Surgical Template Repositioning via Temporary Anchoring Implants
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Solution Overview
Problem
Current methods for cranial surgical procedures, such as dental restorative procedures in edentulous subjects with bone resorption, face challenges in accurately positioning surgical templates due to lack of stable anatomical structures, leading to inaccuracies and the need for extensive manual adaptation, which is not feasible for critical applications like zygoma implants.
Innovation Solution
A computer-implemented method and system for virtually planning cranial drilled implant guided surgery, generating data sets from reference and master structures to produce surgical templates with precise positioning, using temporary anchoring implants or screws to lock the template in place, ensuring high accuracy and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional model-based production of surgical templates is used, then manual adaptation is required, but accuracy is lost due to error chain from impression material shrinkage and casting material shrinkage
Solution Approach 1:
The patent uses optical scanning to create a digital copy of the patient's anatomy and the reference structure, eliminating the need for physical impressions and casts. The surgical template is then manufactured using additive manufacturing based on this digital model, preserving accuracy without the error chain inherent in conventional copying methods involving impression materials and casting materials.
Solution Approach 2:
The patent replaces the mechanical impression-taking and casting process with optical scanning and digital modeling. This substitution eliminates the physical contact and material shrinkage issues, providing a non-contact method to capture geometry and generate production data for the surgical template.
2Manufacturing precision
If surgical template is positioned directly on mucosa in edentulous subjects, then positioning is attempted, but stable position cannot be achieved due to bone resorption and lack of anatomical structures
Solution Approach 1:
The patent introduces temporary anchoring implants that are inserted into the bone structure before the surgical procedure. These anchors provide predetermined, stable reference points that allow the surgical template to be securely positioned during the actual surgery, overcoming the problem of unstable mucosal positioning in edentulous subjects with bone resorption.
Solution Approach 2:
The patent uses temporary anchoring implants as intermediary elements between the bone structure and the surgical template. These anchors serve as mediators that provide stable attachment points, enabling accurate and reliable template positioning even when direct mucosal positioning would be unstable due to anatomical changes from bone resorption.
3Adaptability or versatility
If mass customization of surgical templates is attempted using conventional methods, then each template requires manual adaptation, but this is not feasible for critical applications due to time and accuracy constraints
Solution Approach 1:
The patent uses optical scanning to rapidly create digital models of patient anatomy and reference structures, enabling quick customization without manual intervention. The digital models are processed through automated algorithms to generate production data for additive manufacturing, allowing mass customization to be achieved efficiently and accurately for critical applications.
Solution Approach 2:
The patent employs additive manufacturing technology that allows surgical templates to be customized by changing digital parameters rather than requiring physical manual adaptation. The production data generated from optical scanning and virtual planning can be directly used to manufacture customized templates with precise geometric features, enabling rapid adaptation to different patient needs without time-consuming manual processes.
Data Source
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AI summary
A method of virtually planning a cranial drilled implant guided surgery in a subject is disclosed. The method comprises generating (100) a first data set based on input data obtained from a reference structure having a defined relation to a bone structure of said subject, generating (110) a second data set based on input data obtained from a master structure for a surgical template, said master structure having a defined relation to said reference structure, and associating (120) said first data set with said second data set such that said relation of said reference structure to said master structure is preserved whereby a third data set for production of said surgical template is provided. In this manner a repositioning of the surgical template to a previous position of the master structure in a patient is obtained.