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Additively Manufactured Titanium and Cobalt-Chromium Implant Frameworks: Fit and Effect' of Ceramic Veneering
Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Örebro University, School of Medical Sciences. Örebro University Hospital. Department of Prosthetic Dentistry, Postgraduate Dental Education Center.ORCID iD: 0000-0001-9240-5053
Department of Prosthodontics/Dental Materials Science, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
2018 (English)In: International Journal of Oral & Maxillofacial Implants, ISSN 0882-2786, E-ISSN 1942-4434, Vol. 33, no 3, p. 590-596, article id PMID 29763497Article in journal (Refereed) Published
Abstract [en]

Purpose: The purpose of this study was to evaluate the fit of additively manufactured cobalt-chromium and titanium and CNC-milled titanium frameworks before and after ceramic veneering.

Materials and Methods: Ten stone casts simulating an edentulous maxilla provided with six abutment analogs were produced. For each stone cast, one additively manufactured cobalt-chromium framework (AM CoCr) and one titanium framework (AM Ti) were fabricated. The fit was analyzed with a coordinate measuring machine in three dimensions (x, y, and z axes) using best-fit virtual matching of center point coordinates, before and after ceramic veneering. CNC-milled titanium frameworks (CNC Ti) and earlier results from CNC-milled cobalt-chromium frameworks (CNC CoCr) were used for comparison.

Results: All frameworks presented minor misfit before and after veneering in the horizontal plane (x- and y-axes) between 2.9 and 13.5 mu m and in the vertical plane (z-axis) between 1.6 and 5.4 mu m. Ceramic veneering affected the fit of all groups of frameworks. Both AM Ti and AM CoCr presented significantly smaller distortion in the vertical plane compared with the CNC-milled frameworks.

Conclusion: Implant-supported frameworks can be produced in either Ti or CoCr using either CNC milling or additive manufacturing with a fit well within the range of 20 mu m in the horizontal plane and 10 mu m in the vertical plane. The fit of frameworks of both materials and production techniques are affected by the ceramic veneering procedure to a small extent.

Place, publisher, year, edition, pages
Quintessence Publishing Co. Inc. , 2018. Vol. 33, no 3, p. 590-596, article id PMID 29763497
Keywords [en]
additive manufacturing, chromium, cobalt, dental marginal adaptation, dental prosthesis, implant-supported, metal ceramic alloys, titanium
National Category
Dentistry
Identifiers
URN: urn:nbn:se:oru:diva-69255DOI: 10.11607/jomi.6028ISI: 000444698700016PubMedID: 29763497Scopus ID: 2-s2.0-85048032707OAI: oai:DiVA.org:oru-69255DiVA, id: diva2:1253289
Note

Funding Agencies:

Adlerbertska Research Foundation  

Sylvan Foundation  

Hjalmar Svenssons Foundation  

Wilhelm and Martina Lundgren Foundation  

Dentsply Sirona Implants, IIS grant  I-IS-15-057 

Available from: 2018-10-04 Created: 2018-10-04 Last updated: 2018-10-04Bibliographically approved

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Eliasson, Alf

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