Laser Welding of Different Dental Alloys

Ardelean, Lavinia; Reclaru, Lucien; Borţun, Cristina Maria; Ghiban, Brânduşa

doi:10.5772/intechopen.76347

Cited by 4 publications

(9 citation statements)

References 11 publications

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“…Shielding gas is used to protect the melt, and welding can take place with or without a filler metal. This type of welding allows for high advancement speeds, reduced thermally altered areas, small deformations of the welded piece, the absence of slag and spatter and the possibility of operating through any transparent medium [60,61]. The beam does not need to contact the piece and can be directed, inclined and focused by suitable optical systems.…”

Section: Laser Weldingmentioning

confidence: 99%

Soldering in Dentistry: An Updated Technical Review

Cumbo,

Gallina,

Messina

et al. 2024

JCM

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Introduction: The need to permanently join two or more pieces of metal using heat is a frequent condition in various fields of medicine such as dentistry. Welding, brazing and soldering are permanent joining techniques between different metals that require in-depth background knowledge in order to obtain predictable results. Aim: This review examines the different methods of joining metals using heat and their fields of application. Discussion: It is possible to create permanent metal joints in various phases of the creation of final products that will be used on the patient. In several cases, welds are also made directly by the manufacturer during industrial processing. In dentistry, dental laboratories perform complex welds mainly on dental prostheses and orthodontic appliances during the production process. It is also possible to obtain intraoral welding carried out by the clinician inside the patient’s oral cavity. Welding can be carried out using combustible gases, electric current, infrared light and laser light through different technical procedures which must be chosen according to the specific needs and the metals to be joined. Conclusions: It is useful for the dentist and dental technician to know the different welding methods, including those carried out in the factory by the manufacturer, to better understand the physical properties and mechanical resistance of the components marketed for the construction of prostheses and orthodontic appliances. The enormous variety of conditions in which those who practice welding can find themselves therefore presupposes in-depth knowledge in this field in order to apply the most suitable technique.

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Section: Laser Weldingmentioning

confidence: 99%

Soldering in Dentistry: An Updated Technical Review

Cumbo,

Gallina,

Messina

et al. 2024

JCM

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“…The parts to be joined are pressed into the desired position and a laser beam is passed over them. In most cases, the joint is not fully welded and small irregularities remain in the joint that can cause stress concentration on the rest of the joint [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The main advantages of laser welding are the high energy concentration and welding speed, the high penetration depth of the beam into the material, the low heat input, the low total temperature rise and the effect on a narrow surface with a high cooling rate and low deformations [12,13,[15][16][17]. However, it should be mentioned that welded areas have a higher probability of damage than the rest of the structure, and weakened areas of the basic structure are also possible, so it is recommended to use them in low-stress zones.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

Carek

Benić

Buković

et al. 2023

Metals

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In order to improve the hold and function of dentures for the patient, various prostheses made of metal, mostly metal alloys, are used every day in dental practise. Cobalt-chromium alloys are usually the first choice because they have very good mechanical properties and satisfactory clinical conditions. Nowadays, laser welding is increasingly used in dental practise due to its numerous advantages over other technologies. In this work, therefore, six commercially available Co-Cr alloys were investigated. Three of them are used for metal-ceramic work, two for denture frameworks and one is suitable for both applications. They were joined by laser welding and subsequently analysed microscopically. Their mechanical properties were determined and statistically evaluated. The microhardness of the laser-welded alloys is in the range of 282–465 MPa in the weld zone and between 283 and 435 MPa in the heat-affected zone. The flexural strength of the laser-welded alloys is lower than the control group, but an alloy for the metal-ceramic work (I-BOND NF) shows very similar value. Furthermore, this alloy, together with two other metal-ceramic alloys, survived a maximum of cycles in dynamic tests. It was found that the laser method can be used for joining Co-Cr alloys while ensuring appropriate parameters that guarantee the quality of the dental work.

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“…Metals with none or limited references as mutagens are Cu 1+ , Sn 4+ , Au, Pt, Ag, Pd, In, and G [8,9,14].…”

Section: Introductionmentioning

confidence: 99%

“…A major characteristic that concerns any metallic material used for medical applications is good resistance to corrosion, and this is the most relevant property when it comes to its biologic safety [8]. The tendency of a metal to corrode is given by its electrode potential.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent Alloys for Biomedical Applications

Reclaru¹,

Ardelean²,

Grecu³

et al. 2020

Engineering Steels and High Entropy-Alloys

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Titanium alloys are considered to be the most advanced materials for orthopedic implants due to the favorable combination of mechanical properties, low density, tissue tolerance, high strength-to-weight ratio, good resistance to corrosion by body fluids, biocompatibility, low density, nonmagnetic properties, and the ability to join with the bone. This is the reason why we decided to assess the resistance of two titanium alloys currently used for orthopedic implants, namely, Ti6Al7Nb and Ti6Al4V, as reference, to cyclic fatigue by dynamic tests with crevice corrosion stimulation. According to the results obtained, the examined electrochemical quantities, the visual and SEM observations, and EDX analysis reveal better corrosion behavior of the prostheses made of Ti6Al4V-anodized series compared to prostheses made of Ti6Al7Nb. The further comparison of two explanted proximal modules, made of Ti6Al7Nb and Ti6Al4V, to the same type of prostheses evaluated by cyclic fatigue dynamic tests with crevice corrosion stimulation reveals that there are significant similarities, in particular with regard to the electrolyte diffusion, deposition of products and corrosion. Cation extraction tests which were carried out for Ti6Al7Nb prostheses that have undergone particular surface treatments show significant differences depending on the surface treatment and demonstrate that orthopedic implant materials are not "inert."

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Laser Welding of Different Dental Alloys

Cited by 4 publications

References 11 publications

Soldering in Dentistry: An Updated Technical Review

Soldering in Dentistry: An Updated Technical Review

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

Multicomponent Alloys for Biomedical Applications

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