P20.09: Three-dimensional sonographic assessment of septate uterus before and after hysteroscopic metroplasty

Abstract Background The purpose of this study was to evaluate the changes in canal volume after root canal preparation in vivo with 3 different single-file techniques (Reciproc-Blue®, WaveOne-Gold® and XP-EndoShaper®), with a new method using CBCT and 3D reconstruction. Methods In this prospective study, thirty human lower premolars from healthy patients were used, in which extraction was indicated for orthodontic reasons. All the teeth used were caries- and restoration-free with complete root development, without signs of periodontal disease or traumatic occlusion, and with only one straight canal (up to 25º curvature). Teeth were randomly divided into three different groups: Reciproc-Blue, WaveOne-Gold and XP-EndoShaper. CBCT scans before root canal preparation were used to create a 3D reconstruction with RHINOCEROS 5.0 software to assess the initial canal volume, and then compared with 3D reconstructions after canal preparation to measure the increase in canal volume. Student’s t test for paired data were used to determine statistically significant differences between the before and after canal volumes. Anova test was used to determine statistically significant differences in the percentage of canal volume increase between the groups and Tukey's post-hoc test were used to paired comparison. Results Reciproc-Blue showed the higher increase in canal volume, followed by WaveOne-Gold and XP-EndoShaper (p = 0.003). XP-EndoShaper did not show a statistically significant increase in canal volume after root canal preparation (p = 0.06). Conclusion With this model, Reciproc-Blue showed higher increase in root canal volume, followed by WaveOne-Gold, while XP-EndoShaper did not significantly increase root canal volume during preparation.

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Scientific validation of three-dimensional stereophotogrammetry compared to the IGAIS clinical scale for assessing wrinkles and scars after laser treatment

Scientific Reports ◽

10.1038/s41598-021-91922-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Barbara Helena Barcaro Machado ◽

Ivy Dantas De Melo E. Silva ◽

Walter Marou Pautrat ◽

James Frame ◽

Mohammad Najlah

Keyword(s):

Laser Treatment ◽

Three Dimensional ◽

Skin Surface ◽

Clinical Scale ◽

3D Images ◽

Laser Resurfacing ◽

Before And After ◽

Measuring Outcomes ◽

Skin Scar ◽

Scientific Validation

AbstractMeasuring outcomes from treatments to the skin is either reliant upon patient’s subjective feedback or scale-based peer assessments. Three-Dimensional stereophotogrammetry intend to accurately quantify skin microtopography before and after treatments. The objective of this study is comparing the accuracy of stereophotogrammetry with a scale-based peer evaluation in assessing topographical changes to skin surface following laser treatment. A 3D stereophotogrammetry system photographed skin surface of 48 patients with facial wrinkles or scars before and three months after laser resurfacing, followed immediately by topical application of vitamin C. The software measured changes in skin roughness, wrinkle depth and scar volume. Images were presented to three observers, each independently scoring cutaneous improvement according to Investigator Global Aesthetic Improvement Scale (IGAIS). As for the results, a trend reflecting skin/scar improvement was reported by 3D SPM measurements and raters. The percentage of topographical change given by the raters matched 3D SPM findings. Agreement was highest when observers analysed 3D images. However, observers overestimated skin improvement in a nontreatment control whilst 3D SPM was precise in detecting absence of intervention. This study confirmed a direct correlation between the IGAIS clinical scale and 3D SPM and confirmed the efficacy and accuracy of the latter when assessing cutaneous microtopography alterations as a response to laser treatment.

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Three-dimensional changes in root angulation of buccal versus palatal maxillary impacted canines after orthodontic traction: A retrospective before and after study

International Orthodontics ◽

10.1016/j.ortho.2021.04.003 ◽

2021 ◽

Author(s):

Yalil Augusto Rodríguez-Cárdenas ◽

Luis Ernesto Arriola-Guillén ◽

Aron Aliaga-Del Castillo ◽

Gustavo Armando Ruíz-Mora ◽

Guilherme Janson ◽

...

Keyword(s):

Three Dimensional ◽

Dimensional Changes ◽

Impacted Canines ◽

Before And After ◽

Before And After Study

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P11.08: Three-dimensional ultrasound in diagnosis of septate uterus in patients with suspected congenital uterine anomalies

Ultrasound in Obstetrics and Gynecology ◽

10.1002/uog.8454 ◽

2010 ◽

Vol 36 (S1) ◽

pp. 210-210

Author(s):

B. Graupera ◽

M. Pascual ◽

B. Úbeda ◽

L. Hereter ◽

C. Pedrero ◽

...

Keyword(s):

Three Dimensional ◽

Septate Uterus ◽

Uterine Anomalies

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Weight-Reduction Optimization Design for Milling Planer Bed Based on Finite Element Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.2785 ◽

2012 ◽

Vol 490-495 ◽

pp. 2785-2789

Author(s):

Dong Sun ◽

Xu Dong Yang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Weight Reduction ◽

Optimization Design ◽

Weak Link ◽

Three Dimensional ◽

Production Costs ◽

Element Analysis ◽

Before And After ◽

Improvement Scheme

The milling planer bed is one of the most important foundational parts for the entire machine, sufficient stiffness is required. The posterior segment of a certain milling planer bed is regarded as the optimization object in this paper. Three-dimensional modeling method is used to calculate the exact weight of the bed and then finite element analysis is used to research the static and dynamic characteristics before and after weight-reduction. The weak link of the bed is found out and a improvement scheme is put forward ensuring lower production costs under the premise of sufficient rigidity.

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