Tissue Management Impression Material for Cordless Dental Retraction
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Solution Overview
Problem
Current methods for taking dental impressions often result in inadequate tissue retraction and hemorrhaging due to the use of retraction cords or clay-based pastes, which are painful and ineffective in maintaining space between the tissue and tooth, leading to unsatisfactory impressions.
Innovation Solution
An air-powered pneumatic dispenser is used to precisely place a tissue management impression material into the sulcus, which becomes part of the final impression, eliminating the need for retraction cords and allowing for self-curing to provide temporary retraction for a cordless impression technique.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If retraction cords or clay-based pastes are used for tissue retraction, then space between tissue and tooth is maintained, but patient discomfort and hemorrhaging increase
Solution Approach 1:
The invention removes the harmful retraction cord from the system entirely, replacing it with a clay-based paste that achieves tissue retraction without the mechanical trauma and discomfort associated with cord insertion. The paste is applied directly to the tooth surface and allows gingival tissue to retract naturally without foreign object interference.
Solution Approach 2:
The invention changes the physical state and properties of the retraction medium from a solid cord that mechanically displaces tissue to a moldable clay-based paste that chemically and physically interacts with tissue to achieve gentle retraction. The paste's viscosity, moldability, and astringent properties are optimized to maintain space while minimizing harm.
2Length of stationary object
If retraction cords are used to maintain space, then impression space is secured, but tissue trauma and pain increase
Solution Approach 1:
The harmful retraction cord is completely removed from the procedure. Instead, a moldable clay-based paste is applied to the prepared tooth surface, which allows gingival tissue to retract naturally around the tooth without mechanical displacement, thereby securing impression space without causing trauma or pain.
Solution Approach 2:
The clay-based paste serves as a gentle intermediary substance between the tooth and the retracting gingival tissue. It provides a buffer that allows tissue to move naturally while maintaining the necessary space, avoiding the direct mechanical trauma caused by cord insertion.
3Length of stationary object
If clay-based pastes are used for retraction, then space is maintained, but tear strength and wettability of impression material are reduced
Solution Approach 1:
The invention optimizes the clay-based paste's physical and chemical parameters, including viscosity, particle size distribution, and astringent compound concentration, to achieve effective tissue retraction while maintaining compatibility with impression materials. The paste is formulated to provide adequate space maintenance without compromising the tear strength or wettability of the subsequent impression material application.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for accurate recording of dental anatomy with improved tear strength and wetting ability, reducing patient discomfort and achieving better impression quality by maintaining space without causing hemorrhaging.
Implementation Method 1
vinylsiloxane impression material compositions which have improved tear strength and wettability, particularly for use in making dental impressions
Implementation Method 2
controlling any bleeding in the gingival sulcus area, and utilizing a dental dam preferably formed out of a sponge or foam like material to contain an astringent fortified silicone impression material
Implementation Method 3
utilizing a dental dam preferably formed out of a sponge or foam like material to contain an astringent fortified silicone impression material
Implementation Method 4
using the patient's biting force to apply the necessary pressure onto the dam until the silicone impression material sets and adheres to the dam
Data Source
AI summary
Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown.