: Biodegradable Polymer (PHA/PLA)
        +FirstWall: Biodegradable Polymer (PHA/PLA)
        +SecondWall: Biodegradable Polymer (PHA/PLA)
        +ConnectingWall: Biodegradable Polymer (PHA/PLA)
        +BridgeStructure: Stiffer Biodegradable Polymer (PLA/Cellulose Acetate)
        +SlitOpening: Bio-absorbable Membrane
    }
    class BiodegradablePolymer {
        +Flexibility: Low-Med
        +DegradationRate: Controlled
        +Biocompatibility: High
    }
    class StifferBiodegradablePolymer {
        +Flexibility: Low
        +Strength: High
        +DegradationRate: Controlled
    }
    class BioAbsorbableMembrane {
        +TensileStrength: Low
        +DissolutionRate: High
    }
    Mouthpiece --o BiodegradablePolymer : Composed of
    Mouthpiece --o StifferBiodegradablePolymer : Includes
    Mouthpiece --o BioAbsorbableMembrane : Contains

Derivative 1.2: Operational Parameter Expansion - High-Volume Aspiration for Maxillofacial Surgery

Enabling Description: This mouthpiece is scaled for use in large oral cavities during extensive maxillofacial surgical procedures. The main body is constructed from medical-grade, autoclavable, high-tear-strength liquid silicone rubber (LSR) with enhanced chemical resistance for prolonged exposure to surgical irrigants and blood. The interior space and the dimensions of the wave-shaped bridge structure (crests and troughs) are significantly increased to accommodate high-volume fluid and debris aspiration (e.g., bone fragments, tissue slurry) at flow rates up to 50 liters per minute. The longitudinal slit opening on the first wall is widened and reinforced at its edges with a slightly thicker silicone bead to prevent tearing under high negative pressure differentials, enabling rapid ingress of larger volumes of material. The overall structure is designed to maintain its form and function under continuous high-suction vacuum levels exceeding -500 mmHg.

flowchart TD
    A[Start Surgical Procedure] --> B{Insert Mouthpiece};
    B --> C[Activate High-Volume Suction];
    C --> D{Fluids & Debris in Oral Cavity};
    D -- Large Volume Flow --> E[Slit Opening Widened];
    E --> F[Interior Space Enhanced];
    F --> G{Fluid/Debris navigate Troughs};
    G --> H[Bridge Structure Maintains Wall Separation];
    H --> I[Aspiration to External Vacuum Source];
    I --> J[Continuous Monitoring];
    J -- High Suction -500mmHg --> C;
    J -- Procedure Complete --> K[Deactivate Suction];

Derivative 1.3: Cross-Domain Application - Bio-Fermentation Reactor Agitator and Cell Separator

Enabling Description: This adaptation applies the core mechanism to bio-fermentation. The "main body" is a flexible, autoclavable bioreactor liner made of medical-grade silicone or PTFE, designed to fit inside a larger fermentation vessel. The "first wall" is the inner surface facing the fermentation broth, and the "second wall" is the outer surface against the rigid bioreactor wall. The longitudinal "slit opening" acts as a controlled inlet for nutrient media or a controlled outlet for supernatant. The "bridge structure" on the "second wall" serves as an integrated, passive agitator when the flexible liner is vibrated or oscillated. The wave-like protrusions create localized turbulence, ensuring uniform mixing of the fermentation broth and preventing cell aggregation, while the troughs facilitate directed flow of fluids and prevent cell accumulation against the outer wall, thereby acting as a cell separator for harvest via a gentle negative pressure applied to the "interior space" (between the flexible liner and rigid vessel wall).

graph TD
    A[Bioreactor Vessel] -- Contains --> B(Flexible Liner - Main Body);
    B -- Inner Surface --> C(First Wall - Fermentation Broth Interface);
    B -- Outer Surface --> D(Second Wall - Rigid Vessel Interface);
    D -- Integral Protrusions --> E(Bridge Structure - Passive Agitator);
    C -- Slit Opening --> F(Nutrient/Supernatant Inlet/Outlet);
    G[Vibration/Oscillation Mechanism] -- Induces --> E;
    E -- Creates Turbulence --> H(Uniform Broth Mixing);
    H -- Prevents --> I(Cell Aggregation);
    E -- Troughs Facilitate --> J(Directed Fluid Flow);
    K[Negative Pressure System] -- Applied to --> L(Interior Space - Cell Separation);
    L -- Harvests --> M(Separated Cells);

Derivative 1.4: Integration with Emerging Tech - IoT-Enabled Biometric Mouthpiece

Enabling Description: This derivative embeds micro-electromechanical systems (MEMS) sensors within the mouthpiece structure to provide real-time intraoral biometric data. pH sensors (e.g., ion-selective field-effect transistors, ISFETs) are integrated along the length of the first wall adjacent to the slit opening to monitor saliva pH levels. Temperature sensors (e.g., thermistors) are distributed across the bridge structure and cheek retractor. A micro-fluidic channel system, integrated within the troughs of the bridge structure, is equipped with impedance sensors for detecting changes in fluid viscosity and flow rate, indicating saliva consistency and volume. A low-power Bluetooth Low Energy (BLE) module, encapsulated in a biocompatible epoxy within the suction connector, transmits this data to a paired dental unit or a mobile device. An AI algorithm running on the receiving device analyzes the data to optimize suction intensity, duration, and potentially recommend specific dental interventions or patient hydration adjustments based on real-time oral conditions.

sequenceDiagram
    participant P as Patient Mouthpiece
    participant M as MEMS Sensors (pH, Temp, Impedance)
    participant B as BLE Module
    participant GW as Gateway/Dental Unit/Mobile App
    participant A as AI Algorithm
    participant DB as Cloud Database

    P->>M: Oral Fluids/Environment
    M-->>B: Real-time Biometric Data (pH, Temp, Viscosity, Flow)
    B-->>GW: Encrypted BLE Transmission
    GW->>A: Forward Data
    A->>A: Analyze & Optimize Suction Parameters
    A->>P: (Via Dental Unit) Adjust Suction
    A-->>DB: Store Anonymized Data (Optional)
    DB-->>GW: Provide Historical/Comparative Data

Derivative 1.5: The "Inverse" or Failure Mode - Self-Relieving Occlusion Mouthpiece

Enabling Description: This mouthpiece is designed to safely mitigate the risks associated with suction occlusion. The main body and bridge structure are constructed from a flexible, medical-grade silicone elastomer. The wave-shaped bridge structure incorporates micro-perforations (e.g., 0.5 mm diameter) in the troughs, connecting the interior space directly to the exterior oral cavity, distinct from the primary suction slit. These micro-perforations are normally sealed by the compliant anterior wall under normal operating vacuum, ensuring efficient suction. However, upon detection of a significant increase in differential pressure (indicating occlusion) or a drop in flow rate in the main evacuation conduit (monitored by a pressure/flow sensor in the attached vacuum adapter, not part of the mouthpiece itself), the main body of the mouthpiece is designed to temporarily deform. This deformation causes the anterior wall to gently separate from the crests of the bridge structure, and critically, the micro-perforations in the troughs to "unseal" and allow ambient air or oral fluids to enter the interior space, rapidly equalizing pressure and preventing tissue trauma from sustained high vacuum. This "self-relieving" action functions as a passive safety mechanism.

stateDiagram-v2
    state Normal_Operation {
        [*] --> Suction_Active
        Suction_Active --> Walls_Separated : Bridge Functioning
        Walls_Separated --> Troughs_Aspirating
        Troughs_Aspirating --> Micro_Perforations_Sealed
    }
    state Occlusion_Detected {
        Micro_Perforations_Sealed --> Pressure_Increase : Flow Rate Drop
        Pressure_Increase --> Walls_Deform : Anterior Wall Release
        Walls_Deform --> Micro_Perforations_Unsealed
        Micro_Perforations_Unsealed --> Pressure_Equalization : Ambient Air Ingress
        Pressure_Equalization --> Suction_Relieved
    }
    Suction_Active --> Occlusion_Detected : High Differential Pressure
    Occlusion_Detected --> Normal_Operation : Occlusion Cleared/Suction Resumed

Derivatives of Claim 12: Mouthpiece with Suction Connector Cutout and Cheek Retractor

Claim 12 Summary: A mouthpiece comprising a main body (first end wider, second end narrower, first wall, second wall, connecting wall, wave-shaped bridge structure on the second wall, not attached to first wall), a suction connector extending from the first end with an evacuation conduit and a cutout shape for interlocking with a vacuum adapter, and a cheek retractor at the second end.

Derivative 2.1: Material & Component Substitution - Modular Hybrid Construction

Enabling Description: This derivative features a mouthpiece with a modular hybrid construction. The main body (including the first, second, and connecting walls, and the internal bridge structure) is injection-molded from a translucent, flexible, autoclavable medical-grade silicone. The suction connector, however, is molded from a rigid, autoclavable, medical-grade polycarbonate or polysulfone, which is co-molded or permanently bonded to the flexible main body at the first end. This rigid connector ensures a robust, stable interface with the vacuum adapter. The cutout shape on the suction connector is precision-machined or molded for exact interlocking. The cheek retractor at the second end is also a detachable, modular component, allowing for interchangeability of different sizes or configurations (e.g., with integrated bite blocks, or varying stiffness). It features a secure, quick-release mechanical interlock (e.g., a snap-fit or bayonet mount) to the main body, fabricated from a semi-rigid thermoplastic elastomer (TPE) with varying durometers for customized patient comfort and retraction force.

classDiagram
    class Mouthpiece {
        +MainBody: Silicone
        +SuctionConnector: Polycarbonate/Polysulfone
        +CheekRetractor: TPE
    }
    class MainBody {
        +FirstWall()
        +SecondWall()
        +ConnectingWall()
        +BridgeStructure()
    }
    class SuctionConnector {
        +EvacuationConduit()
        +CutoutShape: Rigid
        +InterlockAdapter(VacuumAdapter)
    }
    class CheekRetractor {
        +RetractionSurface()
        +DetachableMechanism()
        +VariableDurometer: TPE
    }
    Mouthpiece "1" -- "1" MainBody : contains
    Mouthpiece "1" -- "1" SuctionConnector : contains
    Mouthpiece "1" -- "1" CheekRetractor : contains
    SuctionConnector -- "1" VacuumAdapter : interlocks_with

Derivative 2.2: Operational Parameter Expansion - Cryogenic Dental Isolation System

Enabling Description: This mouthpiece is designed for dental procedures requiring localized hypothermia or cryo-analgesia (e.g., nerve desensitization, post-surgical swelling reduction). The main body, suction connector, and cheek retractor are molded from a specialized low-temperature flexible silicone or cryo-compatible thermoplastic polyurethane (TPU) that maintains elasticity and structural integrity down to -40°C. The suction connector includes an additional, concentric channel for the controlled delivery and evacuation of a cryo-fluid (e.g., chilled air, non-toxic coolant liquid). The internal bridge structure incorporates micro-channels that distribute this cryo-fluid across the posterior wall, radiating a controlled cold temperature to the oral tissues. The evacuation conduit in the suction connector is robustly insulated and designed to prevent condensation blockage at sub-zero temperatures. The cutout shape is engineered for secure, leak-proof attachment to a specialized cryogenic vacuum adapter that manages both suction and cryo-fluid recirculation.

graph TD
    A[Cryogenic Vacuum Adapter] -- Connects via Cutout --> B(Suction Connector);
    B -- Evacuation Conduit --> C(Main Body Interior Space);
    B -- Concentric Channel --> D(Cryo-Fluid Delivery/Evacuation);
    D -- Distributes via Micro-Channels --> E(Bridge Structure - Posterior Wall);
    E -- Delivers --> F(Localized Hypothermia/Cryo-Analgesia);
    C -- Removes --> G(Oral Fluids/Debris);
    G --> B;
    H[Low-Temperature Flexible Silicone/TPU] -- Material For --> B, C, I(Cheek Retractor);
    B -- Insulated --> B;
    style A fill:#lightblue,stroke:#333,stroke-width:2px
    style F fill:#ADD8E6,stroke:#333,stroke-width:2px

Derivative 2.3: Cross-Domain Application - Robotic Pick-and-Place Gripper with Integrated Cleaning

Enabling Description: This derivative transforms the mouthpiece into a specialized robotic gripper for delicate manufacturing or laboratory automation tasks, particularly involving small, irregular objects that require gentle handling and in-situ cleaning. The "main body" is a flexible, elastomer-coated end-effector. The "first wall" and "second wall" form a compliant chamber for enveloping an object. The "cheek retractor" functions as flexible, compliant fingers or lobes that gently conform to and stabilize the object during grasping. The "suction connector" acts as a multi-functional umbilical for the gripper, providing both vacuum (for gentle suction-assisted gripping and debris removal from the enclosed object) and, through the "cutout shape," interlocking with a robotic arm's tool changer for power and data. The internal "bridge structure" channels vacuum across the object's surface during gripping, simultaneously cleaning it while preventing full collapse onto the object and allowing for fluid/air flow and particle removal via the evacuation conduit. The longitudinal slit on the first wall can be used for controlled spray of cleaning solution or inert gas.

sequenceDiagram
    participant RA as Robotic Arm
    participant TC as Tool Changer
    participant G as Gripper (Mouthpiece Derivative)
    participant O as Object
    participant S as Suction/Cleaning System

    RA->>TC: Select Gripper
    TC->>G: Interlock (Cutout)
    RA->>G: Position for Grasp
    G->>G: Cheek Retractor Grips/Stabilizes O
    G->>S: Activate Vacuum/Cleaning (Suction Connector)
    S->>G: Vacuum/Cleaning Fluid Flow
    G->>O: Bridge Structure Cleans O
    G->>G: Evacuation Conduit Removes Debris
    G->>O: Suction-Assisted Grasp
    RA->>O: Move/Place Object
    G->>G: Release Object (Deactivate Suction/Retraction)

Derivative 2.4: Integration with Emerging Tech - AI-Powered Adaptive Oral Care System with Blockchain Verification

Enabling Description: This mouthpiece integrates AI and blockchain for advanced, personalized oral care. The cheek retractor incorporates embedded electromyography (EMG) sensors and micro-pressure transducers to monitor patient jaw muscle activity and cheek tissue compliance in real-time. This data is fed to an on-board, low-power AI inference chip within the suction connector, which adaptively adjusts the retraction force of the cheek retractor (if pneumatically controlled) or provides feedback to the dental professional. The suction connector also contains a unique, tamper-proof NFC/RFID tag. Each sterilization cycle and patient use event is recorded via a dedicated scanner and committed to a distributed ledger technology (DLT) blockchain network (e.g., using Hyperledger Fabric or Ethereum for enterprise DLT). This immutable record verifies the device's authenticity, tracks its usage history, sterilization compliance, and remaining service life, optimizing infection control protocols and supply chain management in a multi-use context. The cutout shape on the suction connector includes an integrated data pin interface for direct connection to the dental unit's control system and the blockchain network.

erDiagram
    Mouthpiece ||--o{ Patient : "used by"
    Mouthpiece {
        string ID PK
        string Material
        float LastSterilizationDate
        int UseCount
    }
    Patient {
        string ID PK
        string Name
        string OralConditionData
    }
    Sensors {
        string Type
        string Location
        string DataOutput
    }
    AI_Module {
        string ProcessorType
        string Function
    }
    Blockchain_Network {
        string BlockID PK
        string TransactionData
        string Timestamp
        string DeviceID FK "Mouthpiece.ID"
    }

    Mouthpiece }o--|| Sensors : "integrates"
    Mouthpiece }o--|| AI_Module : "hosts"
    Mouthpiece ||--o{ Blockchain_Network : "records_to"
    Sensors ||--o{ AI_Module : "feeds_data_to"

Derivative 2.5: The "Inverse" or Failure Mode - Single-Use "Fail-Safe" Disposal Mouthpiece

Enabling Description: This mouthpiece is designed for guaranteed single-patient use with an integrated, irreversible "fail-safe" disposal mechanism. The main body, suction connector, and cheek retractor are made of a medical-grade, single-use polymer (e.g., polypropylene or polystyrene) optimized for low-cost, high-volume manufacturing. The suction connector's cutout shape for interlocking with the vacuum adapter contains a pre-stressed, brittle plastic insert. After the first insertion and removal from a standard vacuum adapter, this insert is designed to fracture irreversibly, preventing subsequent secure attachment to any vacuum system. This renders the mouthpiece functionally unusable for suction, making accidental or intentional reuse impossible. Furthermore, a visible, non-toxic, moisture-activated dye is embedded in the material of the cheek retractor. Upon contact with oral fluids, this dye rapidly diffuses and stains the entire mouthpiece a bright, indelible color, visually indicating prior use and confirming it as medical waste.

stateDiagram-v2
    state New_Mouthpiece {
        [*] --> Unused
        Unused --> Functional_Suction
        Functional_Suction --> Cutout_Intact
        Cutout_Intact --> Dye_Inactive
    }
    state Used_Mouthpiece {
        Cutout_Intact --> Cutout_Fractured : First Insertion/Removal
        Dye_Inactive --> Dye_Activated : Contact with Oral Fluids
        Cutout_Fractured --> Suction_Disabled
        Dye_Activated --> Visibly_Used
        Suction_Disabled --> Rendered_Unreusable
        Visibly_Used --> Rendered_Unreusable
    }
    Functional_Suction --> Used_Mouthpiece : First Use

Combination Prior Art Scenarios

These scenarios combine elements of US11744686 with existing open-source standards, demonstrating how the invention, or its derivatives, could be made obvious when combined with publicly available knowledge and technology.

Mouthpiece with Integrated Open-Source Dental Light Standard:
- Description: An intraoral device, as described in Claim 12 of US11744686 (including the main body, bridge structure, suction connector with cutout, and cheek retractor), is manufactured with an integrated LED illumination system. The power and control for this illumination system conform to an open-source standard for dental light connectivity, such as the DMX512 (Digital Multiplex) standard for theatrical and architectural lighting control, adapted for medical low-voltage applications. The DMX interface would be miniaturized and integrated into the suction connector's cutout region, allowing the dental unit to not only provide suction but also control light intensity, color temperature, and pulse modes of LEDs embedded within the mouthpiece (e.g., along the superior and inferior walls of the main body and the cheek retractor). The open nature of DMX allows any dental equipment manufacturer to interface with and control the lighting without proprietary restrictions.
- Enabling Description: LEDs (e.g., medical-grade SMD LEDs) are encapsulated in the translucent silicone of the mouthpiece during injection molding. Micro-wires run through the main body to a miniature DMX decoder and power receiver circuit embedded in the rigid suction connector. The cutout of the suction connector contains corresponding electrical contacts that align with a DMX-enabled vacuum adapter, drawing power and receiving control signals from the dental unit's DMX controller. The DMX protocol ensures standardized digital communication for lighting parameters.
Mouthpiece with Real-time IoT Sensor Data and HL7 Integration:
- Description: The IoT-enabled biometric mouthpiece (Derivative 1.4 or 2.4, featuring embedded pH, temperature, and flow sensors) is designed to transmit its collected intraoral data to an Electronic Health Record (EHR) system. The data transmission and formatting adhere to the Health Level Seven (HL7) Fast Healthcare Interoperability Resources (FHIR) standard. The Bluetooth Low Energy (BLE) module within the mouthpiece transmits raw sensor data to a local gateway (e.g., the dental unit). This gateway then processes and formats the data into FHIR resources (e.g., an "Observation" resource for each sensor reading, linked to a "Patient" resource and an "Encounter" resource). These FHIR resources are then securely transmitted to the dental clinic's EHR, allowing real-time patient monitoring and long-term data trending to be standardized and interoperable across different healthcare systems.
- Enabling Description: The BLE module (e.g., Nordic Semiconductor nRF52 series) within the mouthpiece connects to a proprietary gateway (e.g., a custom application running on the dental unit's embedded PC). This gateway software stack includes a FHIR client library (e.g., HAPI FHIR for Java or FHIR-JS for JavaScript). Sensor data (pH, temp, flow) is mapped to appropriate FHIR Observation profiles (e.g., LOINC codes for each measurement). RESTful API calls are then used to push these FHIR Observation resources to the EHR system's FHIR server endpoints, ensuring semantic and syntactic interoperability according to the FHIR standard.
Mouthpiece for Robotic Dental Assistance with ROS Integration:
- Description: A specialized version of the mouthpiece, particularly the suction connector with its precise cutout for interlocking (Claim 12), is adapted for use with robotic dental assistance systems. The robotic arm controlling the mouthpiece integrates with the Robot Operating System (ROS), an open-source framework for robotic software development. The suction connector's cutout is designed to mate with a standardized ROS-compatible end-effector interface on a dental robotic arm. The ROS framework would manage the precise positioning, orientation, and force control of the mouthpiece within the oral cavity. For example, a ROS node could interpret dental imaging data to autonomously guide the mouthpiece for optimal suction and retraction during a procedure, while another ROS node monitors patient head movements and adaptively repositions the mouthpiece. The evacuation conduit and internal bridge structure of the mouthpiece would function as described, but under the precise, software-controlled guidance of the ROS system.
- Enabling Description: The dental robotic arm's end-effector features a mechanical and electrical interface that is explicitly defined within the ROS ecosystem as a "dental tool" message type. The mouthpiece's suction connector cutout (e.g., a specific male/female dovetail or quick-release coupling) is manufactured to align with this standard interface. A ROS driver for the specific dental robot would expose functionalities like move_to_position, apply_retraction_force, and activate_suction as ROS services or topics. The mouthpiece's connection interface would include power for any on-board sensors or adaptive elements (as in derivatives 1.4/2.4) and a data link for communication with the ROS controller (e.g., via a miniaturized Ethernet or CAN bus over the same connector pins). This allows for modular control and programming using standard ROS tools (e.g., RViz for visualization, MoveIt! for motion planning).