Temporary Dental Prosthesis Wear Resistance via Composite Resin Layering
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Solution Overview
Problem
Conventional temporary dental prostheses made with room temperature polymerization resin are prone to wear and damage due to low strength, especially when exposed to occlusion pressure and consumption of tough foods, necessitating a stronger alternative for extended use periods.
Innovation Solution
A method involving the use of a dental composite resin with a higher strength, comprising a (meth)acrylate compound, photopolymerization initiator, and a filler ratio of 45 wt % to 80 wt %, combined with a powder-liquid type room temperature polymerization resin having a filler ratio of less than or equal to 10 wt %, to fabricate a temporary prosthesis that is less susceptible to wear and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional room temperature polymerization resin is used to fabricate temporary prosthesis, then the fabrication process is simple and can be performed at dental clinics, but the prosthesis has low strength and is prone to wear and damage
Solution Approach 1:
The patent applies composite materials by combining dental composite resin (photopolymerization type) with room temperature polymerization resin. The dental composite resin contains inorganic fillers (45-80 wt%) that significantly enhance strength and wear resistance, while the room temperature polymerization resin provides ease of fabrication. This composite approach allows the prosthesis to maintain both high strength and simple fabrication processes.
2Strength
If dental composite resin with high filler ratio is used, then the prosthesis strength and wear resistance are improved, but the fabrication process becomes more complex
Solution Approach 1:
The patent segments the prosthesis fabrication into two distinct stages: first applying dental composite resin to the occlusal surface area that requires high strength and wear resistance, then filling the remaining portions with room temperature polymerization resin. This segmentation allows the high-filler dental composite resin to be used only where necessary (occlusal surface), reducing overall complexity while maintaining strength where needed.
Solution Approach 2:
The patent applies local quality by using dental composite resin specifically for the occlusal surface portion of the prosthesis, where high strength and wear resistance are most critical for withstanding chewing forces. The remaining portions of the prosthesis use the simpler room temperature polymerization resin. This localized application of high-performance material optimizes strength where needed without unnecessarily complicating the overall fabrication process.
3Duration of action of moving object
If temporary prosthesis is used for extended periods (up to several months), then the patient's schedule flexibility is improved, but the prosthesis becomes more susceptible to wear and occlusal problems
Solution Approach 1:
The patent uses composite materials with high inorganic filler content (45-80 wt%) in the dental composite resin to significantly enhance wear resistance and strength. This allows the temporary prosthesis to maintain its structural integrity and reliability over extended usage periods of several months, preventing occlusal problems and damage that would normally occur with conventional low-filler resins used for the same duration.
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
The method enables the production of a temporary prosthesis that is easier to fabricate at a dental clinic and provides enhanced resistance to wear and damage, maintaining occlusal function and aesthetics for extended periods.
Implementation Method 1
a photopolymerization initiator, and a filler; and a ratio of the filler is 45 wt % to 80 wt % of the dental composite resin material
Implementation Method 2
a powder-liquid mixture of a powder-liquid type room temperature polymerization resin having a filler ratio of less than or equal to 10 wt %
Data Source
AI summary
Provided is a method for producing a temporary prosthesis that can be easily performed at a dental clinic and that at the same time enables fabrication of a temporary prosthesis that is less susceptible to wear and damage. The present invention is achieved by fabricating an occlusal surface with a dental composite resin that has higher strength compared to a conventional room temperature polymerization resin. The method includes fabricating a prosthesis model, using an impression material to take an impression of a prepared tooth model having the prosthesis model mounted thereon, applying a layer of dental composite resin material to a portion that is to become a crown within the impression that has been removed from the prepared tooth model and polymerizing the composite resin material, putting a powder-liquid mixture of a powder-liquid type room temperature polymerization resin into the impression, refitting the prepared tooth model to the impression, and curing the room temperature polymerization resin.