Effect of calcium hydroxide removal techniques on the bond strength of root canal sealers

AIM: The aim of this study was to evaluate the efficacy of different lengths of time of passive ultrasonic irrigation (PUI) in removing calcium hydroxide (CH) paste from root canal, using scanning electron microscopy and energy dispersive spectrometry (SEM/EDS). MATERIAL AND METHODS: Fifty-four human premolars were used. After coronal access, a size #15 K-file was used to obtain apical patency. Root canal preparation was performed using WaveOne 40.08 instruments. CH paste was placed into the root canal. Specimens were stored in a humid environment, and after seven days, they were divided into five groups (n=12) according to the irrigation protocols: Manual– a size #40 K-file; PUI/1– 1 min; PUI/2– 2 min; PUI/3– 3 min; and Control– without CH paste. An elementary chemical microanalysis (SEM/EDS) was performed to quantify the presence of calcium on the dentinal walls. RESULTS: The percentage of calcium was higher in all experimental groups when compared to the control group (P < 0.05); but no differences among them were found (P > 0.05). CONCLUSION: The amount of calcium hydroxide paste on the dentinal walls was not dependent on length of time of ultrasonic activation. SEM/EDS analysis seems to be a reliable method to assess CH paste removal from the root canals.

Download Full-text

The effects of final irrigants on the push-out bond strength of two calcium silicate-based root canal sealers: an in vitro study.

European Oral Research ◽

10.26650/eor.2021922696 ◽

2021 ◽

Vol 0 (0) ◽

pp. 146-151

Author(s):

Davut Çelik ◽

Ayşe Özalp Koca ◽

Tuğba Koşar ◽

Tamer Taşdemir

Keyword(s):

Bond Strength ◽

Root Canal ◽

Calcium Silicate ◽

In Vitro Study ◽

Vitro Study ◽

Root Canal Sealers ◽

Push Out

Download Full-text

Assessment of Two Root Canal Sealers Push-out Bond Strength in Root Canals Obturated Using Two Different Obturation Techniques

Egyptian Dental Journal ◽

10.21608/edj.2019.72573 ◽

2019 ◽

Vol 65 (2) ◽

pp. 1487-1494

Author(s):

Bassem Eid ◽

Reem Abdel Gawad

Keyword(s):

Bond Strength ◽

Root Canal ◽

Root Canals ◽

Root Canal Sealers ◽

Push Out

Download Full-text

The effect of nonthermal plasma on the push-out bond strength of two different root canal sealers

Nigerian Journal of Clinical Practice ◽

10.4103/njcp.njcp_578_19 ◽

2020 ◽

Vol 23 (6) ◽

pp. 811

Author(s):

KY Yeter ◽

B Gunes ◽

A Terlemez ◽

E Seker

Keyword(s):

Bond Strength ◽

Root Canal ◽

Nonthermal Plasma ◽

Root Canal Sealers ◽

Push Out

Download Full-text

Histological analysis of the biocompatibility of three different calcium hydroxide-based root canal sealers

Journal of Applied Oral Science ◽

10.1590/s1678-77572006000500014 ◽

2006 ◽

Vol 14 (5) ◽

pp. 376-381 ◽

Cited By ~ 7

Author(s):

Heloisa Helena Pinho Veloso ◽

Roberto Alves do Santos ◽

Túlio Pessoa de Araújo ◽

Denise Piotto Leonardi ◽

Flares Baratto Filho

Keyword(s):

Calcium Hydroxide ◽

Study Design ◽

Inflammatory Reaction ◽

Root Canal ◽

Histological Analysis ◽

Subcutaneous Tissue ◽

Inflammatory Cells ◽

Control Groups ◽

Tissue Reactions ◽

Root Canal Sealers

OBJECTIVE: To histologically evaluate the behavior of the subcutaneous tissue of rats after placement of polyethylene tubes filled with calcium hydroxide-based root canal sealers (SealapexTM, ApexitTM e Sealer 26TM). STUDY DESIGN: The study employed 60 rats, which were divided into eight groups, being four experimental groups with 10 rats each, and four control groups with five rats. Analysis was conducted at 48 hours, 7, 21 and 60 days. RESULTS: Histological analysis revealed that all sealers were irritant; however, the intensity varied between each sealer and as a function of time. At the initial periods (48 hours and seven days), all materials demonstrated similar outcomes, with inflammatory reaction from severe to moderate, respectively. At the final periods (21 and 60 days), the tissue reactions to the implants containing SealapexTM displayed an active status yet with regression, compared to the ApexitTM and Sealer 26TM. The control groups exhibited less inflammatory cells than the experimental groups, keeping a reaction status with regression. CONCLUSIONS: The results achieved in this study revealed that the SealapexTM sealer was the most compatible, followed by ApexitTM and Sealer 26TM.

Download Full-text