Untersuchung der Scherhaftfestigkeit von konventionellen und selbstätzenden Adhäsiv-Systemen an kieferorthopädischen Metallbrackets

Scherhaftfestigkeitsprüfung an kieferorthopädischen Metallbrackets zur Untersuchung unterschiedlicher Adhäsiv-Systeme. Ziel dieser in-vitro-Studie war es, die Haftfestigkeit von Scotchbond Universal mit dem Marktführer selbstätzender Adhäsiv-Systeme Prompt L-Pop und dem als Goldstandard geltenden...

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Bibliographic Details
Main Author: Rusdea, Patrick
Contributors: Korbmacher-Steiner, Heike (Prof. Dr. med. dent.) (Thesis advisor)
Format: Doctoral Thesis
Language:German
Published: Philipps-Universität Marburg 2016
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Comparison of shear bond strength with orthodontic brackets is a common way to determine bonding failure of different bonding agents. The aim of this study was to evaluate the shear bond strength of the selfetching agent Scotchbond Universal and compare it with two established bonding agents (Transbond XT, Prompt L-Pop) of clinical orthodontic. A total of sixty extracted human premolars were used in this Study. The teeth were randomly divided into three groups. The shear bond strength was measured using a testing machine „Zwick 1120.25“ (Fa. Zwick, Ulm, Deutschland). The statistical evaluation was done with the programm „SPSS 21.0.0“ (IBM, Chicago, USA) for Mac. The results validate that the shear bond strength is sufficiently strong enough for clinical use. The highest shear bond strength score was reached by Prompt L-Pop with 25,33 MPa. Transbond XT produced the highest mean bond strength of 15,49 MPa. Analysis of the Shear bond strength indicated a normal deviation and no differences in mean bond strength. The results of the Adhesiv Remnant Index show no significant difference regarding the fracture behaviour of all three bonding agents. In consideration of the results, the use of Scotchbond Universal for bonding metalbrackets to human enamel is advisable. Scotchbond Universal contains the monomer MDP and according to the manufacturer is able to bond on metal or ceramic surfaces without further pretreatment. A follow up study is recommended to evaluate the potential of Scotchbond Universal on preserving treated tooth and prosthetic restorations. Such a study would further investigate, whether the shear bond strength is comparable to bonding agents which need additional chemical pretreatment of ceramic or metal surfaces.