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Clinical Oral Investigations

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Open Access 18-08-2022 | Original Article

Orthodontic shear bond strength and ultimate load tests of CAD/CAM produced artificial teeth

Authors: Christoph J. Roser, Thomas Rückschloß, Andreas Zenthöfer, Peter Rammelsberg, Christopher J. Lux, Stefan Rues

Published in: Clinical Oral Investigations | Issue 12/2022

Abstract

Objectives

To investigate whether artificial CAD/CAM processed (computer-aided design/manufacturing) teeth could be a feasible option for the production of dental in vitro models for biomechanical testing.

Material and methods

Disks (n = 10 per group) made from two different CAD/CAM-materials, one fiber-reinforced composite (FRC; Trinia, Bicon) and one polymethylmethacrylate-based resin (PMMA; Telio CAD, Ivoclar Vivadent), as well as bovine teeth (n = 10), were tested for their shear bond strength (SBS) and scored according to the adhesive remnant index (ARI). In addition, CAD/CAM-manufactured lower incisor teeth were tested for their ultimate load (F_u).

Results

With regard to SBS, both PMMA (17.4 ± 2.2 MPa) and FRC (18.0 ± 2.4 MPa) disks showed no significant difference (p = 0.968) compared to bovine disks (18.0 ± 5.4 MPa). However, the samples differed with regard to their failure mode (PMMA: ARI 4, delamination failure; FRC: ARI 0 and bovine: ARI 1.6, both adhesive failure). With regard to F_u, FRC-based teeth could withstand significantly higher loads (708 ± 126 N) than PMMA-based teeth (345 ± 109 N) (p < 0.01).

Conclusion

Unlike PMMA-based teeth, teeth made from FRC showed sufficiently high fracture resistance and comparable SBS. Thus, FRC teeth could be a promising alternative for the production of dental in vitro models for orthodontic testing.

Clinical relevance

CAD/CAM-processed teeth made from FRC enable the use of standardized geometry and constant material properties. Using FRC teeth in dental in vitro studies has therefore the potential to identify differences between various treatment options with rather small sample sizes, while remaining close to the clinical situation.

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Title: Orthodontic shear bond strength and ultimate load tests of CAD/CAM produced artificial teeth
Authors: Christoph J. Roser
Thomas Rückschloß
Andreas Zenthöfer
Peter Rammelsberg
Christopher J. Lux
Stefan Rues
Publication date: 18-08-2022
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 12/2022
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-022-04676-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Orthodontic shear bond strength and ultimate load tests of CAD/CAM produced artificial teeth

Abstract

Objectives

Material and methods

Results

Conclusion

Clinical relevance

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objectives

Material and methods

Results

Conclusion

Clinical relevance

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