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Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

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Published/Copyright: June 11, 2016
Biomedical Engineering / Biomedizinische Technik
From the journal Biomedical Engineering / Biomedizinische Technik Volume 62 Issue 3

Abstract

Objective:

The aim of the present study was to test the mechanical properties of different adhesives used in orthodontics for fixed retainers and to investigate their possible interrelations.

Materials and methods:

Specimens of six different adhesive resins were prepared: Transbond XT, Transbond LR and an experimental BPA-free orthodontic adhesive, as well as IPS Empress Direct (IPS-ED), ZNano and Accolade. The mechanical properties tested were Martens hardness (HM), indentation modulus (EIT), the ratio of elastic to total work, commonly known as elastic index (ηIT) and Vickers hardness (HV). These properties were determined using instrumented indentation testing according to ISO 14577-2002. The results of the aforementioned properties were statistically compared with one-way ANOVA-test and Student-Newman-Keuls multiple comparison test at a=0.05, while possible correlations among the properties tested were analyzed by Pearson correlation.

Results:

Significant differences were identified among all the materials tested for HM, with Transbond LR presenting the highest value. This resin presented the highest EIT too. Significant EIT differences were identified among the materials and only ZNano and IPS-ED showed no significant differences for this property. Transbond LR and ZNano showed higher HV values. ZNano demonstrated the highest elastic index. Pearson analysis showed a strong positive correlation between HM and EIT (0.970), HM and HV (0.837), and EIT and HV (0.695), while a weak negative correlation was found between EIT and elastic index (-0.505).

Conclusions:

The materials tested demonstrated significant differences in their mechanical properties, and thus differences in their clinical performance are anticipated.

Keywords: dental composite resin; fixed retainer; hardness; indentation modulus
Corresponding author: Prof. Theodore Eliades, DDS, MS, Dr Med Sci, PhD, Director of the Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, CH-8032 Zurich, Switzerland, Phone: +41 44 634 32 10/11, Fax: +41 44 634 43 35

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Received: 2015-8-25
Accepted: 2016-5-11
Published Online: 2016-6-11
Published in Print: 2017-5-24

©2017 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/bmt-2015-0165
Keywords for this article
dental composite resin; fixed retainer; hardness; indentation modulus

Articles in the same Issue

  1. Frontmatter
  2. Review
  3. Bone plates for osteosynthesis – a systematic review of test methods and parameters for biomechanical testing
  4. Research articles
  5. Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
  6. Larger screw diameter may not guarantee greater pullout strength for headless screws – a biomechanical study
  7. Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
  8. Migration measurement of the cemented Lubinus SP II hip stem – a 10-year follow-up using radiostereometric analysis
  9. Shear stress and von Mises stress distributions in the periphery of an embedded acetabular cup implant during impingement
  10. Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
  11. Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
  12. Feasibility study of using a Microsoft Kinect for virtual coaching of wheelchair transfer techniques
  13. Accuracy of leg alignment measurements from antero-posterior radiographs
  14. Holoentropy enabled-decision tree for automatic classification of diabetic retinopathy using retinal fundus images
  15. Pattern recognition of enrichment levels of SELEX-based candidate aptamers for human C-reactive protein
  16. Source localization of S-cone and L/M-cone driven signals using silent substitution flash stimulation
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