Error propagation from intraoral scanning to additive manufacturing of complete-arch dentate models: An in vitro study

Auškalnis, Liudas; Akulauskas, Mykolas; Jegelevičius, Darius; Simonaitis, Tomas; Rutkūnas, Vygandas

doi:10.1016/j.jdent.2022.104136

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…CBCT has the advantages of high spatial resolution, low radiation dose, small size, and low cost compared with conventional medical CT. A digital ONF obturator takes advantage of its ability to be reconstructed to provide a 3D view of the patient’s oral cavity. Many studies have focused on the precision of CBCT [ 99 , 100 ], which is the basis of the digital manufacturing [ 101 ]. Because its low-density resolution, poor soft-tissue imaging, and metal artifacts hamper the achievement of accurate intraoral images, MRI is required to obtain clear soft-tissue images to compensate for nasal-side CBCT images [ 102 ].…”

Section: Digital Process Of Onf Obturatormentioning

confidence: 99%

Obturator Manufacturing for Oronasal Fistula after Cleft Palate Repair: A Review from Handicraft to the Application of Digital Techniques

Chen

Yang

Shi

et al. 2022

JFB

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An oronasal fistula (ONF) is an abnormal structure between the oral and nasal cavities, which is a common complication of cleft palate repair due to the failure of wound healing. When some patients with ONF are unsuitable for secondary surgical repair, the obturator treatment becomes a potential method. The objectives of the obturator treatment should be summarized as filling the ONF comfortably and cosmetically restoring the dentition with partial function. The anatomy of patients with cleft palate is complex, which may lead to a more complex structure of the ONF. Thus, the manufacturing process of the obturator for these patients is more difficult. For performing the design and fabrication process rapidly and precisely, digital techniques can help, but limitations still exist. In this review, literature searches were conducted through Medline via PubMed, Wiley Online Library, Science Direct, and Web of Science, and 122 articles were selected. The purpose of this review was to introduce the development of the obturator for treating patients with ONF after cleft palate repair, from the initial achievement of the obstruction of the ONF to later problems such as fixation, velopharyngeal insufficiency, and infection, as well as the application of digital technologies in obturator manufacturing.

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Section: Digital Process Of Onf Obturatormentioning

confidence: 99%

Obturator Manufacturing for Oronasal Fistula after Cleft Palate Repair: A Review from Handicraft to the Application of Digital Techniques

Chen

Yang

Shi

et al. 2022

JFB

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“…[31][32][33] The influence of the chosen AM technology, along with the combined effect of IOS and AM, on the trueness of fabricated crown dies necessitates further investigation. 34,35 Moreover, many current studies examining the accuracy of digital workflows lack a control group of stone models. [36][37][38][39] The incorporation of a stone control group is crucial to thoroughly assess the clinical applicability and reliability of digital techniques in restorative dentistry.…”

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confidence: 99%

Trueness of Crown Preparation Dies in Dental Models: An In Vitro Assessment of Digital and Analog Workflows

Auskalnis,

Akulauskas,

Jegelevicius

et al. 2024

Int J Prosthodontics

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To assess crown die trueness using additive manufacturing (AM) based on intraoral scanning (IOS) data and compare it with stone models. Materials and Methods: Crown dies with four finish line typesequigingival shoulder (SAE), subgingival shoulder (SAS), equigingival chamfer (CAE), and subgingival chamfer (CAS)-were incorporated into a reference model and scanned with a coordinate measurement machine (CMM; n = 1 scan). Trios4 (3Shape) scans generated a second reference dataset (IOS; n = 10 scans). Using scans, crown dies were produced with two different 3D printers (MAX UV385 [Asiga] and NextDent 5100 [3DSystems]; n = 10 per system). Stone dies were created from conventional impressions (n = 10). Specimens were digitized with a laboratory scanner (E4, 3Shape). Trueness was evaluated with Geomagic Control X (3DSystems). Data analysis was done using Shapiro-Wilk, Levene, ANOVA, and t tests (α < .05). Results: All crown dies fell within the clinically acceptable trueness range (150 µm). IOS exhibited significantly lower (P < .05; Δ ≤ 21.7 μm) or similar trueness compared to stone models. Asiga dies demonstrated similar and NextDent significantly lower marginal trueness than IOS (P < .05; Δ ≤ 57.3 μm). Most AM margin areas had significantly lower trueness than stone (P < .001; Δ ≤ 57.2 μm). Asiga outperformed NextDent (P < .001). Shoulder trueness surpassed chamfer in optical scans (P = .01). Finish line design and gingiva location did not have a significant impact on AM and stone models (P > .05). Conclusions: Combining IOS and AM achieves clinically acceptable crown die trueness for single molar teeth. The choice of AM device is critical, with Asiga outperforming NextDent. Finish-line design has an impact on optical scans. Finish-line design and marginal gingiva location have little effect on AM trueness.

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“…6,8,10,11 However, factors such as layer thickness, 12 printing orientation, 13 base design, 14 postprocessing protocols, temperature, 15 storage conditions, and the 3D manufacturing trinomial (3D printer, technology, material) 16 can affect the accuracy and surface features of the manufactured objects. 5,10,17 Recently, clinically relevant factors such as the error propagation of digital scans to 3D printed casts, 18 the accuracy and trueness of complete arch intraoral scans, [19][20][21][22] and the effect of different manufacturing parameters on the accuracy of 3D printed casts and removable dies have been evaluated. 9,12 Although research has demonstrated that contemporary 3D printers are highly accurate, 5 when the design comprises multiple components, as for the alveolar casts with removable dies used to fabricate fixed partial dentures, factors such as layer thickness and the geometry of the retentive portion can affect the fit between the removable die and the cast.…”

mentioning

confidence: 99%

Positional trueness of three removable die designs with different root geometries manufactured using stereolithographic 3D printing

Azpiazu-Flores,

Johnston,

Mata-Mata

et al. 2023

The Journal of Prosthetic Dentistry

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Error propagation from intraoral scanning to additive manufacturing of complete-arch dentate models: An in vitro study

Cited by 8 publications

References 31 publications

Obturator Manufacturing for Oronasal Fistula after Cleft Palate Repair: A Review from Handicraft to the Application of Digital Techniques

Obturator Manufacturing for Oronasal Fistula after Cleft Palate Repair: A Review from Handicraft to the Application of Digital Techniques

Trueness of Crown Preparation Dies in Dental Models: An In Vitro Assessment of Digital and Analog Workflows

Positional trueness of three removable die designs with different root geometries manufactured using stereolithographic 3D printing

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