Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material
The aim of this study was to compare the mechanical strength of different joints made by conventional brazing, TIG and laser welding with and without filling material. Five standardized joining configurations of orthodontic wire in spring hard quality were used: round, cross, 3 mm length, 9 mm lengt...
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University of São Paulo
2008-10-01
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doaj-86fc2b5a7ee248728c09ec4495e6cb462020-11-25T01:37:48ZengUniversity of São PauloJournal of Applied Oral Science1678-77571678-77652008-10-0116532833510.1590/S1678-77572008000500005Fracture strength of different soldered and welded orthodontic joining configurations with and without filling materialJens Johannes BockJacqueline BaillyChristian Ralf GernhardtRobert Andreas Werner FuhrmannThe aim of this study was to compare the mechanical strength of different joints made by conventional brazing, TIG and laser welding with and without filling material. Five standardized joining configurations of orthodontic wire in spring hard quality were used: round, cross, 3 mm length, 9 mm length and 7 mm to orthodontic band. The joints were made by five different methods: brazing, tungsten inert gas (TIG) and laser welding with and without filling material. For the original orthodontic wire and for each kind of joint configuration or connecting method 10 specimens were carefully produced, totalizing 240. The fracture strengths were measured with a universal testing machine (Zwick 005). Data were analyzed by ANOVA (p=0.05) and Bonferroni post hoc test (p=0.05). In all cases, brazing joints were ruptured on a low level of fracture strength (186-407 N). Significant differences between brazing and TIG or laser welding (p<0.05, Bonferroni post hoc test) were found in each joint configuration. The highest fracture strength means were observed for laser welding with filling material and 3 mm joint length (998 N). Using filling materials, there was a clear tendency to higher mean values of fracture strength in TIG and laser welding. However, statistically significant differences were found only in the 9-mm long joints (p<0.05, Bonferroni post hoc test). In conclusion, the fracture strength of welded joints was positively influenced by the additional use of filling material. TIG welding was comparable to laser welding except for the impossibility of joining orthodontic wire with orthodontic band.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000500005SolderingBrazingLaser weldingTungsten inert gas weldingWelding with filling material |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jens Johannes Bock Jacqueline Bailly Christian Ralf Gernhardt Robert Andreas Werner Fuhrmann |
spellingShingle |
Jens Johannes Bock Jacqueline Bailly Christian Ralf Gernhardt Robert Andreas Werner Fuhrmann Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material Journal of Applied Oral Science Soldering Brazing Laser welding Tungsten inert gas welding Welding with filling material |
author_facet |
Jens Johannes Bock Jacqueline Bailly Christian Ralf Gernhardt Robert Andreas Werner Fuhrmann |
author_sort |
Jens Johannes Bock |
title |
Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
title_short |
Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
title_full |
Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
title_fullStr |
Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
title_full_unstemmed |
Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
title_sort |
fracture strength of different soldered and welded orthodontic joining configurations with and without filling material |
publisher |
University of São Paulo |
series |
Journal of Applied Oral Science |
issn |
1678-7757 1678-7765 |
publishDate |
2008-10-01 |
description |
The aim of this study was to compare the mechanical strength of different joints made by conventional brazing, TIG and laser welding with and without filling material. Five standardized joining configurations of orthodontic wire in spring hard quality were used: round, cross, 3 mm length, 9 mm length and 7 mm to orthodontic band. The joints were made by five different methods: brazing, tungsten inert gas (TIG) and laser welding with and without filling material. For the original orthodontic wire and for each kind of joint configuration or connecting method 10 specimens were carefully produced, totalizing 240. The fracture strengths were measured with a universal testing machine (Zwick 005). Data were analyzed by ANOVA (p=0.05) and Bonferroni post hoc test (p=0.05). In all cases, brazing joints were ruptured on a low level of fracture strength (186-407 N). Significant differences between brazing and TIG or laser welding (p<0.05, Bonferroni post hoc test) were found in each joint configuration. The highest fracture strength means were observed for laser welding with filling material and 3 mm joint length (998 N). Using filling materials, there was a clear tendency to higher mean values of fracture strength in TIG and laser welding. However, statistically significant differences were found only in the 9-mm long joints (p<0.05, Bonferroni post hoc test). In conclusion, the fracture strength of welded joints was positively influenced by the additional use of filling material. TIG welding was comparable to laser welding except for the impossibility of joining orthodontic wire with orthodontic band. |
topic |
Soldering Brazing Laser welding Tungsten inert gas welding Welding with filling material |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000500005 |
work_keys_str_mv |
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