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    Effect of 3D printer, implant analog and angulation on the accuracy of analog position in implant casts: Accuracy of implant casts using various scanning and manufacturing techniques
    (2024) Rutk?nas, Vygandas; Jegelevi?ius, Darius; Gedrimien?, Agn?; Revilla León, Marta; Pletkus, Justinas; Akulauskas, Mykolas; Eyüboğlu, Tan Fırat; Özcan, Mutlu; Auškalnis, Liudas
    Objectives: To evaluate the accumulative effect of 3D printer, implant analog systems, and implant angulation on the accuracy of analog position in implant casts. Methods: A reference cast, presenting a case of a three-unit implant-supported prosthesis, was scanned with a coordinate measurement machine, producing the first reference data set (CMM, n = 1). The second reference data set (n = 10) was prepared using an intraoral scanner (IOS) (Trios4). Test quadrant casts were produced using three DLP type 3D printers, Max (MAX UV385), Pro (PRO 4K65 UV), and Nex (NextDent 5100), and three implant analog systems, El (Elos), Nt (Nt-trading), and St (Straumann) (n = 90). Stone casts were also produced via analog impressions (Stone, n = 10). After digitization, the accuracy of 3D distance, local angulation (angle between implants) and global angulation (angle between the implant center axis and an axis perpendicular to the global plane) was evaluated by comparing the reference (CMM, IOS), test (3D print), and control (Stone) groups using metrology software. Data were statistically analyzed using three-way ANOVA and Tukey`s tests (? = 0.05). Results: IOS was truer in 3D implant distance and more precise in capturing local angulation than Stone (p ? 0.05). Other measurements were similar between both groups (p > 0.05). The amount of error introduced in the workflow by IOS and 3D printing was mostly similar (p > 0.05). 3D printed casts had similar or even higher accuracy than Stone group (p > 0.05). In most cases, higher trueness was achieved when using PRO 4K65 UV 3D printer and Elos implant analog system (p ? 0.05). Conclusion: 3D printer, implant analog system, and implant angulation have a significant effect on the accuracy of analog position in implant casts. Limited-span implant-supported cases could be reproduced digitally with similar accuracy as conventional methods. Clinical significance: A fully digital workflow with a carefully selected 3D printer and implant analog system can increase the accuracy of digitally produced implant casts with comparable accuracy to conventional workflow.
  • Küçük Resim
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    Effect of 3D printer, implant analog system, and implant angulation on the accuracy of analog position in implant casts
    (2024) Rutk?nas, Vygandas; Jegelevi?ius, Darius; Gedrimien?, Agn?; Revilla León, Marta; Pletkus, Justinas; Akulauskas, Mykolas; Eyüboğlu, Tan Fırat; Özcan, Mutlu; Auškalnis, Liudas
    Objectives: To evaluate the accumulative effect of 3D printer, implant analog systems, and implant angulation on the accuracy of analog position in implant casts. Methods: A reference cast, presenting a case of a three-unit implant-supported prosthesis, was scanned with a coordinate measurement machine, producing the first reference data set (CMM, n = 1). The second reference data set (n = 10) was prepared using an intraoral scanner (IOS) (Trios4). Test quadrant casts were produced using three DLP type 3D printers, Max (MAX UV385), Pro (PRO 4K65 UV), and Nex (NextDent 5100), and three implant analog systems, El (Elos), Nt (Nt-trading), and St (Straumann) (n = 90). Stone casts were also produced via analog impressions (Stone, n = 10). After digitization, the accuracy of 3D distance, local angulation (angle between implants) and global angulation (angle between the implant center axis and an axis perpendicular to the global plane) was evaluated by comparing the reference (CMM, IOS), test (3D print), and control (Stone) groups using metrology software. Data were statistically analyzed using three-way ANOVA and Tukey`s tests (?=0.05). Results: IOS was truer in 3D implant distance and more precise in capturing local angulation than Stone (p ? 0.05). Other measurements were similar between both groups (p > 0.05). The amount of error introduced in the workflow by IOS and 3D printing was mostly similar (p > 0.05). 3D printed casts had similar or even higher accuracy than Stone group (p > 0.05). In most cases, higher trueness was achieved when using PRO 4K65 UV 3D printer and Elos implant analog system (p ? 0.05). Conclusion: 3D printer, implant analog system, and implant angulation have a significant effect on the accuracy of analog position in implant casts. Limited-span implant-supported cases could be reproduced digitally with similar accuracy as conventional methods. Clinical significance: A fully digital workflow with a carefully selected 3D printer and implant analog system can increase the accuracy of digitally produced implant casts with comparable accuracy to conventional workflow.
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    Effect of different intraoral scanners on the accuracy of bite registration in edentulous maxillary and mandibular arches
    (2024) Rutk?nas, Vygandas; Jegelevi?ius, Darius; Gedrimien?, Agn?; Auškalnis, Liudas; Eyüboğlu, Tan Fırat; Özcan, Mutlu; Husain, Nadin Al-Haj; Akulauskas, Mykolas; Pletkus, Justinas
    Objectives: The objective of this study was to use in vitro models to examine the bite registration accuracy of four different intraoral scanners (IOS) for edentulous maxillary and mandibular arches. The objective was to assess the trueness and precision of the IOS and determine if there were significant differences between them. Methods: An Asiga Max UV 3D printer was used to print maxillary and mandibular edentulous models based on the shape of Frasaco models (artificial dental arch models). Four dental implants were placed symmetrically in both models using Straumann BLT RC implants. Digital impressions were taken with Primescan, Trios 3, Trios 4, and Medit i500 intraoral scanners (n = 10 for each IOS). Digital bite registrations were made, and scanning data was exported in STL format. The accuracy of the interarch distance (the distance between the metrological spheres attached to the mandibular and maxillary models) was estimated for each IOS. Results: The results showed significant differences in trueness and precision between different IOS (p <.05), except Medit i500 and Trios 3 (p >.05). Primescan provided the most accurate results, followed by Medit i500, Trios 3, and Trios 4, respectively. Conclusions: within the limitations of this study, the IOS type affects the accuracy of interocclusal bite registration in in vitro design. Only Primescan achieved clinically acceptable accuracy for the interocclusal recording of edentulous arches. Clinical Relevance: The comparison of the accuracy of bite registration between different intraoral scanners will help increase the efficiency of the clinical application of digitalized interarch registration.
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    Effect of reference objects on the accuracy of digital implant impressions in partially edentulous arches
    (2024) Rutkūnas, Vygandas; Jegelevičius, Darius; Pletkus, Justinas; Auškalnis, Liudas; Akulauskas, Mykolas; Eyüboğlu, Tan Fırat; Gedrimienė, Agnė
    PURPOSE. This study assesses the impact of additional reference objects (RO) on the trueness and precision of distance and angle measurements between scan bodies in digital scans with four different intraoral scanners (IOS) in partially edentulous models. MATERIALS AND METHODS. Maxilla models (Frasaco, Frasaco GmbH, Tettnang, Germany) with one (3-U) and two (4-U) missing posterior teeth were 3D printed and fitted with dental implants and scan bodies. Four intraoral scanners (Primescan (Dentsply Sirona, Charlotte, NC, USA) (PS), Trios 3 (3Shape) (T3), Trios 4 (3Shape) (T4), and CS3600 (Carestream Dentistry) (CS)) captured digital implant impressions with and without additional RO. Scans were aligned and assessed for distance and angulation measurements between scan bodies. Statistical analyses compared trueness and precision across model groups using the Student t-test and Welch’s ANOVA. RESULTS. CS consistently showed the highest distance values across IOS devices in both the 4-U and 3-U models (P <.05), both with and without RO. The distance values were not considerably affected by the presence of RO (P >.05), except for a few isolated cases in the PS and CS groups of 3-U models. When measuring angles, CS usually showed greater values than the other IOS devices, especially when RO was present both in the 4-U and 3-U variants (P <.05). CONCLUSION. The influence of additional reference objects on accuracy varies with different scanner types, irrespective of edentulous area length.
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    Erratum: Effect of reference objects on the accuracy of digital implant impressions in partially edentulous arches
    (2024) Rutkūnas, Vygandas; Jegelevičius, Darius; Pletkus, Justinas; Auškalnis, Liudas; Akulauskas, Mykolas; Eyüboğlu, Tan Fırat; Gedrimienė, Agnė
    This corrects the article “Effect of reference objects on the accuracy of digital implant impressions in partially edentulous arches” in volume 16 on page 302. [J Adv Prosthodont 2024;16: 302–310] DOI of original article: 10.4047/jap.2024.16.5.302 The article ‘Effect of reference objects on the accuracy of digital implant impressions in partially edentulous arches’ authored by Rutkūnas V, Jegelevičius D, Pletkus J, Auškalnis L, Akulauskas M, Eyüboğlu TF, Özcan M, Gedrimienė A, published in June issue [Vol 16, No 5] of The Journal of Advanced Prosthodontics (2024), has an erratum. In the above article, the affiliations were published incorrectly. The authors apologize for any inconvenience that it may have caused.