R Zakaria M, H Jassim H. Evaluation of the effects of porcelain firing cycles on the marginal fit changes of porcelain– fused–to–metal crowns constructed utilizing two different marginal designs and alloys. Al-Rafidain Dent J [Internet]. 2003 Jan. 1 [cited 2026 Jan. 12];3(1):13-20. Available from: https://rden.uomosul.edu.iq/index.php/rden/article/view/35467