Preparation Guide Plate for Aligned Implant and Denture Insertion

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Solution Overview

Problem

Existing methods for fabricating removable partial dentures result in inconsistencies between the insertion path direction and implant placement direction, leading to poor retention and increased bone resorption due to lateral forces on implants.

Innovation Solution

A method for constructing a preparation guide plate model involving CBCT data simulation, oral scan data processing, and 3D printing to ensure consistent implant placement and insertion path direction, using a preparation guide plate model with guide planes tangent to adjacent teeth and consistent implant reserve holes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a manual simple guide plate is used for implant placement, then the fabrication process is simple and cost-effective, but the precision of implant placement direction and guide plane preparation is insufficient, leading to inconsistency between insertion path and implant placement direction

Engineering Contradiction:

Improveprecision of implant placement direction and guide plane preparationVSAvoidcomplexity of guide plate fabrication process

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent performs preliminary digital simulation and planning before actual surgery. CBCT data is processed to simulate implant placement, and a digital guide plate is designed in advance with precise insertion path directions. This preliminary digital preparation ensures that the guide plane preparation and implant placement directions are consistent, avoiding the need for manual trial-and-error adjustments during surgery.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual mechanical guide plate fabrication with digital design and 3D printing technology. Instead of manually carving a simple guide plate, the system uses CBCT data processing, digital modeling software, and 3D printing to create a precise guide plate. This substitution of mechanical manual work with digital processes significantly improves precision while maintaining relative simplicity through automated fabrication.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If the insertion path direction is not consistent with implant placement direction, then the fabrication process is faster and simpler, but the removable denture experiences serious wear on the base surface and the implant is subjected to large lateral forces causing bone resorption

Engineering Contradiction:

Improveretention effect of removable denture and prevention of bone resorptionVSAvoidalignment between insertion path and implant placement direction

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent incorporates feedback mechanisms through digital simulation and virtual verification. Before fabrication, the digital guide plate design is verified to ensure the insertion path direction matches the simulated implant placement direction. This digital feedback loop allows for adjustment and optimization before actual manufacturing, ensuring that the final guide plate and denture achieve proper alignment, preventing wear and lateral forces on implants.

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If a digital-designed/fabricated guide plate is used, then the precision of guide plane preparation is improved, but the cost and fabrication time increase

Engineering Contradiction:

Improveprecision of guide plane preparationVSAvoidfabrication time and cost

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent creates a digital copy of the patient's oral cavity anatomy using CBCT data and oral scan data. This digital model serves as a virtual replica that can be processed, simulated, and used for design without requiring physical trial models. The digital guide plate is then fabricated using 3D printing technology, which, while requiring initial digital processing time, eliminates the need for multiple physical iterations and manual adjustments, ultimately improving productivity through streamlined fabrication.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12521205B2Preparation guide plate and removable partial denture support model construction method and fabrication method

Publication Date: 2026.01.13 FOURTH MILITARY MEDICAL UNIVERSITY

AI summary

The present disclosure discloses a method for constructing and fabricating a preparation guide plate and a removable partial denture bracket model. The method includes: simulating implant placement in CBCT data of an oral cavity, and determining an implant placement site and an implant placement direction; in oral scan data, generating a simulated implant and marking a direction of an insertion path for a removable partial denture, the direction of the insertion path being consistent with the implant placement direction; marking a guide plane of an inner side of an adjacent tooth at an inner side of an adjacent tooth of the oral scan data based on the direction of the insertion path; and generating the preparation guide plate model based on an edentulous region, the adjacent tooth, and the guide plane of the inner side of the adjacent tooth in the oral scan data and a region to be removed.