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Revista Estomatológica Herediana
Print version ISSN 1019-4355
Abstract
SPOLJARIC MUNOZ, María Alejandra; PACHECO CAHUAS, María Daniela; CASTILLO ANDAMAYO, Esmeralda and QUINTANA DEL SOLAR, Martín Gilberto. Adaptation of Co-Cr copings made by induction casting and selective laser melting in CAD/CAM with clinical scanning. Rev. Estomatol. Herediana [online]. 2020, vol.30, n.3, pp.153-163. ISSN 1019-4355. http://dx.doi.org/10.20453/reh.v30i3.3818.
The technique of lost wax cast by induction centrifugation (CPCI) and selective laser fusion (SLM) in design and computer-aided manufacturing (CAD / CAM) with clinical scanning, are techniques for manufacturing cobalt-chromium copings (Co-Cr), have different production processes.
Objective:
To evaluate, in vitro, the marginal and internal adaptation of Co-Cr metal copings made on a chamfer termination line with the CPCI and SLM technique in CAD / CAM with clinical scanning.
Material and Methods:
A master model of Co-Cr premolar shape was made in CAD / CAM with chamfer termination line. With a clinical scanner, the master model was scanned and 13 Co-Cr copings manufactured in SLM were obtained. Impressions were taken to obtain models in type IV plaster where 13 Co-Cr copings with CPCI technique were manufactured. The marginal and internal adaptation was evaluated using the silicone replica technique, the samples were divided into segments: vestibulo-palatal and mesio-distal and were evaluated by stereo microscope.
Results:
The marginal and internal discrepancies were lower for the CPCI group compared to the SLM technique in CAD / CAM with clinical scanning. In addition, the results obtained for the marginal adaptation were less than 120 μm and the internal adaptation less than 350 μm for both techniques.
Conclusions:
The marginal and internal adaptation in the CPCI technique compared to SLM in CAD/CAM with clinical scan were better with statistically significant difference (p <0.05). In addition, the results obtained were within the clinically acceptable paramenters.
Keywords : Computer aided design; adaptation; solid state lasers; dental casting technique.
