A new<i>in vitro</i>method to evaluate radio-opacity of endodontic sealers

Malka, V B; Hochscheidt, Gabriela Luiza; Larentis, Naiara Leites; Grecca, Fabiana Soares; Fontanella, Vania Regina Camargo; Kopper, Patrícia Maria Poli

doi:10.1259/dmfr.20140422

Cited by 11 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Methodsmentioning

confidence: 99%

“…Adobe Photoshop is already widely used in the dental and oral maxillofacial disciplines for measurement. 22,23 Intraoral radiographs were scanned at 1600 dpi, and panoramic radiographs were scanned at 300 dpi and saved as jpeg images.The radiographs were evaluated by two trained experienced oral and maxillofacial radiologists (DM, MD) tested for interobserver and intraobserver reliability; 24 the observers performed the assessment on all digital and scanned radiographs under the same conditions. 24 Differences between digital and scanned images were deemed clinically insignificant.…”

mentioning

confidence: 99%

See 1 more Smart Citation

The Canadian Systemic Sclerosis Oral Health Study IV: oral radiographic manifestations in systemic sclerosis compared with the general population

Dagenais

MacDonald

Baron

et al. 2015

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

View full text Add to dashboard Cite

Objective-The aim of this study was to compare oral radiologic abnormalities associated with systemic sclerosis (SSc) against abnormalities in the general population.Study Design-Patients with SSc and healthy controls were enrolled in a multi-site crosssectional study. Included in the radiology examination were a panoramic radiograph, four bitewings, and an anterior mandibular periapical radiograph. Radiographs were evaluated by two oral and maxillofacial radiologists tested for interobserver and intraobserver reliability. Chisquared tests, Fisher exact tests, and Mann Whitney U tests were used to summarize the radiologic manifestations of patients and controls.Results-We assessed 163 SSc patients and 231 controls. Widening of the periodontal ligament space (PLS) (P < .001), with higher percentage of teeth with PLS widening (P < .001), was significantly more frequent in patients with SSc than in controls. The most significant differences between the two groups were found in the molars and premolars (P < .001). Moreover, 26% of the patients with SSc had a periapical PLS greater than 0.19 mm compared with 13% of the controls (P = .003). Patients with SSc had significantly more erosions compared with controls (14.5% vs. 3.6%; P < .001), mostly in the condyles (P = .022), coronoid processes (P = .005) and other locations (P = .012). CIHR Author Manuscript CIHR Author Manuscript CIHR Author ManuscriptConclusion-Patients with SSc had more teeth with PLS widening and erosions of the mandible compared with controls.Systemic sclerosis (SSc) is a multi-system disorder of connective tissue characterized clinically by thickening and fibrosis of the skin and involvement of internal organs. Prevalence estimates for SSc are between 240 per million 1 and 276 per million 2 in an American population. The incidence rate of SSc is about 20 new cases per million per year. 3 It affects mainly women in their third or fourth decade of life and is associated with significant morbidity and increased mortality. No treatment has been shown to alter the natural history of SSc. 4 SSc is characterized by fibroblast dysfunction, which leads to fibrosis of the skin, internal organs, or both; 5 autoantibodies (anticentromere, antitopoisomerase I, anti-RNA polymerase III); and vasculopathy. 5,6 SSc is usually categorized into limited cutaneous SSc (lcSSc), diffuse cutaneous SSc (dcSSc), and SSc without skin involvement. 6 Although several candidate genes and regions of the genome have been identified as potentially being involved in SSc, these are also associated with other autoimmune conditions. SSc is a complex disease, where no single polymorphism is known to cause the complete manifestation of the condition; it has been suggested that it may be the combined action of several single nucleotide polymorphisms in different genes that may result in the complex traits of the disease. 7 We compared patients with SSc with a control population and demonstrated that oral problems in patients with SSc include decreased oral opening, decreased s...

show abstract

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

The Canadian Systemic Sclerosis Oral Health Study IV: oral radiographic manifestations in systemic sclerosis compared with the general population

Dagenais

MacDonald

Baron

et al. 2015

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

View full text Add to dashboard Cite

show abstract

“…The generated images (TIFF format) were encoded and analyzed by one blinded and calibrated examiner (ICC=1), as described by Malka et al (7). Briefly, the examiner evaluated the images at a 50 cm distance from a 24-inch liquid crystal display monitor under dimmed light.…”

Section: Radiopacity Assessmentmentioning

confidence: 99%

“…In a recent investigation, a new in vitro method was proposed to evaluate radiopacity of endodontic materials using a tissue simulator to approximate radiopacity evaluation to the clinical reality. It was observed that the superimposition of anatomical structures increases the filling material radiopacity (7). So, since most root canal fillings are distinguished from anatomical structures during radiographic analysis, even in smaller diameters than 1 mm, is important to investigate the gutta-percha radiopacity in thinner samples than the recommendation.…”

Section: Introductionmentioning

confidence: 99%

Radiopacity Evaluation of Gutta-Percha Points in Thinner Samples than the ANSI/ADA Recommendation

et al. 2017

View full text Add to dashboard Cite

The aim of this study was to evaluate the radiopacity of different gutta-percha points (Endo Points®, Dentsply®, Tanari®, Meta®, Roeko® and Odous®) in samples of 1 mm thick as established by ANSI/ADA Specification #57 and ISO 6876/2001, in comparison with thinner samples. Twelve test specimens for each material, four for each thickness (0.3, 0.6, and 1 mm and diameter of 8 mm), were laminated and compressed between two polished glass plates until the desirable thickness. Digital radiographs were obtained along with a graduated aluminum stepwedge varying from 1 to 10 mm in thickness. The X-ray unit was set at 70 kVp, 10 mA and 0.4 s exposure time, at a focal distance of 36 cm. One calibrated observer quantified the average values of pixels with Adobe Photoshop® software. Data were analyzed using ANOVA and Tukey tests, at 5% significance level. At 0.6 and 1 mm thickness, all the tested materials showed radiopacity higher than 3 mm of aluminum (reference value). At 0.3 mm thickness, Odous and Tanari presented significantly less radiopacity than the reference, and the other materials showed similar radiopacity to the reference. The study concluded that the materials demonstrated different radiopacities and all had values above the minimum recommended by ANSI/ADA specification #57, being Odous and Tanari less radiopaque than the reference value in thinner samples (0.3mm).

show abstract

“…282 Alternatively, a clinically relevant test based on the clinical appearance and usage of MTA in radiographs could be considered, 283 possibly in a tissue simulator model with teeth and bone. 284 Solubility affects radiopacity with more soluble MTAs illustrating greater loss of radiopacity over time. 223 Future studies should assess changes in radiopacity as dissolution occurs.…”

Section: Radiopacity (Iso 6876 and 9917-1)mentioning

confidence: 99%

Mineral Trioxide Aggregate: A review of clinical usage and investigations of the effects of modifying particle size

Ha¹

View full text Add to dashboard Cite

show abstract

A newin vitromethod to evaluate radio-opacity of endodontic sealers

Cited by 11 publications

References 26 publications

The Canadian Systemic Sclerosis Oral Health Study IV: oral radiographic manifestations in systemic sclerosis compared with the general population

The Canadian Systemic Sclerosis Oral Health Study IV: oral radiographic manifestations in systemic sclerosis compared with the general population

Radiopacity Evaluation of Gutta-Percha Points in Thinner Samples than the ANSI/ADA Recommendation

Mineral Trioxide Aggregate: A review of clinical usage and investigations of the effects of modifying particle size

Contact Info

Product

Resources

About