Patient-Specific Mandibular Reconstruction Guide for Graft Alignment
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Solution Overview
Problem
Current mandibular reconstruction systems are complicated, involve long recovery times, and often require delayed dental reconstruction, with existing devices not being patient-specific and causing soft tissue irritation.
Innovation Solution
A patient-specific cutting and alignment guide system using a triangular plate and fibular grafts, allowing for precise cutting and alignment of bone grafts, concurrent dental implant installation, and reduced soft tissue irritation through recessed screws and plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional mandibular reconstruction systems are used, then the reconstruction can be performed, but the recovery time is long and dental reconstruction must be delayed
Solution Approach 1:
The cutting guide is divided into multiple sections (first section, second section, third section) that can be independently configured to engage different bone graft sections. This segmentation allows for precise control of each bone segment while enabling concurrent dental implant placement, thereby reducing overall recovery time without requiring overly complex integrated systems.
Solution Approach 2:
The cutting guide is designed with predetermined cutting surfaces and alignment features that are prepared in advance based on patient-specific anatomy. The guide includes pre-configured drill guides for dental implants and screw holes for fixation, allowing all necessary actions to be performed in a single surgical stage, eliminating the need for delayed dental reconstruction.
2Reliability
If traditional plates and screws are used for fixation, then the bone grafts can be secured, but soft tissue irritation occurs
Solution Approach 1:
The cutting guide and fixation system are designed with patient-specific anatomical contours that match the individual's bone geometry and soft tissue profile. The guide includes customized engagement surfaces for bone grafts and positioning features that ensure optimal placement, providing reliable fixation while minimizing protrusion into soft tissue and reducing irritation.
3Manufacturing precision
If patient-specific cutting guides are used, then precise cutting and alignment can be achieved, but the device complexity increases
Solution Approach 1:
The cutting guide is designed as a multi-functional device that combines bone cutting guidance, alignment fixation, dental implant positioning, and screw hole preparation into a single integrated system. The guide can be configured with multiple sections to engage different bone graft segments while simultaneously providing drill guides for implants and templates for screw placement, achieving high precision without requiring multiple separate complex devices.
Data Source
AI summary
Systems and methods for mandibular reconstruction are provided. An example system may comprise a drilling guide comprising: (1) a body configured to register against two adjacent surfaces of a native mandible when the body is temporarily secured to the native mandible; and (2) a tube extending from the body. The tube may be configured to constrain orientation of a drill bit when inserted through the tube and into the native mandible to reduce off-axis tilt of the drill bit when forming a void in the native mandible. Size and orientation of the void may correspond with size and orientation of a phalange of a neo-mandible assembly to be received within the void.