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Published on: December 20, 2024
Failure modes with point loading of three commercially available denture teeth.
Andrew R Moffitt1, Ronald D Woody, Stephen M Parel
1Private Practice, Moffitt Restorative Dentistry, Champlin, MN 55316, USA. drmoffitt@moffittrestorativedentistry.com
Summary
This study compared the fracture resistance of three denture teeth under off-axis compressive load. The Ivoclar denture teeth demonstrated superior strength, indicating good durability for implant-supported prostheses.
Area of Science:
- Biomaterials Science
- Dental Materials
- Prosthodontics
Background:
- Denture tooth fracture is a common complication with implant-supported prostheses.
- Understanding fracture modes is crucial for improving prosthesis longevity.
Purpose of the Study:
- To compare the fracture modes and ultimate failure strength of three different denture teeth under off-axis compressive loading.
- To evaluate the influence of two processing methods (injection-molded and compression-molded) on denture tooth fracture resistance.
Main Methods:
- Three denture teeth (Vident Duostat, Ivoclar Vivadent, Dentsply Trubyte) were processed using injection-molded (IM) and compression-molded (CM) techniques.
- Specimens were mounted on metal frameworks and subjected to point loading at a 30-degree off-axis angle.
- Ultimate failure strength was recorded, and fracture modes were visually inspected.
Main Results:
- Significant differences in fracture load were observed between groups, with Ivoclar CM showing the highest average load (1616.98 N) and Dentsply IM the lowest (1023.80 N).
- All tested denture teeth, on average, fractured at forces exceeding the maximum occlusal force in natural dentition.
- Fracture patterns varied, with Dentsply and Vident teeth fracturing more horizontally and Ivoclar teeth more vertically.
Conclusions:
- The tested denture teeth exhibit sufficient strength to withstand typical occlusal forces when subjected to 30-degree off-axis loading.
- Processing methods (IM vs. CM) did not significantly impact the fracture resistance of the evaluated denture teeth.
- These findings support the clinical use of these denture teeth in implant-supported prostheses, suggesting good durability.
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