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. 2017 Aug 11;3(1):53-62.
doi: 10.1080/23337931.2017.1360776. eCollection 2017.

Cobalt-chromium alloys in fixed prosthodontics in Sweden

Maria Kassapidou  1   2 , Victoria Franke Stenport  2 , Lars Hjalmarsson  2   3   4 , Carina B Johansson  2
Affiliations

Cobalt-chromium alloys in fixed prosthodontics in Sweden

Maria Kassapidou et al. Acta Biomater Odontol Scand. .

Abstract

Aim: The aim of this study was to compile the usage of Co-Cr alloys in fixed prosthodontics (FP) among dental laboratories in Sweden. Methods: From March to October 2015, questionnaires were sent to 542 registered dental laboratories in Sweden. The questionnaires were divided in two parts, one for fixed dental-supported prosthodontics (FDP) and one for fixed implant-supported prosthodontics (FIP). Reminders were sent three times. Results: In total of 542 dental laboratories, 55% answered the questionnaires. Most dental laboratories use Co-Cr in FP, 134 (74%) in FDP and 89(66%) in FIP. The laboratories used Co-Cr alloys of various compositions in the prostheses, 35 for FDP and 30 for FIP. The most commonly used Co-Cr alloys for tooth-supported FDPs were (a) Wirobond® 280, (b) Cara SLM and (c) Wirobond® C. For implant-supported frameworks the frequently used alloys were: (a) Cara SLM, (b) Cara Milled and (c) Wirobond® 280. Except for the difference in composition of these alloys, they were also manufactured with various techniques. In tooth-supported prostheses the dominating technique was the cast technique while newer techniques as laser-sintering and milling were more commonly reported for implant-supported constructions. A fourth technique; the 'pre-state' milling was reported in FDP. Conclusion: More than 30 different Co-Cr alloys were reported as being used in FP. Thus, there is a need for studies exploring the mechanical and physical behavior and the biological response to the most commonly used Co-Cr alloys.

Keywords: Prosthodontics; cobalt-chromium survey; dental technician.

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Figures

Figure 1.
Figure 1.
Flow chart for the study showing the total number of questionnaires distributed to 542 dental laboratories; the number of reminders; the number of drop-outs and the total number of envelopes received. *Each dental laboratory received one envelope containing: (a) A letter describing the study. (b) Two questionnaires containing two parts; one for tooth (Part I) – and one for implant-supported fixed prosthodontics (Part II). (c) Return envelope with postage included.
Figure 2.
Figure 2.
Question 2. For tooth-supported, which metal/alloy/ceramics does your laboratory use? For implant-supported, which metal/alloy/ceramics does your laboratory use? *Other: Noble-alloys, palladium-alloys and other ceramics.
Figure 3.
Figure 3.
Co-Cr alloys in tooth-supported fixed prosthodontics. Results from the Swedish survey 2017 indicate that dental laboratories use 35 Co-Cr alloys in fixed tooth-supported prosthodontics. Almost 18% of the dental laboratories registered alloys that could not be identified.
Figure 4.
Figure 4.
Number of Co-Cr alloys used in fixed prosthodontics.
Figure 5.
Figure 5.
Co-Cr alloys in implant-supported fixed prosthodontics. Results from the Swedish survey 2017 indicate that dental laboratories use 30 Co-Cr alloys in fixed implant-supported prosthodontics that are manufactured by three different techniques (laser-sintered, milled and cast). Almost 36% of the dental laboratories registered alloys that could not be identified.
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References

    1. Wataha JC. Alloys for prosthodontic restorations. J Prosthet Dent. 2002;87:351–363. - PubMed
    1. Anusavice KJ, Phillips RW, Shen C, et al. . Chapter 4, Indirect restorative materials In: Phillips' science of dental materials. 12nd ed St. Louis(MO): Elsevier/Saunders; 2013. p. 368.
    1. Bessing C. Oädla legeringar för metallkeramik: Basmetallegeringar [Base metal alloys for porcelain-fused constructions: Base metal alloys]. 2.0 ed Stockholm: Socialstyrelsen, Kunskapscenter för Dentala Material, 2007. [Swedish].
    1. Anusavice KJ. Chapter 19, Dental casting and soldering In: Phillips' science of dental materials. St. Louis (MO): Saunders; 2003. p. 596.
    1. Joias RM, Tango RN, Junho de Araujo JE, et al. . Shear bond strength of a ceramic to Co-Cr alloys. J Prosthet Dent. 2008;99:54–59. - PubMed

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