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...

Full description

Bibliographic Details
Main Authors: Jens Johannes Bock, Jacqueline Bailly, Christian Ralf Gernhardt, Robert Andreas Werner Fuhrmann
Format: Article
Language:English
Published: University of São Paulo 2008-10-01
Series:Journal of Applied Oral Science
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000500005
id doaj-86fc2b5a7ee248728c09ec4495e6cb46
record_format Article
spelling 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 AT jensjohannesbock fracturestrengthofdifferentsolderedandweldedorthodonticjoiningconfigurationswithandwithoutfillingmaterial
AT jacquelinebailly fracturestrengthofdifferentsolderedandweldedorthodonticjoiningconfigurationswithandwithoutfillingmaterial
AT christianralfgernhardt fracturestrengthofdifferentsolderedandweldedorthodonticjoiningconfigurationswithandwithoutfillingmaterial
AT robertandreaswernerfuhrmann fracturestrengthofdifferentsolderedandweldedorthodonticjoiningconfigurationswithandwithoutfillingmaterial
_version_ 1725057277546725376