Publications by authors named "Pablo A Amoroso-Silva"
Apical periodontitis in endodontically-treated teeth: association between missed canals and quality of endodontic treatment in a Colombian sub-population. A cross-sectional study.
Acta Odontol Latinoam
April 2024
Unlabelled: A high prevalence of post-treatment apical periodontitis associated to variables such as endodontic treatment quality and missed canals has been reported.
Aim: The aim of this study was to evalúate the quality of endodontic treatment and the frequency of missed canals associated with teeth with apicalperiodontitis (AP) through CBCTin a Colombian sub-population.
Material And Method: This was a cross-sectional study assessing 318 cone beam computed tomography (CBCT) scans of endodontically treated teeth from Colombian individuals.
Unlabelled: Current instrumentation systems cannot fully prepare oval root canal systems. This may cause accumulation of hard tissue debris and fail to eliminate bacteria from areas inaccessible to instrumentation, which could perpetuate periapical inflammation and jeopardize the success of endodontic treatment.
Aim: To evaluate the performance of two endodontic systems in oval canals by investigating the changes in volume, unprepared areas, and centering ability of XP-endo Shaper (XPS) and WaveOne Gold (WOG) in oval canals using microcomputed tomography (micro-CT).
To evaluate the internal morphology of 100 distal roots of mandibular first molars using micro-CT. Teeth were scanned to characterise: Vertucci type, root length, canal shape, presence and location of accessory canals, and the number of foramina at 4 mm from the apex, presence of root isthmus and the length from the primary canal to the apical foramen. Vertucci type I was found in 57% of cases, followed by V (27%).
View Article and Find Full Text PDFThis study compared the shaping ability of single-file reciprocating (WaveOne Gold) and multifile rotary (Mtwo) systems on mandibular oval-shaped canine root canals, using microcomputed tomography (micro-CT). Thirty mandibular canines were scanned by micro-CT and assigned to one of two groups (n=15) according to the system used for root canal preparation: WaveOne Gold or Mtwo. After preparation, the teeth were rescanned, and the percentage of untouched canal area, apical transportation and centering ability were analyzed.
View Article and Find Full Text PDFArticle Synopsis
- The study aimed to assess how different endodontic access cavity designs affect the amount of unprepared areas in canal walls and the flexural fatigue of instruments used in oval-shaped root canals.
- Forty-two mandibular incisors were scanned and divided into two groups: those with ultraconservative access cavities and those with traditional access cavities, and various tests were performed to analyze unprepared areas and instrument durability.
- Results showed no significant differences in unprepared areas or flexural fatigue resistance between the two cavity designs, indicating that using an ultraconservative design didn't negatively impact canal instrumentation.
Article Synopsis
- - The study aims to compare the effectiveness of limited vs large volume cone-beam computed tomography (CBCT) in identifying isthmuses in the apical root canals of mandibular molars.
- - Forty mandibular molars were scanned using micro-CT to establish measurements, and two CBCT systems were tested for their ability to detect these features, with statistical analyses conducted to compare results.
- - Both CBCT systems showed similar detection rates for isthmuses, but neither matched the performance of micro-CT, highlighting the usefulness of CBCT in endodontics despite its limitations.
Objective: The aim of this study was to evaluate the cyclic fatigue, torsional behavior and bending resistance of EdgeTaper Platinum [ETP (tip 25, taper 0.06)], Flex Gold [FG (tip 25, taper 0.08)], Pro-T [PT (tip 25, taper 0.
View Article and Find Full Text PDFIntroduction: Isthmuses are reported as common anatomic complexities in teeth often associated with failures in endodontic treatment. They should be considered before starting treatment and a preoperative computed tomography scan (CT) may demonstrate these complexities.
Objective: To assess the diagnostic value of the highest resolution settings of a cone-beam CT (CBCT) system in identifying and measuring apical isthmuses, using micro-CT as reference.
Introduction: The purpose of this study was to evaluate the accuracy of small-volume cone-beam computed tomography (CBCT) to detect and measure isthmi in the apical root canals of mandibular molars by using micro-computed tomography (μ-CT) as the reference standard.
Methods: Forty mandibular first molars selected on the basis of μ-CT scan and presenting isthmi in the apical 3-mm mesial roots were scanned by using the highest-resolution settings of a small-volume CBCT unit. Isthmi lengths were measured and compared between both μ-CT and CBCT images to study the accuracy of CBCT readings.
Article Synopsis
- - This study aimed to assess how different filling techniques and materials (gutta-percha and Resilon) affect the obturation of mesial root canals in mandibular first molars.
- - Using various methods like stereomicroscopy and confocal laser scanning microscopy, researchers compared the effectiveness of techniques like single cone, Thermafil, and Real Seal 1 in filling root canals, particularly analyzing sealers' penetration and void presence.
- - Results indicated that while no technique or material achieved complete filling of the root canals, plasticized techniques (like Thermafil and Real Seal 1) were found to be more efficient, with similar outcomes for both materials used.
Article Synopsis
- The study evaluated how two types of NiTi instrument systems (Conventional NiTi and Controlled Memory NiTi) affect root canal preparation quality in mandibular molars.
- Researchers used high-definition microcomputed tomography to analyze twelve molars, focusing on factors like dentin thickness and root canal volume before and after using the instruments.
- Results showed both instrument systems were similarly effective in shaping canals, but the Controlled Memory NiTi system maintained shape centralization better than the Conventional NiTi in the cervical area.
A new improved protocol for in vitro intratubular dentinal bacterial contamination for antimicrobial endodontic tests: standardization and validation by confocal laser scanning microscopy.
J Appl Oral Sci
July 2016
Objectives: To compare three methods of intratubular contamination that simulate endodontic infections using confocal laser scanning microscopy (CLSM).
Material And Methods: Two pre-existing models of dentinal contamination were used to induce intratubular infection (groups A and B). These methods were modified in an attempt to improve the model (group C).
Introduction: The goal of the present study was to evaluate the morphometric aspects of the internal anatomy of the root canal system of mandibular second molars with C-shaped canals.
Methods: Fifty-two extracted second mandibular molars with C-shaped canals, fused roots, and radicular grooves were selected from a Brazilian population. The samples were scanned with a micro-computed tomographic scanner at a voxel size of 19.
This study analyzed the quality of obturation and physical properties of MTA Fillapex and AH Plus sealer. A sample of 30 human maxillary central incisors were instrumented with Protaper until a F5 (50/05) file. Both sealers were mixed with Rhodamine-B dye to allow visualization on a confocal laser-scanning microscope (CLSM).
View Article and Find Full Text PDFObjectives: To report cases of idiopathic osteosclerosis (IO), to review the literature on the subject, and to discuss its main characteristics, diagnosis, differential diagnosis, and treatment.
Material And Methods: Retrospective analysis of 354 panoramic radiographs, searching for IO, its size, shape, location, and noting patients' demographic information. Literature review used Medline and Lilacs databases and the terms idiopathic osteosclerosis OR bone sclerosis OR dense bone island AND jaws.
This study compared the fluid filtration, adaptation to the root canal walls, and the push-out bond strength of two resin-based sealers and three calcium silicate-based retrograde filling materials. Fifty maxillary canines were shaped using manual instruments and the apical portion was sectioned. Retrograde cavities of 3-mm depth were prepared.
View Article and Find Full Text PDFArticle Synopsis
- The study aimed to assess how ultrasonic activation impacts the filling quality of four epoxy resin-based sealers in root canals, particularly looking at sealer penetration, adaptation, and voids.
- Eighty-four human canine teeth were used, divided into groups based on the type of sealer and whether they received ultrasonic activation during the filling process.
- Results showed that ultrasonic activation significantly improved sealer penetration and reduced gaps, although there were no notable differences in the presence of voids among the sealers tested.
Introduction: This study aimed to describe the anatomy of the mandibular incisors by using micro-computed tomography.
Methods: Mandibular incisors (n = 340) were scanned at 19-μm voxel size resolution, and the numbers of canals were classified according to Vertucci classification, as well as the major and minor diameters of the root and root canals, presence of oval canals, and three-dimensional analysis of the apical third were also measured. Data were presented in terms of median and range for each anatomic classification.