Visual Evaluation of Cast Dental Alloys Welds Discontinuities in the Field of Fixed Prosthodontics
It is essential for a weld to satisfy the requirements of certain standards in the field where it is applied. The aim of the study was to highlight the discontinuities which can appear in the joints achieved by laser and microplasma welding of base metal dental alloys used in fixed prosthodontics. All types of discontinuities which are visible from visual inspection were searched: inclusions, inadequate joint penetration, incomplete fusion, undercuts, overlaps, underfills. Recognizing the defects and discontinuities and their delimitation was essential in determining the weld quality. The obtained results were satisfactory for the purpose both for microplasma and laser welding. Using these methods, welds without defects, which meet minimum acceptable standards for each case, could be obtained.
S. Porojan et al., "Visual Evaluation of Cast Dental Alloys Welds Discontinuities in the Field of Fixed Prosthodontics", Advanced Materials Research, Vols. 383-390, pp. 4058-4064, 2012