Adjustable Maxillomandibular Registration Tray for One-Visit Dentures
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Solution Overview
Problem
Conventional denture fabrication processes for edentulous patients are time-consuming and require multiple dental visits due to challenges in accurately recording the maxillomandibular relationship, particularly when adjusting the vertical dimension and horizontal jaw relationship using Gothic arch tracing devices.
Innovation Solution
A maxillomandibular registration tray with adjustable maxillary and mandibular portions that allow simultaneous application of impression material, followed by separation and precise adjustment of the vertical distance using screws, enabling efficient and precise intermaxillary relationship registration in a single patient visit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional multi-step process with custom trays and wax rims is used, then accurate maxillomandibular registration can be achieved, but the number of dental visits and treatment time increase significantly
Solution Approach 1:
The patent combines multiple functions (impression taking, maxillomandibular relationship recording, and vertical dimension determination) into a single registration tray that can be used in one visit, eliminating the need for separate custom trays and wax rim procedures while maintaining registration accuracy
Solution Approach 2:
The registration tray serves multiple purposes simultaneously: it acts as an impression tray, a record base, and a tool for determining vertical dimension and centric relation, replacing several specialized devices used in the conventional multi-visit process
2Loss of time
If a single tray with simultaneous material application is used, then the number of visits is reduced, but it becomes difficult to adjust vertical dimension and control interocclusal registration space
Solution Approach 1:
The tray incorporates adjustable components including screws and movable elements that allow the vertical dimension and interocclusal space to be modified after the initial impression is taken, providing dynamic adjustment capability within a single-visit framework
Solution Approach 2:
The registration tray is divided into separable components including maxillary and mandibular portions that can be adjusted independently, allowing precise control of vertical dimension and interocclusal clearance while maintaining the benefit of a single-tray design
3Loss of time
If Gothic arch tracing is recorded on the day of impression taking, then the number of visits is reduced, but the process becomes time-consuming and difficult to adjust
Solution Approach 1:
The tray is pre-configured with Gothic arch tracing mechanisms and adjustment components in place before the patient visit, allowing the clinician to proceed directly with recording and adjusting without time-consuming fabrication steps during the appointment
Data Source
AI summary
A maxillomandibular registration tray of the present invention includes a maxillary portion that can be fixed by adding material to the maxillary portion of a patient, a mandibular portion that can be fixed by adding material to the mandibular portion of a patient, and connecting portions that connect the inner surface of the maxillary portion and the inner surface of the mandibular portion to each other. The distance between the maxillary portion and mandibular portion is adjustable after separating the maxillary portion and mandibular portion. Therefore, the maxillomandibular registration tray first applies materials to the maxillary portion and mandibular portion to acquire maxillomandibular registration, and then separates the maxillary portion and mandibular portion to adjust the distance using screws to set the vertical height, establish the mandibular position, and add bite registration materials to the maxillary and mandibular tray space to finally acquire precise maxillomandibular registration.