Cost analysis of casting techniques.

The aim of this study was to compare the compressive strength, microstructural characteristics, and cost-effectiveness of cast dental posts fabricated using two techniques: torch casting (TC) and electric arc casting (EAC), both integral to the lost wax method. Employing an applied research approach with an experimental design, the study analyzed 40 non-precious gold (NPG) alloy cast posts, divided equally into two groups of 20 for each technique. The selection process was non-probabilistic and based on convenience, with specific inclusion and exclusion criteria to ensure precision and relevance. The results reveal a significant advantage for the EAC technique. In Essay 1, EAC posts exhibited a mean compressive strength of 206.102 MPa, compared to 157.207 MPa for TC posts. Similarly, in Essay 2, EAC posts showed a mean strength of 172.625 MPa versus 136.303 MPa for TC posts. These differences were statistically significant (p

本研究旨在对比两种失蜡法（lost wax method）核心制备工艺——火焰铸造（torch casting, TC）与电弧铸造（electric arc casting, EAC）所制铸造牙科桩的抗压强度、微观结构特征与成本效益。本研究采用应用研究路径与实验设计方案，对40件非贵金属金（non-precious gold, NPG）合金铸造桩开展分析，将其均分为两组，每组20件分别对应两种铸造工艺。样本选取采用非概率便利抽样法，并设置明确的纳入与排除标准以保障研究的精准性与相关性。研究结果显示电弧铸造工艺具备显著优势：在试验1中，电弧铸造桩的平均抗压强度为206.102 MPa，火焰铸造桩则为157.207 MPa；同理，试验2中电弧铸造桩的平均抗压强度达172.625 MPa，火焰铸造桩仅为136.303 MPa。上述差异均具有统计学显著性（p