Effektivität und Sicherheit von drei Techniken zur Entfernung von MTA, Biodentine und TotalFill Putty nach Pulpaamputation. Eine Mikro-CT-Studie

by Julia Katharina Florentine Anke
Doctoral thesis
Date of Examination:2024-07-18
Date of issue:2024-07-09
Advisor:Prof. Dr. Michael Hülsmann
Referee:Prof. Dr. Sven Rinke
Referee:Prof. Dr. Thomas Meyer
Persistent Address: http://dx.doi.org/10.53846/goediss-10587

 

 

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Abstract

English

Aim of the study: The aim of the study was to compare the removability of the dental cements mineral trioxide aggregates (MTA), Biodentine and TotalFill Putty with diamond drills, diamond ultrasonic tips (Sonic Sys) and carbide drills regarding the associated removal of hard tooth substance, the cement residues and the required time. Methodology: Ninety extracted human molars were trepanned and divided into three groups (MTA: n=30, Biodentine: n=30, TotalFill Putty: n=30) each with three subgroups (diamond drill, diamond ultrasonic tips, carbide drill) (n=10). One of the three cements was then applied into the pulp cavity. After complete hardening, the cement was removed using one of the instruments with the optical aid of a dental microscope by a for the cement blinded dentist and the time required for this was measured. The analysis and evaluation of the loss of tooth structure and the cement residue was carried out with the help of micro-computed tomography images, which were taken at the time of trepanation, cement application and after the cement was removed. Results: Regarding the loss of tooth structure, there were no significant differences depending on the material (p = 0.15). When using the Sonic Sys, significantly less dentin was removed from all materials than with the diamond drill (p = 0.0004). The same applies to the comparison of Sonic Sys and the carbide drill for Biodentine (p = 0.0001) and Total Fill Putty (p = 0.04). At the same time, the Sonic Sys took the longest time (p = 0.0001). Cement residues were visible in all subgroups; there were no significant differences in the amount of these, neither in the materials (p = 0.29) nor in the instruments (p = 0.48). Conclusions: In summary the results show a similar effectiveness of the three instruments in removing the cements. The type of cement has no influence on the required time or completeness of removal. The use of ultrasound results in a gentler but more time-consuming removal of the cements.
Keywords: Mineral trioxide aggregates; MTA; Biodentine; TotalFill Putty; Pulpotomy; Bioceramic cements
Schlagwörter: Mineraltrioxid-Aggregate; MTA; Biodentine; TotalFIll Putty; biokeramische Zemente; Pulpotomie
 
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