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Sodium alginate and hydroxypropyl methylcellulose hierarchical control of surface tension on silk fabrics for clean and efficient inkjet printing.

Silk is widely utilized in high-end fashion apparel, home textiles and other fields due to its excellent comfort and air permeability and moisture permeability. However, inkjet printing on silk typically requires two printings on the front and back side to obtain a good color performance, leading to high process cost and low efficiency. Herein, clean and efficient inkjet printing is achieved using hydroxypropyl methylcellulose/sodium alginate (HPMC/SA) graded to regulate the surface tension of silk. In comparison to traditional inkjet printing process, the process utilizing HPMC/SA graded trea…

Influence of filament loading technique on surrogate active pharmaceutical ingredient particle emissions during material extrusion 3D printing of tablets.

3D printing holds great promise to revolutionize pharmaceutical manufacturing, so for widespread clinical application, it is imperative to evaluate its safety and maximize its benefits. Herein, for the first time, particle emissions of the printing process of a model drug (fluorescein) were monitored in a test chamber to evaluate release. A filament extrusion-type 3D printer was used to make tablets from filaments loaded with fluorescein prepared by hot melt extrusion (HME) or diffusion (passive loading) techniques. Surface contamination of the printer was qualitatively documented. Average con…

Influence of 3D printing parameters on surface roughness and stainability of a denture base resin: An in vitro study.

STATEMENT OF PROBLEM: Liquid crystal display (LCD) printing systems have the advantages of lower costs, higher printing speed, and the ability to use the same resins as those used in digital light processing (DLP) systems. However, the effect of the printing angles on the properties of a denture base resin printed using LCD remains unknown. PURPOSE: The purpose of this in vitro study was to compare printing systems DLP and LCD and printing angles (0-, 45-, and 90 degrees) on the surface roughness (Ra) and stainability (ΔE00) of a 3-dimensionally (3D) printed denture base resin after immersion…

AI enhancing prefabricated aesthetics and low carbon coupled with 3D printing in chain hotel buildings from multidimensional neural networks.

There are approximately 70,000 economy chain hotels worldwide, generating about 300 million tons of carbon dioxide annually. While reducing … (SDG 7, 8, and 12), and offering valuable implications for robotic intelligent construction and 3D printing in prefabricated buildings industry.

Post-washing using a Soxhlet apparatus improves the mechanical properties and biocompatibility of 3D printing resin in contaminated solvent.

Photopolymerization-based 3D printing is widely used in dental manufacturing due to its precision and customizability. However, printed resin specimens require effective post-washing to remove unpolymerized resin, which is a critical step that affects both their mechanical properties and biocompatibility. A conventional ultrasonic bath may fail to achieve effective post-washing due to solvent contamination by the residual resin, resulting in incomplete cleaning and possible redeposition. This study investigated the use of a Soxhlet apparatus as an innovative post-washing method. By continuousl…

Study on the Impact of Pea Protein on the Printability and Storage Quality of the 3D Printing Pork Jerky.

Food 3D printing technology for meat products has garnered significant attention. However, natural meat often requires the modification of its relevant properties to meet the processing demands of 3D printing. This study utilized minced pork as the primary raw material and employed pea protein to enhance both the 3D printability and storage quality characteristics of the pork paste. The results indicated that the optimal printing performance was achieved with a pea protein addition level of 20% (pork-to-pea protein mass ratios of 5:1). Specifically, pea protein significantly improved the mater…

Outcomes of cranioplasty with customized artificial bone flap made by 3D printing technique in patients with aneurysmal subarachnoid hemorrhage.

OBJECTIVE: This study compared clinical and cosmetic outcomes of cranioplasty using customized three-dimensional (3-D) printed implants versus autologous bone in patients with aneurysmal subarachnoid hemorrhage (aSAH) after decompressive craniectomy (DC). METHODS: We retrospectively reviewed 50 patients who underwent cranioplasty after DC for aSAH between July 2018 and December 2023. Patients were divided into the three-dimensional cranioplasty(3-DC, n=26) and autologous bone cranioplasty (AC, n=24) groups. Demographics, aneurysm characteristics, surgical parameters, morphometric analysis of

Patient-Specific Digital Modeling and 3D Printing for Preoperative Planning in a Pediatric Distal Radius Osteotomy: A Case Report.

INTRODUCTION: This case report describes the utilization of patient-specific 3D modeling for the care of a 13-year-old patient with a distal … osteotomy and full recovery with excellent function. DISCUSSION: Patient-specific 3D modeling and printing provide valuable tools for planning complex surgical cases. Further research is warranted to assess the broader applications of this technology in orthopedic surgery.

Evaluation of fracture resistance and surface characteristics in monolithic zirconia: a comparative analysis of 3D printing and milling techniques.

BACKGROUND: The primary method for fabrication of zirconia restorations is subtractive manufacturing technology. This process mills restorations from large blocks using various cutting tools resulting in large amounts of waste material. 3D printing has emerged as an alternative tool for additive manufacturing of zirconia with less waste and high efficiency. METHODS: A total of 24 monolithic zirconia crowns were divided into: Group I (milled zirconia crowns) and Group II (3D printed zirconia crowns) (n = 12). The crowns were then polished and glazed then subjected to 5000 thermocycles. Fractur…

A new individually designed 3D printing guide plate-assisted internal fixator (INFIX) surgery for the treatment of pelvic fractures.

OBJECTIVES: This study aimed to evaluate the effectiveness of 3D-printed guide plate-assisted descending INFIX technology in the management of unstable pelvic ring injuries. METHODS: This retrospective study analyzed the clinical data of 51 patients who underwent INFIX surgery for pelvic ring fractures at the Second Hospital of Shanxi Medical University between January 2023 and December 2024. Based on the use of 3D-printed guide plates, the patients were divided into two groups: conventional group (n = 28) and guide plate group (n = 23). The surgical parameters, including operative time, numbe

Virtual reduction and 3D printing in the management of edentulous atrophic mandibular body fractures: case series and literature review.

PURPOSE: The management of atrophic mandibular fractures presents challenges due to the absence of stable occlusion and the insufficient bone volume. In this case series, we present a technique based on virtual surgical planning and in-house computer-aided design and manufacturing (CAD/CAM) for the surgical treatment of severe atrophic mandibular fractures. METHODS: etween 1 January 2022 and 31 December 2024, eight patients with edentulous mandibular fractures were treated. Data collected included age, gender, cause of mandibular fracture, degree of atrophy according to Luhr's classification,

Case Report: Virtual surgery and 3D printing in a medication-related osteonecrosis of the jaws (MRONJ) pathological mandibular fracture.

INTRODUCTION: The use of anatomical models, guides, and surgical templates allows for increased precision of interventions and reduced operative times. Thanks to computer-aided design (CAD) and computer-aided manufacturing (CAM) technologies and rapid prototyping through 3D printing, it is possible to obtain accurate models, which are useful to defining surgical planning in the maxillofacial district. METHODS: We present the case of a patient with a pathological fracture of the mandibular body affected by medication-related osteonecrosis of the jaws (MRONJ) in stage III. Through the manipulat…

Combination of 3D Micro Contact Printing and Scraping Technique for Site Selective Cocultivation Across a Porous Micro Structured Scaffold.

3D-microcontact printing (3D-µCP) technique combines the advantages of microcontact printing and microthermoforming for the fabrication of functional biomaterials with complexity closer to real tissue. Despite its unmet advantages in terms of complexity and processability in a single step, this technique is limited to the front side of the substrate. Considering the advantage of inherent topography patterns on the reverse side of the substrate, an additional degree of patterning can be envisioned. However, selective patterning on the reverse side is challenging due to the fragility of the cell…

Clinical Efficacy of 3D-Printing Assisted Orbital Fracture Repair With Absorbable Plates Versus Preformed Titanium Mesh: A Comparative Study.

OBJECTIVE: To investigate the therapeutic effect and safety evaluation of preformed titanium mesh and absorbable plate in 3D print-assisted … tly shorter than that of the absorbable group in the conventional group ( P <0.05). CONCLUSION: 3D-printing technology enhances the precision of orbital fracture repair, resulting in shorter operative time, better anatomic restoration, and improved functional outcomes compared with conventional methods. Both preformed titanium mesh and absorbable plates a …

Evaluation of the pit and fissure system in primary and permanent molars with micro-computed tomography and 3D printing.

This study aimed to characterize the anatomical and physiological features of pits and fissures in primary and permanent molars by microtomographic (micro-CT) examination and three-dimensional (3D) printing. The occlusal surfaces of 84 primary molars and 60 permanent third molars were examined. The samples were scanned with micro-CT and the occlusal surface separated. The areas of the crown, its occlusal part, and fissures and pits were calculated. Digital impression of the occlusal surface was created and 3D printed. The frequency of different fissure types was determined by direct observatio…

A dual-crosslinking electroactive hydrogel based on gelatin methacrylate and dibenzaldehyde-terminated telechelic polyethylene glycol for 3D bio-printing.

Gelatin was widely used as scaffold materials in 3D bio-printing due to its excellent bioactivity and availability and especially that their arginine-glycine-aspartic acid (RGD) sequences could efficiently promote cell adhesion and proliferation. In this study, an electroactive and 3D bio-printable hydrogel was prepared through a two-step chemical cross-linking process. Specifically, residual free amino groups of methacrylated gelatin (GelMA) were cross-linked with the aldehyde groups of dibenzaldehyde-terminated telechelic polyethylene glycol (DF-PEG) via Schiff base bonds, forming a gel at 3…

Characterization of VOCs emissions and associated health risks inherent to the packaging and printing industries in Shandong Province, China.

Comprehensive volatile organic compounds (VOCs) emission control is imperative to decreasing occupational health risks and environmental impact of the packaging and printing industries. In this work, we investigated the VOCs emission characteristics and concentrations of individual contaminants generated by the packaging and printing industries, with regard to various categories, processes, and geographic regions. VOCs emissions, ozone formation potential (OFP), and associated health risks were assessed at 10 representative packaging and printing firms across several cities in Shandong Provinc…

Artificial intelligence assisted preoperative planning and 3D-printing guiding frame for percutaneous screw reconstruction in periacetabular metastatic cancer patients.

BACKGROUND: The percutaneous screw reconstruction technique, known as the "Tripod Technique," has demonstrated favorable clinical outcomes in the management of metastatic periacetabular lesions, as evidenced by our prior investigations and corroborated by independent studies. Nevertheless, there is a steep learning curve in handling this technique, with possible complications such as intraarticular screw placement. METHODS: Preoperative pelvic CT scans were acquired before surgery and utilized for the guiding frame design. A convolutional neural network model was trained with annotated data t

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… ML has successfully enhanced various aspects of 3D printing in the medical field. … Notable advancements include the integration of machine vision for multi-material 3D printing, improvements in 3D bioprinting processes, and robust quality control measures for 3D printed metal implants ( Ding et al., 2023 ). …

A Novel Strategy for Fabrication of Polyamide 66/Nanohydroxyapatite Composite Bone Repair Scaffolds by Low-Temperature Three-Dimensional Printing.

Due to the decomposition temperature of Polyamide 66 (PA66) in the environment is close to its thermoforming temperature, it is difficult to construct porous scaffolds of PA66/nanohydroxyapatite (PA66/HAp) by fused deposition modeling (FDM) three-dimensional (3D) printing. In this study, we demonstrated for the first time a method for 3D printing PA66/HAp composites at room temperature, prepared PA66/HAp printing ink using a mixed solvent of formic acid/dichloromethane (FA/DCM), and constructed a series of composite scaffolds with varying HAp content. This printing system can print composite m…