Özet:

The purpose; The purpose of this study is to evaluate the impact of the materials containing tricalcium silicate on the coronal coloring of the teeth by spectofotometers; In this study, 50 pieces of maxils were used in central teeth. The teeth were divided into 5 groups (n=10). The teeth were kept at 37 °C in a 100% moist environment. The apical parts of the tooth roots were removed from the 2 mm apical of the mine-sement combination with diamond freezes. After the apical entrance, the Gates Glidden frezler was extended using the number 1 to 6. The groups were identified as the negative control group, Biodentin, Bioaggregate, ProRoot MTA and the positive control group (defibrine blood). Reperative material is placed in the cabin so that it will be 2 mm thick and the cabin entrance with the glass ionomer is closed. In the color measurement, Vita Easyshade Advance spectrophotometer was used. Materials before placing (T0), after placing 1. The week (T1) 2. 5 times per week (T2), 1 month (T3) and 2 months (T4) the color change amount (ΔE) was measured. The Commission Internationale de l'eclairage L*a*b* changes were compared by measurement for each group. In the negative control group, biodentin and bioaggregate groups, no significant color change was observed in the tooth crown. These groups also resulted in less coloring compared to the ProRoot MTA and the Positive Control Group.The positive control group and the ProRoot MTA groups observed L* values decreased during the two-month evaluation process, and the colour of the samples changed over time. The result; in the front-group teeth in which aesthetics gains importance, it is possible to prefer dentin repair materials such as Biodentine or Bioaggregate containing silicate trical as an alternative to MTA. Keywords: Bioaggregate, Biodentin, ProRoot MTA, Spektrofotometre IN VITRO SPECTROPHOTOMETRIC ANALYSIS OF CORONAL TOOTH DISCOLORATION INDUCED BY THREE DIFFERENT TRICALCIIUM SILICATE BASED ENDODONTIC MATERIALS ABSTRACT AIM; The aim of this study is to evaluate the coronal tooth discoloration caused by the materials used in such applications, by using spectrofotometers. Material and Methods; Fifty extracted human maxillary central incisor teeth were used in this study. Teeth were randomly assigned into 5 groups (n = 10) and stored in saline solution at 37 °C in 100% humidity. Apical part of the root, was removed 2 mm below the semento-enamel junction. Then apical access cavity was made in 5 groups and prepared by using Gates Glidden files (Dentsply, Maillefer, USA) at number 1 to 6. The groups were as follows: Negative control group, Biodentin, Bioaggregate, ProRoot MTA and Positive control group (bovine animal blood). A 2-mm-thick increment of reparative material was placed on the pulpal floor, covered by glass ionomer cement. Color change was evaluated with Easyshade Advance Spectrophotometer at 5 time points: day 0 (T0), day7 (T1), day 14 (T2), 1 month (T3) and 2 months (T4). Changes in Commission Internationale de l'eclairage L*a*b* were measured for each experimental group and compared with each other. There were no significant differences between negative control group, biodentin and bioaggregate group. These groups produced significantly less discoloration than ProRoot MTA and positive control group. There were significant drops in the values of L* from T0 to T4 in the Positive control group and ProRoot MTA group. The values decreased over time as the samples became darker.. Conclusions; Tricalcium Silicate based materials such as Biodentine or Bioaggregate can be preferred instead of MTA in the previous teeth, where the aesthetic outcome is very important. Keywords; Bioaggregate, Biodentin, ProRoot MTA, Spectrophotometre

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