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Creep, Hardness, and Elastic Modulus of Lingual Fixed Retainers Adhesives


Hassan, Manár Nasir. Creep, Hardness, and Elastic Modulus of Lingual Fixed Retainers Adhesives. 2020, University of Zurich, Faculty of Medicine.

Abstract

The aims of this study were twofold: a) to characterize a wide array of time-independent and -dependent properties and b) to find possible correlations among the properties tested. Seven commercially available orthodontic adhesives were included in this study and ten cylindrical specimens were prepared from each material. Five specimens from each material were used for the characterization of Martens Hardness (HM), indentation modulus (EIT), and elastic index (ηIT), and the remaining five for the determination of indentation creep (CIT). Al the aforementioned properties were identified by employing an Instrumented Indentations Testing (IIT) device with a Vickers indenter. The results of HM, EIT, ηIT, and CIT were statistically analyzed by one way ANOVA and Tukey post hoc test, while the possible correlations among the aforementioned properties were determined by Spearman correlation test. Statistical significant differences were identified for all properties among the materials tested. Spearman correlation reveals that HM has a positive correlation with EIT. Both properties demonstrated a negative correlation with ηIT and CIT, while no correlation was identified between ηIT and CIT. Significant differences in the mechanical properties tested may also imply differences in their clinical behavior and efficacy.

Abstract

The aims of this study were twofold: a) to characterize a wide array of time-independent and -dependent properties and b) to find possible correlations among the properties tested. Seven commercially available orthodontic adhesives were included in this study and ten cylindrical specimens were prepared from each material. Five specimens from each material were used for the characterization of Martens Hardness (HM), indentation modulus (EIT), and elastic index (ηIT), and the remaining five for the determination of indentation creep (CIT). Al the aforementioned properties were identified by employing an Instrumented Indentations Testing (IIT) device with a Vickers indenter. The results of HM, EIT, ηIT, and CIT were statistically analyzed by one way ANOVA and Tukey post hoc test, while the possible correlations among the aforementioned properties were determined by Spearman correlation test. Statistical significant differences were identified for all properties among the materials tested. Spearman correlation reveals that HM has a positive correlation with EIT. Both properties demonstrated a negative correlation with ηIT and CIT, while no correlation was identified between ηIT and CIT. Significant differences in the mechanical properties tested may also imply differences in their clinical behavior and efficacy.

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Additional indexing

Item Type:Dissertation (monographical)
Referees:Eliades Theodore
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic of Conservative and Preventive Dentistry
04 Faculty of Medicine > Center for Dental Medicine > Clinic for Orthodontics and Pediatric Dentistry
UZH Dissertations
Dewey Decimal Classification:610 Medicine & health
Language:English
Place of Publication:Zürich
Date:2020
Deposited On:12 Feb 2021 12:47
Last Modified:23 Feb 2021 13:57
Additional Information:Diese Dissertation wurde im Journal Materials mit folgender Zitation Hassan, Manár Nasir, Creep, hardness, and elastic modulus of lingual fixed retainer adhesives, 2020/ DOI: 10.3390/ma12040646 publiziert. .
OA Status:Closed
Free access at:Related URL. An embargo period may apply.
Related URLs:https://www.zora.uzh.ch/id/eprint/186033/
https://pubmed.ncbi.nlm.nih.gov/30795503/
https://www.mdpi.com/1996-1944/12/4/646

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