Derivative works — US Patent 12156781

Defensive Disclosure: Expanding the Prior Art Landscape for US Patent 12156781

Date: 2026-05-16

This document serves as a defensive disclosure, aiming to expand the existing body of prior art related to US Patent 12156781, titled "Screw-attached pick-up dental coping system and methods." The objective is to proactively disclose derivative variations and alternative embodiments that could be considered obvious or non-novel improvements by competitors. This disclosure covers conceptual extensions across material science, operational parameters, cross-domain applications, integration with emerging technologies, and failure modes, ensuring a broader and more robust prior art landscape.

Derivatives for Independent Claim 1: Temporary Alignment Fastener System

Independent Claim 1: A system for aligning a dental implant abutment, coping and separable dental element for definitive screw-attachment comprising: a. a temporary alignment fastener comprising: b. a post having an axis, a first post end and second post end, wherein the first post end is threaded for screw attachment to the implant abutment; c. a cap, wherein the cap is attached to the second post end; and wherein the temporary alignment screw is configured to hold the coping against the implant abutment when the first post end is screwed into the implant abutment and wherein the cap is separable from the post through a release force directed away from the first post end.

Derivative 1.1: Material & Component Substitution - Bioresorbable Polymer Fastener with Tunable Degradation

Enabling Description:
This variation proposes a temporary alignment fastener where both the post and the separable cap are fabricated from bioresorbable polymers, such as poly-L-lactic acid (PLLA), polyglycolic acid (PGA), or polydioxanone (PDO). The threaded first post end is injection molded or 3D printed with a PLLA composite for enhanced stiffness and strength during initial screw-attachment. The cap, attached to the second post end via a snap-fit or interference fit, is composed of a more rapidly degrading polymer (e.g., PGA) or a PLLA/PGA blend with specific porosity. The degradation rate of the cap is tuned by controlling polymer ratio, crystallinity, and surface area, allowing it to weaken and separate from the post within a predetermined timeframe (e.g., 5-15 minutes) upon exposure to oral fluids or a localized catalytic rinse. This eliminates the need for manual axial force application for cap separation. The residual bioresorbable post portion would further degrade and resorb, preventing the need for unscrewing, or be sufficiently weakened to allow non-rotational extraction.

graph TD
    A[Bioresorbable Polymer Temporary Fastener] --> B{Post (PLLA Composite)};
    A --> C{Cap (PGA Blend)};
    B --> D[Threaded First End (Abutment Attachment)];
    C --> E[Snap-Fit/Interference Fit];
    F{Oral Fluids/Catalytic Rinse} --> C;
    C -- "Tunable Degradation (5-15 min)" --> G[Cap Weakens/Separates from Post];
    G --> H[Coping Released];
    B -- "Residual Post Degradation" --> I[No Manual Uncrewing/Easy Extraction];

Derivative 1.2: Operational Parameter Expansion - Micro-Scale, High-Frequency Vibrational Release System

Enabling Description:
This derivative envisions a micro-scale temporary alignment fastener, suitable for pediatric or highly localized single-implant applications. The post, fabricated from a high-strength titanium alloy (e.g., Ti-6Al-4V), features micro-threads. The cap, also titanium, is attached to the second post end using a frictional interference fit facilitated by an array of piezoelectric micro-actuators integrated into the cap's internal surface. These actuators are designed to resonate at ultrasonic frequencies (e.g., 20-100 kHz) when energized by a portable, inductive coupling device. Applying a specific frequency and amplitude of ultrasonic vibration to the cap for a brief duration (e.g., 1-5 seconds) temporarily reduces the coefficient of friction at the cap-post interface, allowing for easy axial separation with minimal force. The vibration ensures uniform and predictable release across multiple micro-fasteners simultaneously in multi-coping applications.

graph TD
    A[Micro-Scale Fastener] --> B[Ti-Alloy Post];
    A --> C[Ti-Alloy Cap];
    B --> D[Micro-Threads (Abutment)];
    C --> E[Piezoelectric Micro-Actuators];
    F[Inductive Coupling Device] --> G{High-Frequency (20-100 kHz) Ultrasonic Vibration};
    G --> E;
    E -- "Reduces Frictional Interference" --> H[Cap Separates Axially];
    H --> I[Coping Released];

Derivative 1.3: Cross-Domain Application - Precision Alignment for Micro-Optic Modules

Enabling Description:
This system is adapted for precision alignment and temporary retention of micro-optic modules (e.g., lens arrays, sensor chips) onto a substrate in a complex optical assembly. The "implant abutment" becomes a precision-machined receptacle on the optical bench, featuring female micro-threads. The "coping" is replaced by a micro-optic module carrier, with a distal end mating surface and a central aperture. The temporary alignment fastener consists of a stainless steel (e.g., 316L) threaded post and a separable polyether ether ketone (PEEK) cap. The cap is attached to the post via a precisely machined shear pin, designed to break at a controlled axial force. During assembly, the micro-optic module carrier is positioned, and the temporary fastener is screwed in, seating the carrier. After a UV-curing adhesive secures the carrier to the substrate, an axial puller tool applies a calibrated force to the cap, shearing the pin and releasing the cap. The post is then unscrewed, allowing for the installation of a definitive, low-profile retaining screw or a permanent adhesive bond.

graph TD
    A[Optical Bench] --> B[Precision Receptacle (Female Micro-threads)];
    C[Micro-Optic Module Carrier (Coping equivalent)] --> D[Distal Mating Surface];
    C --> E[Central Aperture];
    F[Temporary Fastener] --> G[Stainless Steel Post (Micro-threads)];
    F --> H[PEEK Cap];
    G --> I[Shear Pin Mechanism];
    H -- "Shear Pin Attachment" --> G;
    J[Module Carrier Placed] --> B;
    K[Fastener Screwed In] --> J;
    L[UV-Curing Adhesive] --> J;
    M[Axial Puller Tool] --> H;
    M -- "Calibrated Axial Force" --> I[Shear Pin Fractures];
    H --> N[Cap Separates];
    G --> O[Post Unscrewed];

Derivative 1.4: Integration with Emerging Tech - IoT-Enabled Force-Sensing Fastener with Predictive Maintenance

Enabling Description:
This derivative incorporates an IoT-enabled temporary alignment fastener. The cap, made of a compliant polymer (e.g., medical-grade silicone or specialized elastomer), integrates an embedded micro-electromechanical system (MEMS) force sensor and a low-power Bluetooth Low Energy (BLE) module. The force sensor continuously monitors the axial retention force between the cap and the post, which is designed with a graduated interference fit. The BLE module transmits real-time force data to a local gateway and cloud platform. An AI-driven optimization algorithm in the cloud analyzes this data, alongside patient-specific biomechanical models and historical data, to predict the optimal time and precise force required for cap separation. This "predictive release" ensures consistent coping pick-up outcomes and informs the clinician via a tablet interface on the ideal axial force to apply. The cap also incorporates a unique blockchain-traceable identifier for supply chain verification and authenticity.

graph TD
    A[IoT-Enabled Fastener] --> B[Post (Graduated Interference Fit)];
    A --> C[Compliant Cap];
    C --> D[MEMS Force Sensor];
    C --> E[BLE Module];
    E --> F[Local Gateway];
    F --> G[Cloud Platform (AI Optimization)];
    D -- "Real-time Force Data" --> E;
    G -- "Predictive Release Info" --> H[Clinician Tablet];
    C --> I[Blockchain ID];
    H --> J[Optimal Axial Release Force Applied];
    J --> K[Cap Separates];

Derivative 1.5: The "Inverse" or Failure Mode - Reversible, Low-Retention Fastener for Diagnostic Probing

Enabling Description:
This "inverse" embodiment is a temporary alignment fastener designed for ultra-low retention and easy, non-destructive removal, primarily for diagnostic or provisional probing applications where repeated, gentle attachment and detachment of a coping is required without bonding. The post is manufactured from a flexible superelastic alloy (e.g., Nitinol) with a minimal thread profile, allowing for quick, low-torque engagement with the abutment. The cap is attached to the second post end via a magnetic coupling (e.g., neodymium micro-magnets) with a precisely controlled attractive force. This magnetic force is designed to be just sufficient to hold the coping in position under gravity and gentle manipulation, but easily overcome by a minimal axial pull force (e.g., <50g). The superelastic post, if slightly misaligned, self-corrects upon release, preventing thread damage. This system enables rapid diagnostic checks or sequential provisional restorations without the commitment of a "pick-up" process.

graph TD
    A[Reversible Low-Retention Fastener] --> B[Nitinol Post (Minimal Thread Profile)];
    A --> C[Cap (Neodymium Micro-Magnets)];
    B --> D[Abutment (Low-Torque Engagement)];
    C --> E[Magnetic Coupling];
    E -- "Controlled Attraction (<50g)" --> B;
    F{Diagnostic Probing/Provisional Attachment} --> A;
    G[Minimal Axial Pull Force] --> E[Magnetic Coupling Separates];
    G --> C[Cap Detaches];
    B[Post Self-Corrects/Remains Engaged];

Derivatives for Independent Claim 14: Coping and Temporary Screw System with Engagement Means

Independent Claim 14: A system for aligning a separable dental element for installation to a threaded implant abutment with a definitive screw having a head and threaded shaft portion comprising: a coping having a distal end shaped to engage with the implant abutment and a proximal end with an aperture sized to allow the shaft portion of the definitive screw to pass through; a temporary screw having a distal end portion adapted to engage the threads of the implant abutment and a proximal end portion having temporary engagement means for attachment adjacent to the proximal end of the coping wherein the temporary screw holds the distal end of the coping in alignment against the implant abutment when the distal end portion of the temporary screw engages the implant abutment threads and wherein the temporary engagement means releases the coping without disengaging the post portion of the temporary screw upon the application of a predetermined axial force in the proximal direction.

Derivative 14.1: Material & Component Substitution - Thermoplastic Coping with Integrated Shape Memory Alloy Engagement

Enabling Description:
This derivative features a coping injection molded from a high-performance thermoplastic (e.g., PEEK or Ultem) with an integrated temporary engagement means. The engagement means consists of a ring of shape memory alloy (SMA) such as Nitinol, embedded just below the proximal aperture of the coping. This SMA ring is designed to be in a contracted state at oral temperatures, creating a tight interference fit with a complementary groove on the proximal end portion of a titanium temporary screw. Upon application of a predetermined axial force (e.g., pulling the dental element proximally), the SMA ring deforms plastically at the localized stress point, allowing the coping to release from the temporary screw's engagement means without disengaging the screw from the abutment. The SMA's unique properties enable robust retention during alignment and a controlled, predictable release without fragmentation.

graph TD
    A[Thermoplastic Coping] --> B[Distal End (Abutment Engage)];
    A --> C[Proximal End Aperture];
    A --> D[Embedded SMA Ring (Nitinol)];
    E[Titanium Temporary Screw] --> F[Distal End (Abutment Threads)];
    E --> G[Proximal End (Complementary Groove)];
    D -- "Interference Fit (Oral Temp)" --> G;
    H[Dental Element Pick-up] --> I[Predetermined Axial Force (Proximal)];
    I --> D[SMA Ring Deforms];
    A --> J[Coping Releases from Temporary Screw];
    F[Temporary Screw Remains Engaged];

Derivative 14.2: Operational Parameter Expansion - High-Pressure Fluidic Release Engagement Means

Enabling Description:
In this embodiment, the temporary engagement means on the proximal end portion of the temporary screw utilizes a micro-fluidic channel system. The coping's proximal aperture features a series of inwardly projecting, flexible micro-flaps made of a biocompatible elastomer (e.g., medical-grade silicone). The temporary screw's proximal end has a sealed internal reservoir connected to a micro-nozzle array positioned to interface with the micro-flaps. To release the coping, a transient, high-pressure pulse of sterile saline solution (e.g., 50-100 psi for 0.1 seconds) is injected into the reservoir via a small port on the occlusal side of the temporary screw. This fluidic pressure momentarily forces the micro-flaps outwards, disengaging their grip on the temporary screw, allowing for axial separation of the coping from the temporary screw without affecting the temporary screw's engagement with the abutment threads.

graph TD
    A[Coping] --> B[Proximal Aperture (Flexible Micro-Flaps)];
    C[Temporary Screw] --> D[Distal End (Abutment Threads)];
    C --> E[Proximal End (Internal Fluid Reservoir)];
    E --> F[Micro-Nozzle Array];
    B -- "Interference Fit" --> F;
    G[High-Pressure Fluid Injection (Saline)] --> E;
    G -- "Momentary (0.1s) Pulse" --> H[Micro-Flaps Force Outwards];
    H --> I[Coping Releases Axially];
    D[Temporary Screw Remains Engaged];

Derivative 14.3: Cross-Domain Application - Modular Robotic Gripper Tooling Alignment

Enabling Description:
This system is repurposed for rapid, repeatable alignment of modular robotic gripper tooling (the "coping") onto a robotic arm effector (the "implant abutment"). The abutment is a standardized, threaded interface on the robot arm. The gripper tooling has a distal end shaped to mate with the effector and a proximal aperture. The "temporary screw" is a quick-release alignment pin. Its distal end is threaded for secure engagement with the robotic arm effector. Its proximal end incorporates a temporary engagement means consisting of an electromagnetically actuated detent mechanism. When the gripper tooling is placed and the alignment pin screwed in, the detent pins extend to engage complementary recesses in the gripper tooling, providing robust temporary alignment. To release, a low-voltage electrical pulse from the robotic arm controller briefly retracts the detent pins, allowing the gripper tooling to be axially removed without unscrewing the alignment pin.

graph TD
    A[Robotic Arm Effector (Abutment)] --> B[Standardized Threaded Interface];
    C[Modular Gripper Tooling (Coping)] --> D[Distal Mating Surface];
    C --> E[Proximal Aperture];
    C --> F[Complementary Recesses];
    G[Quick-Release Alignment Pin (Temporary Screw)] --> H[Threaded Distal End];
    G --> I[Electromagnetically Actuated Detent Mechanism];
    I -- "Detent Pins Extend" --> F;
    J[Tooling Placed & Pin Screwed In] --> B;
    K[Robotic Arm Controller] --> L[Low-Voltage Electrical Pulse];
    L --> I[Detent Pins Retract];
    M[Tooling Axially Removed];
    H[Alignment Pin Remains Engaged];

Derivative 14.4: Integration with Emerging Tech - AI-Optimized Adhesive Curing and Release System

Enabling Description:
This derivative utilizes an AI-optimized adhesive system for the temporary engagement means. The coping's proximal aperture features a chemically inert, porous surface coating. The temporary screw's proximal end incorporates a micro-dispenser for a two-part, UV-curable, heat-degradable adhesive. When the temporary screw is secured, a precise micro-volume of adhesive is dispensed, filling the porous interface and forming a temporary bond with controlled shear strength. An integrated optical sensor and micro-heater on the temporary screw monitor the adhesive's curing state and temperature. An AI algorithm, trained on adhesive degradation profiles, determines the optimal heat pulse (e.g., specific temperature and duration) required to thermally degrade the adhesive bond and release the coping. This process is triggered wirelessly from a handheld device, ensuring a clean, residue-free separation without disturbing the temporary screw's abutment engagement.

graph TD
    A[Coping] --> B[Proximal Aperture (Porous Coating)];
    C[Temporary Screw] --> D[Distal End (Abutment Threads)];
    C --> E[Proximal End (Micro-Adhesive Dispenser)];
    C --> F[Optical Sensor/Micro-Heater];
    E -- "Dispenses 2-Part UV/Heat-Degradable Adhesive" --> B[Forms Temporary Bond];
    G[Handheld Device (Wireless Trigger)] --> H[AI Algorithm (Adhesive Degradation)];
    H -- "Optimal Heat Pulse" --> F;
    F -- "Thermally Degrades Bond" --> I[Coping Releases Axially];
    D[Temporary Screw Remains Engaged];

Derivative 14.5: The "Inverse" or Failure Mode - Bio-Feedback Controlled "Soft Release" Temporary Screw

Enabling Description:
This "inverse" embodiment is designed for patient comfort and safety, prioritizing a "soft release" mechanism in the event of excessive removal force. The temporary engagement means consists of a series of frangible, micro-etched polymer struts (e.g., medical-grade PCL or PLGA) positioned on the proximal end of the temporary screw, designed to break sequentially rather than simultaneously. These struts engage a complementary undercut within the coping's proximal aperture. An integrated bio-feedback sensor (e.g., pressure sensor or electromyogram sensor) on the provisional prosthesis detects patient discomfort or excessive pulling force. If a threshold is exceeded, a haptic feedback mechanism in the clinician's removal tool warns of impending high-force separation. The sequential fracture of the struts ensures a gradual, "soft release" of the coping from the temporary screw, minimizing sudden impact or discomfort to the patient, even if the predetermined axial force is inadvertently exceeded. The post remains engaged.

graph TD
    A[Coping] --> B[Proximal Aperture (Complementary Undercut)];
    C[Temporary Screw] --> D[Distal End (Abutment Threads)];
    C --> E[Proximal End (Frangible Micro-Etched Polymer Struts)];
    E -- "Sequential Engagement" --> B;
    F[Provisional Prosthesis] --> G[Bio-Feedback Sensor (Pressure/EMG)];
    G -- "Detects Patient Discomfort/High Force" --> H[Clinician Removal Tool (Haptic Feedback)];
    I[Axial Release Force] --> E[Struts Fracture Sequentially];
    J[Coping Softly Releases];
    D[Temporary Screw Remains Engaged];

Derivatives for Independent Claim 22: Denture Conversion Alignment System and Method

Independent Claim 22: An alignment system for converting an existing denture for screw attachment to threaded implant abutments designed to perform the process of: a. mounting pick-up copings to the implant abutments with temporary fasteners, b. adhering the copings to cavities formed in the existing denture, c. pulling the denture with secured pick-up copings away from the implant abutments, d. unscrewing the threaded portions of the temporary fasteners from the implant abutments, e. forming definitive screw clearance holes in the denture, f. mounting the denture to the implant abutments with definitive screws that engage the same implant abutment threads as the temporary fasteners, wherein the unscrewing the threaded portions of the temporary fasteners and the forming definitive screw clearance holes in the denture may occur in either order.

Derivative 22.1: Material & Component Substitution - High-Performance Composite Denture with Integrated Smart Cavities

Enabling Description:
This derivative utilizes an existing denture fabricated from a high-performance fiber-reinforced composite material (e.g., PEEK with carbon fiber reinforcement). The cavities formed in the denture (step b) are pre-engineered "smart cavities" with an internal surface modified with a chemically active polymer layer that facilitates enhanced adhesion with specific pick-up coping adhesives (e.g., methacrylate-based). The pick-up copings are made from a ceramic-reinforced polymer (e.g., zirconia-filled PEEK). The temporary fasteners feature posts made of a high-strength ceramic (e.g., partially stabilized zirconia) with a specialized surface treatment for improved grip by a removal tool, and separable caps made of a low-durometer, thermoset polymer designed for controlled fracture release.

graph TD
    A[Existing Denture (High-Performance Composite)] --> B[Pre-engineered Smart Cavities (Chemically Active Polymer Layer)];
    C[Ceramic-Reinforced Polymer Pick-up Copings] --> D[Enhanced Adhesion with Cavities];
    E[Ceramic Post Temporary Fasteners (Zirconia)] --> F[Specialized Surface Treatment];
    G[Thermoset Polymer Cap (Controlled Fracture)] --> H[Separable from Post];
    I[Mount Copings with Fasteners] --> J[Adhere Copings to Cavities];
    K[Pull Denture with Copings] --> L[Caps Fracture/Release];
    M[Unscrew Ceramic Posts] --> N[Form Clearance Holes];
    O[Mount Denture with Definitive Screws];

Derivative 22.2: Operational Parameter Expansion - Cryogenic-Assisted, Non-Contact Removal of Fasteners

Enabling Description:
This method introduces cryogenic temperatures for the removal of temporary fasteners. After steps a, b, and c (mounting, adhering, and pulling the denture with copings), the denture with embedded copings and temporary fastener caps (but with posts still engaged in abutments) is cooled to a localized cryogenic temperature (e.g., -50°C to -80°C) using a directed flow of inert cryogenic gas (e.g., nitrogen). This extreme temperature causes differential thermal contraction between the temporary fastener post and the abutment threads, significantly reducing frictional engagement. A specialized non-contact magnetic extraction tool, operating on pulsed electromagnetic fields, is then used to axially pull the now loosely engaged temporary fastener posts from the abutments (step d) without rotation. This eliminates mechanical contact and potential thread wear during unscrewing. Definitive screw clearance holes (step e) are then formed, followed by final mounting (step f).

graph TD
    A[Mount Copings with Temp Fasteners];
    B[Adhere Copings to Denture];
    C[Pull Denture (Caps Separate)];
    D[Localized Cryogenic Cooling (-50°C to -80°C)];
    D --> E[Differential Thermal Contraction (Post/Abutment)];
    E --> F[Reduced Frictional Engagement];
    G[Non-Contact Magnetic Extraction Tool (Pulsed EM Fields)] --> H[Axially Pulls Posts];
    H --> I[Temporary Fasteners Removed (Non-Rotating)];
    J[Form Clearance Holes];
    K[Mount Denture with Definitive Screws];

Derivative 22.3: Cross-Domain Application - Prosthetic Limb Socket Adjustment for Robotics

Enabling Description:
This method adapts the denture conversion process to the field of robotics for fitting and adjusting a modular prosthetic limb socket to a robotic end-effector array. The "existing denture" is a pre-fabricated prosthetic limb socket. The "threaded implant abutments" are standardized mounting points on the robotic arm, equipped with internal threads. "Pick-up copings" are robust interface connectors specifically designed to bridge the robotic arm mounting points and the limb socket. "Temporary fasteners" are quick-release, shear-pin-based fasteners for initial alignment.
a. Robotic interface connectors (copings) are mounted to the robotic arm's mounting points (abutments) using quick-release, shear-pin temporary fasteners.
b. A rapid-set epoxy is used to adhere the connectors to pre-milled cavities in the prosthetic limb socket.
c. The limb socket with adhered connectors is pulled away from the robotic arm, with the shear pins fracturing to release the connectors from the temporary fasteners.
d. The remaining portions of the temporary fasteners are unscrewed from the robotic arm mounting points using a specialized tool.
e. Precision bore tools form definitive mounting holes in the limb socket.
f. The limb socket is mounted to the robotic arm using high-strength definitive bolts that engage the same threads as the temporary fasteners.

graph TD
    A[Robotic Arm] --> B[Standardized Mounting Points (Abutments)];
    C[Prosthetic Limb Socket (Existing Denture)];
    D[Robotic Interface Connectors (Pick-up Copings)];
    E[Quick-Release Shear-Pin Fasteners (Temporary Fasteners)];
    A1[Mount Connectors to Mounting Points with Fasteners (Step a)] --> B;
    A1 --> D;
    A1 --> E;
    F[Adhere Connectors to Socket Cavities with Rapid-Set Epoxy (Step b)] --> D;
    F --> C;
    G[Pull Socket with Connectors from Robotic Arm (Step c)] --> H[Shear Pins Fracture/Release];
    I[Unscrew Remaining Fastener Portions from Mounting Points (Step d)];
    J[Form Definitive Mounting Holes in Socket (Step e)];
    K[Mount Socket to Robotic Arm with Definitive Bolts (Step f)];
    I -- "Order interchangeable with" --> J;

Derivative 22.4: Integration with Emerging Tech - AR-Guided, AI-Optimized Cavity Milling and Fastener Alignment

Enabling Description:
This method integrates Augmented Reality (AR) and AI for real-time guidance and optimization of the denture conversion process.
a. Pick-up copings are mounted to implant abutments using temporary fasteners with integrated fiducial markers.
b. An AR headset worn by the clinician overlays a 3D digital model of the patient's oral cavity and the existing denture. AI algorithms analyze live camera feeds from the AR headset to precisely identify abutment positions and generate optimal cavity milling paths in the existing denture, displayed as virtual guides in the AR view.
c. An AI-driven robotic milling arm, guided by the AR system, precisely mills the cavities in the denture, adhering the copings.
d. The denture with secured pick-up copings is pulled away from the implant abutments, with the temporary fasteners axially separating.
e. AI analyzes the 3D scan of the converted denture to optimize the definitive screw clearance hole paths, displayed in the AR headset. A precision laser drilling system, also AR-guided, forms these holes.
f. The denture is mounted to the implant abutments with definitive screws. The AR system provides real-time torque feedback and alignment verification. The unscrewing of temporary fasteners (post-separation) and definitive hole formation can occur interchangeably, with AR/AI guiding both steps.

graph TD
    subgraph AR/AI System
        ARH[AR Headset (Clinician)]
        AIC[AI Algorithms (Cavity & Hole Path Opt.)]
        RMA[Robotic Milling Arm]
        LDS[Laser Drilling System]
    end

    A[Mount Copings (Fasteners w/ Fiducial Markers)];
    B[AR/AI Guides Cavity Milling (RMA)];
    C[Adhere Copings to Cavities];
    D[Pull Denture (Temporary Fasteners Axially Separate)];
    E[Unscrew Temporary Fastener Posts];
    F[AR/AI Guides Definitive Screw Clearance Hole Formation (LDS)];
    G[Mount Denture with Definitive Screws];

    A --> B;
    B --> C;
    C --> D;
    D --> E;
    D --> F;
    E -- "Order Independent" --> F;
    F --> G;
    ARH <--> AIC;
    AIC <--> RMA;
    AIC <--> LDS;

Derivative 22.5: The "Inverse" or Failure Mode - Expedited Emergency Conversion with Sacrificial Adhesion

Enabling Description:
This "inverse" method is designed for emergency situations where a rapid, albeit potentially less durable, conversion of an existing denture to screw attachment is paramount.
a. Pick-up copings are mounted to the implant abutments with temporary fasteners.
b. Instead of milling precise cavities, oversized, rough-textured cavities are rapidly created in the existing denture. A sacrificial, fast-setting, low-bond strength adhesive (e.g., cyanoacrylate-based or a rapid-curing resin with integrated micro-voids for stress concentration) is used to quickly adhere the copings to these cavities. This prioritizes speed over long-term mechanical integrity.
c. The denture with quickly adhered copings is pulled away from the implant abutments. The low-bond strength adhesive is designed to fracture readily, causing the caps to separate axially from the temporary fasteners with minimal effort.
d. The threaded portions of the temporary fasteners are unscrewed from the implant abutments.
e. Definitive screw clearance holes are quickly formed, potentially with less precision, using the coping bores as rough guides.
f. The denture is mounted to the implant abutments with definitive screws.
This method is intended for temporary stabilization or urgent functional restoration, accepting reduced longevity and requiring a planned follow-up for a more robust conversion.

graph TD
    A[Mount Copings with Temp Fasteners];
    B[Rapidly Create Oversized, Rough Cavities in Denture];
    C[Adhere Copings to Cavities (Sacrificial, Fast-Setting, Low-Bond Strength Adhesive)];
    D[Pull Denture (Caps Separate Easily due to Weak Adhesion)];
    E[Unscrew Temp Fastener Posts];
    F[Quickly Form Definitive Screw Clearance Holes (Less Precision)];
    G[Mount Denture with Definitive Screws];

    A --> B;
    B --> C;
    C --> D;
    D --> E;
    D --> F;
    E -- "Order Interchangeable" --> F;
    F --> G;

Combination Prior Art Scenarios with Open-Source Standards

US12156781 + DICOM (Digital Imaging and Communications in Medicine) Standard:
- Scenario: The digital capture of the converted prosthesis described in US12156781 (e.g., using scan flags, FIGS. 51-56) is directly integrated into a DICOM-compliant workflow. The 3D digital model generated from the scanned prosthesis (potentially augmented with patient-specific tissue data from CBCT scans) is stored and exchanged using DICOM standards. This ensures interoperability with various dental CAD/CAM software, patient management systems, and 3D printing platforms. The alignment data (implant coordinates, coping orientation) is embedded as structured data within DICOM metadata fields, allowing for seamless transfer and processing for the design and fabrication of definitive prostheses or duplicates.
US12156781 + G-code (RS-274D) Standard for Additive/Subtractive Manufacturing:
- Scenario: The process of forming definitive screw clearance holes (Claim 22, step e) and fabricating new custom prostheses (as implied by digital capture) is performed by computer-controlled machining (CNC milling or 3D printing). The AI-driven CAM software, mentioned in the patent description, directly generates G-code (an open-source standard for numerical control) to guide the robotic milling arms or 3D printers. The toolpaths for milling cavities in the denture (Claim 22, step b) or drilling definitive screw channels are precisely defined in G-code, ensuring accurate and repeatable manufacturing processes. This leverages existing open-source machine control languages for dental manufacturing.
US12156781 + Open-Source Biometric Authentication Protocols (e.g., FIDO2 with WebAuthn):
- Scenario: In the context of the IoT-enabled fastener (Derivative 1.4) or any system involving digital records, patient and clinician authentication for accessing or modifying digital models, treatment plans, or device parameters is secured using open-source biometric authentication protocols. For instance, a clinician using a tablet interface to approve a predictive release or review an AR-guided milling plan would authenticate using FIDO2/WebAuthn, potentially via a fingerprint or facial recognition scanner on their device. This standard ensures secure, phishing-resistant authentication for sensitive medical data and device control, protecting patient privacy and treatment integrity.