scholarly journals CBCT and CAD-CAM technology to design a minimally invasive maxillary expander

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Diego Sánchez-Riofrío ◽  
María J. Viñas ◽  
Josep M. Ustrell-Torrent
Keyword(s):  
Computer Aided Design ◽  
Primary Stability ◽  
Clinical Results ◽  
Facial Soft Tissue ◽  
Surgical Guide ◽  
Current Technology ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printed ◽  
Mid Palatal Suture

Abstract Background A large number of articles in recent years studying the effects of non-surgically assisted tooth- versus bone-borne maxillary expanders in growing patients have found no significant differences in mid-palatal suture disjunction or even dentoalveolar changes. This suggests the need for new criteria and better use of current technology to make more effective devices and enhance the benefits of conventional treatments. This article describes a titanium grade V computer-aided design/computer-aided manufacturing (CAD/CAM) maxillary expander supported by two miniscrews, along with a 3D printed surgical guide. Methods The first step was to obtain a digitized model of the patient’s upper maxilla. To simplify the process and ensure the placement of the device in a high-quality bone area, the patients’ digital dental cast was superimposed with a cone beam computed tomography (CBCT) scan. Improved resistance to expansion forces was secured through the use of 2 mm-wide miniscrews, long enough for bicortical anchorage. Placement site and direction were assessed individually in order to achieve primary stability. We chose a site between the second premolars and first molars, while the inclination followed the natural contour of the palate vault. A 3D-printed, polyamide surgical guide was designed to ensure the correct placement of the device with a manual straight driver. Results Favorable clinical results were presented with 3D images. We confirmed a mid-palatal suture parallel separation of 3.63 mm, along with a higher palatal volume, as well as increased intercanine and intermolar distance. Segmentation of the facial soft tissue showed an expansion of nasal airways and changes in nasal morphology. Conclusions Digital models, CBCT and CAD/CAM technology, are essential to accomplish the goals proposed in this article. Further studies are necessary to establish safer miniscrew placement sites and insertion angles so as to achieve greater in-treatment stability. Both the clinician and the patient can benefit from the use of current technology, creating new devices and updating traditional orthodontic procedures.

Marginal Integrity, Internal Adaptation and Compressive Strength of 3D Printed, Computer Aided Design and Computer Aided Manufacture and Conventional Interim Fixed Partial Dentures

2019 ◽  
Vol 9 (12) ◽  
pp. 1745-1750
Author(s):  
Laila Al Deeb ◽  
Khold Al Ahdal ◽  
Ghaith Alotaibi ◽  
Abdullah Alshehri ◽  
Bader Alotaibi ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Computer Aided Design ◽  
Outer Edge ◽  
Marginal Fit ◽  
Marginal Integrity ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printed ◽  
Internal Adaptation ◽  
Aided Design

The aim was to investigate the marginal fit, internal adaptation and compressive strength of SLA provisionals (SLA) in comparison to CAD-CAM and conventional (CONV) interim fixed partial dentures (FPDs). Thirty interim FPDs were fabricated using CAD-CAM technology (CAD-CAM blocks Ceramill TEMP, PMMA), conventional molding technique (CONV) (TrimPlus, PMMA) and Stereolithography (SLA) method (Form 2, Formlabs, PMMA) (n = 10). Internal adaptation (occlusal, coronal, middle and cervical) and marginal integrity (inner and outer edge) was assessed using micro-computerized tomography (Micro-CT). The failure and compressive strength was assessed by application of a static load at a crosshead speed of 1 mm/min until fracture. Data was analysed using ANOVA and multiple comparisons test. The maximum and minimum marginal mis-fit was for CONV (283.3± 98.6 nm) and CAD-CAM (68.2± 18.1 m) groups. CAD-CAM (68.2± 18.1 m) and SLA (84.7± 27.5 m) provisionals showed comparable marginal mis-fit (p > 0.05). The mean failure load was significantly higher (p < 0.05) in CAD-CAM (687.86± 46.72 N), compared to SLA (534.8± 46.1 N) and CONV (492.7± 61.8 N) samples. Compressive strength for CAD-CAM (2.44± 0.27 MPa) samples was significantly higher (p < 0.05) than SLA (1.80± 0.15 MPa) and CONV (1.65± 0.20 MPa) groups. Marginal fit and internal adaptation of SLA printed FPDs was comparable to CAD-CAM interims. Compressive strength of the SLA interims FPDs can withstand intra-oral loads.

scholarly journals Effect of Fabrication Method on Fracture Strength of Provisional Implant-Supported Fixed Dental Prostheses

Prosthesis ◽  
2020 ◽  
Vol 2 (4) ◽  
pp. 325-332
Author(s):  
Kelly M. Suralik ◽  
Jie Sun ◽  
Chia-Yu Chen ◽  
Sang J. Lee
Keyword(s):  
Computer Aided Design ◽  
Fracture Force ◽  
Fixed Dental Prosthesis ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printers ◽  
Fixed Dental Prostheses ◽  
3D Printed ◽  
Aided Design ◽  
Post Hoc

There has been an increase in utilizing 3D printers in dental restorations. The purpose of the study is to compare mechanical properties of 3D-printed prostheses to those of self-cured and/or computer-aided design-computer-aided manufacturing (CAD-CAM) restorations. A metal master typodont was prepared for the mandibular left sextant with implant analogs embedded at the first premolar and first molar positions with a missing second premolar. Three-unit provisional fixed dental prosthesis (FDP) was designed utilizing the 3Shape tooth library and forty-five uniform specimens were fabricated with different materials: self-cured poly(methyl methacrylate) (PMMA) (N = 15), milled PMMA CAD-CAM blocks (N = 15) and 3D-printed resin (N = 15). All specimens were tested using an Instron machine at a crosshead speed of 0.5 mm/min by an axial load on the occlusal surface of the second premolar pontic site. Statistical analysis was completed with Shapiro-Wilk, ANOVA and Tukey post-hoc tests. Mean fracture force was 300.61 N, 294.64 N and 408.49 N for self-cured PMMA, milled PMMA and 3D-printed resin, respectively. Mean force at FDP fracture of 3D-printed resin was significantly greater than the mean fracture force of either self-cured (p = 0.016, 95% CI [17.86, 197.91]) or milled (p = 0.010, 95% CI [23.83, 203.88]) PMMA.

scholarly journals 3D Printing beyond Dentistry during COVID 19 Epidemic: A Technical Note for Producing Connectors to Breathing Devices

Prosthesis ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 46-52 ◽  
Author(s):  
Leonardo Cavallo ◽  
Antonia Marcianò ◽  
Marco Cicciù ◽  
Giacomo Oteri
Keyword(s):  
Computer Aided Design ◽  
Technical Note ◽  
Digital Workflow ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printers ◽  
3D Printed ◽  
Dental Professional ◽  
Respiratory Devices ◽  
Aided Design

(1) Background: To mitigate the shortage of respiratory devices during the Covid-19 epidemic, dental professional volunteers can contribute to create printed plastic valves, adapting the dental digital workflow and converting snorkeling masks in emergency CPAP (continuous positive airways pressure) devices. The objective of this report was to provide the specific settings to optimize printing with the 3D printers of the dental industry. (2) Methods: In order to provide comprehensive technical notes to volunteer dental professionals interested in printing Charlotte and Dave connectors to breathing devices, the entire digital workflow is reported. (3) Results: The present paper introduces an alternative use of the dental Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) machinery, and reports on the fabrication of a 3D printed connection prototypes suitable for connection to face masks, thereby demonstrating the feasibility of this application. (4) Conclusions: This call for action was addressed to dentists and dental laboratories who are willing to making available their experience, facilities and machinery for the benefit of patients, even way beyond dentistry.

scholarly journals The accuracy of computer-aided design and manufacturing surgical-guide for infrazygomatic crest miniscrew placement

2021 ◽  
Vol 11 ◽  
pp. 48-55
Author(s):  
Prajak Jariyapongpaiboon ◽  
Jirawan Chartpitak ◽  
Jaturong Jitsaard
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
The Right ◽  
Aided Design ◽  
3D Software

Objectives: Infrazygomatic crest (IZC) surgical guides have been employed to prevent any avoidable complications during miniscrew insertion. The purpose of this study was to evaluate the accuracy of IZC miniscrew placement when using a surgical-guide developed by computer-aided design and manufacturing (CAD/CAM) techniques. Materials and Methods: Ten patients were scanned with cone-beam computed tomography for three-dimensional (3D) planning of IZC miniscrew placements. The upper arches were scanned separately, and virtual miniscrews were placed in the position planned by 3D software. The CAD/CAM surgical guides were designed and fabricated individually to enable accurate miniscrew placement. Subsequently, 20 self-drilling miniscrews were inserted at the right and left IZC areas using 5 CAD/CAM surgical guides (CS group, n = 10) and direct insertion (DI group, n = 10), respectively. Pre- and post-operative digital model images were compared, actual and planned miniscrew positions were superimposed and measured for 3D angular and distance deviations in the two groups. Comparisons between groups were made using the Kruskal–Wallis test. Results: In the CS group, the median coronal and sagittal angular deviations were 2.95 degrees (range 0.34–5.26 degrees) and 2.05 degrees (range 0.38–4.08 degrees), respectively, while the median coronal and apical deviations were 0.39 mm (range 0.24–0.51 mm) and 0.50 mm (range 0.16–0.66 mm). These deviations differed significantly from those of the DI group. Conclusion: The IZC CAD/CAM surgical guide has made it possible to control miniscrew placement with high precision.

scholarly journals Effects of Artificial Tooth Brushing and Hydrothermal Aging on the Mechanical Properties and Color Stability of Dental 3D Printed and CAD/CAM Materials

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6207
Author(s):  
Na-Eun Nam ◽  
Seung-Ho Shin ◽  
Jung-Hwa Lim ◽  
June-Sung Shim ◽  
Jong-Eun Kim
Keyword(s):  
Surface Roughness ◽  
Computer Aided Design ◽  
Color Stability ◽  
Color Difference ◽  
Hydrothermal Aging ◽  
Denture Teeth ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printed ◽  
Printed Materials

This study analyzed the surface roughness and waviness, Vickers hardness (VHN), and color changes of six types of 3D printed resins and computer-aided design/computer-aided manufacturing (CAD/CAM) materials after artificial toothbrushing. The average surface roughness height (Ra) change of Formlabs denture teeth A2 resin (FMLB) was not significant between after artificial toothbrushing (0.17 ± 0.02 μm and 0.17 ± 0.05 μm, respectively; mean ± standard deviation). However, the Ra value increased significantly in all remaining groups. Regarding waviness, polymethylmethacrylate (PMMA) had the largest increases in average waviness height (Wa) and maximum surface waviness height (Wz) between, before (0.43 ± 0.23 μm and 0.08 ± 0.02 μm), and after (8.67 ± 4.03 μm, 1.30 ± 0.58 μm) toothbrushing. There were no significant changes in Wa for Formlabs denture teeth A2 resin (FMLB) and NextDent C&B (NXT). After artificial toothbrushing, the dispersed-filler composite (DFC) group had the largest color difference (ΔE, of 2.4 ± 0.9), and the remaining materials had smaller changes than the clinical acceptance threshold of ΔE = 2.25. The VHN of FMLB and NXT were 9.1 ± 0.4 and 15.5 ± 0.4, respectively, and were not affected by artificial toothbrushing. The flexural strengths of the 3D printed materials were 139.4 ± 40.5 MPa and 163.9 ± 14.0 MPa for FMLB and NXT, respectively, which were similar to those of the polycarbonate and PMMA groups (155.2 ± 23.6 MPa and 108.0 ± 8.1 MPa, respectively). This study found that the evaluated 3D printed materials had mechanical and optical properties comparable to those of CAD/CAM materials and were stable even after artificial toothbrushing and hydrothermal aging.

Polylactic Acid 3D Printed Drill Guide for Dental Implants Using CBCT

2017 ◽  
Vol 68 (2) ◽  
pp. 341-342 ◽  
Author(s):  
Ovidiu Tiberiu David ◽  
Camelia Szuhanek ◽  
Robert Angelo Tuce ◽  
Andra Patricia David ◽  
Marius Leretter
Keyword(s):  
Polylactic Acid ◽  
Dental Implants ◽  
Computer Aided Design ◽  
Computer Assisted ◽  
Occlusal Contact ◽  
Surgical Guide ◽  
Cad Cam ◽  
Design Production ◽  
3D Printed ◽  
Aided Design

The aim of the present study is to describe a method for setting up a polylactic acid (PLA) 3D printed surgical guide for the minimally invasive insertion of dental implants using the CBCT (cone beam computed tomography) acquisition without occlusal contact and CAD � CAM (computer-aided design/computer assisted manufacture) software for its design, production and testing.

scholarly journals Evaluation of the Color Stability of 3D-Printed Crown and Bridge Materials against Various Sources of Discoloration: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5359
Author(s):  
Ji-Won Shin ◽  
Jong-Eun Kim ◽  
Young-Jin Choi ◽  
Seung-Ho Shin ◽  
Na-Eun Nam ◽  
...  
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Color Change ◽  
Color Stability ◽  
Control Group ◽  
Water Control ◽  
Storage Duration ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Printed

Recent advances in three-dimensional (3D) printing have introduced new materials that can be utilized for dental restorations. Nonetheless, there are limited studies on the color stability of restorations using 3D-printed crowns and bridge resins. Herein, the color stability of conventional computer-aided design/computer-aided manufacturing (CAD/CAM) blocks and 3D-printing resins was evaluated and assessed for their degrees of discoloration based on material type, colorant types (grape juice, coffee, curry, and distilled water (control group)), and storage duration (2, 7, and 30 days) in the colorants. Water sorption, solubility, and scanning electron microscope (SEM) analyses were conducted. A three-way ANOVA analysis showed that all three factors significantly affected the color change of the materials. Notably, the discoloration (ΔE00) was significantly higher in all 3D printing resins (4.74–22.85 over the 30 days) than in CAD/CAM blocks (0.64–4.12 over the 30 days) following immersion in all colorants. 3D-printing resins showed color differences above the clinical limit (2.25) following storage for 7 days or longer in all experimental groups. Curry was the most prominent colorant, and discoloration increased in almost all groups as the storage duration increased. This study suggests that discoloration must be considered when using 3D printing resins for restorations.

Computer-Assisted Surgery in the Lower Jaw: Double Surgical Guide for Immediately Loaded Implants in Postextractive Sites—Technical Notes and a Case Report

2010 ◽  
Vol 36 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Daniele De Santis ◽  
Luciano Claudio Canton ◽  
Alessandro Cucchi ◽  
Guglielmo Zanotti ◽  
Enrico Pistoia ◽  
...  
Keyword(s):  
Case Report ◽  
Computer Aided Design ◽  
Alveolar Bone ◽  
Computer Assisted Surgery ◽  
Functional Results ◽  
Computer Assisted ◽  
Surgical Guide ◽  
Surgical Template ◽  
Computer Aided ◽  
Cad Cam

Abstract Computer-assisted surgery is based on computerized tomography (CT) scan technology to plan the placement of dental implants and a computer-aided design/computer-aided manufacturing (CAD-CAM) technology to create a custom surgical template. It provides guidance for insertion implants after analysis of existing alveolar bone and planning of implant position, which can be immediately loaded, therefore achieving esthetic and functional results in a surgical stage. The absence of guidelines to treat dentulous areas is often due to a lack of computer-assisted surgery. The authors have attempted to use this surgical methodology to replace residual teeth with an immediate implantoprosthetic restoration. The aim of this case report is to show the possibility of treating a dentulous patient by applying a computer-assisted surgical protocol associated with the use of a double surgical template: one before extraction and a second one after extraction of selected teeth.

scholarly journals Computer-Guided Bone Biopsy: A Technical Note with the Description of a Clinical Case

2021 ◽  
Vol 8 (12) ◽  
pp. 214
Author(s):  
Federica Altieri ◽  
Giovanna Iezzi ◽  
Valeria Luzzi ◽  
Gianni Di Giorgio ◽  
Antonella Polimeni ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Computer Aided Design ◽  
Bone Biopsy ◽  
Three Dimensional ◽  
Technical Note ◽  
Invasive Approach ◽  
Surgical Guide ◽  
Stl File ◽  
Computer Aided ◽  
Cad Cam

Aim: The aim of this technical note is to present a computer-aided design–computer-aided manufacturing (CAD–CAM) surgical guide to perform a computer-guided bone biopsy. Traditionally, to diagnose abnormal conditions affecting jawbone, a bone biopsy is performed with the use of a trephine bur. The positioning of the bur, during the biopsy, is based on the skill of the surgeon; therefore, an inaccurate placement of a trephine bur may occur. The use of a guide, however, can minimize this risk and achieve a better result. Materials and Methods: To determine the site and the extension of bone sampling, the stereolithography file (STL) file of cone–beam computed tomography (CBCT) images is acquired using a specific planning software and superimposed with the STL file of a dental cast; a virtual surgical guide is designed, using the same software that allows a 3D (three-dimensional) view of the guide from different perspectives and planes. The number and site of guide tubes are determined on the basis of the width and the extension of the sampling; thanks to a 3D printer, the surgical guide is manufactured. Results: The use of a customized surgical guide realized with CAD–CAM technology allows a precise and minimally invasive approach, with an accurate three-dimensional localization of the biopsy site. Conclusions: The high precision, great predictability, time-effectiveness and versatility of the present guide should encourage the clinician to use this minimally invasive surgical approach, but controlled clinical trials should be conducted to evaluate the advantages as well as any possible complications.

Sign in / Sign up

Export Citation Format

Share Document