Year : 2013 | Volume
: 24 | Issue : 1 | Page : 147--148
Evaluation of marginal gap of Ni-Cr copings made with conventional and accelerated casting techniques
Pavan Kumar Tannamala1, Nagarasampatti Sivaprakasam Azhagarasan2, K Chitra Shankar2
1 Department of Prosthodontics, Narayana Dental College, Nellore, Andhra Pradesh, India
2 Department of Prosthodontics, Ragas Dental College and Hospital, Chennai, Tamil Nadu, India
Context: Conventional casting techniques following the manufacturers�SQ� recommendations are time consuming. Accelerated casting techniques have been reported, but their accuracy with base metal alloys has not been adequately studied.
Aim: We measured the vertical marginal gap of nickel-chromium copings made by conventional and accelerated casting techniques and determined the clinical acceptability of the cast copings in this study.
Settings and Design: Experimental design, in vitro study, lab settings.
Materials and Methods: Ten copings each were cast by conventional and accelerated casting techniques. All copings were identical, only their mold preparation schedules differed. Microscopic measurements were recorded at ×80 magnification on the perpendicular to the axial wall at four predetermined sites. The marginal gap values were evaluated by paired t test.
Results: The mean marginal gap by conventional technique (34.02 μm) is approximately 10 μm lesser than that of accelerated casting technique (44.62 μm). As the P value is less than 0.0001, there is highly significant difference between the two techniques with regard to vertical marginal gap.
Conclusion: The accelerated casting technique is time saving and the marginal gap measured was within the clinically acceptable limits and could be an alternative to time-consuming conventional techniques.
Pavan Kumar Tannamala
Department of Prosthodontics, Narayana Dental College, Nellore, Andhra Pradesh
|How to cite this article:|
Tannamala PK, Azhagarasan NS, Shankar K C. Evaluation of marginal gap of Ni-Cr copings made with conventional and accelerated casting techniques.Indian J Dent Res 2013;24:147-148
|How to cite this URL:|
Tannamala PK, Azhagarasan NS, Shankar K C. Evaluation of marginal gap of Ni-Cr copings made with conventional and accelerated casting techniques. Indian J Dent Res [serial online] 2013 [cited 2023 May 31 ];24:147-148
Available from: https://www.ijdr.in/article.asp?issn=0970-9290;year=2013;volume=24;issue=1;spage=147;epage=148;aulast=Tannamala;type=0