Accuracy of Ringless Casting and Accelerated Wax-Elimination Technique: A Comparative In Vitro Study
- Resource Type
- Authors
- Rahul Prasad; Shreenivas Vasant Bhide; Paresh Gandhi; Abdulaziz Abdullah Al-Keraif; Nidhi Kathuria
- Source
- Journal of Prosthodontics. 23:157-162
- Subject
- Wax
business.product_category
Materials science
Metallurgy
Fixed prosthodontics
Magnification
Casting
visual_art
visual_art.visual_art_medium
In vitro study
Die (manufacturing)
Composite material
business
General Dentistry
Conventional technique
- Language
- ISSN
- 1059-941X
Purpose The purpose of this study was to determine whether the ringless casting and accelerated wax-elimination techniques can be combined to offer a cost-effective, clinically acceptable, and time-saving alternative for fabricating single unit castings in fixed prosthodontics. Materials and Methods Sixty standardized wax copings were fabricated on a type IV stone replica of a stainless steel die. The wax patterns were divided into four groups. The first group was cast using the ringless investment technique and conventional wax-elimination method; the second group was cast using the ringless investment technique and accelerated wax-elimination method; the third group was cast using the conventional metal ring investment technique and conventional wax-elimination method; the fourth group was cast using the metal ring investment technique and accelerated wax-elimination method. The vertical marginal gap was measured at four sites per specimen, using a digital optical microscope at 100× magnification. The results were analyzed using two-way ANOVA to determine statistical significance. Results The vertical marginal gaps of castings fabricated using the ringless technique (76.98 ± 7.59 μm) were significantly less (p 0.05). Conclusions The ringless investment technique can produce castings with higher accuracy and can be favorably combined with the accelerated wax-elimination method as a vital alternative to the time-consuming conventional technique of casting restorations in fixed prosthodontics.