Shenoy Amrutha, Ahmed Nabeel, Rajaraman Vaishnavi, Maiti Subhabrata, Ganapathy Dhanraj M
Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India.
J Adv Pharm Technol Res. 2022 Dec;13(Suppl 2):S442-S446. doi: 10.4103/japtr.japtr_307_22. Epub 2022 Dec 30.
Long span base metal alloy fixed prosthesis and partial dental prosthesis frameworks most often require welding for better fit and adaptation. The type of metal alloys used and its effect on the weld strength of the prosthesis have to be investigated. The aim of the study is to comparatively analyze the weld strength of nickel-chromium (Ni-Cr) and cobalt-chromium (Co-Cr) base metal alloys when subjected to tungsten inert gas (TIG) welding. 10 nickel- and cobalt-based specimens were obtained by casting of castable resin patterns of dimension 25 mm × 3 mm × 1 mm. Welding of the samples was carried out using the Lampert PuK 2 welding equipment, and a three-point bend test using a universal testing machine was carried out to evaluate the weld strength of the specimens. Statistical analysis was carried out using the SPSS software version 23. Higher weld strength was observed in the Co-Cr alloy (mean = 898 MPa) than in the Ni-Cr alloy (mean = 690 MPa), when submitted to TIG welding ( < 0.05). TIG welding could be a better alternative for joining base metal alloys for long span edentulous cases, and cobalt-based alloys could be better alternatives to nickel-based alloys that usually tend to cause hypersensitivity reactions.
大跨度贱金属合金固定修复体和局部义齿支架通常需要焊接以获得更好的贴合度和适应性。必须研究所用金属合金的类型及其对修复体焊接强度的影响。本研究的目的是比较分析镍铬（Ni-Cr）和钴铬（Co-Cr）贱金属合金在进行钨极惰性气体（TIG）焊接时的焊接强度。通过铸造尺寸为25mm×3mm×1mm的可铸树脂模型获得10个镍基和钴基试样。使用兰珀特PuK 2焊接设备对样品进行焊接，并使用万能试验机进行三点弯曲试验以评估试样的焊接强度。使用SPSS 23版软件进行统计分析。在进行TIG焊接时，观察到Co-Cr合金（平均值 = 898MPa）的焊接强度高于Ni-Cr合金（平均值 = 690MPa）（P<0.05）。对于大跨度无牙颌病例，TIG焊接可能是连接贱金属合金的更好选择，并且钴基合金可能是通常容易引起过敏反应的镍基合金的更好替代品。
