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. 2024 Sep;87(9):2186-2193.
doi: 10.1002/jemt.24595. Epub 2024 May 7.

CAD-CAM and heat-press: Comparison of internal and marginal fit of lithium disilicate copings

Marcia Bella  1 , Leonardo Lins  1 , Antonio Canabarro  1   2
Affiliations

CAD-CAM and heat-press: Comparison of internal and marginal fit of lithium disilicate copings

Marcia Bella et al. Microsc Res Tech. 2024 Sep.

Abstract

The aim of this in vitro study is to compare the performance of digital and conventional methods in the manufacture of single copings in terms of the internal and marginal fit. Twenty-four prefabricated titanium Cone Morse Exact abutments of the lateral anatomical type were used to manufacture 24 lithium disilicate copings in the CAD-CAM Ceramill (n = 12) and heat-press (n = 12) systems. The copings were cemented using a self-adhesive resin cement (RelyX U-200; 3M ESPE) and then cut vertically. The cement line was photographed using an optical microscope at ×100 and ×200 magnification and then the internal and marginal regions were measured. The mean values of fits, for the CAD-CAM and heat-press techniques, respectively, were (μm): angular regions, 81.8 and 75.3; linear regions, 63.1 and 60.1; incisal regions, 171.1 and 114.7; marginal discrepancy, 74.1 and 75.2; and absolute marginal discrepancy, 99.5 and 96.2. MANOVA test showed that there is an effect of the techniques on the regions (p < .05). The effects of laboratories and the interaction between laboratories and techniques on the regions were not statistically significant (p > .05). The techniques evaluated presented clinically acceptable results for the marginal fit. However, the conventional method performed better for the internal fit. RESEARCH HIGHLIGHTS: Scientific evidence regarding the methods of making prosthesis can help the dental professional in decision-making. Digital and conventional methods is both good in the manufacture of single copings in terms of the internal and marginal fit.

Keywords: CAD‐CAM; dental implants; prosthesis adjustment.

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References

REFERENCES

    1. Abduo, J., Lyons, K., & Swain, M. (2010). Fit of zirconia fixed partial denture: A systematic review. Journal of Oral Rehabilitation, 37, 866–876.
    1. Al Hamad, K. Q., Al Rashdan, B. A., Al Omari, W. M., & Baba, N. Z. (2019). Comparison of the ft of lithium disilicate crowns made from conventional, digital, or conventional/digital techniques. Journal of Prosthodontics, 28, e580–e586.
    1. Alajaji, N. K., Bardwell, D., Finkelman, M., & Ali, A. (2017). Micro‐CT evaluation of ceramic inlays: Comparison of the marginal and internal fit of five and three axis CAM systems with a heat press technique. Journal of Esthetic and Restorative Dentistry, 29, 49–58.
    1. Anadioti, E., Aquilino, S. A., Gratton, D. G., Holloway, J. A., Denry, I., Thomas, G. W., & Qian, F. (2014). 3D and 2D marginal fit of pressed and CAD/CAM lithium disilicate crowns made from digital and conventional impressions. Journal of Prosthodontics, 23, 610–617.
    1. Boitelle, P., Mawussi, B., Tapie, L., & Fromentin, O. (2014). A systematic review of CAD/CAM fit restoration evaluations. Journal of Oral Rehabilitation, 41, 853–874.

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