Universal Fibula Bone Harvesting Template with Adjustable Guides

Solution Overview

Problem

Existing templates for removing and placing fibula bone material in lower jaw reconstruction are not sufficiently precise and are costly, making them awkward to handle and time-consuming, especially when patient-specific templates are required.

Innovation Solution

A universal fibula bone material removal and placement template with adjustable bone cutting tool guide sections, a clip receiving device, and a positioning aid, designed to facilitate precise cuts and alignment, allowing for the use of mini-plates for transplant fixation, reducing the need for patient-specific templates and improving handling and precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If patient-specific templates are manufactured, then precision of bone material removal and placement is improved, but cost and manufacturing time increase significantly

Engineering Contradiction:

Improveprecision of bone material removal and placementVSAvoidcost and manufacturing time

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent employs a universal template design that can be applied to multiple patients and various resection patterns. The template includes adjustable components such as movable bone cutting tool guide sections and variable positioning aids that can be configured to match different anatomical variations, eliminating the need for patient-specific customization while maintaining high precision across diverse cases

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The template incorporates dynamic and adjustable elements including movable bone cutting tool guide sections that can be positioned at different locations, adjustable positioning aids that can be configured for various resection patterns, and removable components that allow flexibility in adaptation. This dynamic design enables a single universal template to accommodate multiple surgical scenarios without requiring manufacturing of new patient-specific templates

Inventive Principle:

Principle #15Dynamics

2Ease of manufacture

If universal templates are used, then cost and time are reduced, but precision and adaptability to individual patient anatomy decrease

Engineering Contradiction:

Improvecost and timeVSAvoidprecision and adaptability to individual patient anatomy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The template is divided into modular segments including a central body, movable bone cutting tool guide sections, and adjustable positioning aids that can be independently configured. This segmentation allows the universal template to be adapted to individual patient anatomy through selective positioning and configuration of its components, maintaining precision without requiring patient-specific manufacturing

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The template incorporates dynamic and adjustable elements including movable bone cutting tool guide sections that can be positioned at different locations, adjustable positioning aids that can be configured for various resection patterns, and removable components that allow flexibility in adaptation. This dynamic design enables a single universal template to accommodate multiple surgical scenarios without requiring manufacturing of new patient-specific templates

Inventive Principle:

Principle #15Dynamics

3Device complexity

If fixed bone cutting tool guide sections are used, then device complexity is reduced, but precision and flexibility in bone material removal decrease

Engineering Contradiction:

Improvedevice complexityVSAvoidprecision and flexibility in bone material removal

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The bone cutting tool guide sections are designed to be movable rather than fixed, allowing them to be positioned at different locations along the fibula and adjusted to match various resection patterns. The sections can be slid or rotated into position and fixed temporarily during the procedure, providing the precision and flexibility needed for accurate bone material removal while maintaining relatively simple device construction

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The template is divided into modular segments including a central body, movable bone cutting tool guide sections, and adjustable positioning aids that can be independently configured. This segmentation allows the universal template to be adapted to individual patient anatomy through selective positioning and configuration of its components, maintaining precision without requiring patient-specific manufacturing

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3451944B1Fibula bone material removal and transfer template

Publication Date: 2021.09.15 KARL LEIBINGER MEDIZINTECHNIK GMBH & CO KG

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AI summary

The invention relates to a fibula bone material removal and transfer template (1) comprising a center part (102) with a central body (115) each end (103) of which has a bone cutting tool guide portion (104), at least one of the bone cutting tool guide portions (104) being mounted such that it can be moved away from and pushed towards the center part (102).