scholarly journals Effect of Immediate and Delayed Postpreparation on the Integrity of the Apical Seal: An in vitro Study

2012 ◽  
Vol 13 (2) ◽  
pp. 153-156
Author(s):  
Abhay Kamra ◽  
Shantanu Choudhari ◽  
Sarvesha Bhondwe ◽  
S Srilatha ◽  
Neha Chhasatia Desai ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Gutta Percha ◽  
Significant Difference ◽  
Relationship Of ◽  
The Relationship ◽  
Apical Leakage ◽  
One Way Anova

ABSTRACT Aim The aim of this in vitro study was to evaluate if there is any significant difference in apical leakage when gutta-percha is removed immediately after obturation for postspace preparation or after a week. Materials and methods Two commonly used sealers AH26 and tubliseal were used in four groups each consisting of 20 teeth each. The tooth was sectioned at the amelocemental junction to leave a root portion of 12 to 14 mm. Canals were checked for patency and prepared to No-55 K file size. Two people, using a stereomicroscope, independently evaluated each tooth-half for the extent of apical leakage. Results The leakage results were analyzed using a one-way ANOVA according to present study, immediate postpreparation is preferable than delayed postpreparation. The relationship of in vitro leakage measurements to the in vivo situation has not been established. Clinical implication Hence, immediate postpreparation is preferable than delayed postpreparation. How to cite this article Bhondwe S, Kamra A, Choudhari S, Srilatha S, Desai NC, Pandit VS. Effect of Immediate and Delayed Postpreparation on the Integrity of the Apical Seal: An in vitro Study. J Contemp Dent Pract 2012;13(2):153-156.

scholarly journals Evaluation of the apical microleakage of MTA Fillapex, AH26, and Endofill sealers

2020 ◽  
Vol 23 (3) ◽  
Author(s):  
Saeedeh Galledar ◽  
Robab Farhang ◽  
Malek Abazari ◽  
Parisa Negahdar
Keyword(s):  
Root Canal ◽  
Test Group ◽  
In Vitro Study ◽  
Negative Control ◽  
Vitro Study ◽  
Control Group ◽  
Dye Penetration ◽  
Gutta Percha ◽  
Significant Difference

Objective: Proper apical seal plays an important role in the success of root canal treatment. The most common cause of failure of root canal therapy is known as the lack of adequate apical seal. The aim of this in vitro study was to compare the apical microleakage of MTA Fillapex, , and Endofill sealers using dye penetration method. Material and Methods: In this in vitro study, 72 single-rooted extracted human teeth were selected. The teeth were randomly divided into three experimental groups of 20 and two positive and negative control groups of 6. The canals were prepared by step-back technique and then filled with gutta-percha and one of the sealers mentioned. In the positive control group, the canals were filled with gutta-percha without sealer, and in the negative control group, the canals were prepared but not filled. The teeth were immersed in 2% methylene blue dye for 72 hours. The teeth were then cut longitudinally and the level of dye penetration was measured under a stereomicroscope. Data were analyzed by SPSS ver. 19 software, ANOVA and Bonferroni post-hoc tests. Results: The mean level of dye penetration in the Endofill test group was significantly higher than that in the  and MTA Fillapex test groups. While, the observed difference between  and MTA Fillapex groups was not statistically significant (p<0.05). Conclusion: The results of this study showed that  and MTA Fillapex sealers did not show any significant difference in apical seal properties. However, their sealing strength was significantly greater than Endofill sealer.KeywordsAH26 sealer; Endofill; MTA Fillapex; Microleakag

scholarly journals Primary Stability of Three Different Osteotomy Techniques in Medullary Bone: An in Vitro Study

2020 ◽  
Vol 8 (1) ◽  
pp. 21 ◽  
Author(s):  
Ferdinando Attanasio ◽  
Alessandro Antonelli ◽  
Ylenia Brancaccio ◽  
Fiorella Averta ◽  
Michele Mario Figliuzzi ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Primary Stability ◽  
Vitro Study ◽  
In Vivo Studies ◽  
Insertion Torque ◽  
Medullary Bone ◽  
Significant Difference ◽  
Twist Drills

Background: The aim of this in vitro study was to analyse the primary stability of 20 implants placed with Twist drills (TD) versus 20 implants placed with Summers osteotomes (SO) and 20 implants placed with B&B bone compactors (BC) in medullary bone (quality type III and type IV). Methods: The implants were placed in 10 fresh pig ribs fixed on a bench vice in order to avoid micro-movements during surgical procedures and measure recording. Peak insertion torque (PIT) and Peak removal torque (PRT) were recorded with MGT-12 digital torque gauge and ISQ was recorded through OSSTELL ISQ™ device by an independent operator. Results: Comparing our data (Tukey test p = 0.05), it was evidenced a statistically significant difference in the PIT between TD and BC groups (p = 0.01). Analysing ISQ data, there was a statistically significant difference between the TD and BC groups (p = 0.0001) and between the SO and BC groups (p = 0.014). The analysis of PRT evidenced a statistically significant difference between the TD and BC groups (p = 0.038). Conclusions: This study evidenced that bone compactor preparation can positively influence primary implant stability (PS), however further in vivo studies and a larger sample are necessary to assess the usefulness in several clinical settings.

Effects of TSH and calcitriol on bone metabolism: in vivo and in vitro study

2014 ◽  
Author(s):  
Ivo Dumic-Cule ◽  
Dunja Rogic ◽  
Damir Jezek ◽  
Lovorka Grgurevic ◽  
Slobodan Vukicevic
Keyword(s):  
Bone Metabolism ◽  
In Vitro Study ◽  
Vitro Study

scholarly journals Marginal and Internal Fit of Ceramic Prostheses Fabricated from Different Chairside CAD/CAM Systems: An In Vitro Study

2021 ◽  
Vol 11 (2) ◽  
pp. 857
Author(s):  
Keunbada Son ◽  
Kyu-Bok Lee
Keyword(s):  
Computer Aided Design ◽  
In Vitro Study ◽  
Vitro Study ◽  
Marginal Gap ◽  
Significant Difference ◽  
Cad Cam ◽  
Ceramic Crowns ◽  
Internal Fit ◽  
Cam Systems

The purpose of this in vitro study was to evaluate marginal and internal fits of ceramic crowns fabricated with chairside computer-aided design and manufacturing (CAD/CAM) systems. An experimental model based on ISO 12836:2015 was digitally scanned with different intraoral scanners (Omnicam (CEREC), EZIS PO (DDS), and CS3500 (Carestream)). Ceramic crowns were fabricated using the CAD/CAM process recommended by each system (CEREC, EZIS, and Carestream systems; N = 15). The 3-dimensional (3D) marginal and internal fit of each ceramic crown was measured using a 3D inspection software (Geomagic control X). Differences among the systems and various measurements were evaluated using the Kruskal–Wallis test. Statistically significant differences were validated using pairwise comparisons (α = 0.05). Occlusal gaps in the CEREC, EZIS, and Carestream groups were 113.0, 161.3, and 438.2 µm, respectively (p < 0.001). The axial gaps were 83.4, 78.0, and 107.9 µm, respectively. The marginal gaps were 77.8, 99.3, and 60.6 µm, respectively, and the whole gaps were 85.9, 107.3, and 214.0 µm, respectively. Significant differences were observed with the EZIS system compared with the other two systems in terms of the marginal gap sizes. The CEREC system showed no significant differences among the four measured regions. However, the EZIS and Carestream systems did show a statistically significant difference (p < 0.05). All three systems were judged to be capable of fabricating clinically acceptable prostheses, because the marginal gap, which is the most important factor in the marginal fit of prostheses, was recorded to be below 100 µm in all three systems.

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