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Radiographic inspection of porosity in pure titanium dumbbell castings
Author(s) -
Nuñez Juliana Maria Costa,
Takahashi Jessica Mie Ferreira Koyama,
Henriques Guilherme Elias Pessanha,
Nóbilo Mauro Antônio de Arruda,
Consani Rafael Leonardo Xediek,
Mesquita Marcelo Ferraz
Publication year - 2011
Publication title -
gerodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 54
eISSN - 1741-2358
pISSN - 0734-0664
DOI - 10.1111/j.1741-2358.2010.00376.x
Subject(s) - radiography , medicine , casting , porosity , titanium , rod , implant , materials science , composite material , metallurgy , radiology , surgery , alternative medicine , pathology
Radiographic inspection of porosity in pure titanium dumbbell castingsBackground: Titanium frameworks are frequently indicated for implant supported prostheses; however, voids are usually encountered inside cast titanium. Objective: This study aimed to confirm the efficacy of a radiographic technique for inspection of porosity in commercially pure titanium castings with different diameter. Materials and methods: Sixty dumbbell rods ( n = 20) with a central 1.5, 2.0 and 3.5 mm diameter were prepared by lost‐wax casting. Cast specimens were finished and polished and submitted to radiographic examination (90 kV, 15 mA, 0.6 s and 10–13 mm of distance) using periapical film. The radiographs were visually analysed for the presence of porosity in the extension of the dumbbell or in the central portion of the rods. Data were submitted to Pearson Chi‐square test (5%). Results: The tested radiographic method proved to be suitable for the evaluation of cast frameworks. Internal porosities were observed in most of the specimens (91.7%) ( p = 0.0005); however, only 20% occurred on the central portion of the rods ( p = 0.612). Conclusion: Internal porosities can be visualised through radiographs and occur mostly in small diameter structures. The radiographic evaluation of metal structures can improve the quality of frameworks and thereby potentially increase the longevity of the rehabilitation.