Shear modulus of 5 flowable composites to the EverStick Ortho fiber-reinforced composite retainer : an in-vitro study

Brauchli, Lorenz and Pintus, Stefano and Steineck, Markus and Lüthy, Heinz and Wichelhaus, Andrea. (2009) Shear modulus of 5 flowable composites to the EverStick Ortho fiber-reinforced composite retainer : an in-vitro study. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, Vol. 135. pp. 54-58.

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Official URL: http://edoc.unibas.ch/dok/A6006763

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INTRODUCTION: Although fiber-reinforced composites (FRC) are now available for use as orthodontic retainers, little is known about their bonding properties. Our aim in this study was to investigate the adhesive properties of various composites to a commercially available FRC retainer. METHODS: Five flowable composites (Grandio Flow [Voco GmbH, Cuxhaven, Germany], Synergy Flow [Coltène/Whaledent AG, Genf, Switzerland], Tetric Flow [Ivoclar Vivadent AG, Schaan Fürstentum, Liechtenstein], Tetric Flow Chroma [Ivoclar Vivadent AG], and Transbond LR [3M Unitek, Monrovia, Calif) were tested for their shear bond strengths to the EverStick Ortho (Stick Tech Ltd Oy, Turku, Finland) FRC retainer stick. Each group contained 15 samples and underwent 1000 aging cycles between 5 degrees C and 55 degrees C. A testing machine was used to measure the shear bond strengths at the composite-FRC interface. All specimens were visually controlled for the location of the fracture line. RESULTS: Typical shear bond strengths were measured at 40 N or 8 MPa. No significant difference was found between the 5 composites (ANOVA, P > or = 0.05). The fracture line was consistently in the FRC retainer. CONCLUSIONS: All composites had similar bonding characteristics, and visual inspection consistently showed fractures in the FRC retainer. Because the point of least resistance was in the retainer, we concluded that all tested composites were equally effective.
Faculties and Departments:03 Faculty of Medicine > Departement Zahnmedizin > Klinik Kieferorthopädie Kinderzahnmedizin > Kieferorthopädie (Verna)
UniBasel Contributors:Brauchli, Lorenz
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:15 Aug 2014 07:16
Deposited On:01 Feb 2013 08:40

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