Related Experiment Video
Updated: Feb 7, 2026
09:11
Assessment of Global Ocular Structure Following Spaceflight Using a Micro-Computed Tomography Micro-CT Imaging Method
Published on: October 27, 2020
6.1K
Micro-CT evaluation of two different root canal filling techniques
R Castagnola1, L Marigo, R Pecci
1Department of Operative Dentistry and Endodontics, School of Dentistry, A. Gemelli Foundation, Catholic University of the Sacred Heart, Rome, Italy. castagnolaraffaella@gmail.com.
European Review for Medical and Pharmacological Sciences
|August 3, 2018
Summary
The GuttaCore obturation technique demonstrated fewer voids in the coronal and middle thirds of root canals compared to the single-cone technique. Both methods showed comparable results in the apical third.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Root canal obturation aims to create a fluid-tight seal to prevent bacterial ingress.
- Void formation during obturation can compromise treatment success and lead to persistent infection.
Purpose of the Study:
- To compare the frequency and volume of voids in root canals obturated with single-cone versus GuttaCore techniques using micro-computed tomography (micro-CT).
Main Methods:
- Forty decoronated single-rooted teeth were instrumented and irrigated.
- Samples were obturated using either the single-cone (n=20) or GuttaCore (n=20) technique.
- Micro-CT was used to analyze void presence and volume in coronal, middle, and apical thirds.
Main Results:
- Statistically significant differences in void frequency and volume were observed in the middle third and external voids in the coronal third (p<0.05).
- Both techniques showed significant internal and external void differences within their respective groups (p<0.05).
Conclusions:
- The GuttaCore technique yielded superior obturation with fewer voids in the coronal and middle thirds compared to the single-cone technique.
- Obturation results for both single-cone and GuttaCore techniques were comparable in the apical third (p>0.05).
Related Concept Videos
03:02Primary and Secondary Growth in Roots and Shoots
60.6K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
60.6K
00:57Root Mean Square
3.8K
If in an experiment, data values have a probability of being both positive and negative, neither the arithmetic mean, the geometric mean, nor the harmonic mean can be used to calculate the central tendency of the data set. In particular, if the positive and negative values are equally likely, the arithmetic mean is close to zero.
For example, consider the velocity of gas molecules in a container. The gas molecules are moving in different directions, which might impart positive and negative...
For example, consider the velocity of gas molecules in a container. The gas molecules are moving in different directions, which might impart positive and negative...
3.8K
01:30Radiological Investigation I: X-ray and CT
1.2K
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
1.2K
01:14Imaging Studies I: CT and MRI
901
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
901
01:28Imaging Studies for Cardiovascular System V: CT
374
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
374
01:05Properties of the Root Locus
308
The root locus method is an invaluable tool for analyzing higher-order systems without needing to factor the denominator of the transfer function. A pole of the system is identified when the characteristic polynomial in the transfer function's denominator equals zero.
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
308