Evaluation of the fused deposition modeling and the digital light processing techniques in terms of dimensional accuracy of printing dental models used for the fabrication of clear aligners

Jaber, Samer T; Hajeer, Mohammad Y; Khattab, Tarek Z; Mahaini, Luai

doi:10.1002/cre2.366

Cited by 28 publications

(27 citation statements)

References 21 publications

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“…Inaccuracies in the setup must be considered in addition to other critically discussed inaccuracies in aligner fabrication, such as model manufacturing [ 20 , 21 ] and thermoforming [ 22 ]. In 3D-printed models for aligner therapy, deviations of less than 0.25 mm compared to the virtual models are necessary [ 23 ]. After thermoforming, the resulting gap width between tooth surfaces and aligners was found to range between 0.10 mm and 0.35 mm, depending on the intraoral region and aligner material [ 19 ].…”

Section: Discussionmentioning

confidence: 99%

Accuracy of 3D Tooth Movements in the Fabrication of Manual Setup Models for Aligner Therapy

Sabbagh¹,

Heger²,

Stocker³

et al. 2022

Materials

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Background: The clinical outcome of aligner therapy is closely related to the precision of its setup, which can be manually or digitally fabricated. The aim of the study is to investigate the suitability of manual setups made for aligner therapy in terms of the precision of tooth movements. Methods: Six dental technicians were instructed to adjust each of eleven duplicate plaster casts of a patient models as follows: a 1 mm pure vestibular translation of tooth 11 and a 15° pure mesial rotation of tooth 23. The processed setup models were 3D scanned and matched with the reference model. The one-sample Wilcoxon signed-rank test (p < 0.05) was used for evaluation. Results: The overall precision of the translational movement covers a wide range of values from 0.25 to 2.26 mm (median: 1.09 mm). The target value for the rotation of tooth 23 was achieved with a median rotation of 9.76° in the apical-occlusal direction. Unwanted movements in the other planes also accompanied the rotation. Conclusions: A manual setup can only be fabricated with limited precision. Besides the very high variability between technicians, additional unwanted movements in other spatial planes occurred. Manually fabricated setups should not be favored for aligner therapy due to limited precision.

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Section: Discussionmentioning

confidence: 99%

Accuracy of 3D Tooth Movements in the Fabrication of Manual Setup Models for Aligner Therapy

Sabbagh¹,

Heger²,

Stocker³

et al. 2022

Materials

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“…Conversely, the Fortus450mc printer utilizes FDM or fused filament fabrication (FFF) technology that uses a continuous filament of a thermoplastic material, including ABS, PMMA, nylon, polylactic acid (PLA), polycarbonate (PC), polyethylene (PE), polyvinyl chloride (PVC), and others. The rationale for selecting these printers was to examine two commonly used 3D printing technologies (SLA and FDM) 10,20,21,23,26 as well as the two main classes of plastic materials (thermosets and thermoplastics). For milling, a 5-axis machine was used that has shown to manufacture models with highest accuracy (deviation ranging from 0 to 17 μm).…”

Section: Discussionmentioning

confidence: 99%

“…The present study compares two printer types: one desktop dental (SLA) and two industrial printers with different technologies (SLA and FDM). FDM uses thermoplastic extrusion to build a thin tread like spool of polymer to create a cross section of the part layer by layer with the most popular material used being Acrylonitrile Butadiene Styrene (ABS) and has increasing interest and support in the literature 20–24 . SLA, on the other hand, utilizes thermosetting polymers (for example resins) to create patterns in a layer‐by‐layer fashion using photochemical processes.…”

mentioning

confidence: 99%

Accuracy of Dental and Industrial 3D Printers

Anadioti

Kane

Bergler

et al. 2022

Journal of Prosthodontics

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Purpose: This in vitro study evaluated the dimensional accuracy of three 3D printers and one milling machine with their respective polymeric materials using a simplified geometrical model. Materials and methods:A simplified computer-aided design (CAD) model was created. The test samples were fabricated with three 3D printers: a dental desktop stereolithography (SLA) printer, an industrial SLA printer, and an industrial fused deposition modeling (FDM) printer, as well as a 5-axis milling machine. One polymer material was used per industrial printer and milling machine while two materials were used with the dental printer for a total of five study groups. Test specimens were then digitized using a laboratory scanner. The virtual outer caliper method was used to measure the linear dimensions of the digitized 3D printed and milled specimens in x-, y-, and z-axes, and compare them to the known values of the CAD model. Data were analyzed with Kruskal-Wallis one-way ANOVA on Ranks followed by the Tukey's test. Results: Milled specimens were not significantly different from the CAD model in any dimension (p > 0.05). All 3D printed specimens were significantly different from the CAD model in all dimensions (p = 0.01), except the dental SLA 3D printer with one of the polymers tested (Bis-GMA) which was not significantly different in two (x and z) dimensions (p = 0.4 and p = 0.12). Conclusions: The milling technology tested provided greater dimensional accuracy than the selected 3D printing. Printer, printing technology, and material selection affected the accuracy of the printed model.

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“…After the first premolars were removed, proper alignment of the case was done, then the attachments were added; after that, the treatment plan was subdivided into subsets considering the maximum transitional movement and rotation for each tooth per aligner 0.25 mm and 3 degrees, respectively. Virtual models were exported using the same 3shape software, printed using 3D validated printer (Moonray; Sprintray, Los Angeles, CA) [ 28 ], and clear aligners were fabricated for each model using the 0.762 mm Taguls™ premium (Taguls, Vedia solutions, Mumbai, India) aligner sheets and the Biostar® (Biostar, Scheu-dental, Iserlohn, Germany) thermoforming device. Each aligner was trimmed at the cervical margin of each tooth, polished, disinfected, and packed, then delivered to the patients.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Treatment With Clear Aligners Versus Fixed Appliances on Oral Health-Related Quality of Life in Patients With Severe Crowding: A One-Year Follow-Up Randomized Controlled Clinical Trial

Jaber¹,

Hajeer²,

Burhan³

et al. 2022

Cureus

Self Cite

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Objective To compare the level of oral health-related quality of life (OHRQoL) between patients receiving clear aligners or fixed appliances within one year of follow-up using Oral Health Impact Profile 14 (OHIP-14), a validated self-administered questionnaire. Materials and methods A single-centered, two-arm parallel-group randomized controlled clinical trial was conducted on 36 adult patients (19 females, 17 males; age range: 18 to 25 years) who had severe crowding and require orthodontic treatment with first premolars extraction. The patients were equally and randomly divided into two groups: The clear aligners (CA) group and the fixed appliances (FA) group. OHRQoL was assessed using the OHIP-14 tool at various times during comprehensive orthodontic therapy: baseline (T0), one week (T1), two weeks (T2), one month (T3), 6 months (T4), and 12 months (T5) after starting the active orthodontic treatment. Mann-Whitney U test or Friedman test were used to detect significant differences. The level of significance was set at 5%. Results All of the selected patients entered the statistical analysis stage. There were no significant differences between the CA and FA groups for the psychological discomfort, psychological disability, social disability, and handicap (P˃0.05) at almost all assessment times. For the functional limitation, physical pain, physical disability, and the overall score, there were significant differences between the studied groups (P˂0.05), with the FA group having higher mean scores than the CA group in all of the assessment times. Conclusion Patients' treatment with clear aligners has less impact on OHRQoL than those treated using conventional fixed appliances during the first year of treatment.

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Evaluation of the fused deposition modeling and the digital light processing techniques in terms of dimensional accuracy of printing dental models used for the fabrication of clear aligners

Cited by 28 publications

References 21 publications

Accuracy of 3D Tooth Movements in the Fabrication of Manual Setup Models for Aligner Therapy

Accuracy of 3D Tooth Movements in the Fabrication of Manual Setup Models for Aligner Therapy

Accuracy of Dental and Industrial 3D Printers

The Effect of Treatment With Clear Aligners Versus Fixed Appliances on Oral Health-Related Quality of Life in Patients With Severe Crowding: A One-Year Follow-Up Randomized Controlled Clinical Trial

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