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|Adhäsiver Verbund zum Wurzeldentin in Abhängigkeit von der Wurzelkanaltiefe, dem Befestigungsmaterial, der Spüllösung und der Befestigungsmethode|
|Main title||Adhäsiver Verbund zum Wurzeldentin in Abhängigkeit von der Wurzelkanaltiefe, dem Befestigungsmaterial, der Spüllösung und der Befestigungsmethode|
|Subtitle||eine in vitro Untersuchung|
|Title variations||Ahesive luting to root dentin depending on location within the root canal, the luting composite, the irrigation agent, and the application method|
|Subtitle for translated title||an in-vitro study|
Place of birth: Greifswald
|1. Referee||Prof. Dr. K.-R. Jahn|
|Further Referee(s)||Prof. Dr. med. dent. St. Zimmer
Priv.-Doz. Dr. M. Naumann
|Keywords||adhesive technique, glass fibre reinforced composite post, push-out test, luting composite, irrigation agent, application method|
|Classification (DDC)||610 Medical sciences; Medicine|
|Summary||The aim of this in-vitro study was to assess the bond strength of luting composites in the root canal during post-endodontic reconstruction. The variables considered were the location within the root canal, the luting composite, the irrigation agent, and the application method.
In 180 single-rooted canines post holes were prepared and fibre-reinforced posts were adhesively luted. Prior to luting of the posts, the root canal was irrigated using different endodontic irrigation agents (NaOCl, EDTA, chlorhexidine gluconate). Three luting composites (Super-Bond C&B, Multilink, Panavia F 2.0) were used in accordance with the manufacturer's specifications to lute posts. Two application methods were used: in one, the luting agent was applied only to the post (method “S”), whereas in the other, it was applied to the post and also into the canal (method “SK”).
After four weeks of storage in distilled water, three cross sections with a thickness of 2 mm ± 0.1 mm were taken from each tooth using a water-cooled diamond annular saw. The bond strength was subsequently calculated using the maximum strength, which was measured by means of a push-out test with a universal testing machine (Zwick).
For each of the variables: root canal depth (cervical, middle, and apical); luting material (Super Bond C&B, Multilink, Panavia); and irrigation agent (NaOCl, EDTA, chlorhexidine gluconate), a comparison of the bond strength was carried out with the Kruskal-Wallis test, followed by the Bonferroni-Dunn test with α-adjustment. For comparison of the two application methods, the Mann-Whitney-U-test was used. The respective significance levels were determined by p = 0.05.
The depth within the root canal had no uniform influence on the bond strength. Only a few significant differences could be verified. Therefore, the hypothesis that the adhesive bonding varies according to the root canal depth could not be confirmed. These results were attributed to the fact that microbrushes allowed the uniform application of the composite adhesive of Panavia and Multilink in the entire post preparation. Super-Bond C&B, being a very fluid material, coats the walls of the preparation also very well, even in deep areas.
The bond strength however is significantly influenced by the luting composite, the irrigation agent and the application method. Comparing the luting composites, Super-Bond C&B achieved very high bond strength values when used with the irrigation agent EDTA; whereas the application method had no influence. With Multilink and Panavia F 2.0, using the “SK” application method, significantly higher values were found compared to application method “S”. The irrigation agent NaOCl in combination with the luting composite Super-Bond C&B showed the lowest bond strength values.
When selecting luting composites for post-endodontic reconstruction with root posts, attention must be paid to the compatibility of the luting agent with the irrigation agent as well as to the application method used.
Dataobject from FUDISS_thesis_000000005270
|Number of pages||96 Bl.|
|FU Department||Department of Medicine - Charité - University Medicine Berlin|
|Year of publication||2008|
|Document type||Doctoral thesis|
|Date of defense||2008-11-21|
|Created at||2009-02-11 : 01:32:22|
|Last changed||2010-02-19 : 01:19:58|