Design of Additively Manufactured Lattice Structures for Biomedical Applications

Martorelli, Massimo; Gloria, Antonio; Bignardi, Cristina; Calı̀, Michele; Maietta, Sverio

doi:10.1155/2020/2707560

Cited by 18 publications

(9 citation statements)

References 10 publications

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“…In digital dental procedures, the digital impression method using an intraoral scanner is widely used [4]. Digitalized oral patient information can be applied to software in a variety of ways, and combining this with a dental CAD program allows dentists and technicians to design the prosthesis faster [5,6]. In conventional dental procedures, error in the model affect prosthesis accuracy [7].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Three-Dimensional Printing Accuracy of Partial-Arch Models According to Outer Wall Thickness: An In Vitro Study

et al. 2021

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The printing accuracy of three-dimensional (3D) dental models using photopolymer resin affects dental diagnostic procedures and prostheses. The accuracy of research into the outer wall thickness and printing direction data for partial-arch model printing has been insufficient. This study analyzed the effects of wall thickness and printing direction accuracy. Anterior and posterior partial-arch models were designed with different outer wall thicknesses. After 3D printing, a trueness analysis was performed. Those with full-arch models were the control group. The full-arch model had an error value of 73.60 ± 2.61 µm (mean ± standard deviation). The error values for the partial-arch models with 1-, 2-, and 3-mm thick outer walls were 54.80 ± 5.34, 47.58 ± 7.59, and 42.25 ± 9.19 μm, respectively, and that for the fully filled model was 38.20 ± 4.63 μm. The printing accuracies differed significantly between 0 degrees and 60 degrees, at 49.54 ± 8.16 and 40.66 ± 6.80 μm, respectively (F = 153.121, p < 0.001). In conclusion, the trueness of the partial-arch model was better than that of the full-arch model, and models with thick outer walls at 60 degrees were highly accurate.

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Section: Introductionmentioning

confidence: 99%

Evaluating the Three-Dimensional Printing Accuracy of Partial-Arch Models According to Outer Wall Thickness: An In Vitro Study

et al. 2021

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“…Recent improvements in dental computer-aided design/computer-aided manufacturing (CAD/CAM) systems have made it possible to digitize information about the oral cavity using an intraoral scanner or scanning a model using model scanner [3]. The obtained digitized data can be stored, retrieved, transmitted, and analyzed using various types of digital software [4,5]. In the diagnosis process for orthognathic surgery or implant surgery, cone beam computed tomography (CBCT) data and digital model data can be aligned, and this can be used to establish a surgery or treatment plan on digital software as well [6,7].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the 3D Printing Accuracy of a Dental Model According to Its Internal Structure and Cross-Arch Plate Design: An In Vitro Study

et al. 2020

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The amount of photopolymer material consumed during the three-dimensional (3D) printing of a dental model varies with the volume and internal structure of the modeling data. This study analyzed how the internal structure and the presence of a cross-arch plate influence the accuracy of a 3D printed dental model. The model was designed with a U-shaped arch and the palate removed (Group U) or a cross-arch plate attached to the palate area (Group P), and the internal structure was divided into five types. The trueness and precision were analyzed for accuracy comparisons of the 3D printed models. Two-way ANOVA of the trueness revealed that the accuracy was 135.2 ± 26.3 µm (mean ± SD) in Group U and 85.6 ± 13.1 µm in Group P. Regarding the internal structure, the accuracy was 143.1 ± 46.8 µm in the 1.5 mm-thick shell group, which improved to 111.1 ± 31.9 µm and 106.7 ± 26.3 µm in the roughly filled and fully filled models, respectively. The precision was 70.3 ± 19.1 µm in Group U and 65.0 ± 8.8 µm in Group P. The results of this study suggest that a cross-arch plate is necessary for the accurate production of a model using 3D printing regardless of its internal structure. In Group U, the error during the printing process was higher for the hollowed models.

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“…Recently, digital dentistry development, represented by computer-aided design/computer aided manufacturing (CAD/CAM), has significantly progressed in digital dental procedures of the oral cavity [ 1 ], creating more general access to digital oral information for patients [ 2 ]. This digitized oral information of the patient can be also stored, retrieved, transmitted, and analyzed within the software, and the dental CAD program can help dentists and technicians to construct dental design prostheses faster [ 3 , 4 ]. CAD/CAM developments have resulted in many changes in the processing of dental prostheses [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Design of Additively Manufactured Lattice Structures for Biomedical Applications

Cited by 18 publications

References 10 publications

Evaluating the Three-Dimensional Printing Accuracy of Partial-Arch Models According to Outer Wall Thickness: An In Vitro Study

Evaluating the Three-Dimensional Printing Accuracy of Partial-Arch Models According to Outer Wall Thickness: An In Vitro Study

Evaluation of the 3D Printing Accuracy of a Dental Model According to Its Internal Structure and Cross-Arch Plate Design: An In Vitro Study

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

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