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Comparisons Fitness in Implant Abutment between Gas Soldering and Laser Welding
Int J Clin Prev Dent 2018;14(4):247-255
Published online December 31, 2018;
© 2018 Korean Academy of Preventive Dentistry.

Mi-Hyang Cho1, Shin-Eun Nam2

1Department of Dental Laboratory Technology, Wonkwang Health Science University, Iksan, 2Baron Dental Lab, Busan, Korea
Correspondence to: Shin-Eun Nam
Baron Dental Lab, 24 Myeongnyun-ro 94beon-gil, Dongnae- gu, Busan 47814, Korea. Tel: +82-51-558-2804, Fax: +82- 51-511-1708, E-mail:
Received November 13, 2018; Revised December 6, 2018; Accepted December 12, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Objective: Osseointegration is essential process for successful implants and effects to implant in long term, therefore, passive fitness of good prosthesis is necessary. To make a good prosthesis, at first it should be done a sectioned casting and then joined method of sectioned casting body is recommended.
Methods: In this study, to provide the fundamental data on stable connection method for successful implants, the author tested fitness of casting body, and compared difference between gas soldering technique and laser welding technique.
Results: In fitness test of 2 abutment (test A, C), gas soldering group’s fitness in the opposite part of connection was worse than laser welding group. In fitness test of 3 abutment (test B, D), gap distance was increased both in gas soldering technique and laser welding technique. Gap distance at the connecting part and the opposite part of the abutment in gas soldering technique was worse than laser welding technique and the more additional abutment, the worse gap distance in gas soldering technique. In fitness test of 3 abutment (test B, D), there’s little variation in No. 2 abutment when connecting soldering process was done and there’s little influence on already soldered connection part when the additional soldering connection was done.
Conclusion: On weak loading condition and the part which is needed an accuracy, laser welding technique is more effective and on long-span prosthesis and frequent chewing loading part, laser welding technique is recommended first and applying additional gas soldering technique would be better for making much more successful prosthesis.
Keywords : dental implants, fitness, gap distance, gas soldering, laser welding

December 2018, 14 (4)