In vitro evaluation of bioburden, three‐dimensional stability, and accuracy of surgical templates without metallic sleeves after routinely infection control activities

2021 ◽  
Author(s):  
Marco Tallarico ◽  
Aurea Immacolata Lumbau ◽  
Chang‐Joo Park ◽  
Antonio Puddu ◽  
Franco Sanseverino ◽  
...  
Keyword(s):  
Infection Control ◽  
Dimensional Stability ◽  
Three Dimensional ◽  
In Vitro Evaluation ◽  
Stability And Accuracy ◽  
Surgical Templates

In vitro evaluation of three-dimensional ultrasonography based on magnetic scanhead tracking

1998 ◽  
Vol 24 (8) ◽  
pp. 1161-1167 ◽  
Author(s):  
Odd Helge Gilja ◽  
Trygve Hausken ◽  
Snorri Olafsson ◽  
Knut Matre ◽  
Svein Ødegaard
Keyword(s):  
Three Dimensional ◽  
In Vitro Evaluation

Ultrasonic three-dimensional imaging and volume: An in vitro evaluation

1982 ◽  
Vol 49 (4) ◽  
pp. 897 ◽  
Author(s):  
James F. Brinkley ◽  
William Desmond McCallum ◽  
Richard L. Popp
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
In Vitro Evaluation

In vitro evaluation of three-dimensional ultrasonography in volume estimation of abdominal organs

1994 ◽  
Vol 20 (2) ◽  
pp. 157-165 ◽  
Author(s):  
Odd Helge Gilja ◽  
Nils Thune ◽  
Knut Matre ◽  
Trygve Hausken ◽  
Svein ødegaard ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Volume Estimation ◽  
In Vitro Evaluation ◽  
Abdominal Organs

In Vitro Evaluation of Porous Biphasic Scaffolds

2007 ◽  
Vol 330-332 ◽  
pp. 935-938
Author(s):  
Silvia R. A. Santos ◽  
Antonella M. Rossi ◽  
L.R. Andrade ◽  
Marcelo Henrique Prado da Silva
Keyword(s):  
Stem Cells ◽  
Tricalcium Phosphate ◽  
Three Dimensional ◽  
Adipose Stem Cells ◽  
In Vitro Evaluation ◽  
Bioactive Ceramics ◽  
Biphasic Scaffolds

In the present study, two methods for the production of three-dimensional scaffolds made of bioactive ceramics are presented. Depending on the method, the final product can be composed by pure hydroxyapatite or biphasic: hydroxiapatite + tricalcium phosphate. Bioactivity tests showed that all scaffolds are bioactive. Preliminary studies with adipose stem cells indicated biocompatibility of both scaffolds.

scholarly journals A Proposed In Vitro Methodology for Assessing the Accuracy of Three-Dimensionally Printed Dental Models and the Impact of Storage on Dimensional Stability

2021 ◽  
Vol 11 (13) ◽  
pp. 5994
Author(s):  
Li Hsin Lin ◽  
Joshua Granatelli ◽  
Frank Alifui-Segbaya ◽  
Laura Drake ◽  
Derek Smith ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Reference Model ◽  
Three Dimensional ◽  
Posterior Region ◽  
Digital Light Processing ◽  
Dental Models ◽  
3D Printed ◽  
T1 And T2 ◽  
The Impact

The objective of this study was to propose a standardised methodology for assessing the accuracy of three-dimensional printed (3DP) full-arch dental models and the impact of storage using two printing technologies. A reference model (RM) comprising seven spheres was 3D-printed using digital light processing (MAX UV, MAX) and stereolithography (Form 2, F2) five times per printer. The diameter of the spheres (n = 35) represented the dimensional trueness (DT), while twenty-one vectors (n = 105) extending between the sphere centres represented the full-arch trueness (FT). Samples were measured at two (T1) and six (T2) weeks using a commercial profilometer to assess their dimensional stability. Significant (p < 0.05) contraction in DT occurred at T1 and T2 with a medium deviation of 108 µm and 99 µm for MAX, and 117 µm and 118 µm for F2, respectively. No significant (p > 0.05) deviations were detected for FT. The detected median deviations were evenly distributed across the arch for MAX at <50 µm versus F2, where the greatest error of 278 µm was in the posterior region. Storage did not significantly impact the model’s DT in contrast to FT (p < 0.05). The proposed methodology was able to assess the accuracy of 3DP. Storage significantly impacted the full-arch accuracy of the models up to 6 weeks post-printing.

scholarly journals Evaluation of Dimensional Changes According to Aging Period and Postcuring Time of 3D-Printed Denture Base Prostheses: An In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6185
Author(s):  
Seung-Ho Shin ◽  
Re-Mee Doh ◽  
Jung-Hwa Lim ◽  
Jae-Sung Kwon ◽  
June-Sung Shim ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
Three Dimensional ◽  
In Vitro Study ◽  
Denture Base ◽  
Dimensional Changes ◽  
Aging Period ◽  
Stability Change ◽  
3D Printed ◽  
The Stability

During the three-dimensional (3D) printing process of a dental prosthesis, using photopolymer resin, partially polymerized resin is further cured through the postcuring process that proceeds after the printing, which improves the stability of the printed product. The mechanical properties of the end product are known to be poor if the postcuring time is insufficient. Therefore, this study evaluated the effect of the postcuring time of the 3D-printed denture base on its dimensional stability, according to the aging period. The 3D prints were processed after designing maxillary and mandibular denture bases, and after the following postcuring times were applied: no postcuring, and 5, 15, 30, and 60 min. The dimensional stability change of the denture base was evaluated and analyzed for 28 days after the postcuring process. The trueness analysis indicated that the mandibular denture base had lower output accuracy than the maxillary denture base, and the dimensional stability change increased as postcuring progressed. In the no postcuring group for the mandible, the error value was 201.1 ± 5.5 µm (mean ± standard deviation) after 28 days, whereas it was 125.7 ± 13.0 µm in the 60 min postcuring group. For both the maxilla and the mandible, shorter postcuring times induced larger dimensional stability changes during the aging process. These findings indicate that in order to manufacture a denture base with dimensional stability, a sufficient postcuring process is required during the processing stage.

Plain and Covered Stent-Grafts: In Vitro Evaluation of Characteristics at Three-dimensional MR Angiography

Radiology ◽  
1999 ◽  
Vol 211 (3) ◽  
pp. 693-697 ◽  
Author(s):  
Paul R. Hilfiker ◽  
Harald H. Quick ◽  
Jörg F. Debatin
Keyword(s):  
Mr Angiography ◽  
Three Dimensional ◽  
Covered Stent ◽  
Stent Grafts ◽  
In Vitro Evaluation
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