The Effect of Laser and Conventional Soldering on the Tensile Strength of Co-Cr Frameworks Fabricated by Different Methods

Abstract

Background: This study aimed to evaluate the tensile strength of cobalt-chromium (Co-Cr) frameworks produced using different manufacturing methods (conventional casting, laser sintering, and computer-aided design and manufacturing [CAD/CAM]) and their performance after conventional and laser soldering.

Methods: Co-Cr specimens were fabricated using conventional casting, laser sintering, and CAD/ CAM. Each group included 24 specimens, divided into 3 subgroups: unsoldered control, conventional soldering, and laser soldering. Tensile strength tests were conducted using a universal testing machine, and the data were analyzed using one-way ANOVA and Tukey’s post-hoc tests.

Results: Laser sintering produced the highest tensile strength in unsoldered specimens, followed by CAD/CAM and conventional casting. Conventional soldering reduced tensile strength in all groups, with the most significant decrease observed in the laser sintering group. Laser soldering improved tensile strength in conventional casting but reduced it in laser-sintered and CAD/CAM  specimens.

Conclusion: The tensile strength of Co-Cr frameworks is significantly influenced by both manufacturing and soldering techniques. Laser sintering provides the strongest unsoldered specimens, while laser soldering is preferable to conventional soldering for preserving tensile strength.

Cite this article as: Domaniç KY. The effect of laser and conventional soldering on the tensile strength of co-cr frameworks fabricated by different methods. Essent Dent. 2026, 5, 0017, doi:10.5152/EssentDent.2026.25017.