scholarly journals Effect of Acid-Etching Duration on the Adhesive Performance of Printed Polyetheretherketone to Veneering Resin

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3509
Author(s):  
Jiaqi Zhang ◽  
Yingjie Yi ◽  
Chenwei Wang ◽  
Ling Ding ◽  
Ruijin Wang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Failure Modes ◽  
Three Dimensional ◽  
Acid Etching ◽  
Cross Sectional ◽  
Three Dimensional Printing ◽  
Dental Prostheses ◽  
Post Hoc ◽  
Dimensional Printing ◽  
Adhesive Performance

Three-dimensional printing polyetheretherketone (PEEK) provides a new choice for dental prostheses, while its appropriate bonding procedure and adhesive performance are still unclear. This study aimed to investigate the adhesive performance of printed polyetheretherketone (PEEK) after acid etching to veneering resin. In total, 182 PEEK specimens (including 91 printed and 91 milled specimens) were distributed to 14 subgroups (n = 13/subgroup), according to the manufacturing process and surface treatment. The specimens were polished and etched with sulfuric acid for 0, 5, 30, 60, 90, 120, and 300 s, respectively. Two specimens in each subgroup were observed under a scanning electron microscope (SEM) for surface and cross-section morphology separately. Then, the specimens were treated with a bonding primer, and one specimen in each subgroup was prepared for cross-sectional observation under SEM. The residual 10 specimens of each subgroup bonded with veneering resin were tested with the shear bond strength tests (SBS) and failure modes analysis. Statistical analysis was performed by one-way ANOVA followed by the SNK-q post hoc test (p < 0.05). The etched pores on the PEEK surface were broadened and deepened under SEM over time. Printed PEEK etched for 30 s obtained the best SBS-to-veneering-resin ratio (27.90 ± 3.48 MPa) among the printed subgroups (p < 0.05) and had no statistical differences compared with milled PEEK etched for 30 s. The SBS of the milled subgroups etched from 5 to 120 s were over 29 MPa without significant between-group statistical differences. Hence, printed PEEK can be coarsened effectively by 30 s of sulfuric acid etching. The adhesion efficacy of printed PEEK to veneering resin was qualified for clinical requirements of polymer-based fixed dentures.

Using Three-Dimensional Printing to Enhance Cross-Sectional Anatomy Instruction

2018 ◽  
Vol 108 (4) ◽  
pp. 304-310 ◽  
Author(s):  
Dominick J. Casciato ◽  
Natalie A. Builes ◽  
Bibi N. Singh
Keyword(s):  
Lower Extremity ◽  
Cross Sections ◽  
Clinical Skills ◽  
Three Dimensional ◽  
Cost Effective ◽  
Cross Sectional ◽  
Cadaveric Specimen ◽  
Three Dimensional Printing ◽  
Anatomical Dissection ◽  
Dimensional Printing

Background:The increased use of external interventions to diagnose and treat podiatric medical pathologies has warranted a greater understanding of the lower extremity in the transverse plane. Films, prosections, and plastinated cross sections have long been used alongside traditional instruction to assist students in anatomical studies. These methods, however, often fail to provide the tactile component of anatomical dissection and may obscure or exclude the requisite structures for identification by medical students. Such teaching techniques prove costly, time sensitive, and dated compared with the relatively less expensive and customizable nature of three-dimensional (3-D) printing.Methods:Limb length was measured on a cadaveric specimen, and eight cross sections of equal width were excised. Manual sketches of these sections were then digitized and 3-D printed.Results:Three-dimensional printing provides a safe and reproducible means to construct customizable cross sections of the lower extremity. Moreover, this method proves to be relatively inexpensive.Conclusions:Advancing traditional didactic teaching with the use of cost-effective 3-D printing can facilitate the visuospatial comprehension of lower-extremity anatomy. The evolution of 3-D printing enhances the clinical skills essential for the interpretation of imaging studies as well as planning for surgical procedures such as external fixation application.

Three-dimensional printed embedded channel–based resistive strain sensor: Fabrication and experimental characterization

2019 ◽  
Vol 30 (10) ◽  
pp. 1518-1526 ◽  
Author(s):  
Austin Smith ◽  
SM Mahdi Mofidian ◽  
Hamzeh Bardaweel
Keyword(s):  
Fused Deposition Modeling ◽  
Flexible Substrate ◽  
Three Dimensional ◽  
Cost Effective ◽  
Cross Sectional ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Elastic Filament ◽  
Deposition Modeling ◽  
Dimensional Printing

This work explores the feasibility of commercially available elastic filament and desktop fused deposition modeling three-dimensional printing as a simple and cost-effective route to develop flexible sensors. The fabricated sensor consists of a three-dimensional printed flexible substrate with embedded U-shaped channels that are filled with Galinstan (Ga 68.5% In 21.5% Sn 10%) liquid metal conductor. When the sensor is strained, the cross-sectional area of the channels decreases causing a reduction in the conducting area and, therefore, a change in resistance. First, sensors measuring approximately 2100 μm by 200 μm are fabricated. Results demonstrate gauge factors of approximately 2.1 at 38.8% strain with high linearity and little hysteresis. In addition, smaller strain sensors, measuring approximately 696 µm by 203 µm, are fabricated with gauge factors of nearly 1.0 at 13.2% strain. Results show that substrate relaxation plays an essential role in determining the functionality of these sensors. The Mullins effect largely influences the recovery properties of the rubber-like sensor substrate. This leads to a noticeable relaxation in the substrate during cyclic loading. The results demonstrate the potential of commercially available fused deposition modeling three-dimensional printing technology and filaments to produce complex designs and sensor platforms.

Jaw in a Day: Immediate Dental Rehabilitation during Fibula Reconstruction of the Mandible

2021 ◽  
Author(s):  
Adrian Ong ◽  
Fayette Williams ◽  
Ellen Tokarz ◽  
Tom Shokri ◽  
Daniel Hammer ◽  
...  
Keyword(s):  
Dental Implants ◽  
Three Dimensional ◽  
Free Flaps ◽  
Virtual Technology ◽  
Three Dimensional Printing ◽  
Surgical Workflow ◽  
Jaw Reconstruction ◽  
Dental Prostheses ◽  
Dental Rehabilitation ◽  
Dimensional Printing

AbstractReconstructing mandibular defects presents challenges to dental rehabilitation related to altered bone and soft tissue anatomy. Dental implants are the most reliable method to restore the lost dentition. Immediate dental implants have been placed for many years but with unacceptably low rates of dental/prosthetic success. Current virtual technology allows placement of both fibulas and guided implants in restoratively driven positions that also allow immediate dental rehabilitation. Inexpensive three-dimensional printing platforms can create provisional dental prostheses placed at the time of surgery. This article reviews our digital and surgical workflow to create an immediate dental prosthesis to predictably restore the dentition during major jaw reconstruction with fibula free flaps.

A novel fast disintegrating tablet fabricated by three‐dimensional printing

2009 ◽  
Vol 00 (00) ◽  
pp. 090730035508060-7
Author(s):  
Deng-Guang Yu ◽  
Chris Branford-White ◽  
Yi-Cheng Yang ◽  
Li-Min Zhu ◽  
Edward William Welbeck ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Fast Disintegrating Tablet ◽  
Dimensional Printing

Central ossifying fibroma of mandible

2020 ◽  
Vol 13 (12) ◽  
pp. e239286
Author(s):  
Kumar Nilesh ◽  
Prashant Punde ◽  
Nitin Shivajirao Patil ◽  
Amol Gautam
Keyword(s):  
Fibrous Tissue ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Ossifying Fibroma ◽  
Mandible Reconstruction ◽  
Three Dimensional Printing ◽  
Osseous Lesion ◽  
Large Size ◽  
Dimensional Printing

Ossifying fibroma (OF) is a rare, benign, fibro-osseous lesion of the jawbone characterised by replacement of the normal bone with fibrous tissue. The fibrous tissue shows varying amount of calcified structures resembling bone and/or cementum. The central variant of OF is rare, and shows predilection for mandible among the jawbone. Although it is classified as fibro-osseous lesion, it clinically behaves as a benign tumour and can grow to large size, causing bony swelling and facial asymmetry. This paper reports a case of large central OF of mandible in a 40-year-old male patient. The lesion was treated by segmental resection of mandible. Reconstruction of the surgical defect was done using avascular fibula bone graft. Role of three-dimensional printing of jaw and its benefits in surgical planning and reconstruction are also highlighted.

scholarly journals Three-Dimensional Printing in Orthopedics: from the Basics to Surgical Applications

2021 ◽  
Author(s):  
Leandro Ejnisman ◽  
Bruno Gobbato ◽  
Andre Ferrari de França Camargo ◽  
Eduardo Zancul
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Dimensional Printing
Sign in / Sign up

Export Citation Format

Share Document